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Q235B Cold Rolled Carbon Steel Coil Galvanised Steel Strip Prepainted Steel Coil
It consists of Q+number+quality grade symbol+deoxidation method
symbol. Its steel grade is preceded by "Q", which represents the
yield point of steel. The following number represents the yield
point value, and the unit is MPa. For example, Q235 represents the
yield point( σ s) It is 235 MPa carbon structural steel. ② If
necessary, the symbol indicating the quality grade and deoxidation
method can be marked behind the steel grade. The quality grade
symbols are A, B, C and D. Symbol of deoxidation method: F
represents rimmed steel; B represents semi killed steel; Z
represents killed steel; TZ represents special killed steel, and
killed steel may not be marked, that is, Z and TZ may not be
marked. For example, Q235-AF represents Grade A rimmed steel.
Q235B has a certain elongation, strength, good toughness and
castability, and is easy to punch and weld. It is widely used in
the manufacturing of general mechanical parts. It is mainly used
for welding structural parts with high quality requirements in
construction and bridge engineering.