Chemical composition and mechanical properties of Chinese low-temperature pressure vessel steel 06Ni9DR
06Ni9DR Approximate Grade Lookup Table

Chemical Composition

Grade Chemical Composition(Quality Fraction)/%
C Si Mn Ni P S Cr Cu Mo V Nb Alt
≤ ≤ ≥
06Ni9DR 0.08 0.10~0.35 0.30~0.80 8.50~10.00 0.008 0.003 0.25 0.35 0.10 0.01 0.08 0.015

Cr-Mo+Cu≤0.50%。
When the thickness is greater than 100 mm, the upper limit of C content can be 0.12%.
When the thickness is greater than 50 mm, the upper limit of C content can be 0.12%.

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 strengthRm/MPa Elongation after fractureA/% Temperature℃ Impact absorption energy KV₂/J
06Ni9DR 5～30 ≥560 680～820 ≥18 -196 ≥80 D=3a
>30～50 ≥550
>50～80 ≥540