ASTM B559-12(2023) PDF

Overview

ASTM B559-12(2023), Standard Specification for Nickel-Coated, Copper-Clad Steel Wire for Electronic Application, establishes internationally recognized requirements for nickel-coated, round, copper-clad steel wire intended for use in electronic components. Developed by ASTM International, this standard ensures uniform quality, performance, and interoperability for nickel-coated, copper-clad steel wires deployed in demanding electronic applications. It addresses the composition, coating mass, mechanical properties, electrical resistivity, and quality assurance protocols for wire used in electrical conductors, telecommunications, and signal transmission.

Key Topics

• Material Composition: Specifies round steel wire clad with copper, coated with varying thicknesses of nickel (2%, 4%, 7%, 10%, or 27% of wire mass).
• Wire Classes: Defines four product classes based on conductivity and mechanical condition:
  • N30HS: 30% conductivity, hard drawn
  • N30A: 30% conductivity, annealed
  • N40HS: 40% conductivity, hard drawn
  • N40A: 40% conductivity, annealed
• Coating Requirements: Mandates a nickel coating that is continuous, adherent, and meets minimum mass percentages; thickness information is provided for reference.
• Physical and Electrical Properties: Includes requirements for tensile strength, elongation, and electrical resistivity, ensuring mechanical durability and reliable conductivity.
• Quality Control and Testing: Outlines procedures for sampling, coating continuity, resistivity tests, and adherence verification. Details standardized test methods, such as sodium polysulfide immersion and wrapping tests for coating validation.
• Packaging and Marking: Sets guidelines for package size, integrity during handling and shipping, and proper identification to ensure chain-of-custody and usability.

Applications

ASTM B559-12(2023) is essential for manufacturers, suppliers, and users of specialty wire in sectors where precise electrical and mechanical performance are critical:

• Electronic Components: Used for manufacturing connectors, leads, and interconnections in devices requiring corrosion resistance, high conductivity, and mechanical strength.
• Telecommunications and Signal Cables: Ideal for signal-carrying cables in telecommunications where enhanced durability and conductivity are needed.
• Aerospace and Defense Electronics: Specified by agencies such as the U.S. Department of Defense for high-reliability electronic assemblies.
• Other Electrical Assemblies: Suitable for applications requiring resistance to oxidation, such as coils, relays, and printed circuit connections.

By conforming to this standard, manufacturers ensure that their products consistently meet recognized international criteria for safety, performance, and interoperability, facilitating cross-border trade and usage.

Related Standards

For a comprehensive understanding of standards governing the production and testing of electrical conductor wire, the following documents are referenced within ASTM B559-12(2023):

• ASTM B193: Test Method for Resistivity of Electrical Conductor Materials
• ASTM B258: Specification for Standard Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Used as Electrical Conductors
• ASTM B452: Specification for Copper-Clad Steel Wire for Electronic Application
• NIST HB 100: Copper Wire Tables for conversion and sizing references

Compliance with ASTM B559-12(2023) supports quality assurance, helps meet regulatory requirements, and maintains global interoperability for nickel-coated, copper-clad steel wire in electronic applications.

Keywords: nickel-coated wire, copper-clad steel, electronic application, ASTM B559, electrical conductor, wire specification, resistivity, nickel coating, wire testing, standard compliance