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ASTM A106 Grade A
keyword ASTM A106 Grade A Category Steel pipe material Related products Get a quoteChemical and mechanical properties of ASTM A106 Grade A spiral steel pipes
1、 Chemical composition
Main elements
Carbon (C): Content ≤ 0.25%, material strength and weldability balance.
Manganese (Mn): content ranging from 0.27% to 0.93%, synergistically strengthens materials with carbon.
Phosphorus (P) and sulfur (S): both ≤ 0.035%, strictly controlled to ensure toughness and reduce cold brittleness.
Other element restrictions
Silicon (Si): content ≥ 0.10%, mainly used for deoxidation and purification of molten steel.
Chromium (Cr), nickel (Ni), copper (Cu): each element ≤ 0.40%, to avoid excessive residual elements affecting processing performance.
2、 Mechanical performance
Intensity index
Tensile strength (Rm): ≥ 330 MPa, meeting the pressure requirements under high temperature and high pressure conditions.
Yield strength (Rp0.2): ≥ 205 MPa, the material maintains stable deformation under stress.
Plasticity and toughness
Elongation rate (A%): ≥ 30% (annealed or normalized state), endowing the material with good impact resistance.
Process performance requirements
Spiral steel pipes need to undergo hydrostatic testing to verify their sealing and pressure bearing capacity.
The welding process must comply with ASTM A53 specifications and undergo non-destructive testing (such as electrical testing) to ensure that the weld seam is defect free.
3、 Application and Supplementary Instructions
Applicable scenarios: Mainly used for transporting high-temperature fluids (such as water vapor, oil, gas), commonly used in fields such as petrochemicals, power, boiler systems, etc.
Standard difference explanation: ASTM A106 standard usually applies to seamless steel pipes, while spiral steel pipes mostly follow welded steel pipe standards such as ASTM A53; If A106 material is used to manufacture spiral steel pipes, specific process specifications must be combined.
Note: The performance of ASTM A106 Grade A spiral steel pipe needs to be comprehensively evaluated based on the seamless steel pipe manufacturing process and actual application scenarios. Some parameters may differ from the welded steel pipe standard.
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