Higher strength, plasticity and toughness, better hardenability, heat sensitivity than manganese steel low, higher than silicon manganese steel, decarbonization tendency than silicon manganese steel small, tempering brittleness.
55CrMn Chemical composition:
Carbon C: 0.52 ~ 0.60
Si: 0.17 ~ 0.37
Manganese: 0.65 ~ 0.95
S: sulfur 0.020 or less
P P: 0.025 or less
Chromium Cr: 0.65 ~ 0.95
Ni Ni: 0.35 or less
Copper Cu: 0.25 or less
Mechanical properties of 55CrMn:
Tensile strength σ B (MPa) : ≥1225
Conditional yield strength σ0.2 (MPa) : ≥1080
Elongation δ5 (%) : ≥9
Section shrinkage ψ (%) : ≥20
Hardness: hot rolling,≤321HB; Cold drawing + heat treatment,≤321HB
55CrMn heat treatment specification:
Heat treatment specification: quenched 840℃, oil cooled; Tempering 485 ℃.
Hot Tags: 55crmn spring steel, China, suppliers, manufacturers, factory, buy, price, pricelist, for sale, in stock, free sample
