Q355C steel plate

Q355 Steel Description
Q355 is a kind of steel. It is a kind of low alloy high strength structural steel, widely used in Bridges, vehicles, ships, construction, pressure vessels, special equipment, etc., where “Q” means yield strength, 355 means the yield strength of this steel is 355MPa, and the yield value will decrease with the increase of the thickness of the material.

Chemical composition:
C: 0.24, Si: 0.55, Mn: 1.60, P: S: 0.035, 0.035, Cr: 0.30, Ni: 0.30, Cu: 0.40
 

C	Si	Mn	P	S	Cr	Ni	Cu
0.24	0.55	1.60	0.035	0.035	0.30	0.30	0.40

Q355 steel is a Chinese low alloy high strength structural steel, which replaced Q345,the material density is 7.85 g/cm3. According to GB/T 1591 -2018, Q355 has 3 quality levels: Q355B, Q355C and Q355D. “Q” is the first letter of Chinese Pinyin: “qu fu dian”, which means Yield Strength, “355” is the minimum value of yield strength 355 MPa for steel thickness ≤16mm, and tensile strength is 470-630 Mpa.

Datasheet and Specification

The tables below shows the Q355 material datasheet and specifications such as chemical composition, and mechanical properties.

Q355 Steel Chemical Composition (Hot rolled)

Steel Grade	Quality Grade	C % (≤)	Si % (≤)	Mn (≤)	P (≤)	S (≤)	Cr (≤)	Ni (≤)	Cu (≤)	N (≤)
Q355	Q355B	0.24	0.55	1.6	0.035	0.035	0.30	0.30	0.40	0.012
	Q355C	0.20			0.030	0.030				0.012
	Q355D	0.20			0.025	0.025				–

Features and Applications

Q355 steel has good mechanical properties, good weldability, hot and cold processing properties and corrosion resistance. Can be used to manufacture ships, boilers, pressure vessels, petroleum storage tanks, bridges, power station equipment, lifting transport machinery and other higher load welded structural parts.