Guidelines
Elastomer Selection Guidelines
DeZURIK Elastomer Selection Guidelines
The DeZURIK Elastomer Selection Guide is intended to be of assistance in the selection of the most suitable elastomer for various chemical services. This guide should only be used as a starting point in the selection process. There are many factors that affect an elastomer’s suitability that cannot be adequately expressed in chart form.
Factors Affecting Elastomer Selection
When selecting the most suitable elastomer for a particular application, many factors must be considered that can influence the service of the elastomer. These factors can include the type of chemical, temperature, concentration, abrasiveness, velocity, time of exposure and seating forces. These factors can lead to two basic types of failure: chemical deterioration and mechanical damage. When elastomer failure does occur, it will often be a combination of these two types of failure.
Chemical deterioration can occur by an actual chemical reaction between the media and the elastomer, or by an absorption of the media into the elastomer. Chemical deterioration leads to a decrease in the tensile strength and often to a swelling of the elastomer. The amount of chemical deterioration depends upon and generally increases with increasing temperature and concentration of the service. Chemical absorption can lead to a weakening of the bond with a resulting bond failure and a separating of the elastomer from the metal.
Although elastomers can be damaged by mechanical means only, the mechanical damage often occurs because of chemical deterioration. In a deteriorated condition, the weakened elastomer is more susceptible to damage from the flowing media especially if the media are highly abrasive and flowing at a high velocity. If a deteriorated elastomer has also swelled, the lost strength coupled with the resulting interference between the seating surfaces can lead to mechanical damage when the valve is closed.
An elastomer facing or lining, when in good physical condition, will often give abrasion resistance superior to metal. The actual size, shape, and hardness of the particles and their velocity are the determining factors in how well a particular elastomer resists mechanical damage from the media. Hard, sharp objects, including those foreign to the normal media, may cut or gouge the elastomer.
Seating forces higher than those recommended can put excessive strain on elastomer facings. Excessive strain on the elastomer will lead to shorter facing life especially if any chemical deterioration has occurred. Excessive seating forces may also lead to compression set of the elastomer. Compression set is a permanent deformation that remains in the elastomer after a compression force has been removed; this compression force occurs when the valve is closed. The area of the elastomer that has compression set is not only permanently deformed but is also less resilient than normal and may not offer the same shut-off. The possibility of compression set occurring increases with increasing temperature, compression force, and the length of time that the force is applied, and dependent upon the type of the elastomer.
Economics is not as important a factor in elastomer selection as it is in metal selection. Many of the available elastomers are the same price and the extra cost for others is often small when compared to the price of the complete valve.
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
Metal Selection Guidelines
DeZURIK Metal Selection Guidelines
Economics play an important role in the selection of the proper valve material. Since the more corrosion resistant materials such as stainless steel, Monel, etc., are also higher in cost, such considerations as increased valve life, cost difference, difficulty caused by valve failure and ease of replacement must be made in determining if the higher cost material is justified.
The pressure rating of the valve may also be a limiting factor in the valve material selection since the pressure rating differs with valve size and valve material. Carbon steel, stainless steel, and the more noble alloys have a higher pressure rating than bronze and bronze has a higher pressure rating than cast iron and Ni-Resist.
Types of Corrosion
There are many types of corrosion and each has a different effect on various metals. Two of the most important types that are frequently encountered in valves are general corrosion and pitting corrosion.
General corrosion attacks the metal uniformly, over the entire surface, forming oxides that go into solution or adhere to the metal surface. If adherence occurs, these oxides often act as a protective coating that retards further corrosion.
The most important factors that affect the rate of general corrosion are the temperature and concentration of the corrosive media. For all practical purposes, the rate of corrosion increases with increasing temperature. In general, the corrosiveness of a particular service also increases as its concentration increases. However, there are some services such as sulfuric acid where a lower concentration may be more corrosive than a higher concentration.
