O-1
Chemical
Analysis: |
|
|
Tempering Temp.
º(F) |
Hardness Rc |
|
Carbon
|
.85/1.00
|
|
As-quenched |
65.0 |
| Manganese |
1.40/1.80 |
|
300 |
63.0 |
| Phosphorus |
.030
Max. |
|
350 |
62.5 |
| Sulfur |
.030
Max. |
|
400 |
62.0 |
| Silicon |
.50 Max. |
|
500 |
60.0 |
| Chromium |
.40/.60 |
|
600 |
57.0 |
| Vanadium |
.030
Max. |
|
700 |
53.0 |
| Tungsten |
.40/.60 |
|
800 |
50.0 |
| Molybdenum |
------- |
|
900 |
47.0 |
| Cobalt |
------- |
|
1000 |
44.0 |
|
|
|
1100 |
39.0 |
|
|
|
1200 |
31.0 |
Uses:
Punches, dies, trim dies, blanking dies, forming dies,
stamping dies, label dies.
Forging/Rolling:
Preheat to 1200° F
and hold for uniformity. Then raise to 1850°
F - 1950° F. Do not forge or roll below 1500° F, cool slowly from the forging or rolling temperature.
Do not normalize.
Annealing:
Heat slowly to 1450° F
and soak thoroughly. Furnace cool slowly at a rate of 20°
F per hour to 900° F, remove
and air cool. Expected Brinell hardness 202 max.
Hardening:
Heat to 1475° F and
hold 1/2 hour per inch of greatest thickness. Large parts should
be preheated at 1200° F and held for uniformity before raising to
the hardening temperature. Oil quench 150°
F and temper without delay.
Tempering:
Temper before the parts have cooled to below 150° F. Small parts should be held a minimum of 1 hour
per inch of greatest thickness and large parts 2 hours per inch of greatest
thickness. A single temper is sufficient, but double tempering
is a good insurance policy. For most applications a tempering
temperature of from 350° F - 450°
F is usually specified for the O-1 analysis. The above
tempering table may be used as a guide. However, since 1/2"
dia. specimens were used for this test, it may be found that heavier
sections are several points lower.
© Copyright 1999 Diamond Metals Corporation.
All Rights Reserved.
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