ASTM B422/B422M-22 PDF

Full title and description

Standard Specification for Copper‑Aluminum‑Silicon‑Cobalt Alloy, Copper‑Nickel‑Silicon‑Magnesium Alloy, Copper‑Nickel‑Silicon Alloy, Copper‑Nickel‑Aluminum‑Magnesium Alloy, and Copper‑Nickel‑Tin Alloy Sheet and Strip (ASTM B422/B422M‑22). The specification establishes requirements for sheet and strip of specified copper alloys (UNS numbers), including dimensional, mechanical, electrical resistivity, and chemical composition requirements, and defines ordering, temper, and testing criteria.

Abstract

This specification covers sheets and strips of a family of copper alloys (including copper‑aluminum‑silicon‑cobalt and several copper‑nickel variants) identified by UNS numbers. It specifies allowable dimensions and tolerances, mechanical-property requirements (tensile/yield/elongation), electrical resistivity limits, chemical composition limits, temper designations, and sampling/test procedures. Values are provided in both inch‑pound and SI systems (to be used independently).

General information

• Status: Current / Active (2022 edition).
• Publication date: October 1, 2022 (B422/B422M‑22); ASTM webstore record updated October 14, 2022.
• Publisher: ASTM International (formerly American Society for Testing and Materials).
• ICS / categories: 77.150.30 — Copper products (Copper and copper alloys).
• Edition / version: B422/B422M‑22 (2022 revision), revises B422/B422M‑17.
• Number of pages: 5 pages.

Scope

ASTM B422/B422M‑22 establishes requirements for sheets and strips of specific copper alloys identified by UNS numbers (examples include C19002, C19010, C19015, C19020, C19025, C63800, C64725, C70250, C70260, C70265, C70310, C70350). The standard covers product forms (sheet, strip), dimensional tolerances (thickness, width, length, straightness, edges), temper designations and mill‑hardened conditions, mechanical properties (tensile strength, 0.2% offset yield, elongation), electrical resistivity, and chemical composition. Inch‑pound and SI units are both provided and are to be used independently.

Key topics and requirements

• Alloy coverage: lists UNS alloy numbers for copper‑aluminum‑silicon‑cobalt and multiple copper‑nickel family alloys.
• Product form and dimensions: sheet and strip; tolerances for thickness, width, length, straightness, and edge types (slit, sheared, sawed, etc.).
• Mechanical properties: requirements for tensile strength, yield (0.2% offset where applicable), elongation and ductility/formability for specified tempers.
• Chemical composition: element limits (Cu, Ni, Si, Al, Mg, Sn, Fe, Zn, Pb, etc.) for each UNS alloy.
• Electrical resistivity limits specified for certain alloys/temper conditions where conductivity is a control.
• Tempers and hardness: designation of available tempers including mill‑hardened conditions and associated test methods (e.g., tensile for mill‑hardened tempers).
• Testing, sampling and acceptance: sampling and test schedules, referenced ASTM test methods and practices; purchaser options for additional tests.
• Units and equivalency: inch‑pound and SI units provided separately; values are not exact equivalents and must be used independently.
• Ordering information: required purchaser choices (designation/year, alloy UNS no., temper, dimensions, form, edge, quantity, testing requirements, and any supplementary requirements).
• Notes on patented alloys and alternatives: the standard may contain alloys covered by patents; alternatives and substitutions are noted where relevant.

Typical use and users

Used by material suppliers and mill producers of copper alloy sheet and strip, OEMs and fabricators specifying raw materials for connectors, electrical components, heat‑exchanger fins, springs and precision strip parts, procurement/specification engineers, quality and testing laboratories, and standards committees. Typical industries include electrical/electronics, HVAC, automotive, marine, plumbing, and general engineering where specific combinations of strength, formability and electrical properties are required.

Related standards

Commonly referenced companion and related standards include ASTM B248 / B248M (General requirements for wrought copper and copper‑alloy plate, sheet, strip, and rolled bar), Practice E527 (UNS system for metals), Terminology B846 (terms for copper and copper alloys), and other ASTM product and test standards for copper alloys and mechanical/electrical testing that are cited within B422/B422M‑22.

Keywords

copper alloy, sheet, strip, UNS, C19002, C19010, C19015, C19020, C19025, C63800, C64725, C70250, C70260, C70265, C70310, C70350, tensile, yield, elongation, electrical resistivity, chemical composition, temper, mill‑hardened, B422, B422M, ASTM

FAQ

Q: What is this standard?

A: ASTM B422/B422M‑22 is the 2022 ASTM specification that defines requirements for selected copper‑based sheet and strip alloys, including dimensional, mechanical, electrical, and chemical property limits.

Q: What does it cover?

A: It covers sheets and strips of specified copper‑aluminum and copper‑nickel family alloys (listed by UNS numbers), specifying dimensions and tolerances, tempers, mechanical properties, electrical resistivity where applicable, chemical composition, testing and ordering information.

Q: Who typically uses it?

A: Material producers, metal service centers, product designers and engineers, procurement/specification teams, and testing labs in industries requiring controlled copper alloy strip and sheet—electrical/electronic components, heat exchangers, springs, connectors, plumbing and marine applications.

Q: Is it current or superseded?

A: The B422/B422M‑22 edition is the 2022 revision and is the current active edition; it revises and supersedes the prior B422/B422M‑17 edition. (Publication October 1, 2022; ASTM store record shows an update on October 14, 2022.)

Q: Is it part of a series?

A: Yes — it is part of ASTM's B02 series covering copper and copper alloys (Book of Standards Volume 02.01) and is used together with general requirements standards (e.g., B248/B248M) and referenced test/practice documents for copper products.

Q: What are the key keywords?

A: Copper alloy, sheet, strip, UNS numbers (C19002, C19010, C19015, C19020, C19025, C63800, C64725, C70250, C70260, C70265, C70310, C70350), mechanical properties, chemical composition, electrical resistivity, temper, B422, B422M, ASTM.