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
What is ASTM A217 WC9?
ASTM A217 WC9 (Chrome-Moly WC9 (2.25Cr-1Mo)) is a alloy steel valve material. ASTM A217 WC9 is a cast chrome-moly alloy (2.25% Cr, 1% Mo) used for valve bodies in high-temperature steam service. Temperature range: Up to +593°C (+1100°F).
- Form:
- cast
- Max Temp:
- +593°C (+1100°F)
- Min Temp:
- −18°C (0°F) - limited low-temp toughness
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
Vajra Industrial Solutions manufactures and supplies valves in ASTM A217 WC9 (Chrome-Moly WC9 (2.25Cr-1Mo)) for main steam (ms) service - coal, gas, and nuclear power plants, with EN 10204 3.1 material traceability on every order.
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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)) valves with full certification documentation — EN 10204 3.1/3.2 MTCs and hydrotest certs as standard.