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ASTM A 838 : 2018

Current
Current

The latest, up-to-date edition.

Standard Specification for Free-Machining Ferritic Stainless Soft Magnetic Alloy Bar for Relay Applications
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

10-17-2018

1.1This specification covers free-machining ferritic stainless soft magnetic alloy produced or supplied expressly in cold-finished bar form for use in magnetic cores and other parts requiring a high permeability, low-coercivity stainless steel.

1.1.1This specification does not cover either cast parts or parts produced by powder metallurgy techniques.

1.2Two specific alloy types are covered. The primary constituents are shown in Table 1. These types have corrosion resistance similar to AISI Type 430F and Type 430F, Specification A582/A582M.

1.3This specification covers only these alloy types supplied in cold-finished bars in cross-sectional shapes such as rounds, squares, hexagons, and octagons with diameters (diagonals) greater than or equal to 6.35 mm (0.250 in.) and less than or equal to 41.5 mm (1.63 in.).2

1.4Certain cold-finished round bar products are capable of being supplied mill annealed to required magnetic properties such as low coercivity. The size range that can be mill annealed is from 6.35 to 41.5 mm (0.250 to 1.63 in.). Other products of these alloys cannot be mill annealed to produce equivalently low coercivity; hence, the final machined parts should be heat treated as recommended by the producer.

1.5The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to customary (cgs-emu and inch-pound) units which are provided for information only and are not considered standard.

1.6This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.7This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Committee
A 06
DocumentType
Standard
Pages
4
PublisherName
American Society for Testing and Materials
Status
Current
Supersedes

ASTM A 596/A596M : 2014 Standard Test Method for Direct-Current Magnetic Properties of Materials Using the Ballistic Method and Ring Specimens
ASTM A 340 : 2023 : REV A Standard Terminology of Symbols and Definitions Relating to Magnetic Testing
ASTM A 34/A34M : 2006 : R2021 Standard Practice for Sampling and Procurement Testing of Magnetic Materials
ASTM A 582/A582M : 2021 Standard Specification for Free-Machining Stainless Steel Bars
ASTM A 596/A596M : 2021 Standard Test Method for Direct-Current Magnetic Properties of Materials Using the Point by Point (Ballistic) Method and Ring Specimens
ASTM A 773/A773M : 2021 Standard Test Method for Direct Current Magnetic Properties of Low Coercivity Magnetic Materials Using Hysteresigraphs
ASTM A 34/A34M : 2006 : R2018 Standard Practice for Sampling and Procurement Testing of Magnetic Materials
ASTM A 340 : 2021 Standard Terminology of Symbols and Definitions Relating to Magnetic Testing
ASTM E 1019 : 2018 Standard Test Methods for Determination of Carbon, Sulfur, Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt Alloys by Various Combustion and Inert Gas Fusion Techniques
ASTM A 582/A582M : 2022 Standard Specification for Free-Machining Stainless Steel Bars
ASTM A 341/A341M : 2016 : R2022 Standard Test Method for Direct Current Magnetic Properties of Soft Magnetic Materials Using D-C Permeameters and the Point by Point (Ballistic) Test Methods
ASTM A 582/A582M : 2012 : R2017 Standard Specification for Free-Machining Stainless Steel Bars
ASTM A 341/A341M : 2000 Standard Test Method for Direct Current Magnetic Properties of Materials Using D-C Permeameters and the Ballistic Test Methods
ASTM A 773/A773M : 2014 Standard Test Method for Direct Current Magnetic Properties of Low Coercivity Magnetic Materials Using Hysteresigraphs
ASTM A 340 : 2020 Standard Terminology of Symbols and Definitions Relating to Magnetic Testing
ASTM A 341/A341M : 2016 Standard Test Method for Direct Current Magnetic Properties of Soft Magnetic Materials Using D-C Permeameters and the Point by Point (Ballistic) Test Methods
ASTM A 340 : 2022 Standard Terminology of Symbols and Definitions Relating to Magnetic Testing
ASTM A 582/A582M : 1995 : REV B Standard Specification for Free-Machining Stainless Steel Bars
ASTM E 1019 : 2000 Standard Test Methods for Determination of Carbon, Sulfur, Nitrogen, and Oxygen in Steel and in Iron, Nickel, and Cobalt Alloys
ASTM A 340 : 2023 Standard Terminology of Symbols and Definitions Relating to Magnetic Testing

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