Equivalents / similar steels to SAE 4340 / AISI 4340:
- British Standard (BS): BS 970 817M40
- Indian Standard (IS): IS 5517 40Ni2Cr1Mo28
- American (ASTM): ASTM A322 Grade 4340, ASTM A331 Grade 4340
- European (EN): EN 10083-3 34CrNiMo6
- Japanese (JIS): JIS G4105 SNCM439
- German (DIN): DIN 1.6582, 34CrNiMo6
- French (AFNOR): AFNOR 35NiCrMo16
- Italian (UNI): UNI 35NiCrMo12
- Russian (GOST): GOST 4543 36NiCrMo4
- Korean (KS): KS SNCM439
- Chinese (GB): GB/T 3077 40CrNiMoA
- Canadian (CSA): CSA G40.21 50CrMoNi
- Australian (AS/NZS): AS 1444-2007 Grade 4340
- Swedish (SS): SS 2541 36NiCrMo16
- Turkish (TS): TS 36NiCrMo16
- Brazilian (NBR): NBR SAE 4340
- South African (SABS): SABS 1431 Grade 4340
- Mexican (NMX): NMX-B-506-C SAE 4340
- Finnish (SFS): SFS 2541 34NiCrMo16
- Spanish (UNE): UNE 36011 34NiCrMo16
- Czech (ČSN): ČSN 41 5141
- ISO: ISO 683-2 Grade 34CrNiMo6
- MIL (Military Standard): MIL-S-8698 SAE 4340
- Argentinian (IRAM): IRAM 6245 SAE 4340
- Polish (PN): PN 34HNM
- Norwegian (NS): NS 2541 34NiCrMo6
- Romanian (STAS): STAS 42NiCrMo6
- Belgian (NBN): NBN 34CrNiMo6
- Dutch (NEN): NEN 34NiCrMo6
- Austrian (ÖNORM): ÖNORM 34NiCrMo6
- Indonesian (SNI): SNI 34NiCrMo6
- Singapore (SS): SS 2541 34NiCrMo6
- Malaysian (MS): MS 2541 34NiCrMo6
- Philippines (PNS): PNS 34NiCrMo6
- Thai (TIS): TIS 34NiCrMo6
- Pakistani (PS): PS 2541 34NiCrMo6
- Hungarian (MSZ): MSZ 2541 34NiCrMo6
- Bulgarian (BDS): BDS 34NiCrMo6
- Ukrainian (DSTU): DSTU 34NiCrMo6
- Egyptian (ES): ES 34NiCrMo6
- Vietnamese (TCVN): TCVN 34NiCrMo6
- Iranian (ISIRI): ISIRI 40Ni2Cr1Mo28
- Saudi Arabian (SASO): SASO 34NiCrMo6
- New Zealand (NZS): NZS 34NiCrMo6
- Swiss (SN): SN 34NiCrMo6
- Greek (ELOT): ELOT 34NiCrMo6
- Portuguese (NP): NP EN 34NiCrMo6
- Icelandic (IST): IST 34NiCrMo6
- Taiwan (CNS): CNS SNCM439
- Colombian (NTC): NTC SAE 4340
- Chilean (NCh): NCh 34NiCrMo6
