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Lead added to this grade increases parts production by some 25% with excellent finish and good tool life. Machining speeds are increased to 145 sfm and there are no adverse effects on properties. Readily carburized, the well balanced alloy content of this grade permits hardening to produce a strong, tough core and high case hardness.
| Shape |
Round |
| Grade |
8620 |
| Tolerance |
Meets cold finished carbon steel bar manufacturing tolerances |
| Application |
Structural parts such as gears, pinions, spline shafts, pins and a variety of other important applications requiring a hard wear surface and a ductile core. |
Round |
For best delivery lengths should be specified as 11'/13'. |
|
| Rounds |
Standard "as drawn" finish |
| Rounds |
Ground and Polished |
| Rounds |
Turned Ground and Polished |
| Rounds |
Turned and Polished |
| Rounds |
Rough Turned |
|
| Carbon |
0.18/0.23 |
| Manganese |
0.70/0.90 |
| Phosphorus |
0.035 (Max) |
| Sulphur |
0.04 (Max) |
| Silicon |
0.15/0.35 |
| Nickel |
0.40/0.70 |
| Chromium |
0.40/0.60 |
| Molybdenum |
0.15/0.25 |
| Lead |
0.15/0.35 |
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