AISI, ASTM, EN, DIN & JIS to Indian (IS) Material Grade Equivalents

Practical reference chart mapping international material standards to their Indian (IS) equivalents. Compiled by Cloudnine Machining Private Limited, Chennai — for design engineers, procurement teams and buyers sourcing machined components and castings from India.

Carbon & Structural Steels

IS 2062 (structural), IS 1570 (chemical composition), IS 8500 (weldable structural)

Type / Application	AISI / SAE (US)	EN / DIN (EU)	JIS (Japan)	BS EN (UK, legacy)	Indian (IS)
General structural	`A36`	`S235JR`	`SS400`	`EN 3A`	`IS 2062 E250 (A/B)`
High-tensile structural	—	`S355JR`	`SM490A`	`50B`	`IS 2062 E410`
Low carbon (0.15 %C)	`1015`	`C15E`	`S15C`	`EN 3B`	`IS 1570 15C4`
Mild steel (0.20 %C)	`1020`	`C22E`	`S20C`	`EN 3B`	`IS 1570 20C8`
Medium carbon (0.30 %C)	`1030`	`C30E`	`S30C`	`EN 5`	`IS 1570 30C8`
Medium carbon (0.45 %C)	`1045`	`C45E`	`S45C`	`EN 8`	`IS 1570 45C8`
Higher carbon (0.55 %C)	`1055`	`C55E`	`S55C`	`EN 9`	`IS 1570 55C8`
Free-cutting (leaded)	`12L14`	`11SMnPb30`	`SUM24L`	`EN 1A Pb`	`IS 4431 11S25Pb`

Alloy Steels

IS 4432 (chemical composition of alloy steels), IS 5517 (heat-treatable alloy steel)

Type	AISI / SAE	EN / DIN	JIS	BS EN (UK, legacy)	Indian (IS)
Cr-Mo (0.40 %C)	`4140`	`42CrMo4`	`SCM440`	`EN 19`	`IS 40Cr4Mo3`
Cr-Mo (0.30 %C)	`4130`	`25CrMo4`	`SCM430`	—	`IS 25Cr4Mo2`
Ni-Cr-Mo (0.40 %C)	`4340`	`34CrNiMo6`	`SNCM447`	`EN 24`	`IS 40Ni6Cr4Mo3`
Cr (0.40 %C)	`5140`	`41Cr4`	`SCr440`	`EN 18`	`IS 40Cr4`
Bearing steel	`52100`	`100Cr6`	`SUJ2`	`BS 534 A99`	`IS T50Cr4 (IS 4398)`
Nitriding steel	`Nitralloy 135M`	`31CrMoV9`	`SACM645`	`EN 41B`	`IS 40CrAlMo7`
Case-hardening	`8620`	`21NiCrMo2`	`SNCM220`	`EN 362`	`IS 20NiCrMo2`

Stainless Steels

IS 6603 (bars and wire), IS 6911 (sheet, plate and strip), IS 6529 (tubes)

Family / Common name	AISI	EN / DIN	JIS	UNS	Indian (IS)
Austenitic 18/8	`304`	`X5CrNi18-10`	`SUS304`	`S30400`	`IS 04Cr18Ni10`
Low-carbon 18/8	`304L`	`X2CrNi19-11`	`SUS304L`	`S30403`	`IS 02Cr19Ni10`
Austenitic Mo (18/10/2)	`316`	`X5CrNiMo17-12-2`	`SUS316`	`S31600`	`IS 04Cr17Ni12Mo2`
Low-carbon Mo (18/10/2)	`316L`	`X2CrNiMo17-13-2`	`SUS316L`	`S31603`	`IS 02Cr17Ni12Mo2`
Ti-stabilised austenitic	`321`	`X6CrNiTi18-10`	`SUS321`	`S32100`	`IS 04Cr18Ni10Ti`
Heat-resistant austenitic	`310`	`X8CrNi25-21`	`SUS310S`	`S31008`	`IS 15Cr25Ni20`
Ferritic	`430`	`X6Cr17`	`SUS430`	`S43000`	`IS 04Cr17`
Martensitic (soft)	`410`	`X12Cr13`	`SUS410`	`S41000`	`IS 12Cr13`
Martensitic (hardenable)	`420`	`X20Cr13`	`SUS420J1`	`S42000`	`IS 20Cr13`
Precipitation-hardening	`17-4 PH (630)`	`X5CrNiCuNb16-4`	`SUS630`	`S17400`	`IS 05Cr17Ni4Cu4Nb`

Tool Steels

IS 3749 (tool and die steels), IS 7291 (high-speed steels)

Category	AISI	EN / DIN	JIS	Indian (IS)
Water-hardening	`W1`	`C105W1`	`SK105`	`IS T105Cr1`
Oil-hardening cold-work	`O1`	`90MnCrV8`	`SKS3`	`IS T90Mn2W50Cr45`
Air-hardening cold-work	`A2`	`X100CrMoV5`	`SKD12`	`IS XT100Cr5Mo`
Cold-work high-Cr	`D2`	`X153CrMoV12`	`SKD11`	`IS XT150Cr12Mo1V`
Cold-work high-Cr	`D3`	`X210Cr12`	`SKD1`	`IS XT210Cr12`
Hot-work Cr-Mo-V	`H13`	`X40CrMoV5-1`	`SKD61`	`IS X40Cr5MoV1`
Mould steel (pre-hardened)	`P20`	`40CrMnMoS8-6`	`PX5`	`IS X38CrMo14`
High-speed steel	`M2`	`HS6-5-2`	`SKH51`	`IS T42 (XT75W18Cr4V1)`
High-speed steel (Co)	`M35`	`HS6-5-2-5`	`SKH55`	`IS T87Co5`

