Copper Alloy No. C84400
Copper Alloy No. C84400
Leaded Semi-Red Brass , CDA 844
Chemical Composition % by weight
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
| 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 |