EDRO EDRO400™ #40 Prehardened Insert Quality Martensitic Stainless Steel

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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 Properties	Original Value	Comments

Density	0.282 lb/in³ @Temperature 199 °C
	0.284 lb/in³ @Temperature 20.0 °C

Mechanical Properties	Original Value	Comments
Hardness, Rockwell C	38 - 42
Hardness, Vickers	420 @Treatment Temp. 470 °C, Thickness 0.0400 mm	Gas Nitriding, thickness refers to distance from surface
	420 @Treatment Temp. 470 °C, Thickness 0.100 mm	Gas Nitriding, thickness refers to distance from surface
	430 @Treatment Temp. 400 °C, Thickness 0.100 mm	Plasma Nitriding, thickness refers to distance from surface
	450 @Treatment Temp. 400 °C, Thickness 0.0400 mm	Plasma Nitriding, thickness refers to distance from surface
	500 @Treatment Temp. 400 °C, Thickness 0.0300 mm	Plasma Nitriding, thickness refers to distance from surface
	500 @Treatment Temp. 470 °C, Thickness 0.0200 mm	Gas Nitriding, thickness refers to distance from surface
	800 @Treatment Temp. 470 °C, Thickness 0.0180 mm	Gas Nitriding, thickness refers to distance from surface
	1000 @Treatment Temp. 400 °C, Thickness 0.0200 mm	Plasma Nitriding, thickness refers to distance from surface
	1050 @Treatment Temp. 470 °C, Thickness 0.00700 mm	Gas Nitriding, thickness refers to distance from surface
	1100 @Treatment Temp. 470 °C, Thickness 0.0100 mm	Gas Nitriding, thickness refers to distance from surface
	1100 @Treatment Temp. 400 °C, Thickness 0.0100 mm	Plasma Nitriding, thickness refers to distance from surface
Tensile Strength, Ultimate	189000 psi @Temperature 20.0 °C	Longitudinal Tests from 6.3" rolled plate at 375 HB
Tensile Strength, Yield	146000 psi @Strain 0.2 %, Temperature 20.0 °C	Longitudinal Tests from 6.3" rolled plate at 375 HB
Elongation at Yield	13 % @Temperature 20.0 °C	in 2"
Reduction of Area	33 % @Temperature 20.0 °C
Modulus of Elasticity	27600 ksi @Temperature 199 °C
	29000 ksi @Temperature 20.0 °C
Charpy Impact	9.00 ft-lb @Temperature 20.0 °C	Average CharpyV-notch from 6.3" plate at 387 HB

Thermal Properties	Original Value	Comments
CTE, linear	6.10 µin/in-°F @Temperature 20.0 - 199 °C
Thermal Conductivity	196 BTU-in/hr-ft²-°F @Temperature 199 °C

Descriptive Properties
Color Code	Red White Stripe

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NSEDRO002 / 142939

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