| 4140/42 ALLOY STEEL |
4140 is a widely used general purpose
grade of alloy steel. It offers a wide range of highly desirable
properties such as good strength and hardenability, wear resistance,
toughness and good ductility. 4140 is an oil-hardening steel that
can maintain its properties even after long exposure to relatively
high working temperatures. A broad range of strength and toughness
is attainable through variations in heat treatment. These grades
are particularly suitable for forging because they have self-scaling
characteristics. Applications include bolts, couplings, axle shafts,
trailer axles, hydraulic machinery shafts, tractor arms and axles,
sprockets, high-temperature bolts, piston rods, spindles and drill
collars.
|
| CHEMICAL ANALYSIS |
| Carbon |
Manganese |
Phosphorous |
Sulphur |
| .38/43 |
.75/1.00 |
.035 Max. |
.040 Max |
| Silicone |
Chromium |
Molybdenum |
|
| .15/35 |
.80/1.10 |
.15/.25 |
|
| MECHANICAL PROPERTIES
(The following values are average and should
be considered as representative of the grade). |
| Cold Rolled Annealed |
Tensile
Strength (PSI) |
Yield
Strength (PSI)
|
Elongation
in 2" |
Reduction
of Area |
Brinell
Hardness |
Rockwell
Hardness |
| 105/120,000 |
85/95,000 |
15/25% |
45/55% |
215/235
|
96/100 B |
Hot
Rolled Annealed |
Tensile
Strength (PSI) |
Yield
Strength (PSI)
|
Elongation
in 2" |
Reduction
of Area |
Brinell
Hardness |
Rockwell
Hardness |
| 90/100,000 |
60/70,000 |
20/30% |
50/60% |
185/210
|
90/95 B |
3/8" thru 4" Diameter
- Cold Drawn Annealed
4-1/2" thru 12" Diameter - Hot Rolled Annealed |
| Size in Inches |
Estimated Wt (LBS) |
Size in Inches |
Estimated Wt (LBS) |
Size in Inches |
Estimated Wt (LBS) |
| Per Ft |
Per Ft |
Per Ft |
|
3/8 |
.3759 |
| |
1/2 |
.6682 |
| |
5/8 |
1.0440 |
| |
3/4 |
1.5040 |
| |
7/8 |
2.0460 |
| |
1 |
2.6730 |
| |
1-1/8 |
3.3830 |
| |
1-1/4 |
4.1760 |
| |
1-3/8 |
5.0530 |
| |
1-1/2 |
6.0140 |
| |
1-3/4 |
8.1860 |
|
| |
1-7/8 |
9.397 |
| |
2 |
10.690 |
| |
2-1/4 |
13.530 |
| |
2-1/2 |
16.710 |
| |
2-3/4 |
20.210 |
| |
3 |
24.060 |
| |
3-1/2 |
32.740 |
| |
4 |
42.770 |
| |
4-1/2 |
54.130 |
| |
4-3/4 |
60.310 |
| |
5 |
66.820 |
|
| |
5-1/4 |
73.67 |
| |
5-1/2 |
80.86 |
| |
6 |
96.22 |
| |
6-1/2 |
112.90 |
| |
7 |
131.00 |
| |
7-1/2 |
150.40 |
| |
8 |
171.10 |
| |
8-1/2 |
193.10 |
| |
9 |
216.50 |
| |
10 |
267.30 |
| |
12 |
384.90 |
|
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