... -88, ASTM A312, ASTM A213, ASTM A269, ASTMA511, DIN17456,JIS3459 2) Grade: AISI 304, 304L, AISI316, AISI316L, AISI321, AISI321H, AISI310S, AISI301 ... petroleum, smelting, foodstuff, power, papermaking, chemical, medical equipment, aviation, boiler heat exchanger, and other fields heat-exchanger tube