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Ensinger PEI

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Bohler-Uddeholm UDDEHOLM STAVAX® ESR Modified 420
Categories: Metal; Ferrous Metal; Stainless Steel; Tool Steel

Material Notes: Premium grade stainless tool steel

Stavax® ESR is characterized by:

  • Good corrosion resistance
  • Good polishability
  • Good wear resistance
  • Good machinability
  • Good stability in hardening
Applications: Uddeholm Stavax ESR is recommended for all types of moulding tools and its special proper­ ties make it particularly suitable for moulds with the following demands:
  • Corrosion/staining resistance, i.e. for moulding of corrosive materials, e.g. PVC, acetates, and for moulds subjected to humid working/storage conditions.
  • Wear resistance, i.e. for moulding abrasive/ filled materials, including injection-moulded thermosetting grades. Uddeholm Stavax ESR is recommended for moulds with long production runs, e.g. disposable cutlery and containers.
  • High surface finish, i.e. for the production of optical parts, such as camera and sun­ glasses lenses, and for medical containers, e.g. syringes, analysis phials.

Key Words: AISI 420 modified
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Physical PropertiesOriginal ValueComments
Density 0.282 lb/in³hardened to 50 HRC
 0.277 lb/in³
@Temperature 399 °C
hardened to 50 HRC
 0.280 lb/in³
@Temperature 199 °C
hardened to 50 HRC
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 200Soft annealed (Delivery condition)
Hardness, Rockwell C 30 - 55tempering temp 200 - 1200°F
Tensile Strength, Ultimate 206000 psihardened to 45 HRC
 256000 psihardened to 50 HRC
Tensile Strength, Yield 185000 psi
@Strain 0.2 %
hardened to 45 HRC
 213000 psi
@Strain 0.2 %
hardened to 50 HRC
Modulus of Elasticity 29000 ksi(hardened to 50 HRC)
 26100 ksi
@Temperature 399 °C
hardened to 50 HRC
 27600 ksi
@Temperature 199 °C
hardened to 50 HRC
 
Thermal PropertiesOriginal ValueComments
CTE, linear 6.10 µin/in-°F
@Temperature 199 °C
hardened to 50 HRC
 6.30 µin/in-°F
@Temperature 399 °C
hardened to 50 HRC
Specific Heat Capacity 0.110 BTU/lb-°F
@Temperature 20.0 °C
hardened to 50 HRC
Thermal Conductivity 16.0 W/m-K
@Temperature 20.0 °C
hardened to 50 HRC
 20.0 W/m-K
@Temperature 199 °C
hardened to 50 HRC
 24.0 W/m-K
@Temperature 399 °C
hardened to 50 HRC
 
Component Elements PropertiesOriginal ValueComments
Carbon, C 0.38 %
Chromium, Cr 13.6 %
Iron, Fe 84.3 %as balance
Manganese, Mn 0.50 %
Silicon, Si 0.90 %
Vanadium, V 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 go back to viewing the property data in MatWeb's normal format.

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NBUCOR29 / 15498

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