Equivalent / similar standards
- British Standard (BS): BS 970 080M40, BS 970 080A42
- Indian Standard (IS): IS 1570 C40, IS 1570 C45, IS 5517 40C8
- American (ASTM): ASTM A29/A29M Grade 1040, ASTM A108 Grade 1040
- European (EN): EN 10083-2 C40E, EN 10277 C45, EN 10083-1 C45E
- Japanese (JIS): JIS G4051 S40C, JIS G4051 S45C
- German (DIN): DIN 17200 C40, DIN 17200 C45, DIN 1652-2 CK40
- French (AFNOR): AFNOR 35-552 C40, AFNOR C45E, AFNOR XC42
- Italian (UNI): UNI C40, UNI C45, UNI C45E
- Russian (GOST): GOST 1050 Grade 40, GOST 1050 Grade 45, GOST 8732 Grade 40
- Korean (KS): KS D 3752 SM45C, KS D 3520 S45C
- Chinese (GB): GB/T 699 45#, GB 45#
- Canadian (CSA): CSA G40.21 40W
- Australian (AS/NZS): AS 1443-1994 Grade 1040, AS 1444-2007 Grade 1045
- Swedish (SS): SS 1650 1674, SS 1672 S45C
- Turkish (TS): TS 1051 C40, TS 1051 C45
- Brazilian (NBR): NBR 7007 SAE 1040, NBR 7007 SAE 1045
- South African (SABS): SABS 1195 Grade C40, SABS 1195 Grade C45
- Mexican (NMX): NMX-B-506-C SAE 1040, NMX-B-506-C SAE 1045
- Finnish (SFS): SFS 2357 C40E, SFS 2371 SS45
- Spanish (UNE): UNE 36011 C40E, UNE 36011 C45E
- Czech (ČSN): ČSN 12050 12045, ČSN 41 1203 12050
- ISO: ISO 683-1 C45E, ISO 683-1 C40E
- MIL (Military Standard): MIL-S-22698C Grade C1040, MIL-S-22698C Grade C1045
- Argentinian (IRAM): IRAM 1520 SAE 1040, IRAM 1520 SAE 1045
- Polish (PN): PN 74/H-84019 C45, PN-EN 10083-1 C40E
- Norwegian (NS): NS 11-212/45, NS 11-213/40
- Romanian (STAS): STAS 3611/89 C45, STAS 3611/89 C40
- Belgian (NBN): NBN 35-551 C40, NBN 35-552 C45
- Dutch (NEN): NEN 1778 C45, NEN 1777 C40
- Austrian (ÖNORM): ÖNORM M4125 C40, ÖNORM M4125 C45
- Indonesian (SNI): SNI 07-2761 Grade 1040, SNI 07-2762 Grade 1045
- Singapore (SS): SS 400 C40, SS 402 C45
- Malaysian (MS): MS 1804 Grade 40, MS 2025 C45
- Philippines (PNS): PNS 06-153 C40, PNS 07-156 C45
- Thai (TIS): TIS 1227 C40, TIS 1340 C45
- Pakistani (PS): PS 1610 C40, PS 2300 C45
- Hungarian (MSZ): MSZ 24-031 C40, MSZ 24-031 C45
- Bulgarian (BDS): BDS 12125 C40, BDS 12126 C45
- Ukrainian (DSTU): DSTU 7809 C40, DSTU 7809 C45
- Egyptian (ES): ES 226-4 C40, ES 226-4 C45
- Vietnamese (TCVN): TCVN 1656 45C, TCVN 1657 40C
- Iranian (ISIRI): ISIRI 3759 Grade C40, ISIRI 3760 Grade C45
- Saudi Arabian (SASO): SASO 580-3 C40, SASO 580-3 C45
- New Zealand (NZS): NZS 4671 Grade 40, NZS 4671 Grade 45
- Swiss (SN): SN 2241 C40, SN 2241 C45
- Greek (ELOT): ELOT 1-1050 C40, ELOT 1-1050 C45
- Portuguese (NP): NP EN 10083-1 C40E, NP EN 10083-1 C45E
- Icelandic (IST): IST 64-1 C40, IST 64-1 C45
- Taiwan (CNS): CNS 1124 S40C, CNS 1125 S45C
- Colombian (NTC): NTC 1661 SAE 1040, NTC 1662 SAE 1045
- Chilean (NCh): NCh 1120 Grade C40, NCh 1121 Grade C45
