GB/T 14986.2-2025 Soft magnetic alloys—Part 2：Nickel-iron alloys English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS 77.140.40
CCS H 58
National Standard of the People's Republic of China
GB/T 14986.2-2025
Replaces GB/T 14987-2016, GB/T 32286.1-2015
Soft Magnetic Alloys-Part 2: Nickel-iron alloys
Issue date: 2025-08-29 Implementation date: 2026-03-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
5 Ordering information
6 Manufacturing process
6.1 Melting method
6.2 Delivery condition
7 Technical requirements
7.1 Alloy designations and chemical composition
7.2 Magnetic properties
7.3 Electrical resistivity
7.4 Vickers hardness
7.5 Surface quality
7.6 Dimensions and shape
7.7 Special requirements
8 Test methods
9 Inspection rules
9.1 Inspection and acceptance
9.2 Batch rules
9.3 Sampling quantity and location
9.4 Re-inspection and judgment rules
9.5 Numerical rounding
10 Packaging, marking, storage, and quality certificate
Appendix A (Informative) Recommended heat treatment system for samples
Appendix B (Informative) AC magnetic properties of 1J350, 1J479, and 1J485 alloys under different magnetization conditions
Appendix C (Informative) Basic physical parameters and typical mechanical properties of alloys
Soft magnetic alloys-Part 2: Nickel-iron alloys
1 Scope
This document provides the classification of nickel-iron soft magnetic alloy materials, specifies ordering information, manufacturing processes, technical requirements, inspection rules, packaging, marking, storage, and quality certificates, and describes the corresponding test methods.
This document applies to the production, procurement, and application of the following nickel-iron soft magnetic alloy materials (referred to as alloy materials):
- Corrosion-resistant nickel-iron alloy 1J336 cold-rolled strip, hot-rolled (forged) bar, and plate;
- Nickel-iron alloys with relatively high permeability and relatively high saturation magnetic induction strength 1J346, 1J348, 1J350, 1J354 cold-rolled strip, cold-drawn wire, cold-drawn (rolled) tube, hot-rolled (forged) bar, and plate;
- High-permeability nickel-iron alloys 1J476, 1J477, 1J479, 1J480, 1J485, 1J486 cold-rolled strip, cold-drawn wire, cold-drawn (rolled) tube, hot-rolled (forged) bar, and plate, 1J476, 1J479, 1J485 cold-rolled plate;
- Rectangular magnetic nickel-iron alloys 1J334, 1J350J, 1J352, 1J465, 1J467, 1J483, 1J340 cold-rolled strip;
- Magnetic temperature compensation nickel-iron alloys 1J330, 1J331, 1J332, 1J333, 1J338 cold-rolled strip;
- Constant permeability nickel-iron alloy 1J466 cold-rolled strip;
- High hardness and high resistivity nickel-iron alloys 1J487, 1J488 cold-rolled strip.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute essential provisions of this document. For dated references, only the edition cited applies; for undated references, the latest edition (including any amendments) applies.
GB/T 223 (All parts) Chemical analysis methods for iron and steel
GB/T 3658 Magnetic properties measurement of soft magnetic metal materials and powder metallurgy materials using ring test specimens in the frequency range of 20 Hz to 100 kHz
GB/T 4340.1 Metallic materials-Vickers hardness test-Part 1: Test method
GB/T 6146 Test method for electrical resistivity of precision resistance alloys
GB/T 8170 Rules for rounding off numerical values and representation and judgment of limiting values
GB/T 13012 General specification for packaging, marking, and quality certificate of precision alloys
GB/T 14986.1-2025 Soft magnetic alloys-Part 1: General requirements
GB/T 20066 Sampling and sample preparation for determination of chemical composition of steel and iron
GB/T 20123 Iron and steel-Determination of total carbon and sulfur content-Infrared absorption method after combustion in a high-frequency 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 (conventional method)
3 Terms and definitions
Terms and definitions defined in GB/T 14986.1-2025 and the following apply to this document.
