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EDRO #7 Shock Resistant S7 Tool Steel

Category	Metal , Ferrous Metal , Chrome-moly Steel , Tool Steel , Shock-Resisting Steel
Manufacturer	EDRO
Trade Name
Port	Ningbo port,China
Trade Terms	FOB, CFR, CIF
Payment Terms	L/C, T/T, Western Union
Download PDF	EDRO #7 Shock Resistant S7 Tool Steel.pdf
Price	EMAIL US sales@lookpolymers.com

Material Notes:

EDRO #7™ is a chromium-molybdenum steel characterized by: high toughness, good wear resistance, high impact resistance, good through hardening properties, good machinability, and good dimensional stability during hardening. EDRO #7™ is suitable for plastic molding including injection, compression and transfer molds. EDRO #7™ has a favorable combination of toughness and wear resistance for heavy duty blanking and forming tools. It is ideally suited for shear blades and cropping tools, both hot and cold. Other applications include rivet punches, chisels, cold heading dies and forging tools.Information provided by EDRO

Physical Properties	Metric	English	Comments
Density	7.70 g/cc @Temperature 399 °C	0.278 lb/in³ @Temperature 750 °F	Hardened and tempered to 57 HRC
	7.75 g/cc @Temperature 199 °C	0.280 lb/in³ @Temperature 390 °F	Hardened and tempered to 57 HRC
	7.81 g/cc @Temperature 20.0 °C	0.282 lb/in³ @Temperature 68.0 °F	Hardened and tempered to 57 HRC

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	200	200	Delivery condition (soft annealed)
Hardness, Rockwell C	42 @Treatment Temp. 621 °C	42 @Treatment Temp. 1150 °F	Tempered twice for 2 hr at temperature
	50 @Treatment Temp. 538 °C	50 @Treatment Temp. 1000 °F	Tempered twice for 2 hr at temperature
	55 @Treatment Temp. 316 °C	55 @Treatment Temp. 600 °F	Tempered twice for 2 hr at temperature
	58 @Treatment Temp. 149 °C	58 @Treatment Temp. 300 °F	Tempered twice for 2 hr at temperature
Hardness, Vickers	850 @Treatment Temp. 570 °C	850 @Treatment Temp. 1060 °F	Tufftride process, 2 hr
	1000 @Treatment Temp. 525 °C	1000 @Treatment Temp. 977 °F	Nitriding in ammonia gas
Tensile Strength, Ultimate	1720 MPa	250000 psi	45 HRC
	2030 MPa	295000 psi	50 HRC
	2450 MPa	355000 psi	55 HRC
	2650 MPa	385000 psi	58 HRC
Tensile Strength, Yield	1380 MPa @Strain 0.200 %	200000 psi @Strain 0.200 %	45 HRC
	1650 MPa @Strain 0.200 %	240000 psi @Strain 0.200 %	50 HRC
	2030 MPa @Strain 0.200 %	295000 psi @Strain 0.200 %	55 HRC
	2070 MPa @Strain 0.200 %	300000 psi @Strain 0.200 %	58 HRC
Modulus of Elasticity	177 GPa @Temperature 399 °C	25700 ksi @Temperature 750 °F
	192 GPa @Temperature 199 °C	27800 ksi @Temperature 390 °F
	197 GPa @Temperature 20.0 °C	28600 ksi @Temperature 68.0 °F

Thermal Properties	Metric	English
CTE, linear	12.1 µm/m-°C @Temperature 20.0 - 199 °C	6.70 µin/in-°F @Temperature 68.0 - 390 °F
	12.4 µm/m-°C @Temperature 20.0 - 399 °C	6.90 µin/in-°F @Temperature 68.0 - 750 °F
Specific Heat Capacity	0.460 J/g-°C @Temperature 20.0 °C	0.110 BTU/lb-°F @Temperature 68.0 °F
Thermal Conductivity	29.1 W/m-K @Temperature 20.0 °C	202 BTU-in/hr-ft²-°F @Temperature 68.0 °F
	29.8 W/m-K @Temperature 199 °C	207 BTU-in/hr-ft²-°F @Temperature 390 °F
	31.0 W/m-K @Temperature 399 °C	215 BTU-in/hr-ft²-°F @Temperature 750 °F

Component Elements Properties	Metric	English	Comments
Carbon, C	0.50 %	0.50 %
Chromium, Cr	3.3 %	3.3 %
Iron, Fe	93.7 %	93.7 %	As Balance
Manganese, Mn	0.80 %	0.80 %
Molybdenum, Mo	1.4 %	1.4 %
Silicon, Si	0.30 %	0.30 %

Descriptive Properties	Value	Comments
Color Code	Black

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