Bohler-Uddeholm BÖHLER M268 VMR® Plastic Mold Steel

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Bohler-Uddeholm BÖHLER M268 VMR® Plastic Mold Steel
Categories:	Metal; Ferrous Metal; Tool Steel; Mold Steel
Material Notes:	Description: HBÖHLER M268 VMR is a hardened and tempered plastic mould steel with excellent cleanliness for best polishability. The hardness is constant over the entire cross-section of the steel block, even at large sizes, due to the addition of nickel. Applications: Moulds for plastics processing, components for general mechanical engineering and tool manufacture where highest polishability and fatigue strength are required.
Key Words:	EN 1.2738; AISI P20; 40CrMnNiMo8-6-4
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Physical Properties	Metric	English	Comments

Density	7.85 g/cc	0.284 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	310 - 350	310 - 350
Modulus of Elasticity	210 GPa	30500 ksi

Thermal Properties	Metric	English	Comments
CTE, linear	12.8 µm/m-°C @Temperature 100 °C	7.11 µin/in-°F @Temperature 212 °F
	13.0 µm/m-°C @Temperature 200 °C	7.22 µin/in-°F @Temperature 392 °F
	13.8 µm/m-°C @Temperature 300 °C	7.67 µin/in-°F @Temperature 572 °F
	14.0 µm/m-°C @Temperature 400 °C	7.78 µin/in-°F @Temperature 752 °F
	14.2 µm/m-°C @Temperature 500 °C	7.89 µin/in-°F @Temperature 932 °F
	14.2 µm/m-°C @Temperature 600 °C	7.89 µin/in-°F @Temperature 1110 °F
	14.5 µm/m-°C @Temperature 700 °C	8.06 µin/in-°F @Temperature 1290 °F
Specific Heat Capacity	0.460 J/g-°C	0.110 BTU/lb-°F
Thermal Conductivity	28.0 W/m-K @Temperature 700 °C	194 BTU-in/hr-ft²-°F @Temperature 1290 °F
	31.1 W/m-K @Temperature 600 °C	216 BTU-in/hr-ft²-°F @Temperature 1110 °F
	32.8 W/m-K @Temperature 500 °C	228 BTU-in/hr-ft²-°F @Temperature 932 °F
	33.9 W/m-K @Temperature 400 °C	235 BTU-in/hr-ft²-°F @Temperature 752 °F
	34.3 W/m-K @Temperature 20.0 °C	238 BTU-in/hr-ft²-°F @Temperature 68.0 °F
	34.8 W/m-K @Temperature 300 °C	242 BTU-in/hr-ft²-°F @Temperature 572 °F
	35.1 W/m-K @Temperature 100 °C	244 BTU-in/hr-ft²-°F @Temperature 212 °F
	35.3 W/m-K @Temperature 200 °C	245 BTU-in/hr-ft²-°F @Temperature 392 °F

Component Elements Properties	Metric	English	Comments
Carbon, C	0.38 %	0.38 %
Chromium, Cr	2.0 %	2.0 %
Iron, Fe	94.52 %	94.52 %	As remainder
Manganese, Mn	1.5 %	1.5 %
Molybdenum, Mo	0.20 %	0.20 %
Nickel, Ni	1.1 %	1.1 %
Silicon, Si	0.30 %	0.30 %

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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NBUCOR69 / 133742

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