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DeCarb
Free Tool Steel Bar
AISI
D-2
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Description
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D-2
is an air-hardening, high carbon, high chromium tool steel with
extremely high wear resisting properties. It is a very deep hardening
steel and will be practically free from size change after proper
treatment. The high percentage of chromium gives it mild corrosion-resisting
properties in the hardened condition.
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| Typical
Applications |
- Blanking
Dies
- Forming
Dies
- Coining
Die
- Slitting
Cutters
- Heading
Tools
- Long
Punches
- Forming
Rolls
- Edging
Rolls
- Master
Tools
- Beading
Rolls
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- Intricate
Punches
- Extrusion
Dies
- Drawing
Dies
- Lamination
Dies
- Thread
Rolling Dies
- Shear
Blades
- Burnishing
Tools
- Gauges
- Knurls
-
Wear Parts
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| Chemical
Composition |
- Carbon:
1.40 / 1.60
- Manganese:
.60 max.
- Silicon:
.60 max.
- Tungsten:
--
- Molybdenum:
.70 / 1.20
- Chromium:
11.00 / 13.00
- Vanadium:
1.10 max.
- Cobalt:
1.00 max.
- Nickel:
.30 max.
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| Heat
Treatment Data |
- Forging:
(note
a)
-
Start forging at 1850-2000°F (1010-1093°C)
- Do
not forge below 1700°F (927°C)
- Normalizing:
(note
b)
- Annealing:
(note
c)
-
Temperature: 1600-1650°F (871-899°C)
- Rate
of cooling, max. per hour: 40°F (22°C)
- Typical
annealed hardness, Brinell: 217-255
- Hardening:
- Rate
of heating: Very Slowly
- Preheat
temperature: 1500°F (816°C)
- Hardening
temperature: 1800-1875°F (982-1024°C)
- Time
at temperature, minutes: 15-45 (note
j)
- Quenching
medium: A (note
i)
- Tempering:
- Tempering
temperature: 400-1000°F (204-538°C)
- Approx.
tempered hardness, Rockwell C: 54-61
- Wear
Resistance: High to very high
- Toughness:
Low
- Resistance
to Softening Effect of Elevated Temperature:
Medium
to high
- Depth
of Hardening: Deep
- Machinability:
Low
- Grindability:
Low
- Distortion
in Heat Treating: Lowest
- Safety
in Hardening: Highest
- Resistance
to Decarburization: Medium
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