详细说明
我司现询合金结构钢管-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
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