This is a fully killed steel produced to fine grain practice by the electric arc or basic oxygen furnace process. Its relatively high strength coupled with reasonably good ductility make it a natural choice for miscellaneous parts such as shafts and gears.
Special welding procedures are required in welding this grade because its relatively high carbon and manganese content promote high hardness and brittleness in the heat affected zone.
It is the most common shafting steel in the medium carbon range.
| TYPICAL CHEMICAL ANALYSIS |
| Carbon (C) | .43-.50 |
| Manganese (Mn) | .60-.90 |
| Sulphur (S) | .05 max |
| Phosphorus (P) | .04 max. |
|
Metric
Size |
Size (inches) |
Est. Weight
per Ft. (lbs) |
|
5 |
0.1969 |
0.114 |
|
6 |
. 2362 |
.165 |
|
8 |
.315 |
.292 |
|
10 |
0.3937 |
0.414 |
|
11 |
0.4331 |
0.501 |
|
12 |
0.4724 |
0.596 |
|
13 |
0.5118 |
0.699 |
|
14 |
0.5512 |
0.811 |
|
15 |
0.5906 |
0.931 |
|
16 |
0.6299 |
1.059 |
|
17 |
0.6693 |
1.196 |
|
18 |
0.7087 |
1.341 |
|
19 |
0.748 |
1.494 |
|
20 |
0.7874 |
1.655 |
|
25 |
0.9843 |
2.586 |
|
30 |
1.1811 |
3.724 |
|
35 |
1.378 |
5.069 |
|
|
Metric
Size |
Size (inches) |
Est. Weight
per Ft. (lbs) |
|
40 |
1.5748 |
6.621 |
|
45 |
1.7717 |
8.379 |
|
50 |
1.9685 |
10.35 |
|
55 |
2.1654 |
12.52 |
|
60 |
2.3622 |
14.9 |
|
65 |
2.5591 |
17.48 |
|
70 |
2.7559 |
20.286 |
|
75 |
2.952 |
23.3 |
|
80 |
3.1496 |
26.48 |
|
85 |
3.346 |
29.9 |
|
90 |
3.5433 |
33.52 |
|
100 |
3.937 |
41.38 |
|
110 |
4.3307 |
50.07 |
|
120 |
4.7244 |
59.59 |
|
125 |
4.921 |
64.67 |
|
140 |
5.511 |
81.1 |
|
