我司現(xiàn)詢合金結構鋼管-出口：
Material -American Grade SAE 4340 AMS 6415 or Chinese Grade 40CrNiMo (GB/T 17107-1997),
Steel Melting Process-: EAF (Electric Furnace;)+LF+VD /VOD (Vacuum degassed) or　(ESR furnace for optional)
Tube Size -OD316mm Wt 16(+1/-0) mm, Length 2500 mm,
Supplied condition: Normalized & Temp. 250HB max or Quenched/tempered to 36-40HRc, 100% Ultrasonic Tested. SEP1921 Acceptance Level E/e
望能提供的什產廠家與我司聯(lián)系！