Applicable grades: Q195, Q215, Q235, Q275; SPCC (Japanese grade); ST12 (German grade)
Symbol:
1. Q-the code name for the yield point (limit) of ordinary carbon structural steel, which is the uppercase and lowercase letters of the first Chinese pinyin letter of "Qu"; 195, 215, 235, 255, and 275-represent their yield points (limits) respectively. ) value, unit: MPa (N/mm2); Because the comprehensive mechanical properties of Q235 steel such as strength, plasticity, toughness and weldability are the best among ordinary carbon structural steels, it can better meet general uses requirements, so the application range is very wide.
2. S-steel, P-plate, C-cold, fourth C-common.
3. ST-steel, 12-ordinary grade cold-rolled steel plate
Mark: Dimensional Accuracy-Dimensions-Steel Plate Variety Standards
Cold-rolled steel plate: steel grade-technical condition standards
Marking example: B-0.57501500-GB708-88; steel plate, standard number Q/BQB402, brand SPCC, heat treatment state annealed + flat (S), surface center processing state is pitted D, surface quality is FB level trimming (cutting Edge EC, untrimmed edge EM) steel plate, thickness 0.5mm, B-level accuracy, width 1000mm, A-level accuracy, length 2000mm, A-level accuracy, unevenness accuracy PF.A, then marked: steel plate ECQ/BQB 402- SPCC-SD-FB/(0.51000A2000A-PF.A)
