Chemical composition and mechanical properties of Chinese low-temperature pressure vessel steel 06Ni7DR
06Ni7DR Approximate Grade Lookup Table
Chemical Composition
| Grade | Chemical Composition(Quality Fraction)/% | |||||||||||
| C | Si | Mn | Ni | P | S | Cr | Cu | Mo | V | Nb | Alt | |
| ≤ | ≤ | ≥ | ||||||||||
| 06Ni7DR | 0.08 | 0.05~ 0.30 |
0.30~ 0.80 |
6.50~ 7.50 |
0.008 | 0.003 | 0.5 | 0.35 | 0.3 | 0.01 | 0.03 | 0.015 |
Mechanical properties and processing properties
| Grade | Thickness mm | Tensile test | V-type impact test | 180°Bending test b=2a | |||
| Lower yield strength ReL/MPa |
Tensile strength Rm/MPa | Elongation after fracture A/% | Temperature℃ | Impact absorption energy KV₂/J | |||
| 06Ni7DR | 5～30 | ≥560 | 680～820 | ≥18 | -196 | ≥80 | D=3a |
| >30～50>50～80 | ≥550≥540 | ||||||