What is the chemical composition of Q460GJC-Z25 steel plate

Q460GJC-Z25 steel plate executive standard: GB/T 19879.
Q460GJC-Z25 is a high-performance building structure steel, a special killed steel with a quality grade of C, Q is the initial letter of yield, 460 is the yield value, in MPa, GJ is the acronym for high-tech construction, and C is the quality grade of steel plate. Z25 is the Z-direction performance of the steel plate. When the steel plate is required to have thickness-direction performance, add the symbols representing the performance level in the thickness direction after the above-mentioned grades, respectively: Q460GJC-Z15, Q460GJC-Z25, Q460GJC -Z35.

Q460GJC-Z25 steel plate chemical composition (melting analysis):
C≤0.2, Si≤0.55, Mn≤1.7, P≤0.025, S≤0.015, Ni≤1.2, Cr≤1.2, Mo≤0.5, Cu≤0.5, Nb≤0.11, V≤0.2, Ti≤0.03, Als≥ 0.015.
Remarks on composition:
Alt can be used instead of Als. 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≤0.22.
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.