| PS Grades (Formerly EX Grades) |
| Chemical Composition Ranges and Limits |
| PS No. |
C |
Mn |
Cr |
Ni |
Mo |
B |
V |
| 10 |
.19/.24 |
.95/1.25 |
.25/.40 |
.20/.40 |
.05/.10 |
— |
— |
| 16 |
.20/.25 |
.90/1.20 |
.40/.60 |
— |
.13/.20 |
— |
— |
| 17 |
.23/.28 |
.90/1.20 |
.40/.60 |
— |
.13/.20 |
— |
— |
| 18 |
.25/.30 |
.90/1.20 |
.40/.60 |
— |
.13/.20 |
— |
— |
| 19 |
.18/.23 |
.90/1.20 |
.40/.60 |
— |
.08/.15 |
.0005-.003 |
— |
| 20 |
.13/.18 |
.90/1.20 |
.40/.60 |
— |
.13/.20 |
— |
— |
| 21 |
.15/.20 |
.90/1.20 |
.40/.60 |
— |
.13/.20 |
— |
— |
| 31 |
.15/.20 |
.70/.90 |
.45/.65 |
.70/1.00 |
.45/.60 |
— |
— |
| 32 |
.18/.23 |
.70/.90 |
.45/.65 |
.70/1.00 |
.45/.60 |
— |
— |
| 33 |
.17/.24 |
.85/1.25 |
.20 min |
.20 min |
.05 min |
— |
— |
| 34 |
.28/.33 |
.90/1.20 |
.40/.60 |
— |
.13/.20 |
— |
— |
| 36 |
.38/.43 |
.90/1.20 |
.45/.65 |
— |
.13/.20 |
— |
— |
| 38 |
.43/.48 |
.90/1.20 |
.45/.65 |
— |
.13/.20 |
— |
— |
| 39 |
.48/.53 |
.90/1.20 |
.45/.65 |
— |
.13/.20 |
— |
— |
| 40 |
.51/.59 |
.90/1.20 |
.45/.65 |
— |
.13/.20 |
— |
— |
| 54 |
.19/.25 |
.70/1.05 |
.40/.70 |
— |
.05 min |
— |
— |
| 55 |
.15/.20 |
.70/1.00 |
.45/.65 |
1.65/2.00 |
.65/.80 |
— |
— |
| 56 |
.08/.13 |
.70/1.00 |
.45/.65 |
1.65/2.00 |
.65/.80 |
— |
— |
| 58 |
.16/.21 |
1.00/1.30 |
.45/.65 |
— |
— |
— |
— |
| 59 |
.18/.23 |
1.00/1.30 |
.70/.90 |
— |
— |
— |
— |
| 61 |
.23/.28 |
1.00/1.30 |
.70/.90 |
— |
— |
— |
— |
| 63 |
.31/.38 |
.75/1.10 |
.45/.65 |
— |
— |
.0005-.003 |
— |
| 64 |
.16/.21 |
1.00/1.30 |
.70/.90 |
— |
— |
— |
— |
| 65 |
.21/.26 |
1.00/1.30 |
.70/.90 |
— |
— |
— |
— |
| 66 |
.16/.21 |
.40/.70 |
.45/.75 |
1.65/2.00 |
.08/.15 |
— |
.10/.15 |
| 67 |
.42/.49 |
.80/1.20 |
.85/1.20 |
— |
.25/.35 |
— |
— |
| NOTE: | Unless specified: Si = .15/.35, P = .025 max, S = .025 max. |
| | PS No.s 15, 24 and 30 are now standard grades. (See SAE No.s 4120, 4121 and 4715.) |
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