12Cr2Ni4

Standard: GB / T 3077-1988

● Features and application:

High strength, good toughness, good hardenability, carburizing the surface layer hardness and wear resistance is good, cold deformation

Plastic, cutting is still good, but there are white spots and sensitive temper brittleness, poor welding. Used for high load,

Working under alternating stress large carburized parts, such as by a variety of high-load gear, worm gear, worm, shaft and so on mechanical

Structural parts.

● Chemical Composition:

Carbon C: 0.10 ~ 0.16

Si Si: 0.17 ~ 0.37

Manganese Mn: 0.30 ~ 0.60

Sulfur S: to allow the residual content of ≤ 0.035

Phosphorus P: allow the residual content ≤ 0.035

Chromium Cr: 1.25 ~ 1.65

Ni-Ni: 3.25 ~ 3.65

Copper Cu: to allow the residual content ≤ 0.030

   12Cr2Ni4

● Mechanical Properties:

Tensile strength σb (MPa): ≥ 1080 (110)

Yield strength σs (MPa): ≥ 835 (85)

Elongation δ5 (%): ≥ 10

Reduction of area ψ (%): ≥ 50

Impact energy Akv (J): ≥ 71

Impact toughness αkv (J/cm2): ≥ 88 (9)

Hardness: ≤ 269HB

Sample size: Sample size is 15mm rough