3.1
Peak permeability
μp
The ratio of the peak flux density to the peak external magnetic field strength.
4 Classification
The classification of nickel-iron alloys in GB/T 14986.1-2025 applies to this document.
5 Ordering information
Ordering information shall comply with the provisions of GB/T 14986.1-2025.
6 Manufacturing Process
6.1 Melting Method
Unless otherwise specified in the contract or order, the alloy shall preferably be produced by vacuum induction melting.
6.2 Delivery Condition
Alloy materials shall be delivered in the as-rolled condition without heat treatment. The delivery types and conditions are specified in Appendix A of GB/T 14986.1-2025.
6.2.2 Upon request by the purchaser and as indicated in the contract, alloy materials may also be delivered in soft state, polished, peeled, or turned conditions.
7 Technical Requirements
7.1 Grade and Chemical Composition
7.1.1 The grade and chemical composition (melting analysis) of the alloy shall comply with Table 1.
7.1.2 When the magnetic properties of the alloy meet the requirements, deviations from the chemical composition range specified in Table 1 are permitted.
7.2 Magnetic Properties
7.2.1 The magnetic properties of alloy materials after heat treatment shall comply with Tables 2–10. The recommended heat treatment system is provided in Appendix A.
7.2.2 For cold-rolled strip materials with a thickness ≤ 0.01 mm, magnetic properties shall be provided as measured data only and shall not serve as a basis for judgment.
7.2.3 AC magnetic properties of 1J350, 1J479, and 1J485 alloys under different magnetization conditions are provided in Appendix B.
Table 2 DC Magnetic Properties of Corrosion-Resistant Iron-Nickel Alloy Materials
7.3 Electrical Resistivity
Upon request by the purchaser and as indicated in the contract, the electrical resistivity of high-hardness high-resistance iron-nickel alloy strips may be measured.
7.4 Vickers Hardness
Upon mutual agreement between supplier and purchaser, the Vickers hardness of high-hardness high-resistance iron-nickel cold-rolled strips may be measured.
Table 11 Hardness of High-Hardness High-Resistance Iron-Nickel Alloy Strips
Standard
GB/T 14986.2-2025 Soft magnetic alloys—Part 2：Nickel-iron alloys (English Version)
GB/T 14986.2-2025 Soft magnetic alloys—Part 2：Nickel-iron alloys English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS 77.140.40
CCS H 58
National Standard of the People's Republic of China
GB/T 14986.2-2025
Replaces GB/T 14987-2016, GB/T 32286.1-2015
Soft Magnetic Alloys-Part 2: Nickel-iron alloys
Issue date: 2025-08-29 Implementation date: 2026-03-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
5 Ordering information
6 Manufacturing process
6.1 Melting method
6.2 Delivery condition
7 Technical requirements
7.1 Alloy designations and chemical composition
7.2 Magnetic properties
7.3 Electrical resistivity
7.4 Vickers hardness
7.5 Surface quality
7.6 Dimensions and shape
7.7 Special requirements
8 Test methods
9 Inspection rules
9.1 Inspection and acceptance
9.2 Batch rules
9.3 Sampling quantity and location
9.4 Re-inspection and judgment rules
9.5 Numerical rounding
10 Packaging, marking, storage, and quality certificate
Appendix A (Informative) Recommended heat treatment system for samples
Appendix B (Informative) AC magnetic properties of 1J350, 1J479, and 1J485 alloys under different magnetization conditions
Appendix C (Informative) Basic physical parameters and typical mechanical properties of alloys
Soft magnetic alloys-Part 2: Nickel-iron alloys
1 Scope
This document provides the classification of nickel-iron soft magnetic alloy materials, specifies ordering information, manufacturing processes, technical requirements, inspection rules, packaging, marking, storage, and quality certificates, and describes the corresponding test methods.
