Crucible Steel KAPSTAR® Mold Steel

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Crucible Steel KAPSTAR® Mold Steel
Categories:	Metal; Ferrous Metal; Tool Steel
Material Notes:	Kapstar is a high hard, precipitation hardening mold steel suitable for production of machined or EDM’d plastic mold, rubber mold, and zinc die casting die components. Kapstar is supplied at about 40 HRC and further heat treating is generally not required. It is a through-hardened steel that exhibits uniform hardness through thick and thin sections. It is easily machined, polished, textured, and welded. Information provided by Crucible Industries
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Physical Properties	Original Value	Comments

Density	0.282 lb/in³

Mechanical Properties	Original Value	Comments
Hardness, Rockwell C	32 - 42
Modulus of Elasticity	29900 ksi

Thermal Properties	Original Value	Comments
CTE, linear	5.10 µin/in-°F @Temperature 21.1 - 100 °C
	6.20 µin/in-°F @Temperature 21.1 - 200 °C
	7.00 µin/in-°F @Temperature 21.1 - 300 °C
	7.50 µin/in-°F @Temperature 21.1 - 400 °C
Thermal Conductivity	182 BTU-in/hr-ft²-°F @Temperature 21.1 °C
	194 BTU-in/hr-ft²-°F @Temperature 100 °C
	203 BTU-in/hr-ft²-°F @Temperature 200 °C
	217 BTU-in/hr-ft²-°F @Temperature 300 °C

Component Elements Properties	Original Value	Comments
Aluminum, Al	1.0 %
Carbon, C	0.12 %
Chromium, Cr	0.50 %
Copper, Cu	0.20 %
Iron, Fe	91.8 %	as balance
Manganese, Mn	1.5 %
Molybdenum, Mo	0.25 %
Nickel, Ni	4.0 %
Silicon, Si	0.40 %
Sulfur, S	0.10 %
Vanadium, V	0.10 %

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NCRUC942 / 160393

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