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Introduction to A387Gr11 steel plate for pressure vessels
A387Gr11 is a chromium-molybdenum alloy steel plate for pressure vessels, which has good high-temperature strength, oxidation resistance and sulfide corrosion resistance. The working environment of this material is harsh, and the working medium is reaction products such as hydrogen, hydrogen sulfide, wax oil, gasoline, diesel, and thermal synthesis gas, as well as raw oil.
Therefore, when using this steel as the main material, the smelting, chemical composition, mechanical properties, metallographic structure and welding process of the steel must be strictly controlled.
A387Gr11 steel plate implements the American standard, and its chemical composition is as follows:
Carbon C: 0.05-0.17
Silicon Si: 0.5-.8
ManganeseMn: 0.4-0.65
Chromium Cr: 1.0-1.5
Molybdenum: 0.45-0.65
Phosphorus P: ≤0.25
Sulfur S: ≤0.035
The mechanical properties of A387Gr11 steel plate are as follows:
Yield strength (MPa): ≥310
Tensile strength (MPa): 515-690
Elongation A%: ≥22
Impact power (J): ≥94
Impact toughness value (J/cm²): ≥118
Hardness (HRB): ≤179
Heat treatment specifications: normalizing + tempering
A387Gr11 steel plate has good comprehensive mechanical properties and corrosion resistance, and can meet the use requirements of high temperature and high pressure vessels.
