Q1: What is Ni80Cr20 (Nichrome 80/20) and what are its key properties?
A1: Ni80Cr20, also known as Nichrome 80/20, is a nickel-chromium alloy containing approximately 80% nickel and 20% chromium. It is highly resistant to oxidation and corrosion at high temperatures and maintains stable electrical resistance, making it ideal for heating applications.
Q2: What are the main applications of Ni80Cr20 sheets?
A2: Ni80Cr20 sheets are widely used in electrical heating elements, furnace components, resistance wires, and industrial heating systems. They are suitable for applications such as kilns, ovens, laboratory furnaces, and heating coils.
Q3: What temperature range can Ni80Cr20 withstand?
A3: Ni80Cr20 performs reliably at temperatures up to 1200 °C (2190 °F) in air. It resists oxidation even at prolonged high-temperature exposure, which makes it ideal for heating elements in furnaces and industrial ovens.
Q4: What are the mechanical and electrical properties of Ni80Cr20?
A4: Typical properties include:
Tensile strength: 550–750 MPa
Elongation: 15–40%
Density: ~8.4 g/cm³
Electrical resistivity: ~1.10 Ω·mm²/m
These properties provide excellent durability and stable electrical performance under heating cycles.
Q5: How can Ni80Cr20 sheets be processed or fabricated?
A5: Ni80Cr20 sheets can be cut, stamped, or bent into various shapes for heating elements. They can be welded using appropriate high-temperature techniques. Annealing is sometimes applied to improve ductility before forming. The sheets are usually supplied in rolled and annealed condition to ensure uniform properties.
