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Assab Steels 718HH Plastic Mold Material

Category	Metal , Ferrous Metal , Alloy Steel , Chrome-moly Steel
Manufacturer	Assab Steels
Trade Name
Port	Shanghai port,China
Trade Terms	FOB, CFR, CIF
Payment Terms	L/C, T/T, Western Union
Download PDF	Assab Steels 718HH Plastic Mold Material.pdf
Price	EMAIL US sales@lookpolymers.com

Material Notes:

IMPAX SUPREME is a premium-quality vacuum-degassed Cr-Ni-Mo-alloyed steel which is supplied in the hardened and tempered condition. IMPAX SUPREME is manufactured to consistently high quality standards with a very low sulfur content, giving a steel with the following characteristics: Good polishing and photo etching propertiesGood machinabilityHigh purity and good homogeneityUniform hardnessApplications: Injection moulds for thermoplasticsExtrusion dies for thermoplasticsBlow mouldsForming tools, press-brake dies (possibly flame hardened or nitrided)Structural components, shafts.AISI P20 modified, W.-Nr. 1.2738

Physical Properties	Metric	English	Comments
Density	7.81 g/cc	0.282 lb/in³
	7.75 g/cc @Temperature 200 °C	0.280 lb/in³ @Temperature 392 °F

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	325	325	tempering at 600°C
	340 - 380	340 - 380	hardness supplied.
	450	450	tempering at 400°C
	500	500	tempering at 200°C
Tensile Strength, Ultimate	979 MPa @Thickness 25.4 mm, Temperature 200 °C	142000 psi @Thickness 1.00 in, Temperature 392 °F	R<sub>m</sub>. Bar. 310 HB
	1080 MPa @Diameter 25.4 mm	156000 psi @Diameter 1.00 in	R<sub>m</sub>. Bar. 310 HB
Tensile Strength, Yield	827 MPa @Diameter 25.4 mm	120000 psi @Diameter 1.00 in	R<sub>p</sub>0.2. bar. Hardness: 310 HB
	986 MPa @Diameter 25.4 mm	143000 psi @Diameter 1.00 in	R<sub>p</sub>0.2. bar. 310 HB
Modulus of Elasticity	205 GPa	29700 ksi
	200 GPa @Temperature 200 °C	29000 ksi @Temperature 392 °F
Impact Test	30.0 J @Diameter 25.4 mm, Temperature 20.0 °C	22.1 ft-lb @Diameter 1.00 in, Temperature 68.0 °F	310 HB
	130 J @Diameter 25.4 mm, Temperature 200 °C	95.9 ft-lb @Diameter 1.00 in, Temperature 392 °F	310 HB

Thermal Properties	Metric	English
CTE, linear	12.7 µm/m-°C @Temperature 20.0 - 200 °C	7.06 µin/in-°F @Temperature 68.0 - 392 °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
	29.5 W/m-K @Temperature 200 °C	205 BTU-in/hr-ft²-°F @Temperature 392 °F

Component Elements Properties	Metric	English
Carbon, C	0.37 %	0.37 %
Chromium, Cr	2.0 %	2.0 %
Iron, Fe	94.722 %	94.722 %
Manganese, Mn	1.4 %	1.4 %
Molybdenum, Mo	0.20 %	0.20 %
Nickel, Ni	1.0 %	1.0 %
Silicon, Si	0.30 %	0.30 %
Sulfur, S	0.0080 %	0.0080 %

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