Bohler-Uddeholm UDDEHOLM HOTVAR® Hot Work Tool Steel

Category	Metal , Ferrous Metal , Alloy Steel , Tool Steel , Hot Work Steel
Manufacturer	Bohler-Uddeholm
Trade Name	UDDEHOLM
Port	Ningbo port,China
Trade Terms	FOB, CFR, CIF
Payment Terms	L/C, T/T, Western Union
Download PDF	Bohler-Uddeholm UDDEHOLM HOTVAR® Hot Work Tool Steel.pdf
Price	EMAIL US sales@lookpolymers.com
	Online Service lookpolymers 27660005

Material Notes:

Molybdenum-vanadium alloyed steelHotvar® is a premium hot work steel developed by Uddeholm to provide very good performance in tooling up to 1200°F (650°C). The alloying elements in Hotvar® are balanced to give high hot wear resistance and good high temperature properties. Manufactured by special techniques, Hotvar® is suitable for applications where hot wear and/or plastic deformation are the dominating failure mechanisms.Hotvar is characterized by: High hot wear resistance Very good high temperature properties High resistance to thermal fatigue Very good temper resistance Very good thermal conductivityApplications: Uddeholm Hotvar is a hot-work tool steel suitable for applications where hot wear and/or plastic deformation are the dominating failure mechanisms. Applications and tools of especial interest:Warm forging, dies and punchesRoll forging, rolling segmentsRock orbital forging, punches and diesUpset forging, clamping toolsProgressive forging, diesAxial closed die rolling, top and bottom diesCross forming, segmentsHot bending, toolsHot calibration, toolsZinc die casting, diesAl-tube extrusion

Physical Properties	Metric	English	Comments
Density	7.78 g/cc	0.281 lb/in³	hardness of 56 HRC
	7.58 g/cc @Temperature 599 °C	0.274 lb/in³ @Temperature 1110 °F	hardness of 56 HRC
	7.67 g/cc @Temperature 399 °C	0.277 lb/in³ @Temperature 750 °F	hardness of 56 HRC

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	210	210	Soft annealed
Hardness, Rockwell C	54 - 58	54 - 58
Tensile Strength, Ultimate	2100 MPa	305000 psi	hardness of 54 HRC
	2210 MPa	320000 psi	hardness of 56 HRC
	2310 MPa	335000 psi	hardness of 58 HRC
Tensile Strength, Yield	1790 MPa @Strain 0.200 %	260000 psi @Strain 0.200 %	hardness of 52 HRC
	1830 MPa @Strain 0.200 %	265000 psi @Strain 0.200 %	hardness of 56 HRC
	1860 MPa @Strain 0.200 %	270000 psi @Strain 0.200 %	hardness of 58 HRC
Modulus of Elasticity	210 GPa	30500 ksi	(hardness of 56 HRC)
	140 GPa @Temperature 599 °C	20300 ksi @Temperature 1110 °F	hardness of 56 HRC
	180 GPa @Temperature 399 °C	26100 ksi @Temperature 750 °F	hardness of 56 HRC
Charpy Impact	11.9 J @Temperature 98.9 °C	8.80 ft-lb @Temperature 210 °F	V-notch
	16.3 J @Temperature 399 °C	12.0 ft-lb @Temperature 750 °F	V-notch

Thermal Properties	Metric	English	Comments
CTE, linear	12.6 µm/m-°C @Temperature 399 °C	7.00 µin/in-°F @Temperature 750 °F	hardness of 56 HRC
	13.1 µm/m-°C @Temperature 599 °C	7.30 µin/in-°F @Temperature 1110 °F	hardened to 56 HRC
Thermal Conductivity	31.0 W/m-K	215 BTU-in/hr-ft²-°F	hardness of 56 HRC
	33.0 W/m-K @Temperature 399 °C	229 BTU-in/hr-ft²-°F @Temperature 750 °F	hardness of 56 HRC
	33.0 W/m-K @Temperature 599 °C	229 BTU-in/hr-ft²-°F @Temperature 1110 °F	hardness of 56 HRC

Component Elements Properties	Metric	English
Carbon, C	0.55 %	0.55 %
Chromium, Cr	2.6 %	2.6 %
Manganese, Mn	0.75 %	0.75 %
Molybdenum, Mo	2.25 %	2.25 %
Silicon, Si	1.0 %	1.0 %
Vanadium, V	0.85 %	0.85 %

Processing Properties	Metric	English	Comments
Processing Temperature	1050 °C	1920 °F	hardening temperature, then quenched in air and tempered 2 + 2 h at 1070°F (hardness = 56 HRC)

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