Ampco Metal AMPCOLOY® 940 Nickel-Copper, Extrusion, 25

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Ampco Metal AMPCOLOY® 940 Nickel-Copper, Extrusion, 25 - 50 mm.
Categories:	Metal; Nonferrous Metal; Copper Alloy
Material Notes:	AMPCOLOY 940 is a patented alloy which meets the demands of users of the RWMA class 3 alloys without Beryllium. In the industrialized countries, stricter health and safety instructions on the use of noxious elements have forced AMPCO to develop this new alloy. It replaces the AMPCOLOY 95 in practically all applications. Applications: AMPCOLOY 940 is used wherever a good electrical or thermal conductivity is required together with high mechanical properties: Electrode holders and seam welding shafts; Spot welding electrodes, seam welding discs, projection and butt welding dies, principally for stainless steel and Monel; Plunger tips for cold chamber aluminum die casting machines; Parts of moulds for injection moulding of plastics, injection-nozzles and cooling pins; Brake drums for paper winding rolls; Parts for energy engineering
Key Words:	RWMA Class 3
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Physical Properties	Metric	English	Comments

Density	8.71 g/cc	0.315 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	210	210	HB 30
Hardness, Rockwell B	95	95
Tensile Strength, Ultimate	669 MPa	97000 psi
Tensile Strength, Yield	517 MPa @Strain 0.5 %	75000 psi @Strain 0.5 %
Elongation at Break	13 %	13 %
Reduction of Area	20 %	20 %
Modulus of Elasticity	131 GPa	19000 ksi
Compressive Yield Strength	552 MPa	80100 psi	0.1% Perm. Set

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.00000357 ohm-cm	0.00000357 ohm-cm	48% I.A.C.S.

Thermal Properties	Metric	English	Comments
CTE, linear	17.5 µm/m-°C @Temperature 20.0 °C	9.72 µin/in-°F @Temperature 68.0 °F
Specific Heat Capacity	0.380 J/g-°C	0.0908 BTU/lb-°F
Thermal Conductivity	208 W/m-K	1440 BTU-in/hr-ft²-°F

Component Elements Properties	Metric	English	Comments
Chromium, Cr	<= 0.40 %	<= 0.40 %
Copper, Cu	96.4 - 96.8 %	96.4 - 96.8 %	As Balance
Nickel, Ni	2.5 %	2.5 %
Silicon, Si	0.70 %	0.70 %

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NAMPCO41 / 14995

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