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This specification covers the standard requirements for wrought low-carbon iron having a carbon content of 0.015% or less with the remainder of the analysis being substantially iron. Two alloy types are covered: Type 1 is a low-phosphorus grade and Type 2 contains a phosphorus addition to improve machinability. The alloy specimens shall conform to the required chemical compositions of carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, vanadium, titanium, aluminum and iron. The alloys shall be produced in a wide variety of forms and conditions namely: forging billet; hot-rolled product; cold-finished bars; strip; wire; and relay condition. The alloy materials shall undergo heat treatment. Magnetic testing shall also be performed wherein the alloys shall conform to the required values of the coercive field strength.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification covers the requirements for wrought low-carbon iron typically having a carbon content of 0.015 % or less with the remainder of the chemical composition being substantially iron.
1.1.1 Two alloy types are covered: Type 1 is a low-phosphorous grade and Type 2 contains a phosphorous addition to improve machinability.
1.2 This specification also covers alloys supplied by a producer or converter in the form and condition suitable for fabrication into parts which will be subsequently heat treated to create the desired magnetic characteristics. It covers alloys supplied in the form of forging billets, hot-rolled products, and cold-finished bar, wire, and strip.
1.3 This specification does not cover iron powders capable of being processed into magnetic components. Please refer to the following ASTM Standards for information regarding powdered metal materials and magnetic components: Specifications , , and .
1.4 This specification does not cover flat-rolled, low-carbon electrical steels. Please refer to Specification for information regarding these materials.
1.5 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 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 and health practices and determine the applicability of regulatory limitations prior to use.
1.7 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A34/A34M Practice for Sampling and Procurement Testing of Magnetic Materials
A340 Terminology of Symbols and Definitions Relating to Magnetic Testing
A341/A341M Test Method for Direct Current Magnetic Properties of Soft Magnetic Materials Using D-C Permeameters and the Point by Point (Ballistic) Test Methods
A596/A596M Test Method for Direct-Current Magnetic Properties of Materials Using the Ballistic Method and Ring Specimens
A726 Specification for Cold-Rolled Magnetic Lamination Quality Steel, Semiprocessed Types
A773/A773M Test Method for Direct Current Magnetic Properties of Low Coercivity Magnetic Materials Using Hysteresigraphs
A811 Specification for Soft Magnetic Iron Parts Fabricated by Powder Metallurgy Techniques
A839 Specification for Iron-Phosphorus Powder Metallurgy Parts for Soft Magnetic Applications
A904 Specification for 50 Nickel-50 Iron Powder Metallurgy Soft Magnetic Parts
OtherIEC Publication 60404-7 Magnetic MaterialsPart 7: Method of Measurement of the Coercivity of Magnetic Materials in an Open Magnetic Circuit Available from International Electrotechnical Commission (IEC), 3, rue de Varemb, 1st Floor, P.O. Box 131, CH-1211, Geneva 20, Switzerland, http://www.iec.ch.
ICS Number Code 77.140.40 (Steels with special magnetic properties)
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ASTM A848-17, Standard Specification for Low-Carbon Magnetic Iron, ASTM International, West Conshohocken, PA, 2017, www.astm.orgBack to Top