Cast Iron & Spheroidal-Graphite (Ductile) Iron

IS 210 (grey iron castings), IS 1865 (spheroidal / ductile iron castings)

Type / Min. UTS	ASTM	EN / DIN	JIS	Indian (IS)
Grey iron ~200 MPa	`A48 Cl 30`	`EN-GJL-200 / GG20`	`FC200`	`IS 210 FG 200`
Grey iron ~260 MPa	`A48 Cl 35`	`EN-GJL-250 / GG25`	`FC250`	`IS 210 FG 260`
Grey iron ~300 MPa	`A48 Cl 45`	`EN-GJL-300 / GG30`	`FC300`	`IS 210 FG 300`
SG iron (ductile) 400/15	`A536 60-40-18`	`EN-GJS-400-15 / GGG40`	`FCD400-15`	`IS 1865 SG 400/15`
SG iron 500/7	`A536 65-45-12`	`EN-GJS-500-7 / GGG50`	`FCD500-7`	`IS 1865 SG 500/7`
SG iron 600/3	`A536 80-55-06`	`EN-GJS-600-3 / GGG60`	`FCD600-3`	`IS 1865 SG 600/3`
SG iron 700/2	`A536 100-70-03`	`EN-GJS-700-2 / GGG70`	`FCD700-2`	`IS 1865 SG 700/2`

Aluminium Alloys

IS 733 (wrought aluminium bars, rods and sections), IS 617 (aluminium alloy ingots and castings)

Common use	AA / UNS (US)	EN / DIN	JIS	Indian (IS)
Al-Mg-Si structural (T6)	`6061`	`EN AW-6061 / AlMg1SiCu`	`A6061`	`IS 63400 (IS 733)`
Al-Mg-Si extrusion	`6063`	`EN AW-6063 / AlMg0.5Si`	`A6063`	`IS 63400 (IS 733)`
Al-Cu high-strength (T3/T4)	`2024`	`EN AW-2024 / AlCu4Mg1`	`A2024`	`IS 24345 (IS 733)`
Al-Zn ultra-high strength	`7075`	`EN AW-7075 / AlZn5.5MgCu`	`A7075`	`IS 74530 (IS 733)`
Pure aluminium (99.5 %)	`1050`	`EN AW-1050A`	`A1050`	`IS 19500 (IS 733)`
Al-Mn workhorse (marine)	`3003`	`EN AW-3003 / AlMn1Cu`	`A3003`	`IS 31000 (IS 733)`
Al-Mg (marine, weldable)	`5083`	`EN AW-5083 / AlMg4.5Mn`	`A5083`	`IS 54300 (IS 733)`
Al-Si sand/gravity casting	`A356 / 356.0`	`EN AC-42100 / AlSi7Mg0.3`	`AC4C`	`IS A-9 (IS 617)`
Al-Si-Cu pressure die-casting	`A380 / 380.0`	`EN AC-46000 / AlSi9Cu3`	`ADC10`	`IS LM24 (IS 617)`
Al-Si eutectic die-casting	`A413 / 413.0`	`EN AC-44300 / AlSi12`	`ADC1`	`IS LM6 (IS 617)`

Copper, Brass & Bronze

IS 191 (copper), IS 319 (free-cutting brass), IS 291 & IS 288 (brass sheet/rod), IS 305 (leaded gunmetal)

Common name	UNS / AA (US)	EN / DIN	JIS	Indian (IS)
Electrolytic tough-pitch copper	`C11000 / Cu-ETP`	`CW004A`	`C1100`	`IS 191 ETP`
Oxygen-free copper	`C10200`	`CW008A / Cu-OF`	`C1020`	`IS 191 OF`
Free-cutting brass	`C36000`	`CW614N / CuZn39Pb3`	`C3604`	`IS 319 Type I`
Cartridge brass 70/30	`C26000`	`CW505L / CuZn30`	`C2600`	`IS 410 CZ106`
Naval brass	`C46400`	`CW719R / CuZn38Sn1`	`C4640`	`IS 291 CZ112`
Leaded gunmetal (LG2)	`C93200`	`CC493K`	`CAC406`	`IS 305 LTB2`
Phosphor bronze	`C51000`	`CW451K / CuSn5`	`C5111`	`IS 7815 PB1`
Aluminium bronze	`C61400`	`CW303G / CuAl8Fe3`	`C6140`	`IS 6912 AB2`

Please note: equivalent-grade mappings above list the closest Indian Standard counterpart based on chemistry and typical mechanical properties. Two "equivalent" grades from different standards can still differ in permitted tolerances, deoxidation practice, inclusion limits, heat-treatment condition or minimum property values. For critical or safety-related applications always cross-check the actual specification sheet, or contact us — we regularly machine to AISI, ASTM, EN, DIN, JIS and IS specifications.

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