GB/T 32286.1-2015 Soft magnetic alloys - Part 1: Nickel-iron alloys
1 Scope
This part of GB/T 32286 specifies the classification, order information, dimensions and shapes, technical requirements, test methods, inspection rules, packaging, marking and quality certification of iron-nickel soft magnetic alloy products.
This part is applicable to cold-rolled strips, cold-drawn wires, cold-drawn (rolled) pipes, and hot-rolled (forged) bars and flat billets made of iron-nickel alloys with higher permeability and higher saturation magnetic induction intensity (1J46, 1J50 and 1J54) and high permeability iron-nickel alloys (1J76, 1J77, 1J79, 1J80, 1J85 and 1J86); cold-rolled sheets made of high permeability iron-nickel alloys (1J79 and 1J85); cold-rolled strips made of iron-nickel rectangular magnetic alloys (1J34, 1J51, 1J52, 1J65, 1J67, 1J83 and 1J403); cold-rolled strips made of magnetic compensate iron-nickel alloys depending on temperature variation (1J30, 1J31, 1J32, 1J33 and 1J38); and cold-rolled strips made of permanent permeability iron-nickel alloys (1J66).
This part is not applicable to high hardness, high resistivity and high permeability iron-nickel alloy products, corrosion-resistant iron-nickel alloy products, and iron-nickel alloy products for magnetic heads (hereinafter referred to as "alloy products").
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 222-2006 Permissible tolerances for chemical composition of steel products
GB/T 223.8 Methods for chemical analysis of iron, steel and alloy - The sodium fluoride separation-EDTA titration method for the determination of aluminium content
GB/T 223.11 Iron, steel and alloy - Determination of chromium content - Visual titration or potentiometric titration method
GB/T 223.18 Methods for chemical analysis of iron, steel and alloy - The sodium thiosulfate separation iodimetric method for the determination of copper content
GB/T 223.20 Methods for chemical analysis of iron, steel and alloy - The potentiometric titration method for the determination of cobalt content
GB/T 223.25 Methods for chemical analysis of iron, steel and alloy - The dimethylglyoxime gravimetric method for the determination of nickel content
GB/T 223.28 Methods for chemical analysis of iron, steel and alloy - The α-benzoinoxime gravimetric method for the determination of molybdenum content
GB/T 223.59 Iron, steel and alloy - Determination of phosphorus content - Bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometric method
GB/T 223.60 Methods for chemical analysis of iron, steel and alloy - The perchloric acid dehydration gravimetric method for the determination of silicon content
GB/T 223.63 Methods for chemical analysis of iron, steel and alloy - The sodium (potassium) periodate photometric method for the determination of manganese content
GB/T 223.79 Iron and steel - Determination of multi-element contents - X-ray fluorescence spectrometry (Routine method)
GB/T 223.85 Steel and iron - Determination of sulfur content - Infrared absorption method after combustion in an induction furnace
GB/T 223.86 Steel and iron - Determination of total carbon content - Infrared absorption method after combustion in an induction furnace
GB/T 3658 Methods of measurement of a.c. magnetic properties of magnetically soft materials
GB/T 13012 Methods of measurement of d.c. magnetic properties of magnetically soft materials
GB/T 14986-2008 High saturation magnetic induction, magnetic compensate alloys depending on temperature variation, corrosion-resisting, iron-aluminium, permanent permeability, soft magneticalloys
GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition
GB/T 20123 Steel and iron - Determination of total carbon and sulfur content - Infrared absorption method after combustion in an induction furnace (routine method)
GB/T 20125 Low-alloy steel - Determination of multi-element contents - Inductively coupled plasma atomic emission spectrometric method
YB/T 5242 General rules of packaging, marking and quality certification for precision alloys
3 Classification
3.1 The iron-nickel soft magnetic alloys are classified into the following five categories according to their main characteristics:
a) Iron-nickel alloys with higher permeability and higher saturation magnetic induction intensity;
b) High permeability iron-nickel alloys;
c) Rectangular magnetic iron-nickel alloys;
d) Magnetic compensate iron-nickel alloys depending on temperature variation;
e) Permanent permeability iron-nickel alloys.
3.2 The iron-nickel soft magnetic alloys are classified into the following four categories according to their nickel content:
a) E1: Iron-nickel alloys with a nickel content of 72%~83%;
b) E2: Iron-nickel alloys with a nickel content of 54%~68%;
c) E3: Iron-nickel alloys with a nickel content of 45%~51%;
d) E4: Iron-nickel alloys with a nickel content of 30%~40%.
4 Order information
Order contracts made based on this part shall cover the following items:
a) Product designation;
b) Serial number of this part;
c) Specifications;
d) Weight (or quantity);
Foreword II
1 Scope
2 Normative references
3 Classification
4 Order information
5 Dimensions and shapes
5.1 Cold-rolled strips
5.2 Cold-rolled sheets
5.3 Cold-drawn wires
5.4 Cold-drawn (rolled) pipes
5.5 Hot-rolled (forged) flat billets and bars
6 Technical requirements
6.1 Designations and chemical compositions
6.2 Smelting method
6.3 Delivery state
6.4 Magnetic properties
6.5 Other properties
6.6 Surface quality
6.7 Special requirements
7 Test methods
8 Inspection rules
8.1 Inspection and acceptance
8.2 Batching rules
8.3 Sampling positions and sampling sizes
8.4 Re-inspection and judgment rules
9 Packaging, marking and quality certification
Annex A (Informative) Recommended heat treatment systems for samples
Annex B (Informative) Basic physical parameters and typical mechanical properties of alloys
Annex C (Informative) a.c. magnetic properties of 1J50, 1J79 and 1J85 alloys magnetized in different states
