Material Name: 5160 Spring Steel
Standard: ASTM A29 / A29M-04
● Features and Scope:
High strength, ductility and toughness, hardenability better thermal sensitivity is lower than steel, higher than silico-manganese steel, silico-manganese steel decarburization tendency smaller than, temper brittleness. For vehicles, tractors industrial production load is heavy, stress is large leaf springs and larger diameter coil spring.
● Chemical Composition:
Carbon C: 0.56 ~ 0.61
Si Si: 0.15 ~ 0.35
Mn Mn: 0.75 ~ 1.00
Sulfur S: ≤0.040
Phosphorus P: ≤0.035
Chromium Cr: 0.70 ~ 0.90
Ni Ni: ≤0.35
Copper Cu: ≤0.25
● Mechanical Properties:
Tensile strength σb (MPa): ≥1225 (125)
Conditions yield strength σ0.2 (MPa): ≥1078 (110)
Elongation δ5 (%): ≥9 (for reference)
Reduction of ψ (%): ≥20
Hardness: hot, ≤321HB; Cold Drawn + heat, ≤321HB
● Heat treatment and microstructure specifications:
Heat treatment specifications: quenching 830 ~ 860 ℃, oil cooling; tempering 460 ~ 520 ℃.
● Delivery status: hot-rolled steel to heat treatment or heat treatment delivery, cold drawn steel to heat treatment delivery.