Internal Standard | BS | DIN | IS | EN | SAE / AISI | JIS | GOST | ISO | AFNOR | UNI (Italy) | SS (Sweden) | CSA (Canada) | AS/NZS | GB/T (China) | BS 970:1983 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
AISI 310 | 310S24 | X15CrNi25-20 | X15CrNi25-20 | 1.4845 | 310 | SUS310S | 20Ch25N20S2 | X15CrNi25-20 | Z15CN25-20 | X15CrNi25-20 | 2333 | 310 | 310 | 0Cr25Ni20 | 310S24 |
AISI 321 | 321S31 | X6CrNiTi18-10 | X6CrNiTi18-10 | 1.4541 | 321 | SUS321 | 08Kh18N10T | X6CrNiTi18-10 | Z6CNT18-10 | X6CrNiTi18-10 | 2337 | 321 | 321 | 1Cr18Ni9Ti | 321S31 |
AISI 309 | 309S24 | X15CrNiSi20-12 | X15CrNiSi20-12 | 1.4828 | 309 | SUS309S | 20Ch24N10S2 | X15CrNiSi20-12 | Z15CN20-12 | X15CrNiSi20-12 | 2343 | 309 | 309 | 0Cr23Ni13 | 309S24 |
AISI 446 | 446S45 | X10CrAl24 | X10CrAl24 | 1.4749 | 446 | SUS446 | 08Kh25Yu5 | X10CrAl24 | Z10CAL25 | X10CrAl24 | 2350 | 446 | 446 | 1Cr25Al | 446S45 |
Note: Heat resisting steels are specially alloyed for performance at elevated temperatures and oxidation resistance. They are widely used in furnaces, heat exchangers, and thermal processing environments. While primarily stainless in nature, their performance at high heat sets them apart from general corrosion-resistant grades.