... , forged elbow 2. pipe fitting 3. carbon, stainless steel, alloy steel 4. ASME, DIN, JIS, GB WeldSeamless Nominal SizeDN250- ... .4571 Alloy steel: 1.7335, 1.7380, 1.0488 (1.0566) JISCarbon steel: PG370, PT410 Stainless steel:SUS304, SUS304L, SUS316, SUS316L, ... SUS321 Alloy steel: PA22, PA23, PA24, PA25, ...