ASTM B197/B197M-20e1 PDF

Full title and description

ASTM B197/B197M-20e1 — Standard Specification for Copper‑Beryllium Alloy Wire. This standard specifies requirements for copper‑beryllium alloy wire (UNS C17200 and C17300) supplied in coils, spools, or other than straight lengths and of any uniform cross section, including temper designations, sampling, dimensional, mechanical, physical and chemical requirements.

Abstract

The specification establishes accepted alloys (primarily UNS C17200 and C17300), allowable tempers (solution heat‑treated and various cold‑worked/precipitation‑heat‑treated conditions), and required tests and acceptance criteria for dimensional (diameter, thickness, width, length, straightness), mechanical (tensile and bend properties, Rockwell hardness, elongation), physical (grain size/count), and chemical composition characteristics. It notes that inch‑pound and SI units are each to be treated as independent standards and includes a safety caveat for test methods.

General information

• Status: Active (includes amendment/e1; standard updated with errata/change notice Nov 21, 2022).
• Publication date: 1 June 2020 (designation B197/B197M-20e1).
• Publisher: ASTM International.
• ICS / categories: Copper products — 77.150.30.
• Edition / version: B197/B197M‑20e1 (2020 edition with e1 update).
• Number of pages: 5 pages.

Scope

This specification applies to copper‑beryllium alloy wire in coils, spools, or other than straight lengths, of any uniform cross section, and includes UNS C17200 and C17300. Unless otherwise specified, UNS C17200 is the default alloy furnished. The standard establishes unit conventions (inch‑pound and SI are independent) and prescribes sampling and test procedures for dimensional, mechanical, physical, and chemical conformity.

Key topics and requirements

• Alloy designations covered: UNS C17200 (primary) and UNS C17300.
• Forms: wire supplied in coils, spools, or other non‑straight lengths of uniform cross section.
• Tempers: solution heat‑treated (TB00), cold‑worked tempers (TD00–TD04) with precipitation heat treatment after forming, and manufacturer‑precipitation‑heat‑treated tempers (TF00/TH01–TH04).
• Dimensional requirements: diameter, thickness, width, length, and straightness tolerances and sampling.
• Mechanical tests and limits: tensile strength, bend strength, Rockwell hardness, and elongation acceptance criteria.
• Physical and metallographic checks: grain size and grain count where specified.
• Chemical composition: required composition limits for Cu, Be and minor alloying elements, with required chemical analysis.
• Units and tolerances: inch‑pound and SI values are stated separately and must not be interchanged.
• Safety note: the standard does not by itself address all safety concerns; users must establish appropriate safety, health and environmental practices for test methods and handling.

Typical use and users

Used by metallurgical and materials engineers, wire manufacturers and mills, suppliers of beryllium‑copper products, quality and inspection personnel, procurement and purchasing departments, and designers of electrical contacts, springs, connectors, and high‑reliability components in aerospace, telecommunications, electronics, and industrial applications where a combination of strength, conductivity and fatigue resistance is required.

Related standards

Standards commonly referenced with or complementary to B197/B197M include ASTM B194 (plate, sheet, strip and rolled bar), ASTM B196/B196M (rod and bar), ASTM B643 (seamless tube), ASTM B570 (forgings and extrusions), and other copper‑beryllium product specifications in the ASTM B0x series. These related documents cover other product forms and detailed processing or product‑specific requirements.

Keywords

copper‑beryllium, beryllium copper, C17200, C17300, wire, coil, spool, tempers, precipitation hardening, tensile strength, Rockwell hardness, grain size, ASTM B197, B197M, electrical contacts, springs.

FAQ

Q: What is this standard?

A: ASTM B197/B197M‑20e1 is the ASTM International standard specification that defines requirements for copper‑beryllium alloy wire (primarily UNS C17200 and C17300) supplied in coils, spools, or other than straight lengths.

Q: What does it cover?

A: It covers allowable alloys and tempers, dimensional tolerances, required mechanical and physical tests (tensile, bend, hardness, elongation, grain size), chemical composition limits, sampling procedures, and unit conventions (separate inch‑pound and SI values).

Q: Who typically uses it?

A: Wire manufacturers and mills, quality inspectors, material engineers, design engineers for electrical connectors and springs, and purchasing/procurement teams specifying beryllium‑copper wire for aerospace, electronics, telecommunications, and industrial components.

Q: Is it current or superseded?

A: The designation B197/B197M‑20e1 is the 2020 edition with an e1 update; the standard is listed as active and includes the amendment/e1 (errata/change notice) published in November 2022. Users should confirm they have the latest ASTM record or any subsequent revisions before procurement.

Q: Is it part of a series?

A: Yes — it is part of ASTM’s nonferrous/copper products series (Book of Standards volume covering copper and copper alloys) and is maintained by the relevant ASTM subcommittee for copper‑base alloys; related ASTM product specifications cover other forms of copper‑beryllium (plates, rods, tubes, forgings, etc.).

Q: What are the key keywords?

A: copper‑beryllium, beryllium copper, C17200, C17300, wire, tempers, precipitation heat treatment, tensile strength, Rockwell hardness, ASTM.