ASTM A182 F11 WN RF Flange, Chrome Molybdenum Alloy Forged Weld Neck Raised Face Flange
Brief Introduction
ASTM A182 F11 WN RF Flange is a high-performance chrome-molybdenum alloy forged flange, strictly manufactured in accordance with ASTM A182 and ASME B16.5 standards. F11 (UNS K11547) is a classic Cr-Mo alloy steel grade, featuring excellent high-temperature strength, creep resistance, hydrogen embrittlement resistance, and superior weldability. As a Weld Neck (WN) flange with Raised Face (RF), it is specially designed for high-temperature, high-pressure, and hydrogen-containing industrial piping systems, providing strong structural integrity and reliable sealing performance, widely applied in power plants, petrochemical, refinery, and other critical fields where stable operation under harsh working conditions is required.
Chemical Composition Analysis (wt%)
| Alloy Grade |
C |
Mn |
Si |
P |
S |
Cr |
Mo |
Fe |
| ASTM A182 F11 (UNS K11547) |
0.15-0.25 |
0.30-0.60 |
0.50-1.00 |
≤0.035 |
≤0.030 |
1.00-1.50 |
0.45-0.65 |
Balance |
Typical Mechanical Properties
| Mechanical Property |
Standard Requirement (Min.) |
Typical Value |
| Yield Strength (Rp0.2), MPa |
≥345 |
350-430 |
| Tensile Strength (Rm), MPa |
≥585 |
590-690 |
| Elongation (A), % |
≥22 |
23-29 |
| Hardness (HB), Brinell |
≤229 |
185-225 |
| Impact Toughness (KV), J (20℃) |
≥47 |
50-75 |
| Max. Working Temperature |
593℃ (Long-term) |
593℃ |
Available Tests
| Test Type |
Standard |
| Chemical Composition Analysis (PMI) |
Spectrometer (XRF/OES), ASTM E1019 |
| Tensile & Impact Test |
ASTM E8/E8M, ASTM A370, Charpy V-Notch |
| Hardness Test |
ASTM E10 (Brinell), ASTM E18 (Rockwell) |
| Heat Treatment Inspection |
ASTM A182, Metallographic Microstructure Test |
| Hydrostatic/Pneumatic Pressure Test |
ASTM A182, ASME B16.5 |
| Non-Destructive Testing (NDT) |
UT, RT, MT, PT (ASTM E165), Eddy Current Test |
| Hydrogen Embrittlement Test (Optional) |
ASTM F1940, NACE TM0177 |
| Dimensional & Visual Inspection |
ASME B16.5, CMM, Gauge Inspection |
| Material Test Certificate (MTC) |
EN 10204 3.1/3.2 |
Product Application Scope
| Industry Field |
Typical Applications |
| Power Plant Industry |
Boiler steam pipelines, superheater pipelines, high-temperature water pipelines, power generation equipment connections, boiler feedwater systems |
| Petrochemical & Refinery |
Hydrogenation reaction systems, catalytic cracking units, high-temperature oil and gas pipelines, refinery process lines, crude oil distillation equipment |
| Coal Chemical Industry |
Coal gasification pipelines, synthetic ammonia systems, high-temperature and high-pressure reaction equipment connections, coal-to-chemical process lines |
| Industrial Furnace Systems |
High-temperature furnace pipelines, heat exchanger connections, thermal treatment equipment pipelines, industrial boiler auxiliaries |
| Other High-Temp High-Pressure Fields |
Nuclear power auxiliary systems, high-temperature steam turbines, high-pressure boiler auxiliaries, offshore oil and gas platform process lines |
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