Discover the high-performance 631 alloy stainless steel pipe, a precision-engineered solution for demanding applications. Known as 0Cr17Ni7Al or SUS631, this semi-austenitic precipitation hardening stainless steel offers exceptional strength, corrosion resistance, and fatigue resistance. Ideal for aerospace, medical equipment, automotive, and industrial uses, it meets ASTM standards and comes in various diameters and finishes.