Q420C steel is a low-alloy high-strength structural steel. Q420 steel is not only a high-strength steel, but also a low-carbon steel.
Q420C steel only has a higher tensile strength, the yield strength of Q235 steel is 235N/MM^2, and the yield strength of Q420 steel is 420N/MM^2.
Although Q420C steel has low carbon content and cannot be quenched and tempered, Q420C steel is very good for making steel plates, and its strength is much higher than that of Q235 steel.
Q420 steel has high strength, Q420 steel has good fatigue resistance; Q420 steel has high toughness and low brittle transition temperature; Q420 steel has good cold forming performance and welding performance; Q420 steel has good corrosion resistance and certain wear resistance.
The implementation standard of Q420 steel is GB1591-2008.
Chemical composition of Q420 steel
C:≤0.20;
Si: ≤0.50;
Mn: ≤1.70;
P: ≤0.030;
S: ≤0.030;
Nb: ≤0.07;
V: ≤0.20;
Ti: ≤0.20;
Cr: ≤0.30;
Ni: ≤0.80;
Cu: ≤0.30;
N: ≤0.015;
Mo: ≤0.20;
Als: ≥0.015.
Mechanical properties of Q420C steel
Tensile strength (σb/MPa): 520～680
Elongation (δ5/%) Grade δ5/%
Q420C steel is suitable for power towers, various types of lifting cranes, heavy vehicles, oil derricks, high-temperature fans, large electric shovels, dump trucks and drilling rigs, coal mine hydraulic supports, steel structures, etc.
