65Mn Spring Steels

65Mn spring steels

65Mn spring steel, manganese to improve the hardenability, φ12mm steel oil can be quenched through, the surface decarburization tendency is smaller than silicon steel, after heat treatment of the comprehensive mechanical properties are better than carbon steel, but there is overheating sensitivity and temper brittleness. Used as a small size of various flat, round spring, cushion spring, spring spring, can also make spring ring, valve spring, clutch spring, brake spring and cold drawn wire cold coil spring.

● Chemical composition:

Carbon C: 0.62 ~ 0.70

Silicon Si: 0.17 ~ 0.37

Manganese Mn: 0.90 ~ 1.20

Sulfur S: ≤0.035

P: ≤0.035

Chromium Cr: ≤0.25

Nickel Ni: ≤0.25

Copper Cu: ≤0.25

Production technology