The velocity and abrasiveness of the media flowing past a metal surface also affects the rate of corrosion. A flowing media has a tendency to wear away any protective oxides that may have formed on the metal surface, thus leaving the metal more susceptible to further corrosion. As the velocity and abrasiveness of the media increases, the corrosion rate will also increase. This type of attack is often referred to as corrosion-erosion.
Pitting corrosion takes place when a protective coating of oxides is penetrated only at particular points. Once this penetration has occurred, pitting can proceed rapidly and deeply to a point of penetrating the metal. Pitting, which is most frequently found with stainless steels, is most apt to occur when the corrodents contain one of the halogens, such as chlorine.
Pitting is usually found under deposits from the corrosive media that have adhered to the metal surface, such as paper stock, due to a stagnant fluid condition. It is because of this formation that any velocity of the corrosive media may actually eliminate the possibility of this type of corrosion.
The addition of molybdenum to stainless steel will increase its resistance to pitting. Alloy 20 and 316 stainless steel, which have molybdenum, are more resistant to pitting than 304 stainless steel.
Good experience, backed up by good records of corrosion and valve life are valuable assets in the selection of the most suitable valve material. Particular characteristics of the service conditions which are not considered by the corrosion charts or recommendation guides can easily make experience the most important consideration in valve material selection.
Applications with service conditions that combine a mixture of corrosive media may result in more severe attack on the metal that any of the individual corrosive media handled separately. Selecting the correct material can only be accomplished through experience or by testing.
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
Elastomer / Polymer Material Data
CIIR (Chloro-Isobutene-Isoprene)
DeZURIK Elastomer Compound Description and Rating
CIIR (Chloro-Isobutene-Isoprene)
CIIR has outstanding impermeability to gases, excellent dielectric properties, good resistance to tearing, good aging properties at elevated temperatures and good chemical stability.
Mechanical Resistance Properties:
| IMPACT | GOOD |
| ABRASION | GOOD |
| TEAR | GOOD |
| CUT GROWTH | EXCELLENT |
Maximum Temperature Rating: 250°F (122°C)
Note: Not recommended for dry service on PEC and PEF Eccentric Plug Valves.
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
CR (Chloroprene)
DeZURIK Elastomer Compound Description and Rating
CR (Chloroprene)
CR is resistant to gasoline, sunlight, ozone and oxidation. It is flame resistant and will not support combustion. It has good resistance to the corrosive action of chemicals and water.
Mechanical Resistance Properties:
| IMPACT | GOOD |
| ABRASION | GOOD to EXCELLENT |
| TEAR | GOOD |
| CUT GROWTH | GOOD |
Maximum Temperature Rating: 180°F (82°C)
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
EPDM (Terpolymer of Ethylene, Propylene and a Diene)
DeZURIK Elastomer Compound Description and Rating
EPDM (Terpolymer of Ethylene, Propylene and a Diene)
EPDM is resistant to oxygen and ozone and has excellent color retention.
Mechanical Resistance Properties:
| IMPACT | GOOD |
| ABRASION | GOOD |
| TEAR | FAIR |
| CUT GROWTH | GOOD |
Maximum Temperature Rating:
- All Products except as noted below 250°F (121°C)
- AWWA Butterfly Valve 290°F (143°C)
- Air Valves, Check Valves, Surge Relief Valves, 300°F (150°C)
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
EU (Urethane)
DeZURIK Elastomer Compound Description and Rating
EU (Urethane)
Urethane is recommended for dry solids and abrasive slurries. It has excellent qualities for wear, tear and abrasion. It is resistant to oil and ozone.
Mechanical Resistance Properties:
| IMPACT | EXCELLENT |
| ABRASION | EXCELLENT |
| TEAR | EXCELLENT |
| CUT GROWTH | FAIR to EXCELLENT |
Maximum Temperature Rating: 175°F (80°C)
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
FKM (Fluoro Rubber)
DeZURIK Elastomer Compound Description and Rating
FKM (Fluoro Rubber)
FKM has excellent resistance to oils, fuels, lubricants, most mineral acids and many aliphatic and aromatic hydrocarbons that act as solvents for other rubbers. Excellent resistance to ozone, oxygen and weathering.
