Chemical composition and mechanical properties of 15Mn seamless steel pipe

Hit：62026-03-13 16:17:26　

Chemical composition and mechanical properties of 15Mn seamless steel pipe
Mechanical properties (untreated state)
Tensile strength (σ b): ≥ 410 MPa
Yield strength (σ s): ≥ 245 MPa
Elongation rate (δ 5): ≥ 26%
Sectional shrinkage rate: ≥ 55%
Hardness: ≤ 163 HB (Brinell hardness)
one
three
Additional notes
15Mn belongs to high manganese low-carbon carburizing steel, with better hardenability, strength, and plasticity than 15 steel.
Has good welding performance, but has a tendency towards temper brittleness.
Suitable for manufacturing wear-resistant parts that require carburizing treatment, such as gears, shafts, bolts, piston pins, etc
Chemical composition (mass fraction,%)
Carbon (C): 0.12%~0.18%
Silicon (Si): 0.17%~0.37%
Manganese (Mn): 0.70%~1.00%
Sulfur (S): ≤ 0.035%
Phosphorus (P): ≤ 0.035%
Chromium (Cr), nickel (Ni), copper (Cu): all ≤ 0.30% (residual content)
According to the latest public information, the chemical composition and mechanical properties of 15Mn seamless steel pipes are mainly determined based on the national standards GB/T 699-2015 "High quality Carbon Structural Steel" and GB/T 3078-2019 "High quality Carbon Structural Steel Seamless Steel Pipes".