Chemical Requirements
Steel grade | C max | Mn | P max | S max | Si max | Cr max | Mo |
1045 | 0.45-0.50 | 0.60-0.90 | 0.04 | 0.05 | | | |
4130 | 0.28-0.33 | 0.40-0.60 | 0.04 | 0.04 | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 |
4140 | 0.38-0.43 | 0.75-1.00 | 0.04 | 0.04 | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 |
Mechanical properties
Steel Grade | Tensile Strength, min | Yield Strength, min | Enlongation %, min | Rockwell Hardness B Scale |
1045 HR | 75 ksi 517Mpa | 45ksi 310Mpa | 15% | 80 |
1045CW | 90ksi 621Mpa | 80ksi 552Mpa | 5% | 90 |
1045SR | 80ksi 552Mpa | 70ksi 483Mpa | 8% | 85 |
1045A | 65ksi 448Mpa | 35ksi 241Mpa | 20% | 72 |
1045N | 75ksi 517Mpa | 48ksi 331Mpa | 15% | 80 |
4130 HR | 90ksi 621Mpa | 70ksi 483Mpa | 20% | 92 |
4130 SR | 105ksi 724Mpa | 85ksi 586Mpa | 10% | 95 |
4130A | 75ksi 517Mpa | 55ksi 379Mpa | 30% | 81 |
4130N | 90ksi 621Mpa | 60ksi 414Mpa | 20% | 89 |
4140 HR | 120ksi 855Mpa | 90ksi 310Mpa | 15% | 100 |
4140 SR | 120ksi 855Mpa | 100ksi 689Mpa | 10% | 100 |
4140 A | 80ksi 552Mpa | 60ksi 414Mpa | 25% | 85 |
4140 N | 120ksi 855Mpa | 90ksi 621Mpa | 20% | 100 |