Brass Copper Castings India
Copper Alloy No. C84400


Copper Alloy No. C84400
Leaded Semi-Red Brass , CDA 844
Chemical Composition % by weight
Element Nominal Minimum Maximum
Aluminum - - .005
Antimony - - .25
Copper 81 78 82
Iron - - .40
Lead 7 6 8
Nickel - - 1
Phosphorus - - .02
Silicon - - .005
Sulfur - - .08
Tin 3 2.3 3.5
Zinc 9 7 10

Applications

General hardware, ornamental castings, plumbing supplies and fixtures, low pressure valves and fittings.

Mechanical Properties

M07 - As Continuous Cast

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Hardness* Brinell Hardness (500 kg load) 55
Tensile Strength** KSI 30 min
Yield Strength ** KSI (0.5% Ext. under load) 15 min
Elongation** % in 2 inch 16 min

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

Physical Properties

Thermal Conductivity BTU/ (sq ft-ft-hr-F) 41.9
Specific Heat BTU/lb/ºF @ 68F .09
Thermal Expansion Per °F from 68 F to 500 F .000010
Density lb/cu in @ 68 F .314
Electrical Conductivity % IACS @ 68 F 16.4
Modulus of Elasticity KSI 13,000

Fabrication Practices

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) 90
Suitability for being joined by: Soldering/Excellent
Brazing/Good*
Oxyacetylene Welding/Not Recommended
Gas Shielded Arc Welding/Not Recommended
Coated Metal Arc Welding/Fair