Valve Material Reference
ASTM A217 WC9 Valve
Chrome-Moly WC9 (2.25Cr-1Mo)ASTM A217 WC9 is a cast chrome-moly alloy (2.
Form
Cast
Max Temp
+593°C (+1100°F)
Min Temp
−18°C (0°F) — limited low-temp toughness
Category
Alloy Steel
Chemical Composition — ASTM A217 WC9
Temperature Range
Up to +593°C (+1100°F)
Maximum Temperature
+593°C (+1100°F)
Minimum Temperature
−18°C (0°F) — limited low-temp toughness
Equivalent Grades — ASTM A217 WC9
| Standard | Equivalent Grade |
|---|---|
| ASTM wrought equiv. | A182 F22 (2.25Cr-1Mo forged) |
| EN | GP240GH / 1.0619 (not direct equiv.) |
| DIN | GS-17CrMo55 |
| BS 1504 | 622 Grade 31 |
Suitable Services
Main steam (MS) service — coal, gas, and nuclear power plants
Hot reheat steam (HRH)
HP feedwater — Class 600–900, up to 593°C
Boiler superheater isolation valves
Hydrogen reformer service
Catalytic cracker (FCCU) high-temperature service
Not Suitable For
Temperatures above +593°C (use P91/F91 or P22/WC6 with caution)
Corrosive service (no corrosion resistance — carbon steel equivalent in acids)
Low-temperature service (brittle below −18°C)
Valve Body Applications
Gate valve bodies for main steam service (power plants)
Globe valve bodies for HP/LP bypass and extraction steam
Check valve bodies in feedwater and steam service
Steam trap valve bodies
Trim Applications
WC9 valve bodies with Stellite 6 or 21 overlay on seats
13Cr trim for gate valve wedges
Hard-faced seats mandatory for repeated thermal cycling
Typical Valve Types in ASTM A217 WC9
Gate valves: ASME Class 300–2500, IBR certified
Globe valves: Class 300–1500, high-pressure steam
Check valves: Class 300–600, feedwater service
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We supply ASTM A217 WC9 (Chrome-Moly WC9 (2.25Cr-1Mo)) gate valves, globe valves, ball valves, check valves, and more. Full certification documentation — EN 10204 3.1/3.2 MTCs, hydro test certs — as standard.