Valve Material Reference
ASTM A182 F11 Valve
1.25Cr-0.5Mo Alloy Steel (F11)1.
Form
Forged
Max Temp
+540°C (+1000°F)
Min Temp
-29°C (-20°F)
Category
Alloy Steel
What is ASTM A182 F11?
ASTM A182 F11 (1.25Cr-0.5Mo Alloy Steel (F11)) is a alloy steel valve material. 1.25% Chromium - 0.5% Molybdenum forged alloy steel, the standard forged body material for moderate high-temperature service in refineries, petrochemical plants, and boiler feed water systems up to 540°C. Temperature range: -29°C to +540°C (-20°F to +1000°F).
- Form:
- forged
- Max Temp:
- +540°C (+1000°F)
- Min Temp:
- -29°C (-20°F)
Chemical Composition - ASTM A182 F11
Temperature Range
-29°C to +540°C (-20°F to +1000°F)
Maximum Temperature
+540°C (+1000°F)
Minimum Temperature
-29°C (-20°F)
Vajra Industrial Solutions manufactures and supplies valves in ASTM A182 F11 (1.25Cr-0.5Mo Alloy Steel (F11)) for boiler feed pump discharge block and check valves in power plants (350-450°c), with EN 10204 3.1 material traceability on every order.
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Equivalent Grades - ASTM A182 F11
| Standard | Equivalent Grade |
|---|---|
| ASTM cast | A217 WC6 |
| EN | 1.7335 13CrMo4-5 |
| UNS | K11597 |
| DIN | P11 / T11 |
Suitable Services
Boiler feed pump discharge block and check valves in power plants (350-450°C)
Crude column overhead and HVGO circuit isolation valves in atmospheric distillation units
Hydroprocessing unit valve bodies in hydrogen-rich environments at moderate temperatures
High-temperature steam valves where carbon steel WCB is temperature-limited
Refinery hot oil service gate and globe valves at 400-540°C
Not Suitable For
Nelson curve hydrogen attack limits - F11 allows up to 370°C/28 bar H2 partial pressure per API 941
Service above 540°C - use A182 F22 (2.25Cr-1Mo) or F91 (9Cr-1Mo-V)
Sour service - hardness must comply with NACE MR0175 22 HRC maximum (verify heat treatment)
Cryogenic service below -29°C - use A182 F304L or A352 LCB
Valve Body Applications
Gate valve bodies for boiler feed pump discharge lines at 350-450°C
Globe valve bodies in refinery hot oil service at 400-540°C
Check valve bodies on crude column overhead circuits
Ball valve bodies in hydroprocessing H2-rich moderate temperature service
Trim Applications
Gate valve wedge overlaid with 13Cr for high-temperature wear resistance
Globe valve seat and disc with Stellite 6 overlay for erosion service
Typical Valve Types in ASTM A182 F11
Gate valves
Globe valves
Check valves
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We supply ASTM A182 F11 (1.25Cr-0.5Mo Alloy Steel (F11)) valves with full certification documentation — EN 10204 3.1/3.2 MTCs and hydrotest certs as standard.