Mechanical Resistance Properties:
| IMPACT | POOR to GOOD |
| ABRASION | GOOD |
| TEAR | FAIR to GOOD |
| CUT GROWTH | POOR to GOOD |
Maximum Temperature Rating:
- Eccentric Plug Valves, Air Valves, Check Valves, Surge Relief Valves, 450°F (232°C)
- Resilient Seated Butterfly Valves, KGC Knife Gate Valves 400°F (204°C)
- CRF Flapper Swing Check Valves 425°F (218°C)
- KGC-BD Knife Gate Valves and PGV Ported Gate Valves 350°F (177°C)
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
NBR (Acrylonitrile-Butadiene)
DeZURIK Elastomer Compound Description and Rating
NBR (Acrylonitrile-Butadiene)
NBR is primarily used for applications requiring resistance to petroleum oils, gasoline, aromatic hydrocarbons, mineral and vegetable oils.
Mechanical Resistance Properties:
| IMPACT | FAIR |
| ABRASION | EXCELLENT |
| TEAR | GOOD |
| CUT GROWTH | GOOD |
Maximum Temperature Rating:
- All products except as noted below 180°F (83°C)
- Air Valves, Check Valves, Surge Relief Valves 250°F (121°C)
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
NR (Natural Rubber)
DeZURIK Elastomer Compound Description and Rating
NR (Natural Rubber)
NR provides a balance of tear strength, high resilience and tensile strength, good abrasion resistance and good flexural properties at low temperatures.
Mechanical Resistance Properties:
| IMPACT | EXCELLENT |
| ABRASION | EXCELLENT |
| TEAR | EXCELLENT |
| CUT GROWTH | EXCELLENT |
Maximum Temperature Rating: 180°F (82°C)
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
NRH (Hard Natural Rubber)
DeZURIK Elastomer Compound Description and Rating
NRH (Hard Natural Rubber)
NRH is a special natural rubber, graphite loaded ebonite with resistance to wet or dry chlorine gas, chlorinated brine and chlorine water solutions.
Mechanical Resistance Properties:
| IMPACT | POOR to FAIR |
| ABRASION | POOR to FAIR |
| TEAR | POOR to FAIR |
| CUT GROWTH | POOR to FAIR |
Maximum Temperature Rating: 180°F (82°C)
Notes: The leak rate of a hard natural rubber lined valve is equivalent to a metal-to-metal seated valve.
Not recommended for abrasive slurry applications. Where hard natural rubber and Chloroprene (CR) are recommended for a specific service, a CR soft rubber overlay on the plug is available for tight shut-off.
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
PTFE (Polytetraflouroethylene)
DeZURIK Compound Description and Rating
PTFE (Polytetraflouroethylene)
PTFE provides excellent chemical resistance to most non-abrasive fluids. It is a polymer, not an elastomer. To be used as a sealing member in a valve. Other factors such as fluid forces, elastomers, mechanical devices or a combination of these must be present to provide “elasticity” or memory to the PTFE sealing member.
Mechanical Resistance Properties:
| IMPACT | POOR to FAIR |
| ABRASION | POOR to FAIR |
| TEAR | POOR to FAIR |
| CUT GROWTH | POOR to FAIR |
Maximum Temperature Rating:
- High Performance Butterfly Valve (BHP)
- (TT) 450°F (232°C)
- (RT) 500°F (260°C)
- V-Port Ball Valve (VPB)
- (RT) 500°F (260°C)
Note: The PTFE temperature rating is dependent on pressure. Please see the appropriate bulletin for pressure-temperature ratings.
