Hebei Lufeng Piping Equipment Co., Ltd.
Carbon /Alloy steel pipes, ERW steel pipes, API 5L LSAW&SSAW, ASME B16.9/MSS SP-75 BW pipe fittings, ASME B16.5/16.47 steel flanges, ASME B16.11/MSS SP-97 forged fittings, Knife gate valves, Butterfly
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ASTM A182 – Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service
Grade: F51 Ferritic-Austenitic Stainless Steel
Chemical Requirements max, %
| Elements | F51 (S31803) |
| Carbon | 0.030 |
| Manganese | 2.00 |
| Phosphorus | 0.030 |
| Sulfur | 0.020 |
| Silicon | 1.00 |
| Nickel | 4.5-6.5 |
| Chromium | 21.0-23.0 |
| Molybdenum | 2.5-3.5 |
| Nitrogen | 0.08-0.20 |
Tensile and Hardness Requirements
| Grade Symbol | F51 (S31803) |
| Tensile Strength,min, ksi [Mpa] | 90[620] |
| Yield Strength, min,ksi [MPa] | 65[450] |
| Elongation in 2 in.[50 mm] or 4D,min, % | 25 |
| Reduction of Area, min, % | 45 |
| Brinell HardnessNumber | … |