JIS SKH51 Molybdenum High Speed Tool Steel

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JIS SKH51 Molybdenum High Speed Tool Steel
Categories:	Metal; Ferrous Metal; Tool Steel; Cold Work Steel
Key Words:	JIS G4403(83) SKH51, SKH 51, SKH-51; Comparable to SKH9 (obsolete), AISI M2 Tool Steel, UNS T11302
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Physical Properties	Metric	English	Comments

Density	8.14 g/cc	0.294 lb/in³	(AISI M2)

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	<= 255	<= 255	Bar/Forging Annealed
Modulus of Elasticity	207 GPa	30000 ksi	(AISI M2)
Charpy Impact	31.2 - 38.0 J	23.0 - 28.0 ft-lb	Austenitized and Tempered

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000540 ohm-cm	0.0000540 ohm-cm	(AISI M2)

Thermal Properties	Metric	English	Comments
CTE, linear	11.5 µm/m-°C @Temperature 20.0 - 100 °C	6.39 µin/in-°F @Temperature 68.0 - 212 °F	(AISI M2)
	11.7 µm/m-°C @Temperature 20.0 - 200 °C	6.50 µin/in-°F @Temperature 68.0 - 392 °F	(AISI M2)
	12.2 µm/m-°C @Temperature 20.0 - 300 °C	6.78 µin/in-°F @Temperature 68.0 - 572 °F	(AISI M2)
	12.4 µm/m-°C @Temperature 20.0 - 400 °C	6.89 µin/in-°F @Temperature 68.0 - 752 °F	(AISI M2)
	12.7 µm/m-°C @Temperature 20.0 - 500 °C	7.06 µin/in-°F @Temperature 68.0 - 932 °F	(AISI M2)
	12.9 µm/m-°C @Temperature 20.0 - 700 °C	7.17 µin/in-°F @Temperature 68.0 - 1290 °F	(AISI M2)
	13.0 µm/m-°C @Temperature 20.0 - 600 °C	7.22 µin/in-°F @Temperature 68.0 - 1110 °F	(AISI M2)
Specific Heat Capacity	0.460 J/g-°C	0.110 BTU/lb-°F	(AISI M2)
Thermal Conductivity	19.0 W/m-K	132 BTU-in/hr-ft²-°F	(AISI M2)

Component Elements Properties	Metric	English	Comments
Carbon, C	0.80 - 0.90 %	0.80 - 0.90 %
Chromium, Cr	3.8 - 4.5 %	3.8 - 4.5 %
Copper, Cu	<= 0.25 %	<= 0.25 %
Iron, Fe	79 - 83.8 %	79 - 83.8 %	As Balance
Manganese, Mn	<= 0.40 %	<= 0.40 %
Molybdenum, Mo	4.5 - 5.5 %	4.5 - 5.5 %
Nickel, Ni	<= 0.25 %	<= 0.25 %
Phosphorus, P	<= 0.030 %	<= 0.030 %
Silicon, Si	<= 0.40 %	<= 0.40 %
Sulfur, S	<= 0.030 %	<= 0.030 %
Tungsten, W	5.5 - 6.7 %	5.5 - 6.7 %
Vanadium, V	1.6 - 2.2 %	1.6 - 2.2 %

References for this datasheet.

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MSTZJSKH51 / 231080

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