ASTM MATERIALS FOR CAST VALVES


In this article, we illustrate the key cast valves materials, ASTM A216, ASTM A217, ASTM A352 (carbon and alloy steel) and ASTM A351 (stainless steel), their chemical and mechanical properties and recommended service. Cast valves are widely used in the petrochemical industry for pipelines above 2 inches in diameter.


VALVE MATERIAL SELECTION (CAST GRADES)

Cast valve body

The table shows the most common materials for cast valves and their respective recommended service:

MATERIAL GROUP MATERIAL GRADE RECOMMENDED SERVICE
High-temperature Carbon Steel ASTM A216 Grade WCB Non-corrosive fluids as water, oil, and gases at temperatures range -20°F (-30°C) and +800°F (+425°C)
Low-temperature Carbon Steel ASTM A352 Grade LCB Low temperature to -50°F (-46°C). Use excluded above +650°F (+340°C).
Low-temperature Carbon Steel ASTM A352 Grade LC1 Low temperature to -75°F (-59°C). Use excluded above +650°F (+340°C).
Low-temperature Carbon Steel ASTM A352 Grade LC2 Low temperature to -100°F (-73°C). Use excluded above +650°F (+340°C).
3.1/2% Nickel Steel ASTM A352 Grade LC3 Low temperature to -150°F (-101°C). Use excluded above +650°F (+340°C).
1.1/4% Chrome 1/2% Moly Steel ASTM A217 Grade WC6 Non-corrosive fluids as water, oil, and gases at temperatures range -20°F (-30°C) and +1100°F (+593°C).
2.1/4% Chrome ASTM A217 Grade C9 Non-corrosive fluids as water, oil and gases at temperatures range -20°F (-30°C) and +1100°F (+593°C).
5% Chrome 1/2% Moly ASTM A217 Grade C5 Mild corrosive or erosive applications and non-corrosive applications at temperatures between -20°F (-30°C) and +1200°F (+649°C).
9%Chrome
1% Moly
ASTM A217 Grade C12 Mild corrosive or erosive applications and non-corrosive applications at temperatures between -20°F (-30°C) and +1200°F (+649°C).
12% Chrome Steel ASTM A487 Grade CA6NM Corrosive application at temperatures between -20°F (-30°C) and +900°F (+482°C).
12% Chrome ASTM A217 Grade CA15 Corrosive application at temperatures up to +1300°F (+704°C)
Stainless steel 316 ASTM A351 Grade CF8M Corrosive or either extremely low or high-temperature non-corrosive services between -450°F (-268°C) and +1200°F (+649°C). Above +800°F (+425°C) specify carbon content of 0.04% or greater.
Stainless steel 347 ASTM 351 Grade CF8C Mainly for high temperature, corrosive applications between -450°F (-268°C) and +1200°F (+649°C). Above +1000°F (+540°C) specify carbon content of 0.04% or greater.
Stainless steel 304 ASTM A351 Grade CF8 Corrosive or extremely high temperatures non-corrosive services between -450°F (-268°C) and +1200°F (+649°C). Above +800°F (+425°C) specify carbon content of 0.04% or greater.
Stainless steel 304L ASTM A351 Grade CF3 Corrosive or non-corrosive services to +800F (+425°C).
Stainless steel 316L ASTM A351 Grade CF3M Corrosive or non-corrosive services to +800F (+425°C).
Alloy-20 ASTM A351 Grade CN7M Good resistance to hot sulfuric acid to +800F (+425°C).
Monel ASTM 743 Grade M3-35-1 Weldable grade. Good resistance to corrosion by all common organic acids and salt water. Also highly resistant to most alkaline solutions to +750°F (+400°C).
Hastelloy B ASTM A743 Grade N-12M Well suited for handling hydrofluoric acid at all concentrations and temperatures. Good resistance to sulphuric and phosphoric acids to +1200°F (+649°C).
Hastelloy C ASTM A743 Grade CW-12M Good resistance to span oxidation conditions. Good properties at high temperatures. Good resistance to sulphuric and phosphoric acids to +1200°F (+649°C).
Inconel ASTM A743 Grade CY-40 Very good for high-temperature service. Good resistance to spangly corrosive media and atmosphere to +800°F (+425°C).
Bronze ASTM B62 Water, oil or gas: up to 400°F. Excellent for brine and seawater service.