This document applies to the production, procurement, and application of the following nickel-iron soft magnetic alloy materials (referred to as alloy materials):
- Corrosion-resistant nickel-iron alloy 1J336 cold-rolled strip, hot-rolled (forged) bar, and plate;
- Nickel-iron alloys with relatively high permeability and relatively high saturation magnetic induction strength 1J346, 1J348, 1J350, 1J354 cold-rolled strip, cold-drawn wire, cold-drawn (rolled) tube, hot-rolled (forged) bar, and plate;
- High-permeability nickel-iron alloys 1J476, 1J477, 1J479, 1J480, 1J485, 1J486 cold-rolled strip, cold-drawn wire, cold-drawn (rolled) tube, hot-rolled (forged) bar, and plate, 1J476, 1J479, 1J485 cold-rolled plate;
- Rectangular magnetic nickel-iron alloys 1J334, 1J350J, 1J352, 1J465, 1J467, 1J483, 1J340 cold-rolled strip;
- Magnetic temperature compensation nickel-iron alloys 1J330, 1J331, 1J332, 1J333, 1J338 cold-rolled strip;
- Constant permeability nickel-iron alloy 1J466 cold-rolled strip;
- High hardness and high resistivity nickel-iron alloys 1J487, 1J488 cold-rolled strip.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute essential provisions of this document. For dated references, only the edition cited applies; for undated references, the latest edition (including any amendments) applies.
GB/T 223 (All parts) Chemical analysis methods for iron and steel
GB/T 3658 Magnetic properties measurement of soft magnetic metal materials and powder metallurgy materials using ring test specimens in the frequency range of 20 Hz to 100 kHz
GB/T 4340.1 Metallic materials-Vickers hardness test-Part 1: Test method
GB/T 6146 Test method for electrical resistivity of precision resistance alloys
GB/T 8170 Rules for rounding off numerical values and representation and judgment of limiting values
GB/T 13012 General specification for packaging, marking, and quality certificate of precision alloys
GB/T 14986.1-2025 Soft magnetic alloys-Part 1: General requirements
GB/T 20066 Sampling and sample preparation for determination of chemical composition of steel and iron
GB/T 20123 Iron and steel-Determination of total carbon and sulfur content-Infrared absorption method after combustion in a high-frequency 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 (conventional method)
3 Terms and definitions
Terms and definitions defined in GB/T 14986.1-2025 and the following apply to this document.
3.1
Peak permeability
μp
The ratio of the peak flux density to the peak external magnetic field strength.
4 Classification
The classification of nickel-iron alloys in GB/T 14986.1-2025 applies to this document.
5 Ordering information
Ordering information shall comply with the provisions of GB/T 14986.1-2025.
6 Manufacturing Process
6.1 Melting Method
Unless otherwise specified in the contract or order, the alloy shall preferably be produced by vacuum induction melting.
6.2 Delivery Condition
Alloy materials shall be delivered in the as-rolled condition without heat treatment. The delivery types and conditions are specified in Appendix A of GB/T 14986.1-2025.
6.2.2 Upon request by the purchaser and as indicated in the contract, alloy materials may also be delivered in soft state, polished, peeled, or turned conditions.
7 Technical Requirements
7.1 Grade and Chemical Composition
7.1.1 The grade and chemical composition (melting analysis) of the alloy shall comply with Table 1.
7.1.2 When the magnetic properties of the alloy meet the requirements, deviations from the chemical composition range specified in Table 1 are permitted.
7.2 Magnetic Properties
7.2.1 The magnetic properties of alloy materials after heat treatment shall comply with Tables 2–10. The recommended heat treatment system is provided in Appendix A.
7.2.2 For cold-rolled strip materials with a thickness ≤ 0.01 mm, magnetic properties shall be provided as measured data only and shall not serve as a basis for judgment.
7.2.3 AC magnetic properties of 1J350, 1J479, and 1J485 alloys under different magnetization conditions are provided in Appendix B.
Table 2 DC Magnetic Properties of Corrosion-Resistant Iron-Nickