Chromium molybdenum alloy steel
Widely used in shafts, guide columns, bolts, spindle sleeves, rods, dents, steam turbines and other components.
1.Ingredient:
| Steel Grade |
C |
Si |
Mn |
P |
S |
Ni |
Cr |
Mo |
| SCM440 |
0.38-0.43 |
0.15-0.35 |
0.60-0.90 |
<0.030 |
<0.030 |
<0.25 |
0.90-1.20 |
0.15-0.30 |
2.Equivalent steel:
| Equivalent steel |
JIS |
AISI |
DIN |
GB |
| |
SCM440 |
4140 |
42CrMo4 |
42CrMo |
3.Heat treatment:
| Normalization |
Annealing |
Quenching |
Tempering |
| 830-880 |
830 Furnace Cooling |
830-880 Oil Cooling |
530-630 Quick Cooling |
4.Mechanical properties:
| Yielding Strength (kgf/mm²) |
Tensile Strength (kgf/mm²) |
Elongation (%) |
Section reduction (%) |
Charpy |
Hardness (HBW) |
| >85 |
>100 |
12 |
45 |
59 |
285~352 |
5.Origin Place:Taiwan,China,Korea
