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CZ112
CZ112
CZ112 (governed by British Standard BS 2874 and harmonized in Europe as EN 12164 / CW708R) is the classic, high-performance Naval Brass alloy engineered primarily for marine engineering, offshore installations, and saline fluid-handling systems. Based on a 60/40 copper-zinc duplex (Α + Β) matrix, it is fortified with 1.0% to 1.5% Tin (Sn) to deliver resistance against dezincification and galvanic corrosion in seawater and aggressive brackish environments.
Chemical Composition
Elements | Min (%) | Max (%) |
Cu | 61.00 | 63.50 |
Pb | – | – |
Sn | 1.00 | 1.40 |
Fe | – | – |
Total Others | – | 0.70 |
Zn | Remainder | |
Mechanical Properties According To BS 2874 (As Per Temper M)
Range (mm) |
From |
To |
UTS Min (N/mm²) |
PS Min (N/mm²) |
Elongation Min (%) |
Hardness Min |
Hardness Max |
| Round (Dia) | 6 | 18 | 400 | – | 15 | – | – |
18 | 40 | 350 | – | 20 | – | – |
|
| Hex (A/F) | 6 | 18 | 400 | – | 15 | – | – |
18 | 40 | 350 | – | 20 | – | – |
|
| Square (A/F) | 6 | 18 | 400 | – | 15 | – | – |
18 | 40 | 350 | – | 20 | – | – |
|
| Rectangle (Thickness) | 6 | 18 | 400 | – | 15 | – | – |
18 | 40 | 350 | – | 20 | – | – |
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 |
| Capacity for being Cold Worked | Fair |
| Hot Worked | Excellent |
| Machinability Rating | 30% |
| Forgeability Rating | 90% |
| Silver Alloy Brazing | Excellent |
| Soft Soldering | Excellent |
| Oxyacetylene Welding | Good |
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