High-temperature Copper Sealing Washers For Electrical Connections

描述

High-temperature Copper Sealing Washers For Electrical Connections

1. What is a Copper Washer?

A copper washer is a flat, ring-shaped sealing component typically placed between a fastener (such as a bolt or nut) and a mating surface. It helps distribute pressure, prevent leaks, and improve electrical conductivity in various industrial and mechanical applications.

2. Material Composition

Copper washers are primarily made from high-purity copper or copper alloys , including:

Pure Copper (C10100, C11000) – Excellent electrical/thermal conductivity and corrosion resistance.
Beryllium Copper (C17200, C17500) – High strength, fatigue resistance, and non-sparking properties.
Phosphor Bronze (C51000, C52100) – Enhanced durability and resistance to wear/deformation.
Brass (C26000, C36000) – A copper-zinc alloy offering good machinability and moderate conductivity.

3. Surface Treatments

To enhance performance, copper washers may undergo:

Annealing – Softens the material for better sealing deformation.
Electroplating (e.g., tin, nickel, or silver plating) – Improves corrosion resistance and solderability.
Passivation – Forms an oxide layer to prevent oxidation.
Anti-Galling Coatings – Reduces friction in high-pressure environments.

4. Key Features & Benefits

Thermal & Electrical Conductivity – Ideal for heat exchangers, electrical grounding, and electronics.
Malleability – Conforms to uneven surfaces for a tight seal.
Corrosion Resistance – Suitable for plumbing, marine, and chemical industries.
High-Temperature Stability – Withstands up to 200–300°C (higher for beryllium copper).
Non-Sparking – Critical for explosive environments (e.g., oil/gas).

5. Common Applications

Automotive: Cylinder heads, fuel systems, brake lines.
Plumbing: Pipe fittings, water/gas valves.
Electronics: Battery terminals, circuit boards.
Industrial: Hydraulic systems, compressors, power plants.
Aerospace: Engine components, fuel manifolds.

6. Standards & Specifications

ASTM B370 (Copper Sheet/Strip for Washers)
DIN 7603 (Metric Copper Washers)
SAE J463 (Beryllium Copper Standards)

7. Specifications