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ASTM A203/A203M nickel alloy steel plates are widely used in the manufacture of pressure vessels and low-temperature equipment.2026-05-09
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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
Characteristics of G4109 SCMV4 Steel Plate
Mechanical Properties
High-Temperature Strength: Maintains high yield strength (≥250 MPa) and tensile strength (430–630 MPa) at temperatures of 500–600°C, making it suitable for long-term high-temperature service applications.
Toughness: Exhibits an elongation of ≥25% and high reduction of area, ensuring excellent impact resistance.
Hardness: Achieves uniform hardness through quenching and tempering (heat treatment), balancing strength and ductility.
Welding and Fabrication Performance
Weldability: The low carbon content and titanium (Ti) microalloying design significantly reduce the tendency for embrittlement in the heat-affected zone (HAZ), allowing performance retention without post-weld heat treatment.
Fabricability: Can be processed via cold forming, cutting, bending, and other techniques, accommodating complex structural manufacturing.
Surface Quality: The steel plate features a smooth surface free from cracks, slag inclusions, and other defects, facilitating subsequent coating or corrosion protection treatments.
Corrosion Resistance
Oxidation Resistance: Chromium forms a dense oxide film on the surface, effectively resisting high-temperature oxidation and hot corrosion.
Sulfur Corrosion Resistance: Molybdenum enhances the material's corrosion resistance in sulfur-containing environments, making it suitable for industrial chimneys, exhaust gas treatment, and similar applications.
Steam Corrosion Resistance: The oxide film can self-repair in humid or steam-laden environments, extending service life.