D-2
Chemical
Analysis: |
|
|
Tempering Temp.
º(F) |
Hardness Rc |
|
Carbon
|
1.45/1.50
|
|
As-quenched |
64.0 |
| Manganese |
.60 Max. |
|
400 |
60.0 |
| Phosphorus |
.030
Max. |
|
500 |
58.0 |
| Sulfur |
.030
Max. |
|
600 |
58.0 |
| Silicon |
.60 Max. |
|
700 |
58.0 |
| Chromium |
11.00/13.00 |
|
800 |
57.0 |
| Vanadium |
1.10
Max. |
|
900) |
58.0/60.0 |
| Tungsten |
------- |
|
960) |
|
| Molybdenum |
.70/1.20 |
|
1000 |
56.0 |
| Cobalt |
1.00
Max. |
|
1100 |
48.0 |
|
|
|
1200 |
40.0 |
Uses:
Slitter knives, planer knives, shear blades, plastic
granulator knives, punches, dies, form rolls, rolls, thread roll dies.
Forging/Rolling:
Preheat to 1250° F
and soak thoroughly. Then raise to 1950°
F - 2050° F. Do not forge or roll below 1700° F, cool slowly from the forging or rolling temperature.
Do not normalize.
Annealing:
Heat slowly to 1600° F
- 1650° F, and hold for uniformity. Cool at a
rate of 20° F per hour to 900°
F. Furnace cool slowly. Expected Brinell hardness
229 max.
Hardening:
Preheat to 1200° F
- 1250° F, soak until uniformly heated, and either
transfer or raise furnace temperature to 1850°
F, and hold 1 hour per inch of greatest thickness. Quench
into 150° F oil.
Tempering:
Temper immediately after quenching, before part has
cooled to below 150° F. D-2 parts should always be double
tempered and the parts should be held a minimum of 2 hours per inch
of greatest thickness. For most applications the tempering range
for the D-2 analysis is 900° F - 960° F. 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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