Home > Omega Bytes > Material Highlight: ASTM-B740 Alloy C72650

This material is a copper base alloy with both high strength and high conductivity attributes. It provides excellent performance for shielding strips, contacts and connectors.

Chemical Composition (Weight Percent)

• Nickel - 7.5%
• Tin - 5%
• Copper - 87.5%

Physical Properties

• Electrical Conductivity @ 68°F (20°C) - 14-15% IACS
• Modulus of Elasticity - 18 x 10 psi (12 x 10³ Mpa)
• Density - 0.32 lb./in³ (8.87 gm./cc)

Benefits

• Combines high strength and formability
• High conductivity
• Available in mill hardened or age hardenable
• No distortion during aging, no fixturing
• Excellent solderability and resistance to stress relaxation during high temperature (over 400°F, 200°C) soldering
• Fine grain size
• Excellent corrosion resistance bare and easy to plate when required
• Low initial cost and additional savings during processing

TEMPER DESIGNATION	0.05% YS ksi (MPa)	UTS Ksi (MPa)	Elongation (%)	Hardness (VHN)
TD01	45-60 (310-413)	60-75 (413-517)	18	150-200
TD02	55-75 (379-516)	75-85 (517-586)	5	175-225
TS01	90-115 (620-792)	130-140 (896-965)	8	290-340
TS02	100-125 (689-861)	135-145 (930-999)	6	300-360
TM04	95-115 (655-792)	115-135 (792-930)	10	300-350
TM06	100-120 (689-827)	120-140 (827-965)	10	300-360

Find a Product

-- Unit of Measure -- Inches Millimeters -- Gap Size -- -- Mount Size -- -- Mount Method --

Resources

• Conductive Adhesive Transfer Tape
• Pressure Sensitive Adhesive Transfer Tape
• Copper Beryllium
• Copper Nickel Tin
• Kimmel Gerke Associates, Ltd.
• IEEE
• RoHS

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