AISI 4140 steel VS 4130 Steel chemical composition
| C | Si | Mn | S | P | Cr | Mo | |
| AISI 4140 | 0.38～0.43 | 0.15～0.35 | 0.75～1.00 | ≤0.035 | ≤0.040 | 0.80～1.10 | 0.15～0.25 |
| AISI 4130 | 0.28～0.33 | 0.15～0.35 | 0.40～0.60 | ≤0.035 | ≤0.040 | 0.80～1.10 | 0.15～0.25 |
By comparing the Chemical Composition of Alloy Steel AISI 4140 and 4130, we can know some 4140 and 4130 Chemical properties and physical properties have what different point.
sae 4140 steel VS 4130 Steel welding properties
4130 have lower Carbon composition, so 4130 is easier welding than AISI 4140 steel. And 4130 have lower Manganese than 4140. So 4130’s Wear-resisting performance is lower than 4140.
sae 4140 VS 4130 Steel Rust resistance properties
4140 steel have higher carbon, but sae 4140 have higher Mn composition. so their rust is very same.
AISI 4140 VS 4130 Steel mechanical behavior (mechanical properties)
The mechanical properties of AISI 4140 steel VS 4130 Steel are outlined in the following table.
| AISI SAE 4140 Steel | AISI SAE 4130 Steel | ||
| Properties (behavior) | Metric | Properties (behavior) | Metric |
| Tensile strength, Ultimate | 655 MPa | Tensile strength, Ultimate | 560 MPa |
| Tensile strength, Yield | 415 MPa | Tensile strength, Yield | 460 MPa |
| Modulus of elasticity | 190-210 MPa | Modulus of elasticity | 190-210 MPa |
| Bulk modulus | 140 GPa | Bulk modulus | 140 GPa |
| Shear modulus | 80 GPa | Shear modulus | 80 GPa |
| Poisson ratio | 0.27-0.30 | Poisson ratio | 0.27-0.30 |
| Elongation at break (in 50 mm) | 25.7 % | Elongation at break (in 50 mm) | 21.5% |
| Reduction of area | 45 | Reduction of area | 59.6 |
| Hardness, Brinell (Annealing) | 217 Max | Hardness, Brinell (Annealing) | 217 Max |
| Hardness, Rockwell C (Q+T) | 22 | Hardness, Rockwell C (Q+T) | 22 |
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