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
Metal Material Data – Pressure Temperature Ratings
304 Stainless Steel – ASTM A351, CF8
DeZURIK Pressure Temperature Rating Guide
304 Stainless Steel – ASTM A351, CF8
| Temperature (°F / °C) |
Pressure (psi / kPa) | ||||
|---|---|---|---|---|---|
| ASME Class | |||||
| 150 | 300 | ||||
|
-20 to 100
-30 to 40 |
275
1900 |
720
5000 |
|||
|
200
93 |
230
1600 |
600
4100 |
|||
|
300
150 |
205
1400 |
540
3700 |
|||
|
400
200 |
190
1300 |
495
3400 |
|||
|
500
260 |
170
1200 |
455
3200 |
|||
|
600
320 |
140
970 |
440
3000 |
|||
|
650
340 |
125
860 |
430
3000 |
|||
|
700
370 |
110
760 |
420
2900 |
|||
|
750
400 |
95
660 |
415
2900 |
|||
|
800
430 |
80
550 |
405
2800 |
|||
|
850
450 |
65
450 |
395
2700 |
|||
|
900
480 |
50
340 |
390
2700 |
|||
|
950
510 |
35
240 |
380
2600 |
|||
|
1000
540 |
20
140 |
355
2400 |
|||
Notes
- ASME B16.34
- At temperatures over 1000°F (540°C), use only if carbon content is 0.04% or higher.
- Flanged End Valve Ratings terminate at 1000°F (540°C).
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
316 Stainless Steel – ASTM A351, CF8M
DeZURIK Pressure Temperature Rating Guide
316 Stainless Steel – ASTM A351, CF8M
| Temperature (°F / °C) |
Pressure (psi / kPa) | |||
|---|---|---|---|---|
| ASME Class | ||||
| 150 | 300 | |||
|
-20 to 100
-30 to 40 |
275
1900 |
720
5000 |
||
|
200
93 |
235
1600 |
620
4300 |
||
|
300
150 |
215
1500 |
560
3900 |
||
|
400
200 |
195
1300 |
515
3600 |
||
|
500
260 |
170
1200 |
480
3300 |
||
|
600
320 |
140
970 |
450
3100 |
||
|
650
340 |
125
860 |
440
3300 |
||
|
700
370 |
110
760 |
435
3000 |
||
|
750
400 |
95
660 |
425
2900 |
||
|
800
430 |
80
550 |
420
2900 |
||
|
850
450 |
65
450 |
420
2900 |
||
|
900
480 |
50
340 |
415
2900 |
||
|
950
510 |
35
240 |
385
2700 |
||
|
1000
540 |
20
140 |
365
2500 |
||
Notes
- ASME B16.34
- Flanged End Valve Ratings terminate at 1000°F (540°C).
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
317 Stainless Steel – ASTM A351, CG8M
DeZURIK Pressure Temperature Rating Guide
317 Stainless Steel – ASTM A351, CG8M
| Temperature (°F / °C) |
Pressure (psi / kPa) | ||||
|---|---|---|---|---|---|
| ASME Class | |||||
| 150 | 300 | ||||
|
-20 to 100
-30 to 40 |
275
1900 |
720
5000 |
|||
|
200
93 |
235
1600 |
620
4300 |
|||
|
300
150 |
215
1500 |
560
3900 |
|||
|
400
200 |
195
1300 |
515
3600 |
|||
|
500
260 |
170
1200 |
480
3300 |
|||
|
600
320 |
140
970 |
450
3100 |
|||
|
650
340 |
125
860 |
440
3300 |
|||
|
700
370 |
110
760 |
435
3000 |
|||
|
750
400 |
95
660 |
425
2900 |
|||
|
800
430 |
80
550 |
420
2900 |
|||
|
850
450 |
65
450 |
420
2900 |
|||
|
900
480 |
50
340 |
415
2900 |
|||
|
950
510 |
35
240 |
385
2700 |
|||
|
1000
540 |
20
140 |
365
2500 |
|||
Notes
- ASME B16.34
- Flanged End Valve Ratings terminate at 1000°F (540°C).
