ASTM A182 F12 Flange Manufacturer
We are a professional manufacturer of ASTM A182 F12 Weld neck Flange ASME B16.5,We supply full range of high-temperature alloy steel forged flanges for power plants, refineries, and petrochemical industries. Our flanges are precision-forged from F12 Class 1 or Class 2 material, with full compliance to ASME, ASTM, and ANSI standards.
ASTM A182 F12 is a Cr-Mo (Chromium-Molybdenum) alloy steel, designed for high-temperature and high-pressure service in applications such as power plants, refineries, and petrochemical systems. F12 is a Class 1 or Class 2 grade typically used in forged flanges, fittings, valves, and other pressure-containing components.
ASTM A182 Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service
There are 2 classes for F12 grade.ASTM A182 F12 Class 1,ASTM A182 F12 Class 2,
- F12 CL1 has a UNS Designation of K11562.
- F12 CL2 has a UNS Designation of K11564.
Chemical Requirements of A182 F12
| Elements | F12 Class1 | F12 Class2 |
| Carbon | 0.05-0.15 | 0.10-0.20 |
| Manganese | 0.30-0.60 | 0.30-0.60 |
| Phosphorus | 0.045 | 0.040 |
| Sulfur | 0.045 | 0.040 |
| Silicon | Max 0.50 | 0.10-0.60 |
| Chromium | 0.80-1.25 | 0.80-1.25 |
| Molybdenum | 0.44-0.65 | 0.44-0.65 |
A182 F12 Flange Tensile and Hardness Requirements
| Grade Symbol | F12 Class1 | F12 Class2 |
| Tensile Strength,min, ksi [Mpa] | 60[415] | 70[485] |
| Yield Strength, min,ksi [MPa] | 32[220] | 40[275] |
| Elongation in 2 in.[50 mm] or 4D,min, % | 20 | 20 |
| Reduction of Area, min, % | 45 | 30 |
| Brinell HardnessNumber | 121-174 | 143-207 |
ASTM A182 F12 Flange specification
Material: ASTM A182 F12 (Alloy Steel, Cr-Mo)
Class: Class 1 or Class 2
Standards: ASME B16.5, B16.47, MSS-SP-44
Sizes: ½” to 60” (Custom sizes available)
We supply a wide range of forged flanges in ASTM A182 F12 material, including:
- ASTM A182 F12 Weld Neck (WN) Flange
- ASTM A182 F12 Slip-On (SO) Flange
- ASTM A182 F12 Blind (BL) Flange
- Socket Weld (SW) Flange
- Lap Joint (LJ) Flange
- Threaded (TH) Flange
- Long Weld Neck (LWN) Flange
A182 F12 Flanges Heat Treatment Requirements
- Normalize and Temper:
- Austenitizing temperature: 1650∘F(900∘C).
- Cooling media: Air cool (after normalizing).
- Tempering temperature: 1150∘F(620∘C).
Additionally, after hot working, forgings should be cooled to a temperature below 1000∘F(538∘C) before heat treatment to meet the requirements.
| Grade | Required Heat Treatment |
|---|---|
| F12 | Normalized and Tempered OR Annealed |
A182 F12 Weld neck flange Nondestructive Testing (if required by purchaser)
- Visual Inspection: Required
- Ultrasonic Testing (UT): Optional
- Magnetic Particle (MT) or Liquid Penetrant Testing (PT): Optional, for surface crack detection
ASTM A182 F12 weld neck flanges manufactured to ASME B16.5 provide reliable strength, oxidation resistance, and long-term performance in high-temperature pressure systems. With proven performance in refineries and power plants, F12 alloy steel flanges are a trusted choice for critical piping applications.
Looking for a high-performance alloy steel flange for elevated temperature and pressure applications? Our ASTM A182 F12 flanges are engineered to deliver exceptional strength, durability, and corrosion resistance in demanding industrial environments.
