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Bohler-Uddeholm UDDEHOLM QRO® 90 SUPREME Hot Work Tool Steel

Category Metal , Ferrous Metal , Alloy Steel , Chrome-moly Steel , Tool Steel , Hot Work Steel
Manufacturer Bohler-Uddeholm
Trade Name UDDEHOLM
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Bohler-Uddeholm UDDEHOLM QRO® 90 SUPREME Hot Work Tool Steel.pdf
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Material Notes:
Chromium-molybdenum-vanadium alloyed steelQRO® 90 SUPREME is a premium hot work die steel with high hot yield strength and very good temper resistance. Especially suited for die casting of aluminum, copper and brass.QRO® 90 SUPREME is characterized by: Excellent high temperature strength and hot hardness Very good temper resistance Unique resistance to thermal fatigue Excellent thermal conductivity Good toughness and ductility in longitudinal and transverse directions Uniform machinability Good heat treatment propertiesApplications: Die Casting Dies and Associated Tooling, Extrusion dies and Extrusion Tooling and Forging dies
Physical Properties Metric English Comments
Density 7.78 g/cc
0.281 lb/in³
hardness of 45 HRC
7.58 g/cc

@Temperature 599 °C
0.274 lb/in³

@Temperature 1110 °F
hardness of 45 HRC
7.67 g/cc

@Temperature 399 °C
0.277 lb/in³

@Temperature 750 °F
hardness of 45 HRC
Mechanical Properties Metric English Comments
Hardness, Brinell 180
180
Soft annealed (Delivery condition)
Tensile Strength, Ultimate 1250 MPa
181000 psi
hardness of 40 HRC
1470 MPa
213000 psi
hardness of 45 HRC
1620 MPa
235000 psi
hardness of 48 HRC
Tensile Strength, Yield 1100 MPa

@Strain 0.200 %
160000 psi

@Strain 0.200 %
hardness of 40 HRC
1270 MPa

@Strain 0.200 %
184000 psi

@Strain 0.200 %
hardness of 45 HRC
1400 MPa

@Strain 0.200 %
203000 psi

@Strain 0.200 %
hardness of 48 HRC
Modulus of Elasticity 210 GPa
30500 ksi
(hardness of 45 HRC)
140 GPa

@Temperature 599 °C
20300 ksi

@Temperature 1110 °F
hardness of 45 HRC
180 GPa

@Temperature 399 °C
26100 ksi

@Temperature 750 °F
hardness of 45 HRC
Charpy Impact 17.6 J

@Temperature 98.9 °C
13.0 ft-lb

@Temperature 210 °F
V-notch
47.5 J

@Temperature 599 °C
35.0 ft-lb

@Temperature 1110 °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 45 HRC
13.1 µm/m-°C

@Temperature 599 °C
7.30 µin/in-°F

@Temperature 1110 °F
hardened to 45 HRC
Thermal Conductivity 33.0 W/m-K

@Temperature 399 °C
229 BTU-in/hr-ft²-°F

@Temperature 750 °F
hardness of 45 HRC
33.0 W/m-K

@Temperature 599 °C
229 BTU-in/hr-ft²-°F

@Temperature 1110 °F
hardness of 45 HRC
Component Elements Properties Metric English Comments
Carbon, C 0.38 %
0.38 %
Chromium, Cr 2.6 %
2.6 %
Manganese, Mn 0.75 %
0.75 %
Molybdenum, Mo 2.25 %
2.25 %
Silicon, Si 0.30 %
0.30 %
Vanadium, V 0.90 %
0.90 %
Processing Properties Metric English Comments
Processing Temperature 1029 °C
1885 °F
heated for 30 min, then quenched in air and tempered 2 + 2 h at 1190°F (hardness = 45 HRC)
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