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
Acid-Bronze – ASTM B427 Alloy C90700
DeZURIK Pressure Temperature Rating Guide
Acid-Bronze – ASTM B427 Alloy C90700
| Temperature (°F / °C) |
Pressure (psi / kPa) | |
|---|---|---|
| ASME Class | ||
| 150 | 300 | |
|
-20 to 150
-30 to 65 |
225
1600 |
500
3400 |
|
175
79 |
220
1500 |
490
3400 |
|
200
93 |
215
1500 |
475
3300 |
|
225
110 |
210
1400 |
465
3200 |
|
250
120 |
205
1400 |
450
3100 |
|
275
140 |
200
1400 |
440
3000 |
|
300
150 |
195
1300 |
425
2900 |
|
350
180 |
180
1200 |
400
2800 |
|
400
200 |
170
1200 |
375
2600 |
|
450
230 |
160
1100 |
350
2400 |
|
500
260 |
150
1000 |
325
2200 |
|
550
290 |
140
970 |
300
2100 |
Notes
- ASME B16.24
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
Alloy 20 – ASTM A351, CN7M
DeZURIK Pressure Temperature Rating Guide
Alloy 20 – ASTM A351, CN7M
| Temperature (°F / °C) |
Pressure (psi / kPa) | ||||
|---|---|---|---|---|---|
| ASME Class | |||||
| 150 | 300 | ||||
|
-20 to 100
-30 to 40 |
230
1600 |
600
4100 |
|||
|
200
93 |
200
1400 |
520
3600 |
|||
|
300
150 |
180
1200 |
465
3200 |
|||
|
400
200 |
160 1100 |
420 2900 |
|||
|
500
260 |
150 1000 |
390 2700 |
|||
|
600
320 |
140 970 |
360 2500 |
|||
Notes
- ASME B16.34
- Use solution annealed material only.
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
Bronze – ASTM B62, C83600
DeZURIK Pressure Temperature Rating Guide
Bronze – ASTM B62, C83600
| Temperature (°F / °C) |
Pressure (psi / kPa) | |
|---|---|---|
| ASME Class | ||
| 150 | 300 | |
|
0 to 150
15 to 65 |
225
1600 |
500
3400 |
|
175
79 |
220
1500 |
480
3300 |
|
200
93 |
210
1400 |
465
3200 |
|
225
110 |
205
1400 |
445
2800 |
|
250
120 |
195
1300 |
425
2900 |
|
275
140 |
190
1300 |
410
2800 |
|
300
150 |
180
1200 |
390
2700 |
|
350
180 |
165
1100 |
350
2400 |
|
406
210 |
150
1000 |
– |
|
450
230 |
135
930 |
280
1900 |
Notes
- ASME B16.24
- Some Codes (eg. ASME Boiler and Pressure Vessel Code, Section 1; ASME B31.1, ASME B31.5). limit the rating temperature to 406°F (210°C).
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
Carbon Steel – ASTM A216, Grade WCB
DeZURIK Pressure Temperature Rating Guide
Carbon Steel – ASTM A216, Grade WCB
| Temperature (°F / °C) |
Pressure (psi / kPa) | ||||
|---|---|---|---|---|---|
| ASME Class | |||||
| 150 | 300 | ||||
|
-20 to 100
-30 to 40 |
285
2000 |
740
5100 |
|||
|
200
93 |
260
1800 |
680
4700 |
|||
|
300
150 |
230
1600 |
655
4500 |
|||
|
400
200 |
200
1400 |
635
4400 |
|||
|
500
260 |
170
1200 |
605
4100 |
|||
|
600
320 |
140
970 |
570
3800 |
|||
|
650
340 |
125
860 |
550
3700 |
|||
|
700
370 |
110
760 |
530
3700 |
|||
|
750
400 |
95
660 |
505
3500 |
|||
|
800
430 |
80
550 |
410
2800 |
|||
|
850
450 |
65
450 |
320
1900 |
|||
Notes
- ASME B16.34
- Also applies for A516-70
- Permissible, but not recommended for prolonged use above 800°F (450°C) A216WCB and A516-70.
- Upon prolonged exposure to temperatures above 800°F (450°C), the carbide phase of steel may be converted to graphite.
