BS ISO 16220-2017 PDF

Full title and description

STB BS ISO 16220-2017 — Magnesium and magnesium alloys — Magnesium alloy ingots and castings. This standard specifies designation, chemical composition limits, mechanical-property requirements and test / sampling procedures for magnesium alloy ingots and castings used by producers, foundries and purchasers to ensure material conformity and fitness for intended applications.

Abstract

ISO 16220:2017 defines material designation (including temper and casting-process designations), required chemical compositions for listed magnesium alloys, mechanical-property requirements for separately cast test samples and, by agreement, for samples taken from castings. It also covers sampling, test-piece design, tensile and Brinell hardness test methods, retest rules and numerical rounding conventions; an informative annex lists ISO and equivalent alloy designations.

General information

• Status: Published (International Standard; confirmed on review and current as of latest ISO review).
• Publication date: April 2017 (third edition / 2017). BSI adoption/publication date shown as May 9, 2017.
• Publisher: International Organization for Standardization (ISO); available as a national adoption (BS ISO 16220:2017) via BSI.
• ICS / categories: 77.150.20 (Magnesium products) — also related to non‑ferrous metals / magnesium and magnesium alloys classifications.
• Edition / version: Third edition — ISO 16220:2017.
• Number of pages: ISO bibliographic record: 18 pages (ISO format); national/BS publication copies may display a different page count (for example BSI distribution shows a 28‑page PDF).

Scope

ISO 16220:2017 applies to magnesium alloy ingots and castings and specifies designation rules, chemical-composition limits for specified alloys, mechanical-property requirements for cast samples, sampling frequency and methods, test-piece geometry, tensile and hardness test procedures, retest criteria and rounding rules. The standard is intended for use where materials are ordered, tested and verified between suppliers, processors and purchasers.

Key topics and requirements

• Material designation system including alloy, temper and casting-process identifiers.
• Chemical composition limits for listed magnesium alloys (specified element limits and compositional tolerances).
• Mechanical-property requirements (tensile properties and Brinell hardness) for separately cast test samples and, where agreed, for samples taken from castings.
• Sampling plans and frequency, with rules for acceptance and retesting.
• Test-piece design and preparation for different casting processes (sand, permanent-mould, pressure-die, investment casting and cut-from-casting samples).
• Prescribed test methods (tensile test, Brinell hardness) and rounding conventions for reported values.
• Informative annex listing ISO and equivalent international alloy designations to aid cross-referencing.

Typical use and users

Manufacturers of magnesium ingots and castings, foundries, metallurgical and materials engineers, quality assurance and testing laboratories, procurement and specification writers, and national standards/adoption bodies use this standard to specify, verify and document alloy chemistry and mechanical performance of magnesium cast products. It is commonly referenced in purchasing specifications, material certificates and conformity testing.

Related standards

The 2017 edition replaces earlier editions and amendments (ISO 16220:2005 and ISO 16220:2005/Amd 1:2007). Related regional and national cast‑metal delivery specifications (for example various EN standards addressing castings and additional requirements for magnesium castings) are often used alongside ISO 16220; consult national adoption documents for exact cross‑references and additional requirements.

Keywords

magnesium, magnesium alloys, ingots, castings, alloy designation, chemical composition, mechanical properties, tensile test, Brinell hardness, sampling, test pieces, foundry, material specification.

FAQ

Q: What is this standard?

A: ISO 16220:2017 (published as BS ISO 16220:2017 in BSI adoption) is an international standard that specifies designation, chemical-composition limits and mechanical-property/testing requirements for magnesium alloy ingots and castings.

Q: What does it cover?

A: It covers alloy designation, temper and casting-process designation, chemical composition for listed alloys, mechanical-property requirements (tensile and Brinell hardness), sampling and test-piece preparations, test methods, retest rules and rounding conventions, plus an informative alloy-designation annex.

Q: Who typically uses it?

A: Foundries and producers of magnesium castings and ingots, metallurgical and materials engineers, testing laboratories, purchasers specifying magnesium materials, and standards/adoption bodies are the primary users.

Q: Is it current or superseded?

A: ISO 16220:2017 is the third edition (2017) of the standard. According to ISO’s bibliographic record the 2017 edition has been reviewed and confirmed (most recent confirmation noted in ISO records), so the 2017 text remains the current edition unless a newer revision has been published after that confirmation. For national adoptions (BS ISO 16220:2017) consult the national body for any national forewords or additional requirements.

Q: Is it part of a series?

A: It is part of ISO’s body of standards covering non‑ferrous metals and specifically magnesium and its alloys; the document replaces earlier editions (2005 and its amendment) and is used alongside other metallurgical and casting delivery standards (regional ENs and national standards) relevant to magnesium products.

Q: What are the key keywords?

A: Magnesium, magnesium alloy, ingot, casting, alloy designation, chemical composition, tensile strength, Brinell hardness, sampling, test pieces.