GB/T 3077 42CrMo steel plate belongs to ultra-high strength steel with high strength and toughness, hardenability is also good, no significant temper brittleness. GB/T 3077 42CrMo steel plate has higher fatigue limit and resistance to multiple impact ability, low temperature impact toughness good. GB/T 3077 42CrMo steel plate is suitable for the manufacture of a certain strength and toughness of large and medium-sized plastic mold.
Rolling Size of GB/T 3077 42CrMo steel plate:
Thickness： 3-250mm
Width： 1220-4200mm
Length: 5000-18000mm
Notes: coil thickness ≤ 25mm
GB/T 3077 42CrMo steel plate Chemical composition:
| Carbon C | 0.38 to 0.45% |
| Si | 0.17 ~ 0.37% |
| Manganese Mn | 0.50 to 0.80% |
| Sulfur S | allow residual content ≤ 0.035% |
| Phosphorus P | Allowable residual content ≤ 0.035% |
| Cr | 0.90 to 1.20% |
| Nickel Ni | Allow residual content ≤ 0.030% |
| Copper Cu | Allowable residual content ≤0.030% |
Molybdenum Mo: 0.15 to 0.25%
Mechanical properties of GB/T 3077 42CrMo steel plate:
| Yield strength σs (MPa) | ≥930 (95) |
| Elongation rate δ5 (%) | ≥12 |
| Section shrinkage ψ (%) | ≥45 |
| Impact energy Akv (J) | ≥63 |
| Impact toughness value αkv (J / cm2) | ≥78 (8) |
| Hardness | ≤217HB |
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