ASTM A105 is a widely recognized specification for carbon steel forgings used in high-temperature and high-pressure applications within the oil, gas, and petrochemical industries, as well as in various other industrial sectors. This standard defines the requirements for manufacturing processes, material composition, and mechanical properties of carbon steel forgings, including flanges, fittings, valves, and similar components. ASTM A105-compliant forgings are typically produced through a forging process and can undergo various heat treatment methods such as normalization, annealing, or quenching and tempering, depending on the specific requirements of the application. The chemical composition of ASTM A105 carbon steel typically includes a maximum of 0.35% carbon, along with manganese (0.60 - 1.05%), phosphorus (0.035% max), sulfur (0.040% max), silicon (0.10 - 0.35%), and copper (0.40% max).
Mechanical properties of ASTM A105 forgings include a tensile strength ranging from 70,000 to 95,000 psi, a yield strength between 36,000 and 58,000 psi, a minimum elongation of 22%, and a minimum reduction of area of 30%. The hardness values can fall within the range of 187 to 229 HB or 82 to 95 HRB. The impact strength may vary depending on the specific heat treatment and forging process used.
Property | Specification |
Standard | ASTM A105 |
Material Type | Carbon Steel |
Manufacturing Method | Forging |
Heat Treatment | Normalized, Annealed, or Quenched and Tempered as required |
Chemical Composition | See previous answer for composition details |
Tensile Strength | 70,000 - 95,000 psi |
Yield Strength | 36,000 - 58,000 psi |
Elongation | 22% min |
Reduction of Area | 30% min |
Hardness (Brinell) | 187 - 229 HB |
Hardness (Rockwell B) | 82 - 95 HRB |
Impact Strength | Varies |
Modulus of Elasticity (E) | 29 x 10^6 psi |
Poisson's Ratio (ν) | 0.29 |
Applications | High-temperature and high-pressure piping systems, flanges, fittings, valves, etc. |
ASTM A105 forgings find extensive use in critical piping systems and are known for their excellent performance in environments with elevated temperatures and pressures. They are commonly employed in applications such as flanges, fittings, valves, and other components where the combination of strength, durability, and corrosion resistance is crucial. It is important to refer to the full ASTM A105 specification or consult with manufacturers for precise details, as product variations may exist based on specific requirements and manufacturing processes.
Element | Composition Range (%) |
Carbon (C) | 0.35% max |
Manganese (Mn) | 0.60 - 1.05% |
Phosphorus (P) | 0.035% max |
Sulfur (S) | 0.040% max |
Silicon (Si) | 0.10 - 0.35% |
Copper (Cu) | 0.40% max |
Property | Value |
Tensile Strength | 70,000 - 95,000 psi |
Yield Strength | 36,000 - 58,000 psi |
Elongation | 22% min |
Reduction of Area | 30% min |
Hardness (Brinell) | 187 - 229 HB |
Hardness (Rockwell B) | 82 - 95 HRB |
Impact Strength | Varies |
Modulus of Elasticity (E) | 29 x 10^6 psi |
Poisson's Ratio (ν) | 0.29 |
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