Certificates

WKZ055-2005        SA516Gr70N+S5

1.Ingot, billet all accordingto Ⅱgroup steel heating, adopt the Ⅱtype controlled rolling, finishing rolling temperature ≤870 ℃.

2.normalized temperature: 910±10℃.   Normalizing furnace’s total heating time     ≥1.6min/mm,

  the heat preservation time of  outside machine furnace and car bottom furnace:    ≥1.6 min/mm