b550nqr1 weather steel for welded structure

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b550nqr1 weather steel for welded structure

  • BBN STEEL supply GB T 4171 Q355GNH weather steel for welded structure, Corten A, S355J2WP, 09CuPCrNi-A, 05CuPCrNi, Q355GNH, Q355NH, SPA-H, SPA-C, A242 Type 1 weathering resistant steel …
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