C42500 is a copper-based alloy that consists of approximately 3%
tin (Sn) and 9% zinc (Zn) as the primary alloying elements. This
alloy falls under the category of tin-zinc bronzes. While it is not
a commonly known or standardized designation according to the
Unified Numbering System (UNS), it is possible that C42500 is a proprietary or custom alloy designation used by a specific
manufacturer or industry.
Tin-zinc bronzes generally exhibit good mechanical properties,
including high strength, good wear resistance, and excellent
corrosion resistance. These alloys are often used in applications
where a combination of strength, hardness, and corrosion resistance
is required.
If C42500 is a specific alloy you are interested in, I would recommend
reaching out to the manufacturer or supplier to obtain detailed
information about its composition, properties, and suitable
applications. They will be able to provide you with specific
technical specifications and guidance based on their expertise and
knowledge of the alloy.
CHEMICAL COMPOSITION
| | Sn% | Cu% | Zn% |
| Nominal Composition | | | Bal. |
| Min | 1.5 | 87 | |
| Max | 3.0 | 90 | |
PHYSICAL PROPERTIES
| Density g/cm3 | 8.75 |
| Conductivity at 20°C %IACS | 28 |
| Elastic Modulus GPa | 120 |
| Poisson's ratio | 0.34 |
| Thermal expansion coefficient 10-6/ K | 18.4 |
MECHANICAL PROPERTIES
| State | Yield strength | Tensile strength | Elongation | Hardness |
| | Mpa | MPa | A50% | HV |
| R395 | 355-465 | 395-485 | ≥18 | 110-150 |
| R430 | 400-490 | 430-510 | ≥12 | 130-170 |
| R485 | 455-545 | 485-565 | ≥9 | 160-180 |
| R525 | 495-585 | 525-605 | ≥7 | 170-190 |
| R580 | 550-630 | 580-650 | ≥3 | 180-200 |
| R635 | ≥600 | ≥635 | - | ≥200 |
Bending performance
Bending thickness: ≤0.5 mm, bending width: 10 mm
| State | 90° R/T | 180° R/T |
| | GW | BW | GW | BW |
| R395 | 0 | 0 | 0 | 0 |
| R430 | 0 | 0 | 0 | 0 |
| R485 | 0 | 0.5 | 0.5 | 1 |
| R525 | 0.5 | 1 | 1 | 1.5 |
| R580 | 1.5 | 2.5 | 1 | 3 |
| R635 | - | - | - | |
Alloy System | designation | UNS | EN | JIS | GB (China) |
| Cu | TK11000 | C11000 | Cu-ETP | C1100 | T2 |
CuCr/Zr | TK15100 | C15100 | CuZr0.1 | C1510 | TZr0.1 |
| TK18160 | C18160 | CuCr0.5Zr | — | |
| TK18150 | C18150 | CuCr1Zr | — | TCr1-0.15 |
| CuCrSiTi | TK18070 | C18070 | CuCrSiTi | — | TCr0.3-0.2- 0.05 |
| CuNiSnCrTi | TK18090 | — | — | — | |
| CuNiP | TK19000 | C19000 | CuNi1P | — | |
| CuTi | TK19920 | C19920 | — | — | — |
CuFe | TK19210 | C19210 | CuFe0.1P | C1921 | TFe0.1 |
| TK19400 | C19400 | CuFe2P | C1940 | TFe2.5 |
CuNiSi | TK19005 | C19005 | — | — | — |
| TK19010 | C19010 | CuNiSi | — | — |
| TK70260 | C70260 | CuNi2Si | C7026 | BSi2-0.45 |
| TK70250 | C70250 | CuNi3SiMg | C7025 | BSi3.2-0.7 |
| TK70250HS | C70250 | CuNi4SiMg | C7025 | — |
| CuNiCoSi | TK70318 | C70318 | CuNi3CoSi | — | — |
Special Brass | TK42300 | C42300 | CuZn10Sn1NiSi | — | — |
| TK42500 | C42500 | CuSn3Zn9 | — | HSn88-2 |
CuSn / Bronze | TK14415 | C14415 | CuSn0.15 | — | TSn0.12 |
| TK51000 | C51000 | CuSn5 | C5102 | QSn5-0.2 |
| TK51100* | C51100 | CuSn4 | C5111 | QSn4-0.3 |
| TK51900* | C51900 | CuSn6 | C5191 | QSn6-0.2 |
| TK52100* | C52100 | CuSn8 | C5210 | QSn8-0.3 |
