Copper Alloy No. C26000

Cartridge Brass, 70%

Chemical Composition % by weight

Copper Lead Iron Zinc
70 Nominal .07 Maximum .05 Maximum Remainder (nominal 30%)

Applications

Architectural: grillwork 

Automotive: radiator, heater cores and tanks

Electrical: flashlight shells, lamp fixtures, reflectors, screw shells, socket shells

Hardware: bead chain, chain, eyelets, fasteners, grommets, finish hardware articles (kick plates, locks, push plates etc.), stencils

Industrial: pump, power cylinders and liners

Munitions: ammunition components

Plumbing: plumbing accessories, plumbing brass goods

Wire: fasteners, pins, rivets, screws, springs 

Mechanical Properties

Typical  for 1" OD tube x .065" wall  thickness hard drawn temper (35%)

Hardness* Rockwell B Scales 82
Tensile Strength** KSI 78
Yield Strength** KSI 64
Elongation** % in 2 inch 8

**Test values are nominal approximations and depend on specimen size and orientation.

Physical Properties

Thermal Conductivity BTU/ (sq ft-ft-hr-F) 70
Specific Heat BTU/lb/ºF @ 68F .09
Thermal Expansion Per °F from 68 F to 572 F .0000111
Density lb/cu in @ 68 F .308
Electrical Conductivity* (Annealed) % IACS @ 68 F 28
Modulus of Elasticity KSI 16,000

*Volume basis

Fabrication Properties

Capacity for being cold worked Excellent
Capacity for being hot formed Fair
Hot working temperature 1350-1550 F or 725-850 C
Annealing temperature 800-1400 F or 425-750 C
Machinability rating (Free Cutting Brass=100) -
Suitability for being joined by: Soldering/Excellent
Brazing/Excellent
Oxyacetylene Welding/Good
Gas Shielded Arc Welding/Fair
Coated Metal Arc Welding/Not Recommended
Resistance Welding Spot/Good
Seam/Not Recommended
Butt/Good

The values listed above represent reasonable approximations suitable for general engineering use. Due to commercial variations in composition and to manufacturing limitations, they should not be used for specification purposes. See applicable A.S.T.M. specification references.