GRADE
S.No.
|
Indian Steel Grade
|
Equivalent International Steel Grades
|
Chemical Composition Specifications
|
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American
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European
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England
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Germany
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Japanese
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IS
|
SAE
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EN
|
BS
|
DIN
|
JIS
|
C%
|
Mn%
|
Si%
|
P%
|
S%
|
Cr%
|
Cu%
|
Ni%
|
V%
|
Others%
|
|
1 | C 40 | SAE 1040 | C 40 | EN 8 | C 40 | S40C | 0.35 – 0.45 | 0.60 – 0.90 | 0.15 – 0.35 | 0.040 max. | 0.040 max. | – | – | – | – | – |
2 | 45C8 | SAE 1045 | C 45 | – | C 45 | S45C | 0.40 – 0.50 | 0.60 – 0.90 | 0.10 – 0.35 | 0.050 max. | 0.050 max. | – | – | – | – | – |
3 | – | SAE 1050 | C 50 | EN 43 | C 50 | S50C | 0.47 – 0.55 | 0.60 – 0.90 | 0.10 – 0.35 | 0.045 max. | 0.045 max. | 0.40 max | – | 0.40 max. | – | Mo – 0.10max. |
4 | 55C6 | SAE 1055 | C55S | EN 9 | C 55 | S55C | 0.50 – 0.60 | 0.60 – 0.90 | 0.10 – 0.35 | 0.050 max. | 0.050 max. | – | – | – | – | – |
5 | – | SAE 1060 | C60S | – | C 60 | S60C | 0.57 – 0.65 | 0.60 – 0.90 | 0.10 – 0.35 | 0.045 max. | 0.045 max. | 0.40 max | – | 0.40 max. | Mo – 0.10 max. | |
6 | 65C6 | SAE 1065 | – | EN 42B | C 62 | S65C | 0.60 – 0.70 | 0.50 – 0.80 | 0.10 – 0.35 | 0.050 max. | 0.050 max. | – | – | – | – | – |
7 | 70C6 | SAE 1070 | C67S | – | C 67 | S70C | 0.65 – 0.75 | 0.50 – 0.80 | 0.10 – 0.35 | 0.050 max. | 0.050 max. | – | – | – | – | – |
8 | 75C6 | SAE 1075 | C75S | EN 42C | C 75 | – | 0.70 – 0.80 | 0.50 – 0.80 | 0.10 – 0.35 | 0.050 max. | 0.050 max. | – | – | – | – | – |
9 | C75-Cr25 | – | – | – | – | – | 0.70 – 0.78 | 0.60-0.80 | 0.35 max | 0.035 max | 0.030 max. | 0.15 – 0.27 | – | – | – | AI – 0.010 – 0.040 |
10 | – | – | – | – | 75Cr1 | – | 0.70 – 0.80 | 0.60 – 0.80 | 0.25 – 0.50 | 0.030 max | 0.030 max. | 0.30 – 0.40 | – | – | – | – |
11 | 80C6 | SAE 1080 | – | EN 42J | C 80 | – | 0.75 – 0.85 | 0.50 – 0.80 | 0.10 – 0.35 | 0.050 max. | 0.050 max. | – | – | – | – | – |
12 | 85C6 | SAE 1085 | – | EN 42D | – | – | 0.80 – 0.90 | 0.50 – 0.80 | 0.10 – 0.35 | 0.050 max. | 0.050 max. | – | – | – | – | – |
13 | – | SAE-1086 | C85S | – | – | SK85 | 0.80-0.90 | 0.50 max. | 0.35 max. | 0.030 max | 0.030 max | 0.30 max. | 0.25 max | 0.25 max | – | – |
14 | – | SAE-1095 | C100S | EN 44D | CK 101 | SK95 | 0.90-1.00 | 0.50 max. | 0.35 max. | 0.030 max | 0.030 max | 0.30 max. | 0.25 max | 0.25 max | – | – |
15 | 50Cr4V2 | SAE 6150 | 51CrV4 | EN 47 | 50CrV4 | SUP10 | 0.47 – 0.55 | 0.70 – 1.10 | 0.15 – 0.35 | 0.040 max. | 0.040 max. | 0.90 – 1.20 | – | – | 0.10 – 0.20 | – |
16 | – | – | – | – | 58CrV4 | – | 0.55 – 0.62 | 0.70 – 1.10 | 0.10 – 0.40 | 0.035 max. | 0.035 max. | 0.90 – 1.20 | – | – | 0.10 – 0.20 | – |
17 | – | – | C120U | – | – | SK120 |
1.15 – 1.25 |
0.10 – 0.50 | 0.10- 0.35 | 0.030 max. | 0.030 max. | – | – | – | – | – |
18 | – | – | 125Cr2 | – | – | SKS 81 |
1.10 – 1.30 |
0.50 max. | 0.35 max. | 0.030 max. | 0.030 max. | 020 – 0.50. | – | – | – | – |