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KETOS®
(AISI O1)
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Ketos is an oil-hardening tool steel which may be hardened from fairly low
temperatures with little size change. This grade combines deep-hardening
qualities with a fine-grained structure, affording good initial production
runs, and good continued production after grinding.
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Typical Chemistry |
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Carbon |
0.90% |
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Manganese |
1.25% |
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Silicon |
0.30% |
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Chromium |
0.50% |
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Tungsten |
0.50% |
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Typical Applications |
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Blanking Dies |
Jewelers Hobs |
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Engraving Tools |
Paper Knives |
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Forming Tools |
Taps (Hand) |
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Gauges |
Trim Dies |
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Hardening
Note: Full hardness will only be attained in sections less than about 3
inches thick.
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Critical Temperature: 1370F(745C).
Preheat: 1250/1350F(675/730C)
High Heat: 1450/1500F(790/815C), hold 10/30 minutes at temperature.
Quench: Quench in oil to hand warm, 150F(65C).
Temper: 350/600F(175/315C); hold one hour per inch of thickness,
two hours minimum, four hours preferred.
Cryogenic treatments: Refrigeration treatments may improve
long-term dimensional stability by transforming retained austenite.
Refrigeration treatments should be performed after at least one temper, to
minimize risk of cracking, and should always be followed by a temper.
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Typical Properties
Hardness and Impact Toughness Data
Oil Quenched from 1475F(800C).
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Tempering
- Temp.
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Hardness
HRC
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Toughness,
Charpy C-notch
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- °F
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- °C
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ft-lbs
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Joules
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AQ |
63-65 |
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300 |
150 |
63-65 |
14 |
19 |
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