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Bohler-Uddeholm BÖHLER W303 ISODISC® Hot Work Tool Steel
Categories: Metal; Ferrous Metal; Tool Steel; Hot Work Steel
Material Notes: Description: Hot work tool steel featuring excellent hot tensile properties, high retention of hardness, good toughness and resistance to heat checking, admits water cooling. BOHLER W303 is also available in the special grades ISODISC and ISOBLOC with improved homogeneity and increased toughness.

Applications: Heavy duty hot work tools and dies, mainly for light alloy processing: mandrels, dies and containers for metal tube and rod extrusion; hot extrusion equipment; tools and dies for the manufacture of hollow bodies, screws, rivets, nuts and bolts. Die casting equipment, forming dies, die inserts, hot shear blades, and plastic molding dies.
Key Words: EN 1.2367; X38CrMoV5-3
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Physical PropertiesOriginal ValueComments
Density 7.65 g/cc
@Temperature 600 °C
 7.69 g/cc
@Temperature 500 °C
 7.85 g/cc
@Temperature 20.0 °C
 
Mechanical PropertiesOriginal ValueComments
Tensile Strength, Ultimate 1100 - 1380 MPa
@Temperature 315 °C		varies with heat treatment
 1200 - 1590 MPa
@Temperature 20.0 °C		varies with heat treatment
Tensile Strength, Yield 900 - 1170 MPa
@Strain 0.2 %,
Temperature 315 °C
 1000 - 1380 MPa
@Strain 0.2 %,
Temperature 20.0 °C
Reduction of Area 50 %
@Temperature 20.0 °C
 50 %
@Temperature 315 °C
Modulus of Elasticity 165 GPa
@Temperature 600 °C
 176 GPa
@Temperature 500 °C
 215 GPa
@Temperature 20.0 °C
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 0.0000500 ohm-cm
@Temperature 20.0 °C
 0.0000590 ohm-cm
@Temperature 600 °C
 0.0000840 ohm-cm
@Temperature 500 °C
 
Thermal PropertiesOriginal ValueComments
CTE, linear 11.5 µm/m-°C
@Temperature 100 °C
 12.0 µm/m-°C
@Temperature 200 °C
 12.2 µm/m-°C
@Temperature 300 °C
 12.5 µm/m-°C
@Temperature 400 °C
 12.9 µm/m-°C
@Temperature 500 °C
 13.0 µm/m-°C
@Temperature 600 °C
 13.2 µm/m-°C
@Temperature 700 °C
Specific Heat Capacity 0.110 BTU/lb-°F
@Temperature 20.0 °C
 0.131 BTU/lb-°F
@Temperature 500 °C
 0.141 BTU/lb-°F
@Temperature 600 °C
Thermal Conductivity 28.8 W/m-K
@Temperature 700 °C		Hardened and tempered
 29.0 W/m-K
@Temperature 100 °C		Hardened and tempered
 29.2 W/m-K
@Temperature 600 °C		Hardened and tempered
 30.4 W/m-K
@Temperature 500 °C		Hardened and tempered
 30.4 W/m-K
@Temperature 200 °C		Hardened and tempered
 31.1 W/m-K
@Temperature 300 °C		Hardened and tempered
 31.1 W/m-K
@Temperature 400 °C		Hardened and tempered
 
Component Elements PropertiesOriginal ValueComments
Carbon, C 0.38 %
Chromium, Cr 5.0 %
Iron, Fe 90.47 %As remainder
Manganese, Mn 0.40 %
Molybdenum, Mo 2.8 %
Silicon, Si 0.40 %
Vanadium, V 0.55 %

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NBUCOR68 / 133741




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