CT1 Bronze Alloy Casting
CT1 Bronze Alloy Casting is a coinage and fine-grain bronze specified under BS 1400 CT1, containing nominally 95% copper and 5% tin. CT1 is used for architectural, decorative, and fine-detail casting applications where surface finish and definition are important. Indicative price: US$ 9.00/kilogram.
CT1 Chemical Composition (BS 1400)
| Element |
Min % |
Max % |
| Copper (Cu) |
93.5 |
96.5 |
| Tin (Sn) |
4.0 |
6.0 |
| Lead (Pb) |
— |
0.10 |
| Zinc (Zn) |
— |
0.10 |
| Phosphorus (P) |
— |
0.05 |
CT1 Mechanical Properties (Sand Cast – BS 1400)
| Property |
Value |
| Tensile Strength |
220 MPa min |
| Yield Strength |
100 MPa min |
| Elongation |
20% min |
| Brinell Hardness |
55 HB typical |
| Density |
8.90 g/cm³ |
International Equivalents of CT1 Bronze
| Standard |
Designation |
Common Name |
| UK – BS 1400 |
CT1 |
Coinage / Fine Bronze |
| USA – UNS |
C94700 |
Nickel-Tin Bronze |
| Europe – EN 1982 |
CC498K |
CuSn5 |
| ISO 1338 |
CuSn5 |
Low Tin Bronze |
Typical Applications
CT1 bronze alloy castings are used for: architectural and decorative castings, medallions and plaques, fine-detail art casting, electrical connector bodies, bearing cages and retainers, and general light engineering components.
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