Certificates

 

 

WKZ028-2006       S50C、S55C

 

 Perform technical conditions: WJX008-2006

1, according to the group II steel of heating, steel ingot heating temperature 1280 ℃highest, below 1000 ℃, the rate of rise temperature≤120℃/h; The highest temperature 1270 ℃of billet heating, coke temperature of 1250 ℃, the total heating time ≥9min/mm

2, open rolling temperature: 1050 ~ 1150 ℃, finishing temperature ≤920 ℃.

3, normalized: 850 ±10 ℃, heat preservation time 1.5 min/mm.