Copper Alloy No. C86400
Leaded Manganese Bronze , Leaded High Strength Yellow Brass
UNS CDA 864
Chemical Composition % by weight
Element Nominal Minimum Maximum Copper 59 56 62 Tin 1 .5 1.5 Lead 1 .5 1.5 Zinc 38 34 42 Iron 1.2 .40 2 Nickel (incl Co) - - 1 Aluminum 1 .5 1.5 Manganese .80 .10 1.5
Free machine components, lever arms, light duty gears, marine fittings, valve stems.
M02 - As Centrifugal Cast
Hardness* Brinell Hardness (3000 kg load) 105 Tensile Strength** KSI 60 min Yield Strength ** KSI (0.5% Ext. under load) 20 min Elongation** % in 2 inch 15 min
**Test values are nominal approximations and depend on specimen size and orientation.
Thermal Conductivity BTU/ (sq ft-ft-hr-F) 51 Specific Heat BTU/lb/ºF @ 68F .09 Thermal Expansion Per °F from 68 F to 400 F .000011 Density lb/cu in @ 68 F .301 Electrical Conductivity % IACS @ 68 F 19 Modulus of Elasticity KSI 14,000
Stress relieving temperature 500 F or 260 C Time at temperature 1 hour per inch of section thickness Responds to heat treatment No Machinability rating (Free Cutting Brass=100) 65 Suitability for being joined by: Soldering/Fair Brazing/Fair* Oxyacetylene Welding/Poor Gas Shielded Arc Welding/Poor Coated Metal Arc Welding/Poor
*Since brazing is performed at temperatures within the hot-short range, strain must be avoided during the brazing and cooling of this alloy.