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Ensinger PEI

Crucible Steel HALGRAPH® Tool Steel, AISI O6
Categories: Metal; Ferrous Metal; Tool Steel; Oil-Hardening Steel
Material Notes: Halgraph is an oil-hardening graphitic tool steel with excellent non-deforming properties. Free graphite in its structure affords exceptional free-machining properties. The combination of graphite and hard carbides give Halgraph tools excellent resistance to adhesive wear (galling) in applications such as ring gauges, plug gauges, and bushings.

Information provided by Crucible Industries
Key Words: AISI O6
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Density 7.70 g/cc0.278 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 187 - 221187 - 221
Hardness, Rockwell C 64 - 6664 - 66hardened at 1475°F then quenched
 45 - 47
@Tempering Temp. 482 °C		45 - 47
@Tempering Temp. 900 °F		hardened at 1475F then tempered
 49 - 51
@Tempering Temp. 427 °C		49 - 51
@Tempering Temp. 800 °F		hardened at 1475F then tempered
 53 - 55
@Tempering Temp. 371 °C		53 - 55
@Tempering Temp. 700 °F		hardened at 1475F then tempered
 55 - 57
@Tempering Temp. 343 °C		55 - 57
@Tempering Temp. 650 °F		hardened at 1475F then tempered
 57 - 59
@Tempering Temp. 288 °C		57 - 59
@Tempering Temp. 550 °F		hardened at 1475F then tempered
 57 - 59
@Tempering Temp. 316 °C		57 - 59
@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
 59 - 61
@Tempering Temp. 232 °C		59 - 61
@Tempering Temp. 450 °F		hardened at 1475F then tempered
 60 - 62
@Tempering Temp. 204 °C		60 - 62
@Tempering Temp. 400 °F		hardened at 1475F then tempered
 61 - 63
@Tempering Temp. 177 °C		61 - 63
@Tempering Temp. 350 °F		hardened at 1475F then tempered
 62 - 64
@Tempering Temp. 149 °C		62 - 64
@Tempering Temp. 300 °F		hardened at 1475F then tempered
Modulus of Elasticity 207 GPa30000 ksi
Charpy Impact  27.1 J
@Tempering Temp. 149 °C		20.0 ft-lb
@Tempering Temp. 300 °F		hardened at 1475°F then tempered; C-notch
 27.1 J
@Tempering Temp. 260 °C		20.0 ft-lb
@Tempering Temp. 500 °F		hardened at 1475°F then tempered; C-notch
 36.6 J
@Tempering Temp. 204 °C		27.0 ft-lb
@Tempering Temp. 400 °F		hardened at 1475°F then tempered; C-notch
 36.6 J
@Tempering Temp. 316 °C		27.0 ft-lb
@Tempering Temp. 600 °F		hardened at 1475°F then tempered; C-notch
 47.5 J
@Tempering Temp. 371 °C		35.0 ft-lb
@Tempering Temp. 700 °F		hardened at 1475°F then tempered; C-notch
 56.9 J
@Tempering Temp. 427 °C		42.0 ft-lb
@Tempering Temp. 800 °F		hardened at 1475°F then tempered; C-notch
 71.9 J
@Tempering Temp. 482 °C		53.0 ft-lb
@Tempering Temp. 900 °F		hardened at 1475°F then tempered; C-notch
 
Thermal PropertiesMetricEnglishComments
CTE, linear  11.2 µm/m-°C
@Temperature 21.1 - 204 °C		6.20 µin/in-°F
@Temperature 70.0 - 400 °F
 12.1 µm/m-°C
@Temperature 21.1 - 316 °C		6.70 µin/in-°F
@Temperature 70.0 - 600 °F
 12.8 µm/m-°C
@Temperature 21.1 - 427 °C		7.10 µin/in-°F
@Temperature 70.0 - 800 °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 751.7 °C1385 °FCritical Thermal Treatment Temperature
 
Component Elements PropertiesMetricEnglishComments
Carbon, C 1.5 %1.5 %
Iron, Fe 96.45 %96.45 %as balance
Manganese, Mn 0.75 %0.75 %
Molybdenum, Mo 0.30 %0.30 %
Silicon, Si 1.0 %1.0 %

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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