OD:5.5mm~250mm 1) Hot forged materiall:Φ5.5mm~250mm,square:40mm~240mm×40mm~240mm2) Grade:310, 321,347, 304, 304L, 316, 316L and etc. 3) Standards: GB/ASTM/ASME/DIN/JIS 4) Applications range: For use in the petroleum, chemical, medical equipment, boiler heat-exchanger and other fields. stainless steel 304 bar