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This is basic screw machine steel. The grade is used as a standard of comparison for machinability (1212 is rated as 100%). It machines easily, provides good surface finish and has good brazing properties. This steel is difficult to weld and not suitable for case hardening. Generally used where mechanical properties can be sacrificed for machinability.
| Shape |
Round, Hexagon |
| Grade |
1212 |
| Tolerance |
Meets cold finished carbon steel bar manufacturing tolerances |
| Application |
Screw machine parts that are not subject to severe stresses. |
Rounds |
A limited range of sizes |
| Hexagon |
A limited range of sizes |
|
Round |
For best delivery lengths should be specified as 11'/13'. |
| Hexagon |
For best delivery lengths should be specified as 11'/13'. |
|
| Rounds, Hexagon |
Standard "as drawn" finish |
| Rounds, Hexagon |
Ground and Polished |
| Rounds, Hexagon |
Turned Ground and Polished |
| Rounds, Hexagon |
Turned and Polished |
|
| Carbon |
0.13 (Max) |
| Maganese |
0.70/1.00 |
| Phosphorus |
0.07/0.12 |
| Sulphur |
0.16/0.23 |
|
| Tensile Strength |
78,000psi |
| Yield Strength |
60,000psi |
| Elongation in 2" |
10% |
| Reduction of Area |
35% |
| Brinell Hardness |
167 |
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