Chemical composition and mechanical properties of Q490DRL2, a Chinese grade of low-temperature pressure vessel steel.
Q490DRL2 Similar Grade Lookup Table

Q490DRL2 Chemical Composition

Grade Chemical Composition(Quality Fraction)/%
C≤ Si   Mn P≤ S≤ Cu≤ Ni Cr≤ Mo Nb≤ V Ti≤ B≤ Pcm≤
Q490DRL2 0.09 0.15~0.40 1.20~1.60 0.015 0.005 0.25 0.30~0.60 0.3  ≤0.30 0.05 0.02~0.06 0.03 0.002 0.22

Q490DRL2 Mechanical properties and processing properties

Grade Thickness mm Tensile test Impact test 180°Bending test b=2a
Lower yield strengthᵃ
ReL/MPa		 Tensile strengthRm/MPa Elongation after fracture A/% Temperature℃ Impact absorption energy KV₂/J Lateral expansion value LE/mm
Q490DRL2 10～60 ≥490 610～730 ≥17 -50 ≥80 - D=3a
Note: D is the diameter of the bending indenter; b is the width of the sample; a is the thickness of the sample.
ᵃ When the yielding phenomenon is not obvious, the specified plastic elongation strength Rp0.2 is adopted.