DESCRIPTION
CW717R is a brass with high ductility, high electrical and thermal conductivity, high impact
strength, good creep resistance, ease of welding, and low volatility under high vacuum.
CHEMICAL COMPOSITION
| Elements |
Min (%) |
Max (%) |
| Cu |
59.00 |
62.00 |
| Pb |
- |
0.20 |
| Sn |
0.5 |
1.00 |
| Fe |
- |
0.10 |
| Ni |
- |
0.20 |
| As |
0.02 |
0.06 |
| Total Others |
- |
0.20 |
| Zn |
Remainder |
Mechanical Properties According To EN 1653 (As Per Temper R320)
| Range (Inch)
|
From |
To |
UTS Min |
PS Min |
Elongation Min (%) |
Hardness Min (HRB) |
Hardness Max (HRB) |
| Round (Dia) |
1.5 |
75 |
320 |
100 |
30 |
- |
- |
| Hex (A/F) |
3 |
70 |
320 |
100 |
30 |
- |
- |
| Square (A/F) |
3 |
60 |
320 |
100 |
30 |
- |
- |
| Rectangle (Thickness) |
3 |
50 |
320 |
100 |
30 |
- |
- |
| PHYSICAL
PROPERTIES |
| Melting Point - Liquidus°F |
1650 |
| Melting Point - Solidus°F |
1630 |
| Densitylb/cu in. at 68°F |
0.304 |
| Specific Gravity |
8.41 |
| Electrical Conductivity% IACS at 68°F |
26 |
| Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F |
67 |
| Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) |
11.8 |
| Specific Heat CapacityBtu/ lb /°F at 68°F |
0.09 |
| Modulus of Elasticity in Tensionksi |
15000 |
| Modulus of Rigidityksi |
5600 |
| FABRICATION
PROPERTIES |
| Technique |
Suitability |
| Soldering |
Excellent |
| Brazing |
Excellent |
| Oxyacetylene Welding |
Good |
| Gas Shielded Arc Welding |
Fair |
| Coated Metal Arc Welding |
Not Recommended |
| Spot Weld |
Good |
| Seam Weld |
Fair |
| Butt Weld |
Good |
| Capacity for Being Cold Worked |
Fair |
| Capacity for Being Hot Formed |
Excellent |
| Forgeability Rating |
90 |
| Machinability Rating |
30 |
TYPICAL USES
- Fasteners
- Industrial
- Marine
