65mn

Manufacturer:ansteel

Standard of execution

  GB/T 1222-2007

Executive stantd:Chinese Standard

Shape:sheet plate&roll

Product use

65Mn spring steel, manganese improves hardenability, φ12mm steel oil can be hardened, surface decarburization tends to be smaller than silicon steel, the comprehensive mechanical properties after heat treatment is better than carbon steel, but there is overheat sensitivity and temper brittleness. Used as small size flat, round spring, cushion spring, spring spring, spring ring, valve spring, clutch reed, brake spring and cold drawn steel coil cold coil spring

Mechanical properties

Tensile strength σ b (Mpa)

Yield strength σs

(Mpa)

Elongation δ5

(%)

Section shrinkage ψ (%)

surface hardness

(HBW)

)

825~925

520~690

14~22.5

≤10

          ≤321

——

825~925

520~690

14~22.5

≤10

≤321   

chemical composition %

element

C

Si

Mn

P

S

Cr

Cu

Ni

mo

content

0.62~0.7

0.17~0.37

0.90~1.20  

≤0.035

≤0.035

≤0.25

≤0.25

≤0.30

——