Chemical composition and mechanical properties of Chinese low-temperature pressure vessel steel 09MnNiDR
09MnNiDR Approximate Grade Lookup Table

Chemical Composition

Grade Chemical Composition(Quality Fraction)/%
C Si Mn Ni Mo V Nb Alt N P S
09MnNiDR ≤0.12 0.15~0.50 1.20~1.60 0.30~0.80 ≤0.08 一 ≤0.040 ≥0.020 ≤0.012 ≤0.015 ≤0.005

Mechanical properties and processing properties

Grade Delivery status Thickness mm Tensile test Impact test 180°Bending test b=2a
Tensile strengthRm/MPa Lower yield strength
ReL/MPa		 Elongation after fracture A/% Temperature<℃ Impact absorption energyKV₂/J
≥ ≥
09MnNiDR Normalizing or
Normalizing and tempering		 6～16 440～570 300 23 -70 60 D=2a
>16～36 430～560 280
>36～60 430~560 270
>60～80 420～550 260
>80～120 420～550 260 -60 60