COLD FINISHED CARBON STEEL BARS
|
COMPOSITION OF COLD FINISHED CARBON STEEL BARS
|
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|
Grade
|
Relative
Machinability, Based on 1212 as 100% |
Carbon
% |
Magnesium
% |
Phosphorous
% |
Sulfur
% |
|
1018
|
78
|
0.15-0.20
|
0.60-0.90
|
0.040 Max
|
0.050 Max
|
|
1045
|
57
|
0.43-0.50
|
0.60-0.90
|
0.040 Max
|
0.050 Max
|
|
1117
|
91
|
0.14-0.20
|
1.00-1.30
|
0.040 Max
|
0.08-0.13
|
|
1141
|
70
|
0.37-0.45
|
1.35-1.65
|
0.040 Max
|
0.08-0.13
|
|
1144
|
76
|
0.40-0.48
|
1.35-1.65
|
0.040 Max
|
0.24-0.33
|
|
1215
|
136
|
0.09 Max
|
0.75-1.05
|
0.04-0.09
|
0.26-0.35
|
|
12L14*
|
180
|
0.15 Max
|
0.85-1.15
|
0.04-0.09
|
0.26-0.35
|
*Lead 0.15-0.35%
| CARBON: |
Hardening element, strength, and hardness increase with increased carbon content. |
| MANGANESE: |
Contributes to strength and hardness, decreases weldability. |
| PHOSPHORUS: |
Contributes to strength and hardness, decreases ductility (ability to withstand deformation without rupture). |
| SULFUR: |
In free machining steels (1215, 12L14), the addition of sulphur improves machin-ability, decreases weldability. |
| LEAD: | Improves machinability |