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| 1020 | Structural steel, bars, plates | 4130 | General purpose, high strength steel shafts, gears, and pins |
| 1040 | Machinery parts, shafts | 4140 | Same as 4130 |
| 1050 | Machinery parts | 4150 | Same as 4130 |
| 1095 | Tools, springs | 5160 | High strength gears, bolts |
| 1137 | Shafts, screw machine parts (free-cutting alloy) | 8760 | Tools, springs, chisels |
| 1141 | Shafts, machined parts | ||
(Mott, 1996)
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