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Specialty Compounds RTP Company

EDRO EDRO400™ #40 Prehardened Insert Quality Martensitic Stainless Steel
Categories: Metal; Ferrous Metal; Martensitic; Stainless Steel; T 400 Series Stainless Steel
Material Notes: EDRO400™ is a remelted 400 series martensitic stainless steel supplied prehardened to 40 HRC (375 HB).
EDRO400™ is characterized by excellent polishability, superior corrosion resistance, high level of dimensional stability, enhanced machinability, good ductility and toughness, uniform and consistent hardness, good thermal conductivity, good resistance to indentation (compressive strength), smooth as rolled plate surfaces, and excellent weldability.
EDRO400™ chemical composition, melting and refining practice and thermal treatment establish physical and mechanical properties designed to provide homogeneity, superior polished surface finishes, improved corrosion resistance, reduced mold maintenance costs, dimensional stability, uniform and consistent hardness, and safe and simple weld repair.
Applications: plastic injection mold inserts / cavities, extrusion tooling, rubber molds, components, and constructional parts

Information provided by EDRO
Key Words: 420 ESR
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Physical PropertiesMetricEnglishComments
Density  7.81 g/cc
@Temperature 199 °C		0.282 lb/in³
@Temperature 390 °F
 7.86 g/cc
@Temperature 20.0 °C		0.284 lb/in³
@Temperature 68.0 °F
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell C 38 - 4238 - 42
Hardness, Vickers  420
@Treatment Temp. 470 °C,
Thickness 0.0400 mm		420
@Treatment Temp. 878 °F,
Thickness 0.00157 in		Gas Nitriding, thickness refers to distance from surface
 420
@Treatment Temp. 470 °C,
Thickness 0.100 mm		420
@Treatment Temp. 878 °F,
Thickness 0.00394 in		Gas Nitriding, thickness refers to distance from surface
 430
@Treatment Temp. 400 °C,
Thickness 0.100 mm		430
@Treatment Temp. 752 °F,
Thickness 0.00394 in		Plasma Nitriding, thickness refers to distance from surface
 450
@Treatment Temp. 400 °C,
Thickness 0.0400 mm		450
@Treatment Temp. 752 °F,
Thickness 0.00157 in		Plasma Nitriding, thickness refers to distance from surface
 500
@Treatment Temp. 400 °C,
Thickness 0.0300 mm		500
@Treatment Temp. 752 °F,
Thickness 0.00118 in		Plasma Nitriding, thickness refers to distance from surface
 500
@Treatment Temp. 470 °C,
Thickness 0.0200 mm		500
@Treatment Temp. 878 °F,
Thickness 0.000787 in		Gas Nitriding, thickness refers to distance from surface
 800
@Treatment Temp. 470 °C,
Thickness 0.0180 mm		800
@Treatment Temp. 878 °F,
Thickness 0.000709 in		Gas Nitriding, thickness refers to distance from surface
 1000
@Treatment Temp. 400 °C,
Thickness 0.0200 mm		1000
@Treatment Temp. 752 °F,
Thickness 0.000787 in		Plasma Nitriding, thickness refers to distance from surface
 1050
@Treatment Temp. 470 °C,
Thickness 0.00700 mm		1050
@Treatment Temp. 878 °F,
Thickness 0.000276 in		Gas Nitriding, thickness refers to distance from surface
 1100
@Treatment Temp. 470 °C,
Thickness 0.0100 mm		1100
@Treatment Temp. 878 °F,
Thickness 0.000394 in		Gas Nitriding, thickness refers to distance from surface
 1100
@Treatment Temp. 400 °C,
Thickness 0.0100 mm		1100
@Treatment Temp. 752 °F,
Thickness 0.000394 in		Plasma Nitriding, thickness refers to distance from surface
Tensile Strength, Ultimate 1300 MPa
@Temperature 20.0 °C		189000 psi
@Temperature 68.0 °F		Longitudinal Tests from 6.3" rolled plate at 375 HB
Tensile Strength, Yield 1010 MPa
@Strain 0.2 %,
Temperature 20.0 °C		146000 psi
@Strain 0.2 %,
Temperature 68.0 °F		Longitudinal Tests from 6.3" rolled plate at 375 HB
Elongation at Yield 13 %
@Temperature 20.0 °C		13 %
@Temperature 68.0 °F		in 2"
Reduction of Area 33 %
@Temperature 20.0 °C		33 %
@Temperature 68.0 °F
Modulus of Elasticity  190 GPa
@Temperature 199 °C		27600 ksi
@Temperature 390 °F
 200 GPa
@Temperature 20.0 °C		29000 ksi
@Temperature 68.0 °F
Charpy Impact 12.2 J
@Temperature 20.0 °C		9.00 ft-lb
@Temperature 68.0 °F		Average CharpyV-notch from 6.3" plate at 387 HB
 
Thermal PropertiesMetricEnglishComments
CTE, linear 11.0 µm/m-°C
@Temperature 20.0 - 199 °C		6.10 µin/in-°F
@Temperature 68.0 - 390 °F
Thermal Conductivity 28.2 W/m-K
@Temperature 199 °C		196 BTU-in/hr-ft²-°F
@Temperature 390 °F
 
Descriptive Properties
Color CodeRed White Stripe

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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