Material Properties & Chemical Composition Of SAE4130 Chrome Steel
AISI 4130 steel (UNS G41300), also known as 4130 Chromoly steel, is a chrome-molybdenum series low alloy steel with high strength, toughness and hardenability, usually used in quenched and tempered condition.
Datasheet & Specification
Below is material AISI 4130 Chromoly steel datasheet including chemical composition, density, thermal expansion coefficient, thermal conductivity, yield strength, hardness, etc.
AISI SAE 4130 Chemical Composition
The table below lists AISI 4130 chemical composition.
| AISI 4130 Chemical Composition (%) | |||||||
| Steel Grade (UNS) | C | Si | Mn | P (≤) | S (≤) | Cr | Mo |
| 4130 (G41300) | 0.28-0.33 | 0.15-0.35 | 0.40-0.60 | 0.035 | 0.040 | 0.80-1.10 | 0.15-0.25 |
AISI 4130 Material Properties
Material AISI 4130 steel mechanical properties are given in the table below.
| Steel (UNS) | Tensile strength (Mpa) | Yield strength (Mpa) | Elongation in 50 mm, % | Reduction in area, % | Hardness (HB) | Sample diameter | Conditions |
| AISI 4130 (G41300) | 670 | 435 | 25.5 | 59.5 | 197 | 25mm (1 inch) | Normalized at 870 °C (1600 °F) |
| 560 | 460 | 21.5 | 59.5 | 217 | Annealed at 865 °C (1585 °F) | ||
| 1040 | 979 | 18.1 | 63.9 | 302 | Water quenched from 855 °C (1575 °F) & tempered at 540 °C (1000 °F) |
SAE 4130 Steel Heat Treatment
The following table shows alloy 4130 chromoly steel heat treatment and rockwell hardness.
| Chromoly 4130 Steel Heat Treatment | |||
| 4130 Heat Treat | Temperature (℃) | Hardness | Cooling/Agent |
| Normalizing | 885 | 197 HB | Air |
| Annealing | 865 | 156 HB | Furnace cooling |
| Quenching | 800-855 | Water | |
| Tempering (2 hour) | 204 | 47 HRC | Water hardening |
| 260 | 45 HRC | ||
| 315 | 43 HRC | ||
| 370 | 42 HRC | ||
| 425 | 38 HRC | ||
| 480 | 34 HRC | ||
| 540 | 32 HRC | ||
| 595 | 26 HRC | ||
| 649 | 22 HRC | ||