Steel Grades

The steel grades commonly available in India are as follows

 

NICKEL-CHROMIUM-MOLYBDENUM STEELS
BS : 970
EN : Spench
SAE/AISI
SPENCH
IS : 3930
IS : 4432
IS : 5517
C Mn Si Cr Ni Mo
EN- 16 35 Mn 6 Mo 3 0.32/0.40 1.30/1.80 0.10/0.35 0.20/0.35
EN- 19 4140 40 Cr 4 Mo 3 0.38/0.45 0.50/0.80 0.10/0.35 0.90/1.20 0.20/0.35
EN- 24 4340 40 Ni6 Cr4 Mo3 0.35/0.45 0.40/0.70 0.10/0.35 0.90/1.30 1.25/1.75 0.20/0.35
EN-25 31 Ni 10 Cr3 Mo6 0.27/0.35 0.50/0.70 0.10/0.35 0.50/0.80 2.30/2.80 0.40/0.70
EN-36 13 Ni 3 Cr 80 0.15/0.18 0.30/0.60 0.10/0.35 0.60/1.10 3.00/3.75
EN-40B 25 Cr 13 Mo 6 0.20/0.30 0.40/0.65 0.10/0.35 2.90/3.50 0.25/0.40 0.40/0.70
EN-111 3140 35 Ni 5 Cr 2 0.30/0.40 0.60/0.90 0.10/0.35 0.45/0.75 1.00/1.50
EN-353 15 Ni Cr 1 Mo12 0.12/0.18 0.60/1.00 0.10/0.35 0.75/1.25 1.00/1.50 0.80/0.15
EN-354 4320 15 Ni 1Cr 1Mo 15 0.12/0.18 0.60/1.00 0.10/0.35 0.75/1.25 1.50/2.00 0.10/0.20

 

CHROMIUM BEARING STEELS
BS : 970
EN : Spe.
SAE/AISI
SPECN
IS : 4396
IS : 3930
IS : 4432
C Mn Si Cr
EN-31 103Cr1 0.95/1.10 0.25/0.45 0.15/0.35 0.90/1.20
EN-31 52100 103Cr2 0.95/1.10 0.25/0.45 0.15/0.35 1.40/1.60
EN-18D 5140 40Cr4 0.38/0.44 0.60/0.90 0.10/0.35 0.90/1.20
EN-48 5147 50Cr4 0.45/0.55 0.60/0.90 0.10/0.35 0.90/1.20

 

FREE CUTTING STEELS
BS : 970
EN : Spe.
SAE/AISI
SPECN
IS : 4431 C Mn Si S&P
EN-1A 1213 11C10S25 0.08/0.15 0.80/1.20 0.10 0.25/0.05
EN-7 1115 25C12S14 0.20/0.30 1.00/1.50 0.25 0..15/0.05
EN-8M 1140 40C10S18 0.35/0.45 0.80/1.20 0.25 0.20/0.05
EN-15 AM 1137 40C15S12 0.35/0.45 1.30/1.70 0.25 0.10/0.05

 

CARBON STEELS
BS : 970
EN : Spe.
SAE/AISI
SPECN
IS : 1875
IS : 1570
C Mn Si
EN-32B 1015 CI-IA 0.10/0.20 0.60/0.90 0.15/0.35
EN-4 1026 CI-IIA 0.20/0.30 0.60/0.90 0.15/0.35
EN-5 1030 CI-III 0.25/0.35 0.60/0.90 0.15/0.35
EN-8 1040 CI-IV 0.35/0.45 0.60/0.90 0.15/0.35
EN-9 1055 CI-V 0.50/0.60 0.60/0.90 0.15/0.35
EN-42B 1065 CI-VI 0.60/0.70 0.60/0.90 0.15/0.35

 

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
DESIGNATION
ASP DESIGNATION NORMINAL CHEMESTRY EQUIVALENT SPECIFICATION
C Mn Si S Cr Ni Mo BS:970
DESIGNATION
SAE
DESIGNATION
DIN
DESIGNATION
GOST
DESIGNATION
C-10 CH-1 0.15 0.60 0.35 0.05 En 32A 1012/1015
MAX MAX
17Mn1Cr95 CH-2 0.17 1.1 0.30 0.05 0.95 16Mn Cr 5
20Mn1Cr1 CH-3 0.20 1.2 0.30 0.05 1.1 20MnCr5 20 xTA
20Ni2Mo25 CH-4 0.17 0.60 0.30 0.05 1.8 0.25 En 34 4620 15HMA
15Cr65 CH-5 0.17 0.60 0.30 0.05 0.75 En 207 5115 15Cr3 15 x1
16Ni-80Cr60 CH-6 0.18 0.90 0.30 0.05 0.70 0.80 En 351
20Ni55Cr
50Mo20 CH-7 0.18 0.80 0.30 0.05 0.50 0.60 0.22 En 362 8620, 8720
13Ni3
Cr80 CH-8 0.14 0.60 0.30 0.05 0.80 3.4 En 36A 3310
36B
15NiCr CH-9 0.17 0.90 0.30 0.05 1.0 1.22 0.12 En 353
1Mo12 CH-10 0.16 0.50 0.30 0.05 0.80 3.4 0.20 En 36C
15Ni2Cr
1Mo15 CH-11 0.17 0.80 0.30 0.05 1.0 1.7 0.15 En 354 4320
16NiCr
2Mo20 CH-12 0.18 0.60 0.30 0.05 1.5 2.0 0.20 En 355
0.15 0.50 0.30 0.035 1.5 1.5 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