STEEL GRADES

The steel grades commonly available in India are as follows
NICKEL-CHROMIUM-MOLYBDENUM STEELS
BS : 970	SAE/AISI	IS : 3930
EN : Spench	SPENCH	IS : 4432
		IS : 5517
EN- 16		35 Mn 6 Mo 3
EN- 19	4140	40 Cr 4 Mo 3
EN- 24	4340	40 Ni6 Cr4 Mo3
EN-25		31 Ni 10 Cr3 Mo6
EN-36		13 Ni 3 Cr 80
EN-40B		25 Cr 13 Mo 6
EN-111	3140	35 Ni 5 Cr 2
EN-353		15 Ni Cr 1 Mo12
EN-354	4320	15 Ni 1Cr 1Mo 15
CHROMIUM BEARING STEELS
BS : 970	SAE/AISI	IS : 4396
EN : Spe.	SPECN	IS : 3930
		IS : 4432
EN-31		103Cr1
EN-31	52100	103Cr2
EN-18D	5140	40Cr4
EN-48	5147	50Cr4
FREE CUTTING STEELS
BS : 970	SAE/AISI	IS : 4431
EN : Spe.	SPECN
EN-1A	1213	11C10S25
EN-7	1115	25C12S14
EN-8M	1140	40C10S18
EN-15 AM	1137	40C15S12
CARBON STEELS
BS : 970	SAE/AISI	IS : 1875
EN : Spe.	SPECN	IS : 1570
EN-32B	1015	CI-IA
EN-4	1026	CI-IIA
EN-5	1030	CI-III
EN-8	1040	CI-IV
EN-9	1055	CI-V
EN-42B	1065	CI-VI
CASE HARDENING STEELS
IS (NEW)	IS (OLD)	EN	DIN	AISI/SAE	BS
10C4	C10	En 32A		1012
15C8	C15Mn75	En 32B En32C	Ck15 C15	1016 ,1018
15Cr3	15Cr65	En 207	15Cr 3		527M20
16Mn5Cr4	17Mn1Cr95		16Mn Cr5
20MnCr5	20MnCr1		20MnCr5
15Ni5Cr4Mo1	15NiCr1Mo12	En 353			815M17
15Ni7Cr4Mo2	15Ni2Cr1Mo15	En 354		4320	820M17
20Ni7Mo2	20Ni2Mo25	En 34		4620	665M17
20NiCrMo2	20Ni55Cr50Mo20	En 362		8620	805M20
13Ni13Cr3	13Ni3Cr80	En 36A		3310	655M13
16Ni3Cr2	16Ni80Cr60	En 351			635M15
16Ni8Cr6Mo2	16NiCr2Mo20	En 355	17CrNiMo6		822M17
20Ni7Cr4Mo2		En 325
14CrNi6			15CrNi6
CARBON STEEL GRADES
IS (NEW)	IS (OLD)	EN	DIN	AISI/SAE	BS
20C8	C20	En 3A	C22	1020	05A20/060A20
25C8	C25 Mn 75	En 4		1025
30C8	C30	En 5		1030	080M30/080A30
35C8	C35 Mn 75		Ck35, C35	1035
			Ck38	1038
40C8	C40	En 8		1040	080 M 40
45C8	C45		Ck45,C45	1045
50C8	C50		Ck53	1050
55C8	C55 Mn 75	En 9	Ck55	1055	070 M 55
CASE HARDENING STEELS
IS:1570/1961		EQUIVALENT SPECIFICATION
DESIGNATION	ASP DESIGNATION	BS:970	SAE	DIN	GOST
		DESIGNATION	DESIGNATION	DESIGNATION	DESIGNATION
C-10	CH-1	En 32A	1012/1015
17Mn1Cr95	CH-2			16Mn Cr 5
20Mn1Cr1	CH-3			20MnCr5	20 xTA
20Ni2Mo25	CH-4	En 34	4620		15HMA
15Cr65	CH-5	En 207	5115	15Cr3	15 x1
16Ni-80Cr60	CH-6	En 351
20Ni55Cr
50Mo20	CH-7	En 362	8620, 8720
13Ni3
Cr80	CH-8	En 36A	3310
		36B
15NiCr	CH-9	En 353
1Mo12	CH-10	En 36C
15Ni2Cr
1Mo15	CH-11	En 354	4320
16NiCr
2Mo20	CH-12	En 355
				15CrNi6
ALLOY STEEL GRADES
IS (NEW)	IS (OLD)	EN	DIN	AISI/SAE	BS
20 C15	20Mn2	En 14A		1524	150M28
27C15	27Mn2	En14B	28Mn6	1527	150M28
37C15	37Mn2	En15, En15A	36Mn5	1536	150M36
			35 Mn5	1041
35Mn6Mo3	35 Mn2Mo28	En16			605M36
35Mn6Mo4	35 Mn2Mo45	En17			608M38
40Cr4	40Cr1	En18	37Cr4,39Cr4,41Cr4	5140	530M40
40Cr4Mo3	40Cr1Mo28	En19, En19A	42CrMo4	4140, 4142	708M40
40Ni6Cr4Mo3	40Ni2Cr1Mo28	En24	34CrNiMo6	4340	817M40
31NiOCr3Mo6	31Ni3Cr65Mo55	En25			826M31
40Ni10Cr3Mo6	40Ni3Cr65Mo55	En26			826M40
30Ni13Cr5	30Ni4Cr1	En30A
40Ni6Cr4Mo2	40Ni1Cr1Mo15	En110			816M40
35Ni5Cr2	35Ni1Cr60	En111			640M40
			50CrMo4	4150
HIGH CARBON HIGH CHROMIUM BEARING STEELS
IS	EN	DIN	AISI/SAE	BS
103Cr1			51100
103Cr2	En 31	100 Cr6	52100	534A99/535A99
103Cr2Mn70