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AISI 1018 commercial quality mild steel, bright drawn or smooth turned, with a good balance of strength, ductility and toughness, excellent weldability, also good formability and machinability.
Typical Applications:
Axles, bolts, connecting rods, motor shafts, hydraulic shafts, pump shafts, pins, machinery parts etc. Also, light duty gears, camshafts, spindles ratchets etc., when carburized.
| Weight % | C | Mn | P | S | Fe |
|---|---|---|---|---|---|
| minimum | 0.14 | 0.60 | — | — | 98.81 |
| maximum | 0.20 | 0.90 | 0.040 | 0.050 | 99.26 |
| Characteristics | English | Metric | |
|---|---|---|---|
| Nominal density
(68°F/20°C) |
0.284 lbs/in3 | 7.87 g/cm3 | |
| Specific heat | 50°C – 100°C
122°F – 212°F |
0.116 BTU/lb – °F | 486 J/KG- °K |
| 150°C – 200°C
302°F – 392°F |
0.125 BTU/lb – °F | 519 J/KG- °K | |
| 350°C – 400°C
662°F – 752°F |
0.143 BTU/lb – °F | 599 J/KG- °K | |
| Coefficient of thermal
expansion |
68°F – 212°F
20°C – 100°C |
6.66 micro in/in- °F | 12.0 micro m/m- °K |
| 68°F – 752°F
20°C – 400°C |
7.5 micro in/in- °F | 13.5 micro m/m- °K | |
| 68°F – 1112°F
20°C – 600°C |
8.00 micro in/in- °F | 14.4 micro m/m- °K | |
| Thermal conductivity | 0°C – 32°F | 30.0 Btu / ft-hr-°F | 51.9 W/m – °K |
| 100°C – 212°F | 29.4 Btu / ft-hr-°F | 50.8 W/m – °K | |
| 200°C – 392°F | 28.3 Btu / ft-hr-°F | 48.9 W/m – °K | |
| Electrical resistivity | 20°C / 68°F | 152 nΩ ∙ m | |
| 100°C / 212°F | 219 nΩ ∙ m | ||
| 200°C / 392°F | 293 nΩ ∙ m | ||
| Condition | Tensile | Hardness | Average machinabillity | |||||
|---|---|---|---|---|---|---|---|---|
| Ultimate strength | Yieldstrength | Elongation in 50 mm
(2 in.), |
Reduction
in area, |
HRB | % of steel 1212 = 100% | |||
| KSI | MPa | KSI | MPa | % | % | Min | % | |
| Hot rolled | 58 | 400 | 32 | 220 | 25 | 50 | 116 | — |
| Cold drawn | 64 | 440 | 54 | 370 | 15 | 40 | 126 | 70 |
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