| |
DeCarb
Free Tool Steel Bar
AISI
A-6 |
| Description |
| An
air-hardening, non-deforming tool steel that combines the deep hardening
characteristics of air-hardening steels with the simplicity of low
temperature heat treatment possible in many of the oil-hardening
grades.
|
| Typical
Applications |
- Blanking
Dies
- Precision
tools
- Forming
dies
- Coining
dies
- Master
hubs
- Plastic
molds
- Spindles
- Mandrels
- Heavy
duty punches
- Shear
blades
|
| Chemical
Composition |
- Carbon:
.65 / .75
- Manganese:
1.80 / 2.50
- Silicon:
.50 max.
- Tungsten:
--
- Molybdenum:
.90 / 1.40
- Chromium:
.90 / 1.20
- Vanadium:
--
- Nickel:
.30 max.
|
| Heat
Treatment Data |
- Forging:
(note a)
- Start
forging at: 1900-2050°F (1038-1213°C)
- Do
not forge below: 1600°F (871°C)
- Normalizing:
(note b)
- Annealing:
(note c)
- Temperature:
1350-1375°F (732-746°C)
- Rate
of cooling, max. per hour: 25°F (14°C)
- Typical
annealed hardness, Brinell: 217-248
- Hardening:
- Rate
of heating: Slowly
- Preheat
temperature: 1200°F (649°C)
- Hardening
temperature: 1525-1600°F (829-871°C)
- Time
at temperature, minutes: 20-45 (note j)
- Quenching
medium: A (note i)
- Tempering:
- Tempering
temperature: 300-800°F (149-427°C)
- Approx.
tempered hardness, Rockwell C: 54-60
- Wear
Resistance: Low to Medium
- Toughness:
Medium to High
- Resistance
to Softening Effect of Elevated Temperature: Medium
- Depth
of Hardening: Deep
- Machinability:
Low to Medium
- Grindability:
Medium
- Distortion
in Heat Treating: Lowest
-
Safety in Hardening: Highest
- Resistance
to Decarburization: Medium to High
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