- Not to be used over 850°F (450°C) A516-70.
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
Cast Iron – ASTM A126, Class B
DeZURIK Pressure Temperature Rating Guide
Cast Iron – ASTM A126, Class B
| Temperature (°F / °C) |
Pressure (psi / kPa) | |||||
|---|---|---|---|---|---|---|
| ASME Class 125 | ASME Class 250 | |||||
| 1″-12″ | 14″-24″ | 30″-48″ | 1″-12″ | 14″-24″ | 30″-48″ | |
|
-20 to 150
-30 to 65 |
200
1400 |
150
1000 |
150
1000 |
500
3400 |
300
2100 |
300
2100 |
|
200
93 |
190
1300 |
135
930 |
115
790 |
460
3200 |
280
1900 |
250
1700 |
|
225
110 |
180
1200 |
130
900 |
100
690 |
440
3000 |
270
1900 |
225
1600 |
|
250
120 |
175
1200 |
125
860 |
85
590 |
415
2900 |
260
1800 |
200
1400 |
|
275
140 |
170
1200 |
120
830 |
65
450 |
395
2700 |
250
1700 |
175
1200 |
|
300
150 |
165
1100 |
110
760 |
50
340 |
375
2600 |
240
1700 |
150
1000 |
|
325
160 |
155
1100 |
105
720 |
– |
355
2400 |
230
1600 |
125
860 |
|
353
180 |
150
1000 |
100 690 |
– |
335
2300 |
220
1500 |
100
690 |
|
375
190 |
145
1000 |
– | – |
315
2200 |
210
1400 |
– |
|
406
210 |
140
970 |
– | – |
290
2000 |
200
1400 |
– |
|
425
220 |
130
900 |
– | – |
270
1900 |
– | – |
|
450
230 |
125
860 |
– | – |
250
1700 |
– | – |
Notes:
- ASME B16.1
- 353°F (max.) reflects the temperature of saturated steam at 125 psi.
- 406°F (max.) reflects the temperature of saturated steam at 250 psi.
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
Ductile Iron – ASTM A536, Grade 65-45-12
DeZURIK Pressure Temperature Rating Guide
Ductile Iron – ASTM A536, Grade 65-45-12
| Temperature (°F / °C) |
Pressure (psi / kPa) | |
|---|---|---|
| ASME Class 150 | ASME Class 300 | |
|
-20 to 100
-30 to 40 |
250
1720 |
640
4410 |
|
200
90 |
235
1620 |
600
4135 |
|
300
150 |
215
1480 |
565
3895 |
|
400
200 * |
200
1380 |
525
3620 |
|
500
260 * |
170
1170 |
495
3410 |
|
600
315 * |
140
965 |
465
3205 |
|
650
345 * |
125
860 |
450
3100 |
Notes
- ASME B16.42
- *ASTM A395, Grade 60-40-18 above 450°F (230°C)
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
Hastelloy C – ASTM A494, CW-12MW
DeZURIK Pressure Temperature Rating Guide
Hastelloy C – ASTM A494, CW-12MW
| Temperature (°F / °C) |
Pressure (psi / kPa) | ||||
|---|---|---|---|---|---|
| ASME Class | |||||
| 150 | 300 | ||||
|
-20 to 100
-30 to 40 |
230
1600 |
600
4100 |
|||
|
200
93 |
210
1400 |
550
3800 |
|||
|
300
150 |
200
1400 |
520
3600 |
|||
|
400
200 |
190
1300 |
490
3400 |
|||
|
500
260 |
170
1200 |
465
3200 |
|||
|
600
320 |
140
970 |
440
3000 |
|||
|
650
340 |
125
860 |
430
3000 |
|||
|
700
370 |
110
760 |
420
1900 |
|||
|
750
400 |
95
660 |
410
2800 |
|||
|
800
430 |
80
550 |
400
2800 |
|||
|
850
450 |
65
450 |
395
2700 |
|||
|
900
480 |
50
340 |
385
2700 |
|||
|
950
510 |
35
240 |
380
2600 |
|||
|
1000
540 |
20
140 |
365
2500 |
|||
Notes
- ASME B16.34
- Flanged End Valve Ratings terminate at 1000°F (540°C).
