... (approx 0.8-1.1% Nickel, 14.5-16% Chromium)202(approx 3.5-5.5% Nickel, 15 ... --16% Chromium)304(approx 7.8-9% Nickel, 17- ... TIG welded, Plasma Arc Welded.3) Standards: ASTM A554, ASTM A249, ASTM A269, ASTM A270, ASTM A312,DIN 118504) Mark: Steel Seal and ... paper, wooden cases or according to customers' requests. ASTM A312 Welded Stainless Steel Pipes, Tubes and Tubings for ...