| Alloy Name | |
|---|---|
| UNS | C28000 |
| IS/ISO | CuZn40 |
| DIN CEN/TS 13388 | CW617N |
| This alloy is as per RoHS specification | |
KEI offers a wide range of brass rolled products in the form of foils, strips, sheets, and circles to meet our customers’ needs for industrial manufacturing.
CuZn40 is an economical brass alloy with high Zinc content, good forming properties, and medium strength.
| Chemical Composition | Weight Percentage |
|---|---|
| Cu | 58.50–61.50% |
| Pb | 0.30 Max |
| Fe | 0.10% Max |
| Zn | Reminder % |
| Total Impurity | 0.75% Max |
Industrial: Locks, Metal Fittings, Keys.
Architecture: Decoration, Hardware, Door Frames, Large Architectural Trim, Large Sheet.
Physical Properties Typical values in annealed temper at 20°C
| Physical Properties (Annealed Temper at 20°C) | ||
|---|---|---|
| Density | 8.41 | g/cm³ |
| Thermal expansion coefficient -191 .. 16 | 20.3 | 10⁻⁶/K |
| Specific heat capacity - 0 .. 300°C | 21.0 | 10⁻⁶/K |
| Thermal conductivity | 0.375 | J/(g•K) |
| Electrical conductivity (1 MS/m = 1 m/(Ω mm²)) | 117 | W/(m•K) |
| Electrical conductivity (IACS) | 15 | MS/m % |
| Thermal coefficient of electrical resistance (0 .. 200°C) | 26 | 10⁻³/K |
| Modulus of elasticity (cold formed) | 102 | GPa |
| Mechanical Properties (EN 1652) | ||||
|---|---|---|---|---|
| Temper | Tensile Strength Rm MPa | Yield Strength Rp0.2 MPa | Elongation A50mm % | Hardness HV |
| O (SOFT) | 275 Min | — | 35 Min | 85 Max |
| HB (Half Hard) | 420 Min | — | 15 Min | 100 Min |
| HD (Hard) | 490 Min | — | 5 Min | 125 Min |
| HE (Extra Hard) | 525 Min | — | — | 165 Min |