Bohler-Uddeholm BÖHLER W400 VMR® H11 Hot Work Tool Steel

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Bohler-Uddeholm BÖHLER W400 VMR® H11 Hot Work Tool Steel
Categories:	Metal; Ferrous Metal; Tool Steel; Hot Work Steel
Material Notes:	W400 VMR is a low silicon, chromium-vanadium hot work tool steel which has been vacuum remelted to obtain the highest uniformity, the best cleanliness of tool steel. The material is characterized: Extremely high toughness, with a minimum of 18 ft-lbs Room temperature Charpy V notch toughness levels Good general wear resistance, capable of achieving up to 52 HRC Good hot wear resistance with higher hardness Very good thermal conductivity Excellent polishability Extremely good uniformity of properties in all directions Applications: Heavy duty hot work tools and dies, aluminum and zinc, where cracking is a major issue Mandrels, dies, and containers for metal tube and rod extrusion Hot extrusion dies Hot shear blades Plastic molds requiring high polishability Molds requiring improved cycle times Cold work tooling with severe cracking issues
Key Words:	EN/DIN 1.2343, X37CrMoV5-1; BS BH11; UNE F5317, X37CrMoSiV5; UNS T20811; JIS 4Ch5MFS
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Physical Properties	Metric	English	Comments

Density	7.60 g/cc @Temperature 600 °C	0.275 lb/in³ @Temperature 1110 °F
	7.64 g/cc @Temperature 500 °C	0.276 lb/in³ @Temperature 932 °F
	7.80 g/cc @Temperature 20.0 °C	0.282 lb/in³ @Temperature 68.0 °F

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	<= 205	<= 205	as delivered
Hardness, Rockwell C	52	52	hardened 990°C
	54	54	hardened 990°C then tempered 520°C
Modulus of Elasticity	165 GPa @Temperature 600 °C	23900 ksi @Temperature 1110 °F
	176 GPa @Temperature 500 °C	25500 ksi @Temperature 932 °F
	215 GPa @Temperature 20.0 °C	31200 ksi @Temperature 68.0 °F

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000520 ohm-cm @Temperature 20.0 °C	0.0000520 ohm-cm @Temperature 68.0 °F
	0.0000860 ohm-cm @Temperature 500 °C	0.0000860 ohm-cm @Temperature 932 °F
	0.0000960 ohm-cm @Temperature 600 °C	0.0000960 ohm-cm @Temperature 1110 °F

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
	12.0 µm/m-°C @Temperature 20.0 - 200 °C	6.67 µin/in-°F @Temperature 68.0 - 392 °F
	12.2 µm/m-°C @Temperature 20.0 - 300 °C	6.78 µin/in-°F @Temperature 68.0 - 572 °F
	12.5 µm/m-°C @Temperature 20.0 - 400 °C	6.94 µin/in-°F @Temperature 68.0 - 752 °F
	12.9 µm/m-°C @Temperature 20.0 - 500 °C	7.17 µin/in-°F @Temperature 68.0 - 932 °F
	13.0 µm/m-°C @Temperature 20.0 - 600 °C	7.22 µin/in-°F @Temperature 68.0 - 1110 °F
	13.2 µm/m-°C @Temperature 20.0 - 700 °C	7.33 µin/in-°F @Temperature 68.0 - 1290 °F
Specific Heat Capacity	0.460 J/g-°C @Temperature 20.0 °C	0.110 BTU/lb-°F @Temperature 68.0 °F
	0.550 J/g-°C @Temperature 500 °C	0.131 BTU/lb-°F @Temperature 932 °F
	0.590 J/g-°C @Temperature 600 °C	0.141 BTU/lb-°F @Temperature 1110 °F
Thermal Conductivity	29.6 W/m-K @Temperature 700 °C	205 BTU-in/hr-ft²-°F @Temperature 1290 °F
	30.5 W/m-K @Temperature 600 °C	212 BTU-in/hr-ft²-°F @Temperature 1110 °F
	32.1 W/m-K @Temperature 500 °C	223 BTU-in/hr-ft²-°F @Temperature 932 °F
	32.1 W/m-K @Temperature 100 °C	223 BTU-in/hr-ft²-°F @Temperature 212 °F
	32.6 W/m-K @Temperature 200 °C	226 BTU-in/hr-ft²-°F @Temperature 392 °F
	32.6 W/m-K @Temperature 400 °C	226 BTU-in/hr-ft²-°F @Temperature 752 °F
	32.8 W/m-K @Temperature 300 °C	228 BTU-in/hr-ft²-°F @Temperature 572 °F

Component Elements Properties	Metric	English	Comments
Carbon, C	0.37 %	0.37 %
Chromium, Cr	5.0 %	5.0 %
Iron, Fe	92.33 %	92.33 %	As Balance
Manganese, Mn	0.30 %	0.30 %
Molybdenum, Mo	1.3 %	1.3 %
Silicon, Si	0.20 %	0.20 %
Vanadium, V	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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NBUCOR51 / 98130

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