Naval Brass Alloy C46400 (Lead Free)
Copper Alloy No. C46400
Naval Brass , CDA 464
ASTM B21 , ASTM B171
Chemical Composition % by weight
Naval Brass , CDA 464
ASTM B21 , ASTM B171
Chemical Composition % by weight
| Element | Nominal | Minimum | Maximum |
| Copper | 60 | 59 | 62 |
| Lead | - | - | .20 |
| Iron | - | - | .10 |
| Tin | .8 | .5 | 1 |
| Zinc | 39.2 | Remainder | |
| Arsenic** | - | .02 | .06 |
| Sb or P** | - | .02 | .10 |
* The uninhibited alloy is is copper alloy no. C46400.
** Arsenic, Antimony and Phosphorus inhibited alloys are identified respectively by copper alloy nos. C46500, C46600 and C46700.
Applications
Hardware: Aircraft turnbuckle barrels, balls, bolts.
Industrial: Condenser plates, welding rod.
Common Fabrication Processes
Blanking, drawing, forming and bending, heading and upsetting, hot forging and pressing, hot heading and upsetting, shearing.
Mechanical Properties
Typical for 1" Rod Half Hard (20%) Temper
| Hardness* | Rockwell B Scales | 82 |
| Tensile Strength** | KSI | 75 |
| Yield Strength** (.5% EAU) | KSI | 53 |
| Elongation** | % in 2 inch | 20 |
**Test values are nominal approximations and depend on specimen size and orientation.
Physical Properties
| Thermal Conductivity | BTU/ (sq ft-ft-hr-F) | 67 |
| Specific Heat | BTU/lb/ºF @ 68F | .09 |
| Thermal Expansion | Per °F from 68 F to 572 F | .0000118 |
| Density | lb/cu in @ 68 F | .304 |
| Electrical Conductivity* (Annealed) | % IACS @ 68 F | 26 |
| Modulus of Elasticity (Tension) | KSI | 15,000 |
*Volume basis
Fabrication Properties
| Capacity for being cold worked | Fair |
| Capacity for being hot formed | Excellent |
| Machinability rating (Free Cutting Brass=100) | 30 |
| 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/Fair | |
| Butt/Good |