Q355C Steel Material

Q355C steel belongs to the Q355 low-alloy high-strength steel under GB/T1591-2018 standard. There are also Quality B, and Quality D. Q355B, Q355C and Q355D have little differences in chemical composition and mechanical properties. Below is the detailed information about the Q355C material.

Which grade equal to Q355C steel in GB/T1591-2018?

Q345C in GB/T1591-2008
S355J0 in EN 10025-2:2004
S355C in ISO 630-2: 2011

What is the chemical composition(%) of Q355C steel?

C max.	Si max.	Mn	P max.	S max.	Cr max.	Ni max.	Cu max.	N max.	Nb	V	Ti	Mo max	N max
0.20	0.50	0.90-1.65	0.030	0.030	0.30	0.50	0.40	0.012	0.005 - 0.05	0.01-0.12	0.006 - 0.05	0.10	0.015

What is the mechanical properties of Q355C steel plate?

Grade	Yield strength MPa in different thickness mm
	≤16	16-40	40-63	63-80	80-100	100-150	150-200	200-250
Q355C	≥355	≥345	≥335	≥325	≥315	≥295	≥285	≥275

Tensile strength and elongation in different thickness mm

Grade	Tensile strength MPa			Elongation % min.
	≤100	100-150	150-250	≤40	40-63	63-100	100-150	150-250	250-400
Q355C	470-630	450-600	450-600	22	21	20	18	17	17

As a supplier of Q355 low-alloy high-strength steel, the company can supply Q355 high-strength steel plate, Q355 steel angles, Q355 hot rolled steel beams with prime quality. They can be delivered in hot rolled, normalized, or thermomechanical rolled condition.
 

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