Material Name: 60Mn unified digital code: U21602 Material Type: high-quality carbon structural steel standard: GB / T 699-1999
● Features and application examples:
Strength hardness and hardenability elasticity higher than 60, the cutting of annealed can be good, cold plastic deformation and welding of the poor. Heat sensitive and has a tendency to temper brittleness. For large size coil spring. Spring. A variety of round flat springs of spring ring piece, cold-drawn steel wire and spring.

     ● Chemical Composition: C :0.57-0 .65

Si Si :0.17-0 .37

Manganese Mn :0.70-1 .00

Chromium Cr: ≤ 0.25

Ni-Ni: ≤ 0.30

Copper Cu: ≤ 0.25

     ● Mechanical Properties:

Tensile strength σb (MPa): ≥ 695

Yield strength σs (MPa): ≥ 410

Elongation δ5 /(%): ≥ 11

Reduction of ψ /(%): ≥ 35

Delivery status of steel hardness HBS 10/3000: not heat-treated steel, annealed steel ≤ 229 ≤ 269

Recommended heat treatment / ℃ normalizing 810

Sample size: sample blank size / mm: 25