Crucible Steel CRUCIBLE A9 Tool Steel

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Crucible Steel CRUCIBLE A9 Tool Steel
Categories:	Metal; Ferrous Metal; Tool Steel; Air-Hardening Steel
Material Notes:	Crucible A9 is an air-hardening tool steel combining some of characteristics of the 5% chromium hot-work grades (such as H13) with the high attainable hardness and compressive yield strength of the cold-work grades such as A2). Crucible A9 is suitable for hot and cold work applications requiring high toughness, hardness, or heat check resistance, and moderate wear resistance. Information provided by Crucible Industries
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Physical Properties	Metric	English	Comments

Density	7.78 g/cc	0.281 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	217 - 241	217 - 241
Hardness, Rockwell C	47 @Tempering Temp. 593 °C	47 @Tempering Temp. 1100 °F	hardened at 1800°F then tempered
	52.5 @Tempering Temp. 566 °C	52.5 @Tempering Temp. 1050 °F	hardened at 1800°F then tempered
	54.5 @Tempering Temp. 538 °C	54.5 @Tempering Temp. 1000 °F	hardened at 1800°F then tempered
	56 @Tempering Temp. 482 °C	56 @Tempering Temp. 900 °F	hardened at 1800°F then tempered
	56.5 @Tempering Temp. 510 °C	56.5 @Tempering Temp. 950 °F	hardened at 1800°F then tempered
Modulus of Elasticity	207 GPa	30000 ksi
Charpy Impact	67.8 J @Tempering Temp. 482 °C	50.0 ft-lb @Tempering Temp. 900 °F	hardened at 1800°F then tempered; C-notch
	67.8 J @Tempering Temp. 510 °C	50.0 ft-lb @Tempering Temp. 950 °F	hardened at 1800°F then tempered; C-notch
	152 J @Tempering Temp. 538 °C	112 ft-lb @Tempering Temp. 1000 °F	hardened at 1800°F then tempered; C-notch
	182 J @Tempering Temp. 566 °C	134 ft-lb @Tempering Temp. 1050 °F	hardened at 1800°F then tempered; C-notch
	205 J @Tempering Temp. 593 °C	151 ft-lb @Tempering Temp. 1100 °F	hardened at 1800°F then tempered; C-notch

Thermal Properties	Metric	English	Comments
CTE, linear	12.1 µm/m-°C @Temperature 20.0 - 427 °C	6.70 µin/in-°F @Temperature 68.0 - 800 °F
	12.4 µm/m-°C @Temperature 20.0 - 538 °C	6.90 µin/in-°F @Temperature 68.0 - 1000 °F
	12.6 µm/m-°C @Temperature 20.0 - 649 °C	7.00 µin/in-°F @Temperature 68.0 - 1200 °F
Thermal Conductivity	25.8 W/m-K @Temperature 95.0 °C	179 BTU-in/hr-ft²-°F @Temperature 203 °F

Processing Properties	Metric	English	Comments
Processing Temperature	804 °C	1480 °F	Critical Thermal Treatment Temperature

Component Elements Properties	Metric	English	Comments
Carbon, C	0.50 %	0.50 %
Chromium, Cr	5.2 %	5.2 %
Iron, Fe	89.2 %	89.2 %	as balance
Manganese, Mn	0.30 %	0.30 %
Molybdenum, Mo	1.4 %	1.4 %
Nickel, Ni	1.4 %	1.4 %
Silicon, Si	1.0 %	1.0 %
Vanadium, V	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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NCRUC911 / 160362

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