CARBON AND STAINLESS STEEL CAST VALVES

CARBON STEEL VALVES ASTM A216 WCA/WCB/WCC

ASTM A216 is a common material for cast valves in carbon steel.

ASTM A 216 Chemical composition, % max
ASTM A216 GRADE C Mn P S Si Cu Ni Cr Mo V
WCA UNS J02502 0.25(1) 0.70(1) 0.04 0.045 0.60 0.30 0.50 0.50 0.20 1.00
WCB UNS J03002 0.30(2) 1.00(2) 0.04 0.045 0.60 0.30 0.50 0.50 0.20 1.00
WCC UNS J02503 0.25(3) 1.20(3) 0.04 0.045 0.60 0.30 0.50 0.50 0.20 1.00

Notes:

  1. For each reduction of 0.01% below the specified maximum Carbon content, an increase of 0.04% manganese above the specified maximum is allowed up to a maximum of 1.10%.
  2. For each reduction of 0.01% below the specified maximum Carbon content, an increase of 0.04% Mn above the specified maximum is allowed up to a maximum of 1.28%.
  3. For each reduction of 0.01% below the specified maximum Carbon content, an increase of 0.04% manganese above the specified maximum is allowed to a maximum of 1.40%.

STAINLESS STEEL VALVES ASTM A351 CF3, CF8, CF8M

ASTM A351 is a common specification for stainless steel material for cast valves:

Chemical composition. % by material for cast valves (max. except whers range is given)
ASTM A351 GRADE UNS C Mn Si S P Cr Ni Mo Nb V N Cu
CF3+CF3A J9270 0.03 1.5 2.0 0.040 0.040 17.0-21.0 8.0-11.0 0.50
CF8+CF8A J9260 0.08 1.5 2.0 0.040 0.040 18.0-21.0 8.0-11.0 0.50
CF3M+CF3MA J9280 0.03 1.5 1.50 0.040 0.040 17.0-21.0 9.0-13.0 2.0-3.0
CF8M J9290 0.08 1.5 1.50 0.040 0.040 18.0-21.0 9.0-12.0 2.0-3.0
CF3MN J92804 0.03 1.5 1.50 0.040 0.040 17.0-21.0 9.0-13.0 2.0-3.0 0.10-.20
CF8C J92710 0.08 1.5 2.0 0.040 0.040 18.0-21.0 9.0-12.0 0.50 ( 1 )
CF10 J92950 0.04-0.10 1.5 2.0 0.040 0.040 18.0-21.0 8.0-11.0 0.50
CF10M J92901 0.04-0.10 1.5 1.50 0.040 0.040 18.0-21.0 9.0-12.0 2.0-3.0
CH8 J9340 0.08 1.5 1.50 0.040 0.040 22.0-26.0 12.-15.0 0.50
CH10 J93401 0.04-0.10 1.5 2.0 0.040 0.040 22.0-26.0 12.-15.0 0.50
CH20 J93402 0.04-0.20 1.5 2.0 0.040 0.040 22.0-26.0 12.0-15.0 0.50
CK20 J94202 0.04-0.20 1.5 1.75 0.040 0.040 23.0-27.0 19.0-22.0 0.50
HK30 J94203 0.25-0.35 1.5 1.75 0.040 0.040 23.0-27.0 19.0-22.0 0.50
HK40 J94204 0.35-0.45 1.5 1.75 0.040 0.040 23.0-27.0 19.0-22.0 0.50
HT30 N08030 0.25-0.35 2.0 2.50 0.040 0.040 13.0-17.0 33.0-37.0 0.50
CF10MC   0.10 1.50 1.50 0.040 0.040 15.0-18.0 13.0-16.0 1.7-2.25 ( 2 )
CN7M N0807 0.07 1.50 1.50 0.040 0.040 19.0-22.0 27.5-30.5 2.0-3.0 3.0-4.0
CN3MN J94651 0.03 2.0 1.0 0.010 0.040 20.0-22.0 23.5-25.5 6.0-.0 0.18-.26 0.75
CE8MN   0.08 1.0 1.50 0.040 0.040 22.5-25.5 8.0-11.0 3.0-.5 0.10-.30
CG-6MMN J93790 0.06 4.0-6.0 1.0 0.030 0.040 20.5-23.5 11.5-13.5 1.50-3.0 0.10-.30 0.10-.30 0.20-.40
CG8M J9300 0.08 1.50 1.50 0.040 0.040 18.0-21.0 9.0-13.0 3.0-4.0
CF10SMnN J92972 0.10 7.0-9.0 3.50-.50 0.030 0.060 16.0-18.0 8.0-9.0 0.08-.18
CT15C N08151 0.05-0.15 0.15-.50 0.50-.50 0.030 0.030 19.0-21.0 31.0-.0 0.50-.50
CK-3MCuN J93254 0.025 1.20 1.0 0.010 0.045 19.5-20.5 17.5-19.5 6.0-7.0 0.18-.24 0.50-1.0
CE20N J92802 0.20 1.50 1.50 0.040 0.040 23.0-26.0 8.0-.0 0.50 0.08-.20
CG3M J92999 0.03 1.50 1.50 0.040 0.040 18.0-21.0 9.0-.0 3.0-4.0

