Leaded Naval Brass Alloy C48500
Copper Alloy No. C48500
Naval Brass , ASTM B21 CDA 485
Chemical Composition % by weight
Naval Brass , ASTM B21 CDA 485
Chemical Composition % by weight
Element | Nominal | Minimum | Maximum |
Copper | 60 | 59 | 62 |
Lead | 1.8 | 1.3 | 2.2 |
Iron | - | - | .10 |
Tin | .70 | .50 | 1 |
Zinc | 37.5 | Remainder |
Applications
Marine hardware, screw machine products, valve stems.
Common Fabrication Processes
Hot forging, pressing and machining.
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 | 15 |
**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 | .305 |
Electrical Conductivity* (Annealed) | % IACS @ 68 F | 26 |
Modulus of Elasticity (Tension) | KSI | 15,000 |
*Volume basis
Fabrication Properties
Capacity for being cold worked | Poor |
Capacity for being hot formed | Good |
Machinability rating (Free Cutting Brass=100) | 70 |
Suitability for being joined by: | Soldering/Excellent |
Brazing/Good | |
Oxyacetylene Welding/Not Recommended | |
Gas Shielded Arc Welding/Not Recommended | |
Coated Metal Arc Welding/Not Recommended | |
Resistance Welding | Spot/Not Recommended |
Seam/Not Recommended | |
Butt/Fair |