Properties
| SAE grade | % Cr | % Mo | % C * | % Mn | % P (max) | % S (max) | % Si |
|---|---|---|---|---|---|---|---|
| 4118 | 0.40–0.60 | 0.08–0.15 | 0.18–0.23 | 0.70–0.90 | 0.035 | 0.040 | 0.15–0.35 |
| 4120 | 0.40–0.60 | 0.13–0.20 | 0.18–0.23 | 0.90–1.20 | 0.035 | 0.040 | 0.15–0.35 |
| 4121 | 0.45–0.65 | 0.20–0.30 | 0.18–0.23 | 0.75–1.00 | 0.035 | 0.040 | 0.15–0.35 |
| 4130 | 0.80–1.10 | 0.15–0.25 | 0.28–0.33 | 0.40–0.60 | 0.035 | 0.040 | 0.15–0.35 |
| 4135 | 0.80–1.10 | 0.15–0.25 | 0.33–0.38 | 0.70–0.90 | 0.035 | 0.040 | 0.15–0.35 |
| 4137 | 0.80–1.10 | 0.15–0.25 | 0.35–0.40 | 0.70–0.90 | 0.035 | 0.040 | 0.15–0.35 |
| 4140 | 0.80–1.10 | 0.15–0.25 | 0.38–0.43 | 0.75–1.00 | 0.035 | 0.040 | 0.15–0.35 |
| 4142 | 0.80–1.10 | 0.15–0.25 | 0.40–0.45 | 0.75–1.00 | 0.035 | 0.040 | 0.15–0.35 |
| 4145 | 0.80–1.10 | 0.15–0.25 | 0.43–0.48 | 0.75–1.00 | 0.035 | 0.040 | 0.15–0.35 |
| 4147 | 0.80–1.10 | 0.15–0.25 | 0.45–0.50 | 0.75–1.00 | 0.035 | 0.040 | 0.15–0.35 |
| 4150 | 0.80–1.10 | 0.15–0.25 | 0.48–0.53 | 0.75–1.00 | 0.035 | 0.040 | 0.15–0.35 |
| 4161 | 0.70–0.90 | 0.25–0.35 | 0.56–0.64 | 0.75–1.00 | 0.035 | 0.040 | 0.15–0.35 |
| * The carbon composition of the alloy is denoted by the last two digits of the SAE specification number, in hundredths of a percent | |||||||
| Material | Condition | Tensile strength | Yield strength | Elongation in 2" | Hardness (Rockwell) |
|---|---|---|---|---|---|
| 4130 | Cold drawn—normalized | 85,000–110,000 psi (590–760 MPa) | 70,000–85,000 psi (480–590 MPa) | 20–30 | B 90–96 |
| 4142 | Hot rolled—annealed | 90,000–100,000 psi (620–690 MPa) | 60,000–70,000 psi (410–480 MPa) | 20–30 | B 90–95 |
| Cold drawn—annealed | 105,000–120,000 psi (720–830 MPa) | 85,000–95,000 psi (590–660 MPa) | 15–25 | B 96–100 | |
| 4150 | Hot rolled—annealed | 90,000–110,000 psi (620–760 MPa) | 65,000–75,000 psi (450–520 MPa) | 20–30 | B 90–96 |
Read more about this topic: 41xx Steel
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