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wholesale Air cylinder tube Seamless tube Brief introduction: After quenching and tempering, the parts have good comprehensive mechanical properties and are widely used in all kinds of important structural parts, especially those connecting rod, bolt, gear and shaft under alternating load. But the surface hardness is low, not wear-resisting. Conditioning or surface hardening can be used to improve the surface hardness of parts. CK45 Precision Tube Technological process Tube—Test—Test—heating—stripping—Pickling—grinding—Punch—Welding—Cold—air lubrication solution—pickling pickling pa