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CW719R
CW719R
CW719R (standardized across European standards under EN 12164, EN 12165, and EN 12167 with the metallurgical designation CuZn40Sn1) is an unleaded, corrosion-resistant Naval Brass. Formulated as a duplex (Α + Β) copper-zinc matrix modified with approximately 0.50% to 1.00% tin (Sn) and a strictly restricted lead level (≤ 0.20%), CW719R is engineered specifically for components operating in seawater, marine atmospheres, and aggressive industrial fluid systems.
Chemical Composition
Elements |
Min (%) |
Max (%) |
Cu |
59.00 |
61.00 |
Pb |
- |
0.20 |
Sn |
0.50 |
1.00 |
Fe |
- |
0.10 |
Ni |
- |
0.20 |
Total Others |
- |
0.50 |
Zn |
Remainder |
|
Mechanical Properties According To EN 12165 (As Per Temper H080)
Range (mm) |
From |
To |
UTS Min |
PS Min |
Elongation Min (%) |
Hardness Min (HRB) |
Hardness Max (HRB) |
| Round (Dia) | 8 |
75 |
- |
- |
- |
80 |
150 |
| Hex (A/F) | 8 |
70 |
- |
- |
- |
80 |
150 |
| Square (A/F) | 8 |
60 |
- |
- |
- |
80 |
150 |
| Rectangle (Thickness) | 8 |
50 |
- |
- |
- |
80 |
150 |
PHYSICAL PROPERTIES |
|
| Melting Points - Liquidus 0F | 1650 |
| Melting Points - Solidus 0F | 1630 |
| Density lb/cu in. at 68 0F | 0.304 |
| Specific Gravity | 8.41 |
| Electrical Conductivity % IACS at 68 0F | 26 |
| Thermal conductivity Btu/ Sq ft / ft hr / 0F at 680F | 67 |
| Coefficient of Thermal Expansion 68-57210 -6 Per 0F (68-5720F) | 11.8 |
| Specific Heat capacity Btu/ lb /0F at 680F | 0.09 |
| 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 Are Welding | Fair |
| Coated Metal Are 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 |
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