ASTM A867-19
Standard Specification for Iron-Silicon Relay Steels

Standard No.
ASTM A867-19
Release Date
2019
Published By
American Society for Testing and Materials (ASTM)
Latest
ASTM A867-19
Scope
1.1 This specification covers wrought iron-silicon (Fe-Si) steels that are generally used in the manufacture of electromechanical devices, such as relays and solenoids, requiring higher electrical resistivity, higher permeability, and lower coercivity and residual magnetism than provided by either carbon steels or soft magnetic low-carbon irons. The steels covered in this specification are: Steel Type Nominal Composition 1 1.1 % Si-Fe 1F 1.1 % Si-Fe free machining 2 2.3 % Si-Fe 2F 2.3 % Si-Fe free machining 3 4.0 % Si-Fe 1.2 This specification covers steels in the form and condition required for fabrication into parts. The fabricated parts typically require a final heat treatment to obtain the desired magnetic performance. The term mill annealed as used in this specification applies to a heat treatment, typically applied by the producer, intended to improve formability. The mill anneal does not provide the optimum magnetic performance and is not intended to replace the need for the finish annealing of parts. 1.3 This specification covers steels in the form of forging billets, hot-rolled bar and strip, cold-finished bar, wire, and cold-rolled strip in thicknesses up to 6.35 mm (0.250 in.). 1.4 This specification does not cover electrical sheet steels used in transformer and motor laminations. Please refer to Specifications A677, A683, A726, A876, and A1086 for standards pertaining to these material types. 1.5 This specification does not cover powder metallurgy materials capable of being processed into magnetic core components having similar silicon contents. 1.6 The 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. 1.6.1 There are selected values presented in two units, both of which are in acceptable SI units. These are differentiated by the word “or,” as in “µΩ-cm, or, Ω-m.” 1.7 This 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. 1.8 This 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.

ASTM A867-19 Referenced Document

  • ASTM A1086 Standard Specification for Thin-Gauge Nonoriented Electrical Steel Fully Processed Types*， 2020-06-01 Update
  • ASTM A34/A34M Standard Practice for Sampling and Procurement Testing of Magnetic Materials
  • ASTM A341/A341M Standard Test Method for Direct Current Magnetic Properties of Soft Magnetic Materials Using D-C Permeameters and the Point by Point (Ballistic) Test Methods*， 2022-10-01 Update
  • ASTM A596/A596M Standard Test Method for Direct-Current Magnetic Properties of Materials Using the Ballistic Method and Ring Specimens
  • ASTM A677 Standard Specification for Nonoriented Electrical Steel Fully Processed Types*， 2023-12-01 Update
  • ASTM A683 Standard Specification for Nonoriented Electrical Steel, Semiprocessed Types*， 2023-12-01 Update
  • ASTM A726 Standard Specification for Cold-Rolled Magnetic Lamination Quality Steel, Semiprocessed Types
  • ASTM A773/A773M Standard Test Method for dc Magnetic Properties of Materials Using Ring and Permeameter Procedures with dc Electronic Hysteresigraphs
  • ASTM A876 Standard Specification for Flat-Rolled, Grain-Oriented, Silicon-Iron, Electrical Steel, Fully Processed Types

ASTM A867-19 history

Standard Specification for Iron-Silicon Relay Steels


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