42Cr4Mo2 is a high performance alloy structural steel with high strength, high hardenability and good toughness.
Below, we will introduce India IS 42Cr4Mo2 steel from the aspects of chemical composition, mechanical properties, physical properties and heat treatment.
Datasheet for Metals 42Cr4Mo2:
Category |
Grade |
Standard |
Region/Area |
Standard Content |
Metals |
42Cr4Mo2 |
IS 3930 |
India |
Flame and induction hardening steels |
Chemical Composition (mass fraction)(wt.%) of the 42Cr4Mo2
Element |
Min |
Max |
Si |
0.1000 |
0.3500 |
Mo |
0.1500 |
0.3000 |
Mn |
0.6000 |
0.9000 |
Cr |
0.9000 |
1.2000 |
C |
0.3800 |
0.4500 |
S |
- |
0.0350 |
P |
- |
0.0350 |
Mechanical Properties of steel grade 42Cr4Mo2
Yield
Rp0.2
(MPa) |
Tensile
.Rm
(MPa) |
Impact
KV/Ku
(J) |
Elongation
A(%) |
Reduction in cross section on fracture Z(%) |
As-Heat-Treated Condition |
Brinell
hardness
(HBW) |
≥246 |
≥359 |
13 |
42 |
12 |
Solution and Aging, Annealing, Ausaging, Q+T,etc |
311 |
Physical Properties of steel grade 42Cr4Mo2
Temperature (℃) |
Modulus of elasticity (GPa) |
Mean coefficient
of thermal expansion 10-6/(℃) between 20(℃)and |
Thermal conductivity
(W/m.℃) |
Specific thermal capacity (J/kg.℃) |
Specific electrical resistivity (Ωmm2/m) |
Density (kg/dm3) |
Poisson's coefficient, v |
34 |
- |
- |
|
|
0.33 |
- |
|
198 |
244 |
- |
12.3 |
112 |
|
- |
|
543 |
- |
23 |
41.2 |
|
|
143 |
423 |
Heat Treatment of steel grade 42Cr4Mo2
Heat treated : 1935°C-1487°C |
