Corresponding grades of 310 stainless steel: 1. National standard GB-T standard: digital grade: S31020, new grade: 20Cr25Ni20, old grade: 2Cr25Ni20, 2, American standard: ASTMA standard, S31000, SAE standard: /, UNS standard: 310, 3, Japanese standard JIS standard: SUH310, 4, German standard DIN standard: 1.4841, 5, European standard EN standard: X15CrNiSI25-21, French standard NF standard: z12cn25-20, British standard BS standard 310S31, Sweden: 142361, NTR standard: APFIS .