Bohler-Uddeholm BÖHLER RAMAX® HH Modified 420F

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Bohler-Uddeholm BÖHLER RAMAX® HH Modified 420F
Categories:	Metal; Ferrous Metal; Stainless Steel; T 400 Series Stainless Steel
Material Notes:	Chromium alloyed steel Typical applications for Ramax® HH are: holders and bolsters for plastic molds, plastic and rubber molds with low requirements on polishability, and dies for plastic extrusion. RAMAX® HH is characterized by: Excellent machinability Good corrosion resistance Good hardenability Uniform hardness in all directions Good indentation resistance
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Physical Properties	Original Value	Comments

Density	0.280 lb/in³	hardened and tempered to 350 HB

Mechanical Properties	Original Value	Comments
Hardness, Brinell	340	Hardened and tempered (Delivery condition)
	275 - 475	tempering temp 390-1110°F
Tensile Strength, Ultimate	165000 psi	(hardened to 350 HB)
	148000 psi @Temperature 199 °C	(hardened to 350 HB)
Tensile Strength, Yield	144000 psi @Strain 0.2 %	68°F (hardened to 350 HB)
	133000 psi @Strain 0.2 %, Temperature 199 °C	hardened to 350 HB
Elongation at Break	12 %	(hardened to 350 HB)
	10 % @Temperature 199 °C	hardened to 350 HB
Reduction of Area	46 % @Temperature 20.0 °C	hardened to 350 HB
	48 % @Temperature 199 °C	hardened to 350 HB
Modulus of Elasticity	31200 ksi	68°F, (hardened and tempered to 350 HB)
	29700 ksi @Temperature 199 °C	hardened and tempered to 350 HB
Impact Test	133 ft-lb	unnotched

Thermal Properties	Original Value	Comments
CTE, linear	6.00 µin/in-°F @Temperature 199 °C	hardened and tempered to 350 HB
Specific Heat Capacity	0.110 BTU/lb-°F @Temperature 20.0 °C	hardened and tempered to 350 HB
Thermal Conductivity	24.0 W/m-K @Temperature 199 °C	hardened and tempered to 350 HB

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NBUCOR70 / 133785

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