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CZ133
CZ133
CZ133 (governed by the British Standard BS 2874 and aligned with European EN 12164 CW719R and ASTM B21 UNS C46400) is an unleaded, corrosion-resistant Naval Brass. Formulated as a nominal 60/40 copper-zinc matrix enhanced with 0.50% to 1.00% Tin (Sn) and restricted to a maximum of 0.20% lead, CZ133 provides a refined balance of seawater corrosion resistance, mechanical strength, and cold/hot formability.
Chemical Composition
Elements | Min (%) | Max (%) |
Cu | 59.00 | 62.00 |
Pb | – | 0.20 |
Sn | 0.50 | 1.00 |
Fe | – | 0.10 |
Total Others | – | 0.40 |
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 | 170 | 20 | – | – |
18 | 40 | 350 | 150 | 25 | – | – |
|
| Hex (A/F) | 6 | 18 | 400 | 170 | 20 | – | – |
18 | 40 | 350 | 150 | 25 | – | – |
|
| Square (A/F) | 6 | 18 | 400 | 170 | 20 | – | – |
18 | 40 | 350 | 150 | 25 | – | – |
|
| Rectangle (Thickness) | 6 | 18 | 400 | 170 | 20 | – | – |
18 | 40 | 350 | 150 | 25 | – | – |
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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