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4140 ANLD Alloy and Mold Steel
AISI 4140 ANNEALED
4140 Annealed is fine quality alloy steel used for brake die tooling, support
tooling, die holders, short run stamping and bending dies
ANALYSIS
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Carbon |
.37/.44 |
Manganese |
.65/1.10 |
Phosphorus |
.035 Max |
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Silicon |
.15/.35 |
Molybdenum |
.15/.25 |
Sulfur |
.040 Max |
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Chromium |
.75/1.20 |
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SIZE AVAILABILITY
Flats - Rounds - Squares - Hollowbar
Standard Sizes - Non-Standard Sizes - Metric Sizes
FORGING
Heat slowly and uniformly to a temperature of from 2000-2200° F. Do not
forge or roll below 1800° F.
ANNEALING
Heat slowly to 1550-1600° F and hold for 1-1/2 hour per inch of thickness.
Furnace cool at 20° F per hour to 1230° F; air cool to room temperature.
Expected Brinell hardness 197 max.
HEAT TREATING
Heat to 1500-1600° F and hold 1-1/2 hour per inch of greatest thickness.
Quench into 150° F oil.
TEMPERING
Temper immediately after quenching, before the part has cooled to below 150°
F. Parts should be held 1 hour per inch of thickness, 2 hours minimum. A single
temper is sufficient. The following tempering table may be used as a guide. However,
since .112" dia. specimens were used for this test, it may be found that heavier
sections are several points lower.
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Tempering Temp. (F) As-quenched
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Hardness Rc
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60
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400
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57
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500
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53
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600
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49
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700
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46
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800
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42
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900
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38
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1000
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34
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1100
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31
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1200
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27
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1300
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23
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Data is typical and should not be construed as actual values for any catagory.
Applications and technical information require engineers and tool designers to exercise
independent judgement.
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