... DN ≤ 2800mm S ≤ 120mm 3.Product material: Carbon steel, alloy steel, stainless. 4.Carbon steel: Q235B, 20 #, Q345B, ASTM A53, A105, WPB, ST37 ... , ST44 so on. 5.Alloy steel: 16Mn, 20Gr, 40Gr 12Cr1MoV 15CrMo, 20G, A109, A515, A 516 ... L245, etc.6.Stainless Steel: SUS310S, 316,316 L, 302,321,304,304 L, 301 ...