Chemical composition and mechanical properties of 16MnDR, a Chinese grade of cryogenic pressure vessel steel.
16MnDR Approximate Grade Lookup Table
16MnDR Chemical Composition
| Grade | Chemical Composition(Quality Fraction)/% | ||||||||||
| C | Si | Mn | Ni | Mo | V | Nb | Altᵃ | N | P | S | |
| 16MnDR | ≤0.20 | 0.15~0.50 | 1.20~1.60 | ≤0.40 | ≤0.08 | 一 | 一 | ≥0.020 | ≤0.012 | ≤0.020 | ≤0.010 |
|
ᵃ When acid-soluble aluminum (Als) is used instead of Alt, the Al content should not be less than 0.015%; when Nb+V+Ti in the steel is ≥0.015%, the Al content is not required. |
|||||||||||
16MnDR Mechanical properties and processing properties
| Grade | Delivery status | Thickness mm | Tensile test | Impact test | 180°Bending test b=2a | |||
| Tensile strength Rm/MPa | Lower yield strength ReL/MPa |
Elongation after fracture A/% | Temperature℃ | Impact absorption energy KV₂J | ||||
| ≥ | ≥ | |||||||
| 16MnDR | Normal fire or Normal fire + Tempering | 5～16 >16～36 |
490～620 | 315 | 21 | ﹣40 | 47 | D=2a/D=3a |
| 470～600 | 295 | |||||||
| >36～60 | 460～590 | 285 | ||||||
| >60～100 | 450～580 | 275 | ||||||
| >100～120 | 440～570 | 265 | ||||||
Performance Comparison of Similar Grades of 16MnDR Low-Temperature Pressure Vessel Plates in China
| Grade | This grade 16MnDR | Q370R | 09MnNiDR | |||
| Same characteristics | Normalized | |||||
| Differences | -40℃ | -20℃ | -70℃ | |||