Certificates

WKZ039-2006        A709M-HPS485W

1, billet and ingot heating according to the provisions of IIsteel group to execute.

2, and the use of type II controlled rolling, air steel thickness ≥2 h, phase II open rolling  temperature ≤920 ℃, finishing temperature≤860 ℃.

3, ACC cooling water turn to red temperature 700 ℃.

4, quenching: 930 ±10 ℃, heat preservation time 2 min.

5, and tempering technology to be fixed