Internal Standard
EN18
EN24
EN19C
EN19
EN18D
EN18C
EN353
EN18A
EN354
27C15
20MnCr5
20Mn2
16MnCr5
15Cr3
FILESTEEL
EN18B
SCM420
SAE8620
Equivalent Grades
BS
530A40
817M40
709M40
709M40
530A40
530A40
815M17
530A40
820M17
-
-
150M28
-
523A14
-
530A40
708M20
805M20
 
DIN
37Cr4
34CrNiMo6
-
42Cr4Mo2
37Cr4
37Cr4
-
37Cr4
-
28Mn6
20MnCr5
-
16MnCr5
15Cr3
-
37Cr4
-
-
 
IS
40Cr1
40NiCr4Mo3
40Cr4Mo3
40Cr4Mo3
40Cr1
40Cr1
15NiCr1Mo12
40Cr1
15NIVCr1Mo15
27C15
20MnCr1
20Mn2
17Mn1Cr95
15Cr65
-
40Cr1
-
20NiCrMo2
 
EN
EN18
EN24
EN19C
EN19
EN18D
EN18C
EN353
EN18A
EN354
-
-
EN14A
-
EN206
-
EN18B
-
EN362
 
SAE/AISI
5140
4340
4140,4142
4140,4142
5140
5140
-
5140
4320
1527
-
1524
5120
5015
-
5140
-
SAE8620