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Bohler-Uddeholm BÖHLER M303 EXTRA Plastic Mold Steel
Categories: Metal; Ferrous Metal; Tool Steel; Mold Steel
Material Notes: BOHLER M303 EXTRA is a stainless martensitic chromium steel, offering excellent toughness, corrosion and wear resistance. It is characterized by improved machinability and polishability. BOHLER M303 EXTRA was developed for improved homogeneity over DIN 1.2316 by reducing delta ferrite in the matrix, ensuring excellent usage properties.

Applications

  • Molds for chemically aggressive plastics
  • Molds for household appliances
  • Vinyl Extrusion tools
  • Molds for fittings
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Density 7.70 g/cc0.278 lb/in³
 7.60 g/cc
@Temperature 400 °C		0.275 lb/in³
@Temperature 752 °F
 7.60 g/cc
@Temperature 500 °C		0.275 lb/in³
@Temperature 932 °F
 7.60 g/cc
@Temperature 600 °C		0.275 lb/in³
@Temperature 1110 °F
 7.70 g/cc
@Temperature 100 °C		0.278 lb/in³
@Temperature 212 °F
 7.70 g/cc
@Temperature 200 °C		0.278 lb/in³
@Temperature 392 °F
 7.70 g/cc
@Temperature 300 °C		0.278 lb/in³
@Temperature 572 °F
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 290 - 330290 - 330as supplied; hardened and tempered
Hardness, Rockwell C 5353hardening at 1020°C; without tempering
Modulus of Elasticity  168 GPa
@Temperature 600 °C		24400 ksi
@Temperature 1110 °F
 181 GPa
@Temperature 500 °C		26300 ksi
@Temperature 932 °F
 191 GPa
@Temperature 400 °C		27700 ksi
@Temperature 752 °F
 200 GPa
@Temperature 300 °C		29000 ksi
@Temperature 572 °F
 207 GPa
@Temperature 200 °C		30000 ksi
@Temperature 392 °F
 214 GPa
@Temperature 100 °C		31000 ksi
@Temperature 212 °F
 218 GPa
@Temperature 20.0 °C		31600 ksi
@Temperature 68.0 °F
 
Thermal PropertiesMetricEnglishComments
CTE, linear  10.5 µm/m-°C
@Temperature 20.0 - 100 °C		5.83 µin/in-°F
@Temperature 68.0 - 212 °F
 10.8 µm/m-°C
@Temperature 20.0 - 200 °C		6.00 µin/in-°F
@Temperature 68.0 - 392 °F
 11.1 µm/m-°C
@Temperature 20.0 - 300 °C		6.17 µin/in-°F
@Temperature 68.0 - 572 °F
 11.4 µm/m-°C
@Temperature 20.0 - 400 °C		6.33 µin/in-°F
@Temperature 68.0 - 752 °F
 11.7 µm/m-°C
@Temperature 20.0 - 500 °C		6.50 µin/in-°F
@Temperature 68.0 - 932 °F
 12.1 µm/m-°C
@Temperature 20.0 - 600 °C		6.72 µin/in-°F
@Temperature 68.0 - 1110 °F
Specific Heat Capacity  0.460 J/g-°C
@Temperature 20.0 °C		0.110 BTU/lb-°F
@Temperature 68.0 °F
 0.484 J/g-°C
@Temperature 100 °C		0.116 BTU/lb-°F
@Temperature 212 °F
 0.529 J/g-°C
@Temperature 200 °C		0.126 BTU/lb-°F
@Temperature 392 °F
 0.564 J/g-°C
@Temperature 300 °C		0.135 BTU/lb-°F
@Temperature 572 °F
 0.615 J/g-°C
@Temperature 400 °C		0.147 BTU/lb-°F
@Temperature 752 °F
 0.694 J/g-°C
@Temperature 500 °C		0.166 BTU/lb-°F
@Temperature 932 °F
 0.795 J/g-°C
@Temperature 600 °C		0.190 BTU/lb-°F
@Temperature 1110 °F
 
Component Elements PropertiesMetricEnglishComments
Carbon, C 0.27 %0.27 %
Chromium, Cr 14.5 %14.5 %
Iron, Fe 82.4 %82.4 %As Balance
Manganese, Mn 0.65 %0.65 %
Molybdenum, Mo 1.0 %1.0 %
Nickel, Ni 0.85 %0.85 %
Silicon, Si 0.30 %0.30 %

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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