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
Monel – ASTM A494, M-35-1
DeZURIK Pressure Temperature Rating Guide
Monel – ASTM A494, M-35-1
| Temperature (°F / °C) |
Pressure (psi / kPa) | ||||
|---|---|---|---|---|---|
| ASME Class | |||||
| 150 | 300 | ||||
|
-20 to 100
-30 to 40 |
230
1600 |
600
4100 |
|||
|
200
93 |
200
1400 |
525
3600 |
|||
|
300
150 |
190
1300 |
490
3400 |
|||
|
400
200 |
180
1300 |
475
3300 |
|||
|
500
260 |
170
1200 |
475
3300 |
|||
|
600
320 |
140
970 |
475
3300 |
|||
|
650
340 |
125
860 |
475
3300 |
|||
|
700
370 |
110
760 |
475
3300 |
|||
|
750
400 |
95
660 |
470
3200 |
|||
|
800
430 |
80
550 |
460
3200 |
|||
|
850
450 |
65
450 |
340
2300 |
|||
|
900
480 |
50
340 |
245
1700 |
|||
Notes
- ASME B16.34
- Use annealed material only.
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
Metal Material Data – Material Characteristics
17-4PH Stainless Steel
DeZURIK Material Characteristics Guide
17-4PH Stainless Steel
17-4PH stainless steel is a martensitic precipitation or age hardening alloy offering high strength and hardness along with excellent corrosion resistance. In general, the corrosion resistance is similar to that of 304 stainless steel. In addition, 17-4PH retains its corrosion resistance to temperatures about 50°F (10°C) less than the aging temperature. It also has excellent resistance to stress-corrosion cracking when hardened at 1025°F (552°C) or above. Hardening is achieved at temperatures from 900°F (482°C) to 1150°F (621°C). It may be machined in the annealed condition but it is not used until hardened.
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
440C Stainless Steel
DeZURIK Material Characteristics Guide
440C Stainless Steel
440C stainless steel is a high carbon martensitic chromium steel alloy designed to provide stainless properties with maximum hardness. It is generally used in the hardened and tempered condition. When fully heat treated 440C attains the highest hardness of any stainless steel, about Rockwell C 60. It is used primarily for parts subjected to high wear applications. 440C resists normal domestic and mild industrial environments, including many petroleum products and organic materials.
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
Aluminum ASTM B26, Alloy 356 & Alloy 713
DeZURIK Material Characteristics Guide
Aluminum ASTM B26, Alloy 356 & Alloy 713
Corrosion resistance of aluminum is dependent on the formation of a protective oxide film on the surface of the metal. This film is stable in aqueous media when the pH range is between 4.5 and 8.5. Corrosion resistance is dependent on the media that forms the film. Galvanic corrosion is a potential problem when aluminum is used in complex structures. Aluminum is anodic to most of the common materials such as iron , steel, stainless, titanium and nickel alloys.
| Mechanical Properties | Alloy 356 | Alloy 713 |
|---|---|---|
| Tensile Strength | 30,000 psi min. | 32,000 psi min. |
| Yield Strength | 20,000 psi min. | 22,000 psi min. |
| Elongation (in.) | 3% min. | 3% min. |
| Hardness,Brinell | 70 BHN | 75 BHN |
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
2205 Duplex Stainless Steel ASTM A995, Type CD3MN
DeZURIK Material Characteristics Guide
2205 Duplex Stainless Steel ASTM A995, Type CD3MN
Duplex Stainless steel is a grade that in the annealed state is composed of about equal parts of ferrite and austenite. Duplex stainless offer several advantages over austenitic grades. Duplex stainless grades are highly resistant to chloride stress corrosion cracking, have excellent pitting/crevice corrosion resistance and exhibit about twice the mechanical properties of austenitic stainless steels.
