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Soft magnetic alloys - Part 2: Nickel-iron alloys
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Basic data | Standard ID | GB/T 14986.2-2025 (GB/T14986.2-2025) | | Description (Translated English) | Soft magnetic alloys - Part 2: Nickel-iron alloys | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H58 | | Classification of International Standard | 77.140.40 | | Word Count Estimation | 42,464 | | Date of Issue | 2025-08-29 | | Date of Implementation | 2026-03-01 | | Older Standard (superseded by this standard) | GB/T 32286.1-2015, GB/T 14987-2016 | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration | GB/T 14986.2-2025: Soft magnetic alloys - Part 2: 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/GBT14986.2-2025
ICS 77.140.40
CCSH58
National Standard of the People's Republic of China
Replaces GB/T 32286.1-2015, GB/T 14987-2016
Soft magnetic alloys Part 2.Iron-nickel alloys
Softmagneticaloys-Part 2.Nickel-ironaloys
Released on August 29, 2025
Implementation on March 1, 2026
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Categories 2
5 Order Content 2
6 Manufacturing Process 2
6.1 Smelting Method 2
6.2 Delivery Status 2
7 Technical Requirements 2
7.1 Brand and chemical composition 2
7.2 Magnetic Properties 5
7.3 Resistivity 14
7.4 Vickers hardness 14
7.5 Surface Quality 14
7.6 Dimensions and Appearance 14
7.7 Special requirements 17
8 Test methods 17
9 Inspection Rules 18
9.1 Inspection and Acceptance 18
9.2 Batch Rules 18
9.3 Sampling quantity and sampling location 18
9.4 Retest and Judgment Rules 18
9.5 Values rounded to 18
10 Packaging, labeling, storage and quality certificate 18
Appendix A (Informative) Recommended Sample Heat Treatment System 19
Appendix B (Informative) AC Magnetic Properties of 1J350, 1J479, and 1J485 Alloys at Different Magnetization States 21
Appendix C (Informative) Basic physical parameters and typical mechanical properties of alloys 33
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document is Part 2 of GB/T 14986 "Soft Magnetic Alloys". GB/T 14986 has been published in the following parts.
--- Part 1.General requirements;
--- Part 2.Iron-nickel alloys;
--- Part 3.Iron-cobalt alloys;
--- Part 4.Iron-chromium alloys;
--- Part 5.Iron and aluminum alloys.
This document replaces GB/T 32286.1-2015 "Soft magnetic alloys Part 1.Iron-nickel alloys" and GB/T 14987-2016 "High hardness
High resistance iron-nickel soft magnetic alloy cold-rolled strip". This document is based on GB/T 32286.1-2015 and integrates GB/T 14987-2016.
Compared with GB/T 32286.1-2015, in addition to structural adjustments and editorial changes, the main technical changes are as follows.
a) The scope of application of the document has been changed (see Chapter 1, Chapter 1 of the.2015 edition);
b) Added the term "peak permeability" (see 3.1);
c) The requirements for smelting methods have been changed (see 6.1, 6.2 of the.2015 edition);
d) Added corrosion-resistant nickel-iron alloy 1J336 and higher permeability and higher saturation magnetic induction intensity nickel-iron alloy 1J348 (see Table 1);
e) The sulfur content requirements have been changed (see Table 1, Table 5 of the.2015 edition);
f) The requirements for allowable deviation of chemical composition have been changed (see 7.1.2, 6.1 of the.2015 edition);
g) The upper limit of the width of cold-rolled iron-nickel alloy strips with a thickness greater than 0.04 mm, except for high-hardness and high-resistance iron-nickel alloys, has been changed (see
7.6.1.1.2, 5.1.1.1 of the.2015 edition);
h) Added provisions for numerical rounding (see 9.5).
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by the China Iron and Steel Association.
This document is under the jurisdiction of the National Technical Committee on Steel Standardization (SAC/TC183).
This document was drafted by. Beijing Beiye Functional Materials Co., Ltd., Northeast Special Steel Group Co., Ltd., Antai Technology Co., Ltd.
Company, Jiangsu Hongyun Precision Industry Co., Ltd., Haiyan Zhongda Metal Electronic Materials Co., Ltd., Metallurgical Industry Information Standards Research Institute, Iron and Steel Research Institute
Research Institute Co., Ltd., Xi'an Steel Research Institute Functional Materials Co., Ltd., Panzhihua Iron and Steel Group Jiangyou Great Wall Special Steel Co., Ltd., Fushun Special Steel Co., Ltd.
Co., Ltd., Zhejiang Qingshan Iron and Steel Co., Ltd., and Chengdu Kaitian Electronics Co., Ltd.
The main drafters of this document are. Xu Mingzhou, Xue Jianing, Wang Lianchao, Li Jun, Ju Xiang, Zhang Yunheng, Zhang Jinglin, Li Bo, Xu Ding, Pan Yanfeng,
Ji Dengping, Yan Chengming, Yang Fan, Li Chongyang, Wang Shu, Guo Xiaodong, Zhu Yahui, Xu Xiaofeng, Wang Lin, Yu Yipeng, Liu Jie, Fang Yi, Guan Yulong, and Wang Beibei.
The previous versions of the documents replaced by this document are as follows.
--- GB/T 32286.1, first issued in 1988 as GB n198-1988 and first revised in.2015 as GB/T 32286.1-2015;
---GB/T 14987, first issued in 1982 as GB n161-1982, first revised in.1994 as GB/T 14987-
1994, second revised in.2016.
introduction
Soft magnetic alloys are a type of alloy with high magnetic permeability and low coercivity in weak magnetic fields. They are widely used in radio electronics industry, precision
In instruments, remote control and automatic control systems, it is mainly divided into iron-nickel soft magnetic alloys, iron-cobalt soft magnetic alloys, iron-aluminum and other soft magnetic alloys
It is a very important material in the modern industrial field.
GB/T 14986 "Soft Magnetic Alloys" aims to standardize the production, procurement and application of soft magnetic alloys and is intended to consist of four parts.
--- Part 1.General requirements. The purpose is to specify requirements that are common to other parts so that they can be referenced in other parts.
--- Part 2.Iron-nickel alloys. The purpose is to specify the technical requirements of iron-nickel soft magnetic alloys.
--- Part 3.Iron-cobalt alloys. The purpose is to specify the technical requirements of iron-cobalt soft magnetic alloys.
--- Part 4.Other alloys. The purpose is to specify the technical specifications of other soft magnetic alloys except iron-nickel and iron-cobalt soft magnetic alloys, such as iron and aluminum.
Require.
Soft magnetic alloys Part 2.Iron-nickel alloys
1 Scope
This document provides the classification of iron-nickel soft magnetic alloy materials, and specifies the order content, manufacturing process, technical requirements, inspection rules, packaging, labeling, etc.
The corresponding test methods are described in the label, storage and quality certificate.
This document applies to the production, procurement and application of the following iron-nickel soft magnetic alloy materials (hereinafter referred to as alloy materials).
--- Corrosion-resistant iron-nickel alloy 1J336 cold-rolled strip, hot-rolled (forged) bar and plate;
---Higher magnetic permeability and higher saturation magnetic induction strength iron-nickel alloy 1J346, 1J348, 1J350, 1J354 cold rolled strip, cold drawn wire, cold
drawn (rolled) tubes, hot-rolled (forged) bars and plates;
---High magnetic permeability iron-nickel alloy 1J476, 1J477, 1J479, 1J480, 1J485, 1J486 cold-rolled strip, cold-drawn wire, cold-drawn (rolled) tube
Hot-rolled (forged) bars and plates, 1J476, 1J479, 1J485 cold-rolled plates;
---Cold-rolled strips of nickel alloys 1J334, 1J350J, 1J352, 1J465, 1J467, 1J483 and 1J340;
---Cold-rolled strip of magnetic temperature-compensated iron-nickel alloys 1J330, 1J331, 1J332, 1J333, and 1J338;
---Cold-rolled strip of constant permeability iron-nickel alloy 1J466;
---Cold rolled strip of high hardness and high resistance iron-nickel alloys 1J487 and 1J488.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 223 (all parts) Chemical analysis methods for steel and alloys
GB/T 3658 Measurement of magnetic properties of soft magnetic metal materials and powder metallurgy materials in the frequency range of 20 Hz to 100 kHz using annular specimens
method
GB/T 4340.1 Metallic materials Vickers hardness test Part 1.Test method
GB/T 6146 Test method for resistivity of precision resistance alloys
GB/T 8170 Rules for rounding off values and expression and determination of limit values
GB/T 13012 Measurement method of DC magnetic properties of soft magnetic materials
GB/T 13297 General provisions for packaging, marking and quality certificates of precision alloys
GB/T 14986.1-2025 Soft magnetic alloys Part 1.General requirements
GB/T 20066 Sampling and preparation of samples for determination of chemical composition of steel and iron
GB/T 20123 Determination of total carbon and sulfur content of steel - Infrared absorption method after combustion in a high-frequency induction furnace (conventional method)
GB/T 36164 High alloy steel - Determination of multi-element content - X-ray fluorescence spectrometry (conventional method)
GB/T 38939 Nickel-based alloys - Determination of multi-element content - Spark discharge atomic emission spectrometry (routine method)
3 Terms and Definitions
The terms and definitions defined in GB/T 14986.1-2025 and the following apply to this document.
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GB/T 14986.2-2025: Soft magnetic alloys - Part 2: Nickel-iron alloys
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