The article is material properties introduction of S355JR carbon steel plate ,S355JR carbon steel plate is low alloy high strength structural steel in line with the European standard EN10025 . S355JR carbon steel plate is a low-alloy high strength structural steel in China, hardness of S355JR carbon steel plate is 70-80B, yield strength of S355JR carbon steel plate is between 300-400MPa.
S355JR carbon steel plate chemical composition: C: ≤0.22; Si: ≤0.55; Mn: ≤1.60; P: ≤0.025; S: ≤0.025. S355JR carbon steel plate is equivalent to China's Q345B.
S355JR carbon steel plate and S355J2 steel plate have different requirements on toughness impact, other mechanical properties and various requirements are the same.
S355JR carbon steel plate toughness impact work requirements: 20 ℃, impact power ≥ 27J
S355J2 toughness impact work requirements: -20 ℃, impact power ≥ 27J
As the temperature decreases, the impact of the same piece of steel will gradually decline, so S355J2 more expensive.
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