MECHANICAL PROPERTIES:
| Mechanical Properties | Duplex SST |
|---|---|
| Tensile Strength | 100,000 psi minimum |
| Yield Strength | 70,000 psi minimum |
| Elongation (in.) | 25% minimum |
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
GrafoilR
DeZURIK Material Characteristics Guide
Grafoil®
Grafoil® Gaskets and packing are all-graphite products containing no resin binders or organic fillers. Their outstanding resistance to corrosion, even at high temperatures, and their ability to retain compressibility at all temperatures, allows them to be recommended for service in many organic and inorganic applications.
Grafoil® is a registered trademark of Union Carbide Company.
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
Cobalt-Chromium Alloys (Stellite®)
DeZURIK Material Characteristics Guide
Cobalt-Chromium Alloys (Stellite®)
Stellite® is a registered trademark name for a series of cobalt based alloys with outstanding wear resistance. Cobalt-Chromium Alloys are available in most forms: wrought, cast, and powder metal parts. The most common use for Cobalt-Chromium Alloys is for hard facing on shafts, valve seats, and other high wear surfaces. This is done either by welding or spraying the alloy on a base metal surface. The most commonly used alloys are Stellite® 6, 4 and 12. Alloy 6 is the most frequently used because it is an excellent compromise of a hard wear resistant material with excellent resistance to corrosion, high temperatures, and shock loads. Alloys 4 and 12 are somewhat harder, but are less resistant to high temperatures and shock loads.
Stellite® is a registered trademark of Deloro Stellite, Holdings Corporation.
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
Tiodizing
DeZURIK Material Characteristics Guide
Tiodizing
Tiodizing is a coating deposited on titanium or titanium alloys by an electrolytic process using an alkaline bath. The primary reasons for using this coating are to eliminate the severe galling and seizing tendencies of uncoated titanium and to improve the wear resistance of the metal surface. Tiodizing does not alter the corrosion resistance of the base titanium or titanium alloy. The only corrosion resistance improvement is to prevent surface corrosion from hypergolic fuels, such as hydrazine and nitrogen tetroxide.
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
Titanium ASTM B367, Alloy C-2
DeZURIK Material Characteristics Guide
Titanium ASTM B367, Alloy C-2
As aluminum and stainless steel, titanium is dependent on an oxide film for its corrosion resistance. Titanium performs best in oxidizing media such as nitric acid. Titanium also has excellent corrosion properties in sea water, wet chlorine and organic chlorides.
MECHANICAL PROPERTIES:
| Mechanical Properties | Titanium |
|---|---|
| Tensile Strength | 50,000 psi minimum |
| Yield Strength | 40,000 psi minimum |
| Elongation (in.) | 15% minimum |
| Hardness,Brinell | 210 BHN maximum |
| Hardness,Rockwell | 96 B maximum |
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.
Tungsten Carbide
DeZURIK Material Characteristics Guide
Tungsten Carbide
Tungsten Carbide may be used as sintered powder metal parts or as a coating sprayed on the surface of a part. Carbides consist of finely divided grains held together with a binder, such as cobalt or nickel. Since tungsten is inert, the corrosion resistance of the tungsten carbide is dependent upon the binder used. Nickel is commonly used as the binder to provide optimum corrosion resistance. The hardness of a tungsten carbide surface is about Rockwell A90, which is similar to a hardness of Rockwell C76. The surface of tungsten carbide can be ground to a 15 to 20 micro inch surface finish and polished even smoother if required. The combination of hardness and smoothness give an exceptionally wear resistant surface. Tungsten carbide can be used effectively to 1000°F (538°C) in an oxidizing atmosphere and up to 1600°F (871°C) in a non-oxidizing atmosphere. It has been determined that it is also an excellent material at cryogenic temperatures.
No representation, warranty or guarantee, express or implied, is made by this selection guide due to the complexity and almost infinite variations of mixtures, concentrations, temperature and flow conditions possible in actual service.