ASTM B823-20 (2024) PDF

Full title and description

Standard Specification for Materials for Copper Base Powder Metallurgy (PM) Structural Parts — ASTM B823‑20(2024). This specification defines a classification/designation system and material requirements for a variety of copper‑base powder metallurgy structural materials, including grades intended for applications requiring high electrical conductivity.

Abstract

ASTM B823‑20(2024) establishes material designations, chemical composition limits, minimum mechanical properties (including tensile/yield requirements), and ordering information for copper‑base powder metallurgy (PM) structural parts. The standard provides guidance on units, density reporting, and classification codes used to identify and specify PM copper alloys for structural and electrical applications.

General information

• Status: Active (current edition listed as ASTM B823‑20(2024)).
• Publication date: Latest revision year 2024 (current as of late 2024 / listed in ASTM Book of Standards 2024).
• Publisher: ASTM International (American Society for Testing and Materials).
• ICS / categories: 77.120.01 (Non‑ferrous metals in general); 77.160 (Powder metallurgy).
• Edition / version: B823‑20 (designated B823‑20(2024) for the 2024 listing).
• Number of pages: 7 pages.

Scope

The specification covers a range of copper‑base powder metallurgy structural materials and establishes a material designation code that incorporates chemical composition and minimum mechanical property requirements. It applies to materials used for structural parts made by powder metallurgy, including grades intended for high electrical conductivity and other functional requirements. Units are provided in inch‑pound with SI conversions for information; density is reported in g/cm³. The standard also describes ordering information and certification options for parts specified under this document.

Key topics and requirements

• Material designation/classification system for copper‑base PM structural materials.
• Specified chemical composition ranges for each material designation.
• Minimum tensile and yield strength requirements and related mechanical property limits.
• Density reporting conventions (gram per cubic centimeter) and unit conventions (inch‑pound standard, SI in parentheses).
• Ordering information: use of material designation codes, certification options, and purchaser‑specified requirements.
• Notes and appendix material explaining classification and special designations (e.g., high‑conductivity C‑0000 family).

Typical use and users

Used by powder metallurgy producers, materials and process engineers, design and specification engineers, quality and inspection laboratories, and procurement specialists. Typical applications include PM structural components in electrical connectors, bearings and bushings where copper‑base alloys are selected for conductivity, corrosion resistance, and mechanical performance in automotive, electrical, aerospace, and industrial equipment.

Related standards

Commonly referenced standards and complementary documents include other ASTM PM and nonferrous standards (examples: ASTM B853 for PM boron stainless steel structural components, B939 and B962 series for PM test methods and density determination), relevant MPIF publications, and applicable ASTM test methods for mechanical and chemical analysis used to verify compliance with B823 designations.

Keywords

copper, copper‑base, powder metallurgy, PM, structural parts, material designation, chemical composition, tensile strength, density, electrical conductivity, nonferrous alloys.

FAQ

Q: What is this standard?

A: ASTM B823‑20(2024) is a specification that defines materials, classification codes, and minimum requirements for copper‑base powder metallurgy structural parts.

Q: What does it cover?

A: It covers material designation, chemical composition limits, minimum mechanical properties (including tensile/yield), density reporting conventions, and ordering/certification information for copper‑base PM structural materials.

Q: Who typically uses it?

A: Powder metallurgy manufacturers, design and materials engineers, quality/inspection labs, spec writers, and purchasers for industries such as automotive, electrical/electronics, aerospace, and general industrial manufacturing.

Q: Is it current or superseded?

A: The document is listed as ASTM B823‑20(2024) and shown as the active/current edition in the 2024 Book of Standards listings; the B823‑20 edition is the baseline (20) with the 2024 listing indicating current status as of late 2024.

Q: Is it part of a series?

A: It is part of ASTM Committee B09 (Metal Powders and Metal Powder Products) publications and is often used alongside other PM specifications and PM test methods within the ASTM B and related series.

Q: What are the key keywords?

A: Copper, powder metallurgy, structural parts, nonferrous alloys, material designation, chemical composition, tensile strength, density.