... :DN15-DN5000 Process:free forgingDie F OEM forged auto valve parts1.Material a)carbon steel SA234 WPB, SA234 WPC,SA42 WPL6, SA42 ... , 3 WP316 WP347 (H) ,WP317 (L),WP321.DIN 1.4301, 1.4306, 1.4401, 1.4571,JIS SUS304,SUS304, SUS304L, SUS316, SUS316 c) Alloy ...