ASTM B441-22 PDF

Full title and description

Standard Specification for Copper‑Cobalt‑Beryllium Alloy, Copper‑Nickel‑Beryllium Alloy, Copper‑Nickel‑Lead‑Beryllium Alloy, and Copper‑Nickel‑Cobalt Alloy Rod and Bar (Designation B441‑22). This specification establishes requirements for rod and bar in straight lengths for the indicated copper‑beryllium and related alloys, including mechanical, electrical conductivity and chemical composition requirements, available tempers, and ordering/inspection provisions.

Abstract

ASTM B441‑22 specifies chemical composition, temper designations, mechanical properties (tensile and Rockwell hardness), electrical conductivity criteria, sampling and test methods, and packaging/marking for copper‑beryllium and related copper‑nickel/lead/cobalt beryllium alloys supplied as rod and bar (UNS C17500, C17510, C17540, and C17465). The document is concise (4 pages) and intended for procurement, manufacturing and quality control of these wrought products.

General information

• Status: Current (active specification).
• Publication date: Published/last updated November 2022 (Edition B441‑22; current edition approved in late 2022).
• Publisher: ASTM International (Committee B05 on Copper and Copper Alloys, Subcommittee B05.02 on Rod, Bar, Wire, Shapes and Forgings).
• ICS / categories: 77.150.30 — Copper products / Copper alloys.
• Edition / version: B441‑22 (2022 revision).
• Number of pages: 4 pages (concise specification).

Scope

This specification establishes requirements for copper‑cobalt‑beryllium (UNS C17500), copper‑nickel‑beryllium (UNS C17510 / C17540), and copper‑nickel‑lead‑beryllium (UNS C17465) rod and bar supplied in straight lengths. It covers permitted tempers, required tests (tension, Rockwell hardness, electrical conductivity), chemical composition limits, sampling, inspection, certification, and ordering information. Metric conversions are provided for information but inch‑pound units are primary.

Key topics and requirements

• Applicable alloys and UNS numbers: C17500, C17510, C17540, C17465 (copper‑beryllium and related variants).
• Available tempers and designations (examples): TB00 (solution heat treated), TF00 (precipitation hardened), TD04 (solution heat treated and cold worked — hard), TH04 (hard and precipitation heat treated).
• Mechanical property requirements: tensile strength and Rockwell hardness limits and test methods (referenced ASTM test methods such as E8/E8M and E18).
• Electrical conductivity requirement: electrical conductivity is used as an acceptance/rejection criterion in production testing (E1004 referenced for eddy‑current method).
• Chemical composition limits: specified element ranges for beryllium, cobalt, nickel, lead and other trace elements per UNS designations. (Typical composition tables are provided in the specification and widely reproduced by material suppliers.)
• Referenced general requirements and additional standards: incorporation of B249/B249M (general requirements for wrought copper/alloy rod/bar), B193, B194, B846, and other ASTM test procedures and reporting/packaging clauses.
• Ordering information and supplementary requirements: specific ordering options (alloy, temper, form, dimensions, certifications, supplementary requirements) and packaging/marking instructions.

Typical use and users

Used by material producers, mill quality/control engineers, procurement and purchasing agents, designers and specifiers of electrical contacts, springs, connectors and precision components where copper‑beryllium and related alloys are required for a combination of strength, conductivity and wear resistance. Also used by testing laboratories and defense/aerospace suppliers that require certified rod and bar stock to these UNS designations.

Related standards

ASTM B249/B249M (General requirements for wrought copper and copper‑alloy rod, bar, shapes and forgings); B193 (resistivity test method); B194 (copper‑beryllium plate/sheet/strip/rolled bar); B846 (terminology for copper and copper alloys); E8/E8M (tension testing); E18 (Rockwell hardness); E1004 (electrical conductivity by eddy current). These referenced standards are incorporated or cited within B441‑22.

Keywords

ASTM B441, copper‑beryllium, copper‑nickel‑beryllium, copper rod, alloy bar, UNS C17500, UNS C17510, UNS C17465, tempers, tensile, Rockwell, electrical conductivity, rod and bar specification.

FAQ

Q: What is this standard?

A: ASTM B441‑22 is an ASTM International specification that defines requirements for copper‑beryllium and related copper‑nickel/lead/cobalt beryllium alloys supplied as rod and bar, covering composition, tempers, mechanical and electrical acceptance criteria, testing, and ordering information.

Q: What does it cover?

A: It covers UNS designations C17500, C17510, C17540 and C17465 for rod and bar in straight lengths, prescribing chemical composition limits, permitted tempers, tensile and hardness requirements, electrical conductivity acceptance, sampling/inspection, and packaging/marking.

Q: Who typically uses it?

A: Material suppliers, manufacturers of precision components (contacts, springs, connectors), quality/inspection labs, purchasing/specifications engineers, and defense or aerospace contractors who require certified copper‑beryllium rod and bar.

Q: Is it current or superseded?

A: The B441‑22 edition is the 2022 revision (current as published in late 2022). Users should confirm the active status before purchase/use because standards may be withdrawn or updated after publication; the ASTM store shows the B441‑22 edition as active (last updated November 2022).

Q: Is it part of a series?

A: B441 is part of the ASTM Book of Standards volume covering copper and copper alloys (Volume 02.01) and is linked to general requirements/specifications for wrought copper products (e.g., B249/B249M) and related test methods.

Q: What are the key keywords?

A: Copper‑beryllium, copper‑nickel‑beryllium, UNS C17500, UNS C17510, UNS C17465, rod and bar specification, tempers, tensile strength, Rockwell hardness, electrical conductivity.