Notes:

  1. Grade CF8C shall have a Niobium content 8 times above the Carbon but not over 1.00%.
  2. Grade CF10MC shall have a Niobium content 10 times above the Carbon but not over 1.20%.

 


MECHANICAL PROPERTIES OF KEY MATERIALS FOR CAST VALVES

Material Code and Description Minimum Physical Properties Modulus Approximate
  MATERIAL GROUP MATERIALS FOR CAST VALVES (psi) Point (psi) in 2″ (%) of Area (%)    
1 Carbon Steel ASTM A216 Grade WCB 70,000 36,000 22 35 27.9 137-1 87
2 Carbon Steel ASTM A352 Grade LCB 65,000 35,000 24 35 27.9 137-1 87
3 Chrome Moly Steel ASTM A217 Grade C5 90,000 60,000 18 35 27.4 241 Max.
4 Carbon Moly Steel ASTM A217 Grad e WC1 65,000 35,000 24 35 29.9 215 Max.
5 Chrome Moly Steel ASTM A217 Grade WC6 70,000 40,000 20 35 29.9 215 Max.
6 Chrome Moly Steel ASTM A217 Grade WC9 70,000 40,000 20 35 29.9 241 Max.
7 3 1/2% Nickel Steel ASTM A352 Grade LC3 65,000 40,000 24 35 27.9 137
8 Chrome Moly Steel ASTM A217 Grade C12 90,000 60,000 18 35 27.4 180-240
9 Stainless Steel Type 304 ASTM A351 Grade CF-8 65,000 28,000 35 28 140
10 Stainless Steel Type 316 ASTM A351 Grade CF-8M 70,000 30,000 30 28.3 156-170
11 Cast Iron ASTM A126 Class B 31,000 160-220
12 Cast Iron ASTM A126 Class C 41,000 160-220
13 Ductile Iron ASTM A395 Type 60-45-15 60,000 45,000 15 23-26 143-207
14 Ductle Ni-Resist Iron (500 KG Load) ASTM A439 Type D-2B 58,000 30,000 7 148-211
15 Standard Valve Bronze ASTM B62 30,000 14,000 20 17 13.5 55-65*
16 Tin Bronze ASTM B143 Alloy 1A 40,000 18,000 20 20 15 75-85*
17 Manganese Bronze ASTM B147 Alloy 8A 65,000 25,000 20 20 15.4 98*
18 Aluminum Bronze ASTM B148 Alloy 9C 75,000 30,000 12 min. 12 17 150
19 Mondel Alloy 411 (Weldable Grade) 65,000 32,500 25 23 120-170
20 Nickel Moly Alloy B ASTM A494 (Hastelloy B) 72,000 46,000 6
21 Nickel Moly Chrome Alloy C ASTM A494 (Hastelloy C) 72,000 46,000 4
22 Cobalt-base Alloy No. 6 Stellite No. 6 121,000 64,000 01.feb 30.4
23 Aluminum Bar ASTM B211 Alloy 20911-T3 44,000 36,000 15 10.2 95
24 Yellow Brass Bar ASTM B16 1/2 Hard 45,000 15,000 7 50 14
25 Naval Brass Bar ASTM B21 Alloy 464 60,000 27,000 22 55
26 Leaded Steel Bar AISI 12L 14 79,000 71,000 16 52 163
27 Carbon Steel Bar ASTM A108 Grade 1018 69,000 48,000 38 62 143
28 AISI 4140 Chrome Moly Steel (Suitable for ASTM A193 Grade B7 bolt material) 135,000 115,000 22 63 29.9 255
29 Stainless Steel Type 302 ASTM A276 Type 302 85,000 35,000 60 70 28 150
30 Stainless Steel Type 304 ASTM A276 Type 304 85,000 35,000 60 70 149
31 Stainless Steel Type 316 ASTM A276 Type 316 80,000 30,000 60 70 28 149
32 Stainless Steel Type 316L ASTM A276 Type 316L 81,000 34,000 55 146
33 Stainless Steel Type 410 ASTM A276 Type 410 75,000 40,000 35 70 29 155
34 Stainless Steel Type 17-4PH ASTM A461 Grade 630 135,000 105,000 16 50 29 275-345
35 Nickel Copper Alloy Bar Alloy K500 (K Monel) 100,000 70,000 35 26 175-260
36 Nickel Moly Alloy B Bar ASTM B335 (Hastelloy B) 100,000 46,000 30
37 Nickel Moly Alloy C Bar ASTM B336 (Hastelloy C) 100,000 46,000 20

 


FORGED VS CAST MATERIAL GRADES

FORGED MATERIAL GRADES FOR VALVES CAST MATERIAL GRADES FOR VALVES
CARBON STEEL GRADES
ASTM A105N ASTM A216 WCB/WCC
ASTM A350 LF2 ASTM A352 LCB/LCC
ALLOY STEEL GRADES
ASTM A350 LF3 ASTM A352 LC3
ASTM A182 F5A/F5 ASTM A217 C5
ASTM A182 F9 ASTM A217 C12
ASTM A182 F11 ASTM A217 WC6
ASTM A182 F22 ASTM A217 WC9
ASTM A182 F91 ASTM A217 C12A
AUSTENITIC STAINLESS STEEL GRADES
ASTM A182 F304/F304L ASTM A351 CF8/CF3
ASTM A182 F316/F316L ASTM A351 CF8M/CF3M
ASTM A182 F347 ASTM A351 CF8C
ASTM A182 F321
ASTM A182 F44 (6MO) ASTM CK3MCuN
ASTM A182 F20 (ALLOY 20) ASTM A351 CN7M
FERRITIC-AUSTENITIC STAINLESS STEEL GRADES
ASTM A182 F51 – UNS S31803 (DUPLEX S.S.) ASTM A351 CD3MN
ASTM A182 F53 – UNS S32750 (SUPER DUPLEX S.S.) A890 GR.5A CE3MN*
ASTM A182 F55 – UNS S32760 (SUPER DUPLEX S.S.) A890 GR.6A CD3MWCuN
NICKEL ALLOY GRADES
INCONEL 825 – UNS N08825 ASTM B564-N08825 A484 CU 5MCuC*
INCONEL 600 – UNS N06600 ASTM B564-N06600 A494 CY40*
INCONEL 625 – UNS N06625 ASTM B564-N06625 A494 CW6MC*
MONEL 400 – UNS N04400 ASTM B564-N04400 A494 M35-1
TITANIUM GRADES
ASTM B381 GR.F2 ASTM B367 GR.C2
ASTM B381 GR.F3 ASTM B367 GR.C3