DIN 2.1525

DIN 2.1525 is a copper alloy designation corresponding to a silicon bronze alloy, also identified as CW116C or CuSi3Mn1.

Chemical Composition (Typical for DIN 2.1525 / CW116C)

• Copper (Cu): Balance (~94.5-99.2%)

• Silicon (Si): 2.4 – 3.6%

• Manganese (Mn): 0.5 – 1.3%

• Iron (Fe): 0.6 – 1.2%

• Zinc (Zn), Lead (Pb), and other minor elements in trace amounts

Mechanical Properties

• Tensile Strength: Approx. 480 MPa

• Yield Strength: Around 260 – 280 MPa

• Elongation: 20 – 30%

• Hardness (Brinell): 100 - 130 HB

Physical Properties

• Density: Approximately 8.5 g/cm³

• Melting Range: Approx. 1025 – 1070 °C

• Electrical Conductivity: Around 7% IACS (International Annealed Copper Standard)

• Thermal Conductivity: Moderate (around 35 W/m·K)

Applications

• Marine components such as propeller shafts, pump parts, and valves

• Electrical connectors, busbars, and architectural metalwork

• Heat exchanger tubes and plumbing fittings