ASME SA105 is a specification that falls under the ASME Boiler and Pressure Vessel Code, specifically within Section II, Part A. It pertains to carbon steel forgings used in various industrial applications, particularly those involving high-temperature and high-pressure conditions. This specification outlines the requirements for the manufacturing and use of carbon steel forgings, which are commonly employed in the construction of pressure vessels, flanges, fittings, valves, and other components essential for the integrity and safety of industrial processes.
ASME SA105 carbon steel forgings are available in a size range that typically spans from 1/2 inch to 56 inches in diameter, making them suitable for a wide range of applications across various industries. The material undergoes specific heat treatment processes, including normalizing and tempering or annealing, to achieve the desired mechanical properties. The chemical composition of ASME SA105 carbon steel includes carbon, manganese, phosphorus, sulfur, silicon, copper, nickel, chromium, and molybdenum, with specific percentage ranges to ensure the desired material properties. These properties include a tensile strength ranging from 485 to 620 MPa, a yield strength of 250 MPa (0.2% offset), and an elongation of approximately 22% in a 50 mm gauge length. The material has a Brinell hardness of 187 and a modulus of elasticity of 200 GPa, with a Poisson's ratio of 0.29.
Specification Name | ASME SA105 |
Material Grade | Carbon Steel |
Standard | ASME Boiler and Pressure Vessel Code, Section II, Part A |
Type | Forgings |
Size Range | 1/2" to 56" |
Heat Treatment | Normalize and temper or anneal |
Chemical Composition | See previous table |
Tensile Strength | 485 - 620 MPa (70,300 - 89,900 psi) |
Yield Strength (0.2% offset) | 250 MPa (36,300 psi) |
Elongation | 22% (in 50 mm) |
Hardness (Brinell) | 187 |
Modulus of Elasticity | 200 GPa (29,000,000 psi) |
Poisson's Ratio | 0.29 |
Applications | Pressure vessels, flanges, fittings, valves, and other high-temperature service applications |
Compliance | ASTM A105, ASME B16.5, ASME B16.47, ASME B16.11, ASME B16.36, ASME B16.1, ASME B31.1, ASME B31.3, ASME B31.4, ASME B31.8 |
ASME SA105 carbon steel is widely utilized in critical applications where strength, durability, and resistance to high temperatures and pressures are essential. It complies with various other industry standards and codes, such as ASTM A105, ASME B16.5, ASME B16.47, ASME B16.11, ASME B16.36, ASME B16.1, ASME B31.1, ASME B31.3, and ASME B31.4, ensuring its compatibility and reliability in diverse engineering projects. For precise and application-specific requirements, it is essential to consult the relevant ASME codes and standards and refer to the material's datasheet or the manufacturer's documentation.
Element | Composition (% by weight) |
Carbon (C) | 0.35 - 0.55 |
Manganese (Mn) | 0.60 - 1.05 |
Phosphorus (P) | 0.040 (max) |
Sulfur (S) | 0.050 (max) |
Silicon (Si) | 0.10 - 0.35 |
Copper (Cu) | 0.40 (max) |
Nickel (Ni) | 0.40 (max) |
Chromium (Cr) | 0.30 (max) |
Molybdenum (Mo) | 0.12 (max) |
Property | Value |
Tensile Strength | 485 - 620 MPa (70,300 - 89,900 psi) |
Yield Strength (0.2% offset) | 250 MPa (36,300 psi) |
Elongation | 22% (in 50 mm) |
Hardness (Brinell) | 187 |
Modulus of Elasticity | 200 GPa (29,000,000 psi) |
Poisson's Ratio | 0.29 |
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