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ASTM A333 Grade 1
keyword ASTM A333 Grade 1 Category Steel pipe material Related products Get a quoteChemical and mechanical properties of ASTM A333 Grade 1 spiral steel pipes
1、 Chemical composition
Main elements
Carbon (C): ≤ 0.30%, toughness and weldability at low temperatures.
Manganese (Mn): 0.40%~1.06%, synergistically enhances strength and optimizes low-temperature performance with carbon.
Phosphorus (P) and sulfur (S): ≤ 0.025% and ≤ 0.045% respectively, strictly controlled to reduce the risk of cold brittleness and hot brittleness.
Other element restrictions
Chromium (Cr) and nickel (Ni): not specifically limited, but must comply with the total amount control requirements for residual elements in ASTM A333 standard.
2、 Mechanical performance
Strength and plasticity
Tensile strength (Rm): ≥ 380 MPa, meeting the pressure requirements of low-temperature pipeline systems.
Yield strength (Rp0.2): ≥ 205 MPa, material stability at low temperatures.
Elongation rate (A%): ≥ 35% (annealed or normalized state), endowing excellent impact toughness.
Low temperature performance
Suitable for low temperature environments ranging from -45 ℃ to 195 ℃, especially performing well in pressure vessels and heat exchanger pipelines.
3、 Manufacturing and process requirements
Processing technology
Spiral steel pipes adopt hot-rolled coil spiral forming welding technology, which must comply with the specifications of ASTM A333 for welded pipes.
Welds must undergo non-destructive testing (such as radiographic testing) and hydrostatic testing to ensure defect free and leak tight performance.
Heat treatment
Some processes require normalizing treatment to refine grain size and improve low-temperature toughness.
4、 Application scenarios
Low temperature fluid transportation: such as liquefied natural gas (LNG), liquid nitrogen and other media.
Pressure vessel pipeline: suitable for low-temperature pressure systems in chemical, petroleum and other fields.
Note: The performance of ASTM A333 Grade 1 spiral steel pipes needs to be comprehensively evaluated based on welding processes and non-destructive testing requirements. In practical applications, ASTM standards and supporting specifications should be followed.
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