Certificates

WKZ082-2006           API 2WGr50

 

1. The technology conditions

Executive API 2 W-1999 delivery status: TMCP

Special requirements: Nb+V≤0.1％，B≤0.00005％，S≤0.006％，N≤0.009％，0.05％≤Si≤0.5％。

4. The production process

4.1 vacuum processing, vacuum degree below 0.5 Tuo keep time frequency 15 minutes.

4.2 the liquidus temperature of 1524 ℃.

4.3 in group II steel billet heating, total heating time > 10 min/cm, the highest temperature of heat 1250 ℃, equal highest temperature of 1200-1220 ℃, high temperature in the furnace frequency time for 3.5 hours

4.4 the type II rolling technology, I open rolling temperature stage 1050-1150 ℃, the total pressure the frequency rate 60%,

4.5 ACC water-cooled, return to red temperature680-720 ℃.