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Master Bond adhesives

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EDRO #8 Premium 420 Stainless Mold Steel
Categories: Metal; Ferrous Metal; Stainless Steel; T 400 Series Stainless Steel

Material Notes: EDRO #8™ is a chromium-alloyed stainless tool steel with the following properties: excellent corrosion resistance, superior polishability, good wear resistance, good machinability, and stability in hardening.
EDRO #8™ is recommended for all types of molding tools, its special properties make it particularly suitable for molds with the following demands: corrosion/staining resistance, i.e., for molding of corrosive materials, e.g. PVC, acetates, and for molds subjected to humid working/storage conditions; Wear resistance, i.e., for molding abrasive/filled materials, including injection-molded thermosetting grades - also for molds with exceptionally long production runs, e.g. electrical/electronic parts; disposable cutlery and containers; High surface finish, i.e., for production of optical parts, such as camera and sunglass lenses, and for medical containers, e.g. syringes, analysis phials.
EDRO #8™ is resistant to corrosive attack by water, water vapor, weak organic acids, dilute solutions of nitrates, carbonates and other salts.

Information provided by EDRO

Key Words: AISI 420 improved, W.-Nr 1.2083
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 PropertiesOriginal ValueComments
Density 0.277 lb/in³
@Temperature 399 °C
Hardened and tempered to 50 HRC
 0.280 lb/in³
@Temperature 199 °C
Hardened and tempered to 50 HRC
 0.282 lb/in³
@Temperature 20.0 °C
Hardened and tempered to 50 HRC
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 215Delivery condition (soft annealed)
Hardness, Rockwell C 38
@Treatment Temp. 566 °C
Tempered twice for 2 hr at temperature
 50
@Treatment Temp. 482 °C
Tempered twice for 2 hr at temperature
 52
@Treatment Temp. 177 °C
Tempered twice for 2 hr at temperature
 53
@Treatment Temp. 260 °C
Tempered twice for 2 hr at temperature
 55
@Treatment Temp. 399 °C
Tempered twice for 2 hr at temperature
 55
@Treatment Temp. 93.3 °C
Tempered twice for 2 hr at temperature
Tensile Strength, Ultimate 206000 psi45 HRC, Round bar 1" diameter, Hardened in oil from 1880°F and tempered twice
 256000 psi50 HRC, Round bar 1" diameter, Hardened in oil from 1880°F and tempered twice
 300000 psi55 HRC, Round bar 1" diameter, Hardened in oil from 1880°F and tempered twice
Tensile Strength, Yield 185000 psi45 HRC, Round bar 1" diameter, Hardened in oil from 1880°F and tempered twice
 213000 psi50 HRC, Round bar 1" diameter, Hardened in oil from 1880°F and tempered twice
 234000 psi55 HRC, Round bar 1" diameter, Hardened in oil from 1880°F and tempered twice
Elongation at Yield 8.0 %in 2", 55 HRC, Round bar 1" diameter, Hardened in oil from 1880°F and tempered twice
 10 %in 2", 50 HRC, Round bar 1" diameter, Hardened in oil from 1880°F and tempered twice
 12 %in 2", 45 HRC, Round bar 1" diameter, Hardened in oil from 1880°F and tempered twice
Reduction of Area 27 %55 HRC, Round bar 1" diameter, Hardened in oil from 1880°F and tempered twice
 30 %50 HRC, Round bar 1" diameter, Hardened in oil from 1880°F and tempered twice
 40 %45 HRC, Round bar 1" diameter, Hardened in oil from 1880°F and tempered twice
Modulus of Elasticity 27500 ksi
@Temperature 399 °C
 30400 ksi
@Temperature 199 °C
 31100 ksi
@Temperature 20.0 °C
Izod Impact 12.0 ft-lb
@Treatment Temp. 510 °C
Tempered for 2 hr
 15.0 ft-lb
@Treatment Temp. 371 °C
Tempered for 2 hr
 15.0 ft-lb
@Treatment Temp. 149 °C
Tempered for 2 hr
 20.0 ft-lb
@Treatment Temp. 260 °C
Tempered for 2 hr
 24.0 ft-lb
@Treatment Temp. 649 °C
Tempered for 2 hr
 55.0 ft-lb
@Treatment Temp. 760 °C
Tempered for 2 hr
 
Thermal PropertiesOriginal ValueComments
CTE, linear 6.10 µin/in-°F
@Temperature 20.0 - 199 °C
 6.40 µin/in-°F
@Temperature 20.0 - 399 °C
Specific Heat Capacity 0.110 BTU/lb-°F
@Temperature 20.0 °C
Thermal Conductivity 159 BTU-in/hr-ft²-°F
@Temperature 20.0 °C
 166 BTU-in/hr-ft²-°F
@Temperature 199 °C
 173 BTU-in/hr-ft²-°F
@Temperature 399 °C
 
Component Elements PropertiesOriginal ValueComments
Carbon, C 0.38 %
Chromium, Cr 13.6 %
Iron, Fe 84.42 %As Balance
Manganese, Mn 0.50 %
Silicon, Si 0.80 %
Vanadium, V 0.30 %
 
Descriptive Properties
Color CodeBrown

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