30CrMnSiA Grade Drilling Pipe – High-Strength, Corrosion-Resistant & Weldable for Demanding Wells Engineered for medium-high pressure, weakly corrosive, and dynamic-loading well environments, ...더 보기
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GB/T 9808 Seamless Steel Oil Well Pipe 30CrMnSiA Steel Casting Tube with Low residual Hoop Stresses