Introduction and industrial application of Q420C high-strength alloy steel plate

Introduction and industrial application of Q420C high-strength alloy steel plate

Q420C high-temperature alloy steel plate introduction and industrial application
Q420C steel plate introduction:
Q420C steel plate is a low-alloy high-strength steel plate, the implementation of GB/T1591 standard. The same level has Q420A, Q420B, Q420D, Q420E. Q420C steel plate has high strength and good fatigue resistance; High toughness and low brittle transition temperature; Good cold forming and welding properties; It has good corrosion resistance and certain wear resistance. High strength, especially in the normalized or normalized plus tempering state, it has high comprehensive mechanical properties.
Q420C, Q420CL, Q420CL1 steel plate, where S is the meaning of structural steel, Q means that the impact temperature of the steel plate is -20 °C, then QL means that the impact temperature of the steel plate is -50 °C, then guess what, what does QL1 represent, QL1 means that the impact temperature of the steel plate is -60 °C, and 460 means the thickness of £ 50mm The minimum yield strength value is specified.

Chemical composition

Tabulation: Depu Steel Date: 2024-01-18

grade	C	Mn	Si	P	S	V	Nb	Ti
A	≤0.2	1.0~1.7	≤0.55	≤0.045	≤0.045	0.02~0.20	0.015~0.060	0.02~0.20
B	≤0.2	1.0~1.7	≤0.55	≤0.040	≤0.040	0.02~0.20	0.015~0.060	0.02~0.20
C	≤0.2	1.0~1.7	≤0.55	≤0.035	≤0.035	0.02~0.20	0.015~0.060	0.02~0.20
D	≤0.2	1.0~1.7	≤0.55	≤0.030	≤0.030	0.02~0.20	0.015~0.060	0.02~0.20
E	≤0.2	1.0~1.7	≤0.55	≤0.025	≤0.025	0.02~0.20	0.015~0.060	0.02~0.20

(1): In order to improve the properties of steel, other trace alloying elements other than the above table can be added, and the data comes from the network and is for reference only.
(2): The allowable deviation of the chemical composition of the finished steel plate should comply with the provisions of
GB/T222 Q420C steel plate mechanical properties: tensile strength: 520-680Mpa Elongation: 18% Yield point: 360-420 Impact power:
27J
Q420C steel plate application
Q420C low-alloy high-strength plate large ships, bridges, power station equipment, medium and high pressure boilers, high-pressure vessels, rolling stock, overweight machinery, mining machinery, and other large welded structural parts.