GB/T 32286.1-2015 PDF English
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Soft magnetic alloys - Part 1: Nickel-iron alloys
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GB/T 32286.1-2015: Soft magnetic alloys - Part 1: Nickel-iron alloys---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT32286.1-2015
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.40
H 58
Soft magnetic alloys - Part 1.Nickel-iron alloys
Issued on. DECEMBER 10, 2015
Implemented on. NOVEMBER 01, 2016
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Classification... 6
4 Order content... 6
5 Dimensions and appearance... 7
6 Technical requirements... 10
7 Test methods... 22
8 Inspection rules... 23
9 Packaging, marking and quality certification... 24
Appendix A (Informative) Recommended heat treatment system for samples... 25
Appendix B (Informative) Basic physical parameters and typical mechanical properties
of alloys... 27
Appendix C (Informative) AC magnetic properties of 1J50, 1J79 and 1J85 alloys when
magnetized in different states... 29
Foreword
This Part is Part 1 of GB/T 32286 Soft magnetic alloys.
This Part was drafted in accordance with the rules given in GB/T 1.1-2009.
This Part was proposed by China Iron and Steel Industry Association.
This Part shall be under the jurisdiction of National Technical Committee on Iron and
Steel of Standardization Administration of China (SAC/TC 183).
Drafting organizations of this Part. Dongbei Special Iron & Steel Group Dalian
Precision Alloy Co., Ltd., China Metallurgical Information and Standardization
Institute.
Main drafters of this Part. Xu Xiaoping, Luan Yan, Yan Chengming.
Soft magnetic alloys - Part 1.Nickel-iron alloys
1 Scope
This part of GB/T 32286 specifies the classification, order content, dimensions,
appearance, technical requirements, test methods, inspection rules, packaging, marking
and quality certification for nickel-iron soft magnetic alloy materials.
This Part applies to cold-rolled strips, cold-drawn wires, cold-drawn (rolled) pipes, hot-
rolled (forged) rods and flat bars of higher permeability and higher saturation magnetic
induction intensity nickel-iron alloys 1J46, 1J50, 1J54 and high permeability nickel-
iron alloys 1J76, 1J77, 1J79, 1J80, 1J85, 1J86; cold-rolled sheets of high permeability
nickel-iron alloys 1J79 and 1J85; cold-rolled strips of nickel-iron rectangular magnetic
alloys 1J34, 1J51, 1J52, 1J65, 1J67, 1J83, 1J403; cold-rolled strips of magnetic
temperature compensation nickel-iron alloys 1J30, 1J31, 1J32, 1J33, 1J38; and cold-
rolled strips of permanent permeability nickel-iron alloy 1J66.
This Part does not apply to high hardness, high resistance and high permeability nickel-
iron alloy materials, corrosion-resistant nickel-iron alloys and nickel-iron alloy
materials for magnetic heads (hereinafter referred to as alloy materials).
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 cupper 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 D-
denzoinoxime gravimetric method for the determination of molybdenum content
3 Classification
3.1 Classified into the following five categories by the main characteristics.
3.2 Classified into the following four categories by the nickel content.
4 Order content
The contract for ordering under this Part shall include the following.
5 Dimensions and appearance
5.1 Cold-rolled strips
5.1.1 Dimensions and permissible deviations
5.1.1.1 The dimensions and thickness permissible deviations of cold-rolled strips shall
comply with the provisions of Table 1.Positive and negative deviations may also be
adopted after consultation between the supplier and the buyer and specified in the
contract.
5.1.1.2 The width permissible deviation of cold-rolled strips shall comply with the
requirements of Table 2 and Table 3 in GB/T 14986-2008.
5.1.2 Appearance
The appearance of cold-rolled strips shall comply with the requirements of 5.1.2 in
GB/T 14986-2008.
5.2 Cold-rolled sheets
5.2.1 Dimensions and permissible deviations
5.2.1.1 The range of sizes of cold-rolled sheets. nominal thickness 0.50 mm ~ 2.00 mm;
nominal width 600 mm ~ 1 000 mm; nominal length 1 000 mm ~ 2 000 mm.
5.2.2 Appearance
5.2.2.1 For cold-rolled sheets delivered without heat treatment, the unevenness shall
not exceed 30 mm/m.
5.3 Cold-drawn wires
The dimensions and appearance of cold-drawn wires shall comply with the provisions
of 5.3 in GB/T 14986-2008.For cold-drawn wires with a nominal diameter greater than
6.0 mm ~ 10.0 mm, the permissible diameter deviation is ±0.050 mm.
5.4 Cold drawn (rolled) pipes
The dimensions, appearance and permissible deviation of cold drawn (rolled) pipes
shall be subject to the agreement between the supplier and the buyer.
5.5 Hot rolled (forged) flat bars and rods
5.5.1 Dimensions and permissible deviations
5.5.2 Appearance
The appearance of hot rolled (forged) flat bars and rods shall comply with the
requirements of 5.5.2 in GB/T 14986-2008.
6 Technical requirements
6.1 Designation and chemical composition
The alloy designation and chemical composition shall comply with the provisions of
Table 5.
6.2 Smelting method
Smelt the alloy in a vacuum induction furnace. Other smelting methods that meet the
requirements of this Part may also be used, but this shall be noted in the quality
certification. Special requirements, if any, shall be negotiated between both parties and
indicated in the contract.
6.3 Delivery state
6.3.1 Alloy materials are delivered without heat treatment. The delivery state is shown
in Table 6.
6.4 Magnetic properties
6.4.1 The magnetic properties of alloy samples after heat treatment shall comply with
the provisions of Tables 7 ~ 13.The recommended heat treatment system is shown in
Appendix A.
6.4.2 According to the requirements of the buyer, magnetic temperature stability test
can be carried out, and the indicators shall be determined by negotiation between the
supplier and the buyer.
6.4.3 If the buyer requires delivery in other states (such as soft, polished, peeled, turned,
etc.), the magnetic properties shall be negotiated by the supplier and the buyer and
specified in the contract. If not specified, the supplier shall provide the actual measured
data.
6.5 Other properties
The basic physical parameters and typical mechanical properties of the alloy are shown
in Appendix B.
6.6 Surface quality
6.7 Special requirements.
6.7.1 Based on the buyer's requirements and as specified in the contract, low-power,
ultrasonic, hairline, non-metallic inclusion, mechanical properties and other tests can
be provided.
7 Test methods
7.1 The inspection items and test methods for alloy materials are shown in Table 14.
Table 14 – Inspection items, sampling locations, sampling quantities and test
methods for alloy materials
7.2 The AC stable value α~, AC/DC stable value α≃ and temperature stable value αT of
the permanent permeability 1J66 alloy are measured using an AC bridge. The
measurement method is as follows.
8 Inspection rules
8.1 Inspection and acceptance
The inspection and acceptance of alloy materials shall be carried out by the supplier's
quality and technical supervision department.
8.2 Batch rules
Alloy materials shall be submitted for inspection and acceptance in batches. Each batch
shall consist of alloy materials of the same designation, same furnace number, same
specification and same delivery state.
8.3 Sampling portion and sampling quantity
The sampling portion and sampling quantity shall be in accordance with the provisions
of Table 14.
8.4 Re-inspection and determination rules
8.4.1 When the chemical composition of the alloy material is unqualified, it is allowed
to re-sample and re-test the unqualified items. If it is still unqualified, the alloy of the
furnace shall be judged as unqualified.
9 Packaging, marking and quality certification
The packaging, marking and quality certification of alloy materials shall comply with
the relevant provisions of YB/T 5242.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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