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Ensinger PEI

Crucible Steel KETOS® Tool Steel, AISI O1
Categories: Metal; Ferrous Metal; Tool Steel; Oil-Hardening Steel
Material Notes: 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.

Information provided by Crucible Industries
Key Words: AISI O1
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Physical PropertiesMetricEnglishComments
Density 7.83 g/cc0.283 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 187 - 221187 - 221
Hardness, Rockwell C 63 - 6563 - 65hardened at 1475°F then quenched
 39 - 41
@Tempering Temp. 538 °C		39 - 41
@Tempering Temp. 1000 °F		hardened at 1475F then tempered
 43 - 45
@Tempering Temp. 482 °C		43 - 45
@Tempering Temp. 900 °F		hardened at 1475F then tempered
 48 - 50
@Tempering Temp. 427 °C		48 - 50
@Tempering Temp. 800 °F		hardened at 1475F then tempered
 51 - 53
@Tempering Temp. 371 °C		51 - 53
@Tempering Temp. 700 °F		hardened at 1475F then tempered
 55 - 57
@Tempering Temp. 316 °C		55 - 57
@Tempering Temp. 600 °F		hardened at 1475F then tempered
 58 - 60
@Tempering Temp. 260 °C		58 - 60
@Tempering Temp. 500 °F		hardened at 1475F then tempered
 60 - 62
@Tempering Temp. 232 °C		60 - 62
@Tempering Temp. 450 °F		hardened at 1475F then tempered
 61 - 63
@Tempering Temp. 204 °C		61 - 63
@Tempering Temp. 400 °F		hardened at 1475F then tempered
 62 - 64
@Tempering Temp. 177 °C		62 - 64
@Tempering Temp. 350 °F		hardened at 1475F then tempered
 63 - 65
@Tempering Temp. 149 °C		63 - 65
@Tempering Temp. 300 °F		hardened at 1475F then tempered
Modulus of Elasticity 207 GPa30000 ksi
Charpy Impact  19.0 J
@Tempering Temp. 149 °C		14.0 ft-lb
@Tempering Temp. 300 °F		hardened at 1475°F then tempered; C-notch
 38.0 J
@Tempering Temp. 177 °C		28.0 ft-lb
@Tempering Temp. 350 °F		hardened at 1475°F then tempered; C-notch
 40.7 J
@Tempering Temp. 204 °C		30.0 ft-lb
@Tempering Temp. 400 °F		hardened at 1475°F then tempered; C-notch
 40.7 J
@Tempering Temp. 260 °C		30.0 ft-lb
@Tempering Temp. 500 °F		hardened at 1475°F then tempered; C-notch
 43.4 J
@Tempering Temp. 316 °C		32.0 ft-lb
@Tempering Temp. 600 °F		hardened at 1475°F then tempered; C-notch
 
Thermal PropertiesMetricEnglishComments
CTE, linear  12.6 µm/m-°C
@Temperature 21.1 - 204 °C		7.00 µin/in-°F
@Temperature 70.0 - 400 °F
 13.3 µm/m-°C
@Temperature 21.1 - 427 °C		7.40 µin/in-°F
@Temperature 70.0 - 800 °F
 14.0 µm/m-°C
@Temperature 21.1 - 538 °C		7.80 µin/in-°F
@Temperature 70.0 - 1000 °F
Thermal Conductivity 34.5 W/m-K
@Temperature 95.0 °C		239 BTU-in/hr-ft²-°F
@Temperature 203 °F
 
Processing PropertiesMetricEnglishComments
Processing Temperature 743 °C1370 °FCritical Thermal Treatment Temperature
 
Component Elements PropertiesMetricEnglishComments
Carbon, C 0.90 %0.90 %
Chromium, Cr 0.50 %0.50 %
Iron, Fe 96.55 %96.55 %as balance
Manganese, Mn 1.25 %1.25 %
Silicon, Si 0.30 %0.30 %
Tungsten, W 0.50 %0.50 %

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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