4140 Steel Grade Equivalent Chart
| Country |
USA |
Germany/UK/France |
JAPAN |
| Standard |
ASTM A29 / A29M-05 |
EN 10083/3-2006 |
JIS G4053-2008 |
| Grades |
4140 |
42CrMo4(1.7225) |
SCM440 |
4140 Steel Chemical Composition
| Grade |
C (%) |
Si (%) |
Mn(%) |
P (%) |
S (%) |
Cr (%) |
Mo (%) |
| 4140 |
0.38-0.45 |
0.17-0.37 |
0.50-0.80 |
≤0.035 |
≤0.035 |
0.90-1.20 |
0.15-0.25 |
4140 Steel Physical Properties
| Properties |
Metric |
Imperial |
| Density |
7.85 g/cm³ |
0.284 lb/in³ |
| Melting point |
1416°C |
2580°F |
1.7225 Steel Mechanical Properties
| Mechanical Properties |
Metric |
Imperial |
| Tensile strength |
655 MPa |
95000 psi |
| Yield strength |
415 MPa |
60200 psi |
| Bulk modulus(typical for steel) |
140 GPa |
20300 ksi |
| Shear modulus(typical for steel) |
80 GPa |
11600 ksi |
| Elastic modulus |
190-210 GPa |
27557-30458 ksi |
| Poisson’s ratio |
0.27-0.30 |
0.27-0.30 |
| Elongation at break(in 50 mm) |
25.70% |
25.70% |
| Hardness, Brinell |
197 |
197 |
| Hardness, Knoop(converted from Brinell hardness) |
219 |
219 |
| Hardness, Rockwell B(converted from Brinell hardness) |
92 |
92 |
| Hardness, Rockwell C(converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) |
13 |
13 |
| Hardness, Vickers(converted from Brinell hardness) |
207 |
207 |
| Machinability(based on AISI 1212 as 100 machinability) |
65 |
65 |
4140 Steel Quality Certificate & SGS Report
About Songshun Steel
Dongguan Songshun Mould Steel co., LTD which is an industrial and trading company with 3500-7000ts hydraulic forging machine. We provide a great variety of steels, competitive price with good quality and keep the large stock are over 20000 tons.
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