|
|
|
Copper Alloy No.
C48500
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 |
The values listed above represent reasonable
approximations suitable for general engineering use. Due to commercial
variations in composition and to manufacturing limitations, they should not
be used for specification purposes. See applicable A.S.T.M. specification
references.
|
