ASTM B452-22 PDF

Full title and description

ASTM B452-22 — Standard Specification for Copper‑Clad Steel Wire for Electronic Application. This specification covers the requirements for bare, round copper‑clad steel wire used in electronic and electrical applications, defining classes by nominal conductivity and heat treatment and specifying mechanical, electrical, dimensional, and surface requirements for acceptance and ordering.

Abstract

ASTM B452-22 defines four classes of copper‑clad steel (nominal 30% and 40% conductivity, each available hard‑drawn or annealed) and provides requirements for material composition, tensile strength and elongation, electrical resistivity at 20 °C, dimensional measurement, adhesion of the copper cladding, torsion performance, surface finish, and ordering information for electronic applications.

General information

• Status: Active / Current.
• Publication date: Approved and published in May 2022 (designation B452‑22).
• Publisher: ASTM International.
• ICS / categories: 29.060.10 — Wires / Electrical conductors.
• Edition / version: B452‑22 (2022 edition).
• Number of pages: 5 pages (short specification).

Scope

The specification covers bare round copper‑clad steel wire intended for electronic application and defines four classes: Class 30HS (nominal 30% conductivity, hard‑drawn), Class 30HS‑A (30% annealed), Class 40HS (40% hard‑drawn), and Class 40HS‑A (40% annealed). It establishes mechanical and electrical acceptance criteria, measurement methods, and ordering information for suppliers and purchasers.

Key topics and requirements

• Material construction: steel core (open‑hearth, electric‑furnace, or basic‑oxygen) with continuous bonded copper cladding.
• Tensile strength and elongation requirements by wire size and class (minimums specified in tables).
• Electrical resistivity (measured at 20 °C) with maximum allowable values for each class.
• Dimensional measurement methods (micrometer caliper) and tolerances for diameters and cross‑sectional area.
• Adhesion and torsion tests to verify copper cladding bond and mechanical integrity.
• Surface finish and defect limits; packaging and ordering information (size, class, quantity, inspection requirements).
• Notes on units (inch‑pound primary; SI values in parentheses) and DoD acceptance where applicable.
• DOI and document identification: B0452‑22 (DOI cited in document metadata).

Typical use and users

Used by manufacturers and purchasers of electronic and telecommunications conductors where higher strength than pure copper is required (for example, spring‑strength conductors, wire‑to‑terminal connections, and certain coaxial/composite conductor applications). Typical users include wire and cable producers, electronics manufacturers, OEMs, procurement engineers, and test/quality laboratories.

Related standards

Standards related to copper‑clad and bi‑metallic conductors include IEC 61232 (and other international wire standards), national standards such as GB/T 3953, Telcordia GR‑347 (telecom durability/corrosion guidance), and related ASTM specifications covering bi‑metallic conductors and general copper/wire requirements (examples: ASTM B229, B249, B502, B520). Users often consult these documents together when specifying conductor performance and qualification.

Keywords

copper‑clad steel, copper‑clad wire, CCS, bi‑metallic conductor, electrical conductor, tensile strength, resistivity, torsion test, adhesion, electronic wire, ASTM B452.

FAQ

Q: What is this standard?

A: ASTM B452‑22 is a specification that sets material, mechanical, electrical, and inspection requirements for bare, round copper‑clad steel wire intended for electronic applications.

Q: What does it cover?

A: It covers four classes of copper‑clad steel wire (30% and 40% nominal conductivity, each hard‑drawn or annealed), defining tensile/elongation limits, resistivity at 20 °C, dimensional measurement, adhesion and torsion tests, surface quality, and ordering information.

Q: Who typically uses it?

A: Wire and cable manufacturers, electronics OEMs, procurement and quality engineers, and test laboratories specifying or verifying copper‑clad steel conductors for electronic and telecommunications applications.

Q: Is it current or superseded?

A: Current as of the 2022 edition (B452‑22). There are earlier editions (for example B452‑09 and prior), but B452‑22 is the active specification published in May 2022. Users should confirm any later amendments or reapprovals with ASTM before final procurement.

Q: Is it part of a series?

A: It is part of ASTM Committee B01 (Electrical Conductors) publications and sits among other bi‑metallic and conductor specifications (see related ASTM B‑series documents). It is referenced alongside international standards for conductor performance in telecom and electronics.

Q: What are the key keywords?

A: Copper‑clad steel, CCS, bi‑metallic conductor, electrical conductor, conductivity class, tensile strength, resistivity, adhesion, torsion test, electronic wire.