Copper

At a Glance

Process

Lead Time

Finish Options

Tolerance

Price

Applications

3 days (rush)
5-7 days (standard)
Available as-machined, media blasted, or hand-polished
ISO 2768
$$$
Bus bars, gaskets, wire connectors, and other electrical applications

About the Material

101 and 110 copper alloys offer excellent thermal and electrical conductivity, which make them natural choices for bus bars, wire connectors, and other electrical applications. While 101 (also known as super-conductive copper) offers higher conductivity due to its purity (99.99% copper), 110 is generally easier to machine and thus more cost-effective.

Material Properties

110 Copper

Tensile Strength

Elongation at Break

Hardness

Density

Maximum
Temp

McMaster Part Number

42,000 psi (1/2 hard)
20%
Rockwell F40
0.322 lbs / cu. in.
500° F

101 Copper

Tensile Strength

Elongation at Break

Hardness

Density

Maximum
Temp

McMaster Part Number

37,000 psi (1/2 hard)
14%
Rockwell F60
0.323 lbs / cu. in.
500° F

Material Finish

Design Recommendations

Min Wall Thickness

Min End Mill Size

Min Drill Size

Max Part Size

Undercuts

Radii : Depth

0.5 mm
0.8 mm
(0.03 in)
0.5 mm
(0.02 in)
1200 x 500 x 152 mm [x,y,z] (mill) 

152 x 394 mm 
[d,h] (lathe)
Square profile, full radius, dovetail profiles
Depth must not exceed 12x drill bit diameter.
For end mills, depth must not exceed 10x tool diameter.

Cost Saving Tip

To reduce costs, limit the number of part setups, the number of inspection dimensions or tight tolerances, and deep pockets with small radii.

Related Resources

Engineer's Guide to CNC Machining for Prototyping Hardware
Fictiv CNC Material Datasheet