15CrMo steel is a heat-resistant steel with pearlite structure, which has high thermal strength (δb≥440MPa) and oxidation resistance at high temperatures, and has a certain resistance to hydrogen corrosion. Due to the high content of Cr, C and other alloying elements in steel, the hardening tendency of steel is obvious and the weldability is poor.
The following are the chemical composition and properties of GBT 15CrMo steel:
Chemical Composition (wt%):
Carbon (C): 0.12-0.18%
Silicon (Si): 0.17-0.37%
Manganese (Mn): 0.40-0.70%
Phosphorus (P): ≤0.035%
Sulfur (S): ≤0.035%
Chromium (Cr): 0.80-1.10%
Molybdenum (Mo): 0.40-0.55%
Properties:
Density: 7.85 g/cm³
Melting Point: 1420-1460°C
Yield Strength: ≥295 MPa
Tensile Strength: 440-640 MPa
Elongation: ≥23%
Hardness: ≤217 HB
Impact Energy: ≥31J (at 20°C)
GBT 15CrMo is a low-alloy steel commonly used in the manufacturing of various structural components, such as pressure vessels, boilers, and pipelines, especially in high-temperature and high-pressure environments. It exhibits good mechanical properties, including high tensile strength, good impact resistance, and excellent hardenability.
It's important to note that variations in specific chemical composition and mechanical properties may exist depending on the exact manufacturing process, heat treatment, and product forms. Therefore, it is advisable to consult the relevant standard or specification (such as GB/T 3077-2015) or contact the manufacturer for precise information regarding GBT 15CrMo steel properties for a given application.
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