... ,ASTM,JIS Material:304/304L,316/316L,321ect. 1)Product: Stainless steel 90 elbow, Butt Welding fitting2) Size: Seamless 1/2"-24" (DN15 ... , 321, 321H,304H,347H,904L,UNS S31803,310S, 6) Our stainless steel elbow are corrosion and high-temperature resistant. stainless steel 90 elbow