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WKZ031-2005 A572Gr50

1. The ingot, billet all According to Ⅱgroup steel heating

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

3. The temperature after rolling steel cooling to red:≤700℃。

4, normalized technology:

normalizing furnace:900±10℃.totally heating time:≥1.6min/mm

Outside machine furnace, car bottom furnace:900±10℃

Heat preservation time1.5min/mm

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ASTM A572 Grade 50|A572 Gr.50|A

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