Certificates

 

WKZ034-2005（thickness＞80mm）A709-50

1. According to Ⅱgroup steel heating

2. adopt the Ⅱtype controlled rolling, Ⅱstage open rolling temperature :≤920℃finishing temperature≤880℃

3. The temperature after rolling steel cooling to red:≤680℃。

4. normalized technology:

normalizing furnace: 900 + 10 ℃, total heating time >1.5-1.8 min/mm,

outside machine furnace,car bottom furnace: 910 + 10 ℃, heat preservation time 1.5 min/mm