S355J2G3 Q355D C Section Steel

S355J2G3 is a European standard steel, the composition is: C Less than or equal to 0.20, Si Less than or equal to 0.55, Mn Less than or equal to 1.60, P Less than or equal to 0.035, S Less than or equal to 0.035. The beginning of S is structural steel, 355 means that the minimum yield strength is 355MPa.J2G3 means that the delivery state is normalized, the impact work of -20 degree is 27J, G3 and G4 are the meaning of the characterization of deoxidation mode. S355J2G3 indicates semi-killed steel.Q355D is a low-alloy high-strength steel plate, which is often used in the machinery manufacturing industryFor example; Crane, hydraulic press, construction machinery, heavy machinery, bridge structure, head, mechanical parts, steel structure, large forklift, agricultural machinery, etc

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1.Products Description

As structural steel, S355J2G3 and Q355D steel will inevitably involve welding in the application process.The welding performance of S355J2G3 and Q355D can be evaluated by calculating their carbon equivalent value (CEV).

CEV=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15.

S355J2G3		Q355D

<40	0.45	<30	0.45
40-150	0.47	30-150	0.47
150-250	0.49	150-250	0.49
-	-	250-400	0.49


Less than or equal to 0.35
0.36–0.40
0.41–0.45
0.46–0.50
Greater than or equal to 0.5

It can be seen from the above table that the welding performance of S355J2G3 and Q355D steel is good. As long as a reasonable welding process is used, a welding product with reliable quality can be obtained.

2.Products Details