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        

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