GB/T714 Q420qC, Q420qC-Z15, Q420qC-Z25 bridge steel plate

Chemical composition of Q420qC bridge steel plate:
C carbon: 0.18; Si silicon: 0.55; Mn manganese: 1.00-1.70; P phosphorus: 0.03; S sulfur: 0.025; Nb niobium: 0.06; V vanadium: 0.08; Ti titanium: 0.03; Cr chromium: 0.80; 0.70; Cu copper: 0.55; Mo molybdenum: 0.35; B boron: 0.04; Als acid-soluble aluminum: 0.015.

Q420qC steel plates are mostly used to manufacture various bridges, lay railways, highways, etc. As the name suggests, bridge plates are definitely used in bridge-related structures.

Q420qC bridge steel plate implements the standard GB/T 714.

Mechanical properties of Q420qC steel plate:
Yield strength: 420MPa;
Tensile strength: 540MPa;
Elongation after break: 19%;
Shock temperature: -20℃;
Shock absorption energy: >47J;

Q420qC bridge steel plate has good atmospheric corrosion resistance and machinability. The capital "Q" in the grade indicates the yield of the steel plate, "420" is the yield strength of the steel plate, "q" indicates the meaning of the bridge steel plate, and "C" is the quality grade of the steel plate, that is, the impact temperature of the steel plate.

Heat treatment state of Q420qC steel plate: hot rolling, controlled rolling and normalizing.