Chemical composition and mechanical properties of 13MnNiDR, a Chinese grade of low-temperature pressure vessel steel.
13MnNiDR Approximate Grade Lookup Table

Chemical Composition

Grade Chemical Composition(Quality Fraction)/%
C Si Mn Ni Mo V Nb Alt N P S
13MnNiDR ≤0.16 0.15~0.50 1.20~1.60 0.30~0.80 ≤0.08 ≤0.05 ≤0.050 ≥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 fractureA/% Temperature℃ Impact absorption energy KV₂/J
≥ ≥
13MnNiDR Normalizing or
Normalizing + Tempering		 5～36 490～610 345 22 -60 60 D=3a
>36～60 335
>60～100 325