Abstract

This specification covers commonly used wrought nickel-iron soft magnetic alloys produced or supplied expressly for use in magnetic cores and other parts requiring high magnetic permeability, high electrical resistivity, low coercive field strength, and low core loss. Four specific alloy types are covered such as Alloy Type 1, 2, 3, and 4. Alloy Type 2 in thin-strip form is available two different grades. Grade 1 is semi-isotropic and is recommended for use in transformer laminations. Grade 2 is isotropic and is recommended for use inn rotating machinery laminations. These materials are capable of being produced in a wide variety of forms and conditions such as forging billet, hot-rolled plate, strip, and bar, cold-finished bars, cold-rolled sheep and strip, shaped bar and wire. The alloys shall conform to the required chemical composition for carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, cobalt, copper, and iron. Dc magnetic testing shall be the only magnetic test methods used for all product forma and sizes other than thin strip and sheet measuring magnetic permeability and coercive field strength. The physical properties of annealed alloy such as electrical resistivity, saturation induction, density, Curie temperature and mean linear coefficient of expansion shall be measured. Mechanical properties of cold-rolled hard temper strip such as yiled strength, ultimated tensile strength, elongation,and hardness.

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. Scope

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

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 Materials Using D-C Permeameters and the Ballistic Test Methods

A480/A480M Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip

A484/A484M Specification for General Requirements for Stainless Steel Bars, Billets, and Forgings

A555/A555M Specification for General Requirements for Stainless Steel Wire and Wire Rods

A596/A596M Test Method for Direct-Current Magnetic Properties of Materials Using the Ballistic Method and Ring Specimens

A772/A772M Test Method for AC Magnetic Permeability of Materials Using Sinusoidal Current

A773/A773M Test Method for dc Magnetic Properties of Materials Using Ring and Permeameter Procedures with dc Electronic Hysteresigraphs

E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)

E1019 Test Methods for Determination of Carbon, Sulfur, Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt Alloys by Various Combustion and Fusion Techniques

Keywords

bars; billet; nickel-iron; permeability; plates; sheets; strips; wires;

ICS Code

ICS Number Code 77.120.40 (Nickel, chromium and their alloys)

DOI: 10.1520/A0753

ASTM International is a member of CrossRef.

ASTM A753