Dear sir, I'm a saler of a manufacture in China. our company produce stainess steel flange mainly but aslo produce carbon steel flange. the metrial we have are 304/1.4301 304L/1.4307 316/1.4401 316L/1.4404 321/1.4541 316Ti/1.4571 F51 A105 and so on. the standard we have are ANSI, DIN, BS, AS, EN, JIS, UNI and so on, we aslo can produce accroding to you darwings. If you need , wish to inquiry and purchase. Best wishes! Lyre