42CrMo4 Alloy Steel Bar Sheet Square

42CrMo4 alloy steel bar sheet square

Material name: Alloy structural steel

Grade: 42CrMo4

Standard: DINENI0083-1-1998

Material property

42CrMo steel is ultra-high strength steel, with high strength and toughness, hardenability is also good, no obvious tempering brittleness, high fatigue limit and resistance to multiple shocks after tempering treatment, low temperature impact toughness is good. The steel is suitable for manufacturing large and medium-sized plastic molds requiring certain strength and toughness. High strength, hardenability, good toughness, small deformation during quenching, high creep strength and lasting strength at high temperature. It is used to manufacture forgings requiring higher strength and larger tempering cross-section than 35CrMo steel, such as large gear for locomotive traction, supercharger transmission gear, pressure vessel gear, rear shaft, connecting rod and spring clamp with great load, and can also be used for drilling pipe joints and fishing tools in oil deep Wells below 2000m, and can be used for bending machine molds.

Physical property

1) Critical point temperature (approximate value) : Ac1=730°C, Ac3=800°C, Ms=310°C.

2) Linear expansion coefficient: temperature 20~100°C/20~200°C/20~300°C /20~ 400°C/20~500°C /20~600°C, linear expansion coefficient: 11.1 x 10 k / 12.1 x 10 k / 12.9 x 10 k / 13.5 * 10 k / 13.9 * 10 k14. 1 x 10 k.

3) elastic modulus, temperature is 20 ° C / 300 ° C / 400 ° C / 500 ° C / 600 ° C, flexible touch 210000 mpa / 185000 mpa / 175000 mpa / 165000 mpa / 15500 ompa

Chemical composition

Carbon C: 0.38 ~ 0.45%

Silicon Si: 0.17 ~ 0.37%

Manganese Mn: 0.50 ~ 0.80%

Sulfur S: Allowable residual content ≤0.035%

P: Allowable residual content ≤0.035%

Chromium Cr: 0.90 ~ 1.20%

Nickel Ni: Allowable residual content ≤0.030%

Copper Cu: Allowable residual content ≤0.030%

Molybdenum Mo: 0.15 ~ 0.25%

Mechanical property

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

Yield strength σs (MPa) : ≥930(95)

Elongation δ5 (%) : ≥12

Section shrinkage (%) : ≥45

Impact power Akv (J) : ≥63

Impact toughness value αkv (J/cm2) : ≥78(8)

Hardness: ≤217HB

FACTORY EQUIPMENT

Application fields

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