Chemical composition and mechanical properties of Q580R, a Chinese grade of low-temperature pressure vessel steel.
Q580R Similar Grade Lookup Table
Chemical Composition
| Grade | Chemical Composition(Quality Fraction)/% | |||||||||||||
| C | Si | Mn | P | S | Cu | Ni | Cr | Mo | Nb | V | Ti | B | Pcm | |
| Q580R | ≤0.10 | 0.15~0.40 | 1.20~1,60 | ≤0.015 | 0.008 | ≤0.25 | ≤0.40 | ≤0.50 | 0.10~0.30 | ≤0.05 | 0.02~0.06 | ≤0.03 | ≤0.002 | ≤0.25 |
Mechanical properties and processing properties
| Grade | Thickness mm | Tensile test | Impact test | 180°Bending test b=2a |
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| Lower yield strength ReL/MPa |
Tensile strength Rm/MPa |
Elongation after fracture A/% |
Temperature ℃ |
Impact absorption energy KV₂/J |
Lateral expansion value LE/mm |
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| Q580R | 10～60 | ≥580 | 690～820 | ≥16 | -20 | ≥80 | ≥0.64 | D=3a |