60Si2MnA spring steel
Properties and Applications
60si2mna strength hardness and elasticity hardenability steel is higher than 65, with a thermal sensitivity and tendency to temper brittleness, water quenching have to cracking tendencies. Cutting can still be annealed, cold plastic deformation is low, poor welding. By the middle of the plate spring load, diameter 7-20mm of coil spring and spring washer. Spring ring. High wear parts, such as grinding spindle of spring chuck. Precision machine screw. Cutter, spiral roller bearings on the rings. Railway rail and so on. [1]
60Si2MnA low content of alloying elements, than 60Si2Mn high hardenability, toughness, ductility and higher, a small tendency to decarburization, tempering good stability, thermal processing performance and low cost. 60si2mna spring steel, manganese improve hardenability, φ12mm the hardenability of steel oil can, a small surface decarburization tendency than silicon, the mechanical properties after heat treatment is better than carbon steel, but there are overheating and temper embrittlement susceptibility
. 60Si2MnA production instead of heavy, medium and small cars, and other medium-sized cross-section of leaf spring leaf spring and coil spring. 60si2mna strength hardness and elasticity hardenability steel is higher than 65, with a thermal sensitivity and tendency to temper brittleness, water quenching have to cracking tendencies. Cutting can still be annealed, cold plastic deformation is low, poor welding. By the middle of the plate spring load, diameter 7-20mm of coil spring and spring washer. Spring ring. High wear parts, such as grinding spindle of spring chuck. Precision machine screw. Cutter, spiral roller bearings on the rings. Railway rail and so on.
Chemical composition
Carbon C: 0.52 ~ 0.60
Si Si: 1.5 ~ 2.0
Manganese Mn: 1.00 ~ 1.30
Sulfur S: ≤ 0.035
Phosphorus P: ≤ 0.035
Chromium Cr: ≤ 0.35
Ni-Ni: ≤ 0.35
Copper Cu: ≤ 0.25
Vanadium V: 0.08 ~ 0.16
Boron B: 0.0005 ~ 0.0035
Mechanical properties
Tensile strength σb (MPa): ≥ 1372 (140)
Yield strength σs (MPa): ≥ 1225 (125)
Elongation δ10 (%): ≥ 5
Reduction of area ψ (%): ≥ 30
Hardness: hot, ≤ 321HB; cold-drawn + heat treatment, ≤ 321HB
