The chemical composition of ASTM A182 F904L typically includes Chromium (Cr) in the range of 19.0% to 23.0%, Nickel (Ni) in the range of 24.0% to 26.0%, Molybdenum (Mo) in the range of 4.0% to 5.0%, Copper (Cu) between 1.0% to 2.0%, and small amounts of other elements such as Silicon (Si), Manganese (Mn), Phosphorus (P), Sulfur (S), Carbon (C), and Nitrogen (N). This composition provides excellent corrosion resistance, especially in harsh and corrosive environments.
ASTM A182 F904L exhibits robust mechanical properties suitable for its intended applications. These properties typically include a minimum Tensile Strength of 70 ksi (483 MPa), a minimum Yield Strength of 30 ksi (207 MPa), a minimum Elongation of 35%, and a maximum Hardness of HRB 95 (Brinell 192 maximum). Additionally, it maintains good impact resistance even at low temperatures, with a specified minimum impact resistance at -20°F (-29°C).ASTM A182 F904L is commonly used in industries and applications where high-temperature and corrosive conditions are prevalent. Its corrosion resistance, especially in environments containing sulfuric acid and other aggressive chemicals, makes it suitable for applications in the chemical processing, petrochemical, and oil and gas industries. It is also utilized in equipment such as valves, pumps, flanges, and fittings for handling corrosive fluids at elevated temperatures.
Specification | ASTM A182 F904L |
Material Type | Stainless Steel Alloy |
Grade | F904L |
Standard | ASTM A182 |
Product Forms | Forged or Rolled Flanges, Forged Fittings, Valves, and Parts |
Chemical Composition (% by Weight) | Chromium (Cr): 19.0 - 23.0%, Nickel (Ni): 24.0 - 26.0%, Molybdenum (Mo): 4.0 - 5.0%, Copper (Cu): 1.0 - 2.0%, Silicon (Si): 0.7 max, Manganese (Mn): 2.0 max, Phosphorus (P): 0.045 max, Sulfur (S): 0.035 max, Carbon (C): 0.020 max, Nitrogen (N): 0.10 max |
Mechanical Properties | Tensile Strength: 70 ksi (483 MPa) minimum, Yield Strength: 30 ksi (207 MPa) minimum, Elongation: 35% minimum, Hardness: HRB 95 (Brinell 192 maximum), Impact Resistance: -20°F (-29°C) |
Heat Treatment | Solution Annealing at 1940-2080°F (1060-1140°C), followed by rapid cooling in water or air |
Applications | High-temperature service, especially in corrosive environments |
ASTM A182 F904L is a specification that covers forged or rolled alloy and stainless steel pipe flanges, forged fittings, valves, and parts designed for high-temperature service. This specification is particularly relevant in applications where corrosion resistance and high-temperature strength are crucial. F904L is a specific grade within the A182 specification, characterized by its unique chemical composition and mechanical properties.
Element | Composition Range (% by Weight) |
Chromium (Cr) | 19.0 - 23.0 |
Nickel (Ni) | 24.0 - 26.0 |
Molybdenum (Mo) | 4.0 - 5.0 |
Copper (Cu) | 1.0 - 2.0 |
Silicon (Si) | 0.7 max |
Manganese (Mn) | 2.0 max |
Phosphorus (P) | 0.045 max |
Sulfur (S) | 0.035 max |
Carbon (C) | 0.020 max |
Nitrogen (N) | 0.10 max |
Property | Value |
Tensile Strength | 70 ksi (483 MPa) minimum |
Yield Strength | 30 ksi (207 MPa) minimum |
Elongation | 35% minimum |
Hardness | HRB 95 (Brinell 192 maximum) |
Impact Resistance | -20°F (-29°C) |
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