Q345GJC-Z35 steel is for building structure, Q is the initial letter of yield, 345 is the yield value, the unit is MPa, GJ is the acronym of Gaojian, C means the quality grade of the steel plate is C grade (grades are divided into B, C, D, E ), Z35 is the thickness direction performance, respectively: Q345GJC-Z15, Q345GJC-Z25, Q345GJC-Z35.
Q345GJC-Z35 high-performance steel for building structures is a special killed steel with a quality grade of C. it is a steel plate for high-strength building structures.
Q345GJC-Z35 chemical composition, melting analysis:
| C | Si | Mn | P | S | Ni | Cr | Mo | Cu | Nb | V | Ti | Als |
| ≤0.2 | ≤0.55 | ≤1.6 | ≤0.025 | ≤0.015 | ≤0.3 | ≤0.3 | ≤0.2 | ≤0.3 | ≤0.07 | ≤0.15 | ≤0.035 | ≥0.015 |
Remarks on ingredients: Als can be replaced by Alt, at this time Alt≥0.02, if any element of V, Nb or Ti is added to the steel, and its content is ≥0.015, the minimum Al content is not applicable; when the combination of V, Nb and Ti is added, V+Nb+Ti≤0.15. Ceq = C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15 Pcm=C+Si/30+(Mn+Cu+Cr)/20+Ni/60+Mo/15 +V/10+5B
The thickness of Q345GJC-Z35 steel plate can reach 120mm, and the larger thickness requires technical approval.
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