42CrMo SAE4140 SCM440 1.7225 Alloy Steel Round Bar For Auto Parts
Similar Standards
| Chinese |
American |
German |
Japanese |
British |
| GB |
AISI |
DIN |
JIS |
BS |
| 42CrMo |
SAE4140 |
1.7225 |
SCM440 |
EN19 |
Chemical Composition
| Grades |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Cu |
Ni |
| 4140 |
0.38-0.45 |
0.17-0.37 |
0.5-0.8 |
≤0.035 |
≤0.035 |
0.9-1.2 |
0.15-0.25 |
≤0.3 |
≤0.035 |
| 42CrMo |
0.38-0.45 |
0.17-0.35 |
0.5-0.8 |
≤0.035 |
≤0.035 |
0.9-1.2 |
0.15-0.25 |
≤0.03 |
≤0.03 |
| 440 |
0.38-0.43 |
0.15-0.35 |
0.6-0.85 |
≤0.03 |
≤0.03 |
0.9-1.2 |
0.15-0.3 |
≤0.3 |
≤0.25 |
Heat Treatment
| Quenching |
Tempering |
| Heating Temperature/ºC |
Cooling |
Hardness/HRC |
Heating Temperature/ºC |
Cooling |
Hardness/HRC |
| 820-840 |
Oil |
≥53 |
450-650 |
Air |
25-40 |
Applications
Suitable for manufacturing requirment a certain strength and toughness of large and medium-sized plastic mold, such as locomotive traction with the big gear, the supercharger drive gear, pressure vessle, rear axle, gear load connecting rod and a spring clip
Used to under 2000m deep well of oil drill pipe joint and the fishing tool
Used for bending machine mould
Stock Size
| Plate |
Thickness |
20-120mm |
| Width |
2200mm |
| Length |
4000-10000mm |
| round bar |
Diameter |
16-450mm |
| Length |
4000-10000mm |
Features
- Belong to the ultra-high strength steel
- 2. High strength and toughness
- 3. Good hardenability
Product Introduction
1.7225 classify in the group of low alloy which provide high strength through combination of Chromium and Molybdinum.
This result in impact resistance at low temperature.Selling condition is quenched and tempered.
Its convenience for further surface hardening in order to enhance surface hardness. Caution is it is not suitable to use at temperature higher than 480c
since hardness will sharply fall. Besides, usage or tempering at level 230-270c might cause condition of blue brittleness which will decrease its strength.
42CrMo steel is an ultra-high strength steel with high strength and toughness, good hardenability, no obvious temper
brittleness, high fatigue limit and multiple impact resistance after quenching and tempering, and good low temperature impact toughness.
Our steel materials are in different sizes and conditions specially catered to our customers' needs. They come in round bars, flat bars, plates and block.
The conditions of the materials vary from pre-hardened, hot rolled,annealed, quenched and tempered to surface conditions such as black, pre-machined,griding and polish.
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