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ASTM A202 Grade B is a chromium-manganese-silicon low-alloy steel tailored for high-pressure, medium-temperature pressure vessel applications.2026-04-30
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ASTM A202 Grade A is a critical chromium-manganese-silicon low-alloy steel plate specifically designed for welded pressure vessels and boilers operating at medium temperatures.2026-04-30
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ASTM A202 Pressure Vessel Steel Material and Grades:
Alloy System: **Chromium-Manganese-Silicon (Cr-Mn-Si)** Low-Alloy Heat-Resistant Steel2026-04-17 -
ASTM A204/A204M Grade B molybdenum alloy steel plates for pressure vessels feature superior chemical composition and mechanical properties compared to Grade A2026-04-10
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As a molybdenum-alloy steel plate for pressure vessels under the ASTM A204/A204M standard, A204 Gr.A is a low-alloy, high-strength material specifically designed for service conditions involving moderate temperatures (≤400°C) and moderate-to-high pressure2026-03-31
G4109 SCMV2 steel plate is a medium-temperature hydrogen-resistant steel renowned for its high purity, excellent toughness, and weldability. It is widely utilized in critical applications such as pressure vessels.
Characteristics
High Purity:
G4109 SCMV2 steel plate features exceptional purity, with stringently controlled chemical composition: P ≤ 0.010%, S ≤ 0.005%, [N] ≤ 70 ppm, [O] ≤ 15 ppm, and [H] ≤ 2 ppm. The total inclusion content in the steel is ≤ 20 ppm. This high-purity characteristic ensures consistent performance and reliability.Excellent Toughness and Weldability:
The steel exhibits superior toughness and weldability, minimizing defects such as porosity or cracking during welding. The strength of welded joints approaches that of the base material, meeting the welding requirements for complex structural components.Heat Treatability:
G4109 SCMV2 steel plate can undergo heat treatment processes such as normalizing, quenching, tempering, and quenching-tempering. These treatments significantly enhance the steel's plasticity and impact toughness while reducing anisotropy, enabling it to meet operational demands under various conditions.
Applications
G4109 SCMV2 steel plate is primarily used to manufacture critical equipment such as boiler pressure vessels, with extensive applications in industries including petroleum, chemicals, power plants, and boilers. It is capable of withstanding harsh operating conditions such as hydrogen corrosion and high pressure at medium temperatures, ensuring safe and stable equipment operation.