CW717R
CW717R Spec SheetCW717R 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 | 0.50 | 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 (mm) | UTS Min (MPa) |
UTS Max (MPa) |
PS Min (MPa) |
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 |
| Density lb/cu in. at 68°F | 0.304 |
| Specific Gravity | 8.41 |
| Electrical Conductivity% IACS at 68°F | 26 |
| Thermal Conductivity Btu/sq ft/ft hr/°F at 68°F | 67 |
| Coefficient of Thermal Expansion 68–572 × 10⁻⁶ per °F (68–572°F) | 11.8 |
| Specific Heat Capacity Btu/lb/°F at 68°F | – |
| Modulus of Elasticity in Tension ksi | 15000 |
| Modulus of Rigidity ksi | 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
Architecture
Fasteners
Industrial
Marine
