Conductivity

Conductivity is a physical quantity that measures a material's ability to conduct electric current, typically expressed in siemens per meter (S/m) or International Annealed Copper Standard (%IACS). In foreign trade, this term is commonly found in specifications, contracts, and quality inspection clauses for products such as metals, alloys, wires and cables, electronic components, conductive adhesives, and thermal interface materials. Usage scenarios include: customers requesting conductivity data during inquiries, agreeing on conductivity specifications when signing contracts, and conducting third-party testing (e.g., SGS) before shipment with reports issued. Precautions: Different industries have different testing standards for conductivity (e.g., ASTM B193, GB/T 3048), so the test method, temperature conditions (usually 20°C), and units must be clearly specified; conductivity is different from resistivity (the two are reciprocals), and also different from thermal conductivity (heat conduction ability), and must not be confused. Compared with 'resistance,' conductivity emphasizes the intrinsic property of a material, while resistance is a property of a specific object. Foreign trade practitioners should ensure that the conductivity values in specifications match actual measurements to avoid returns or claims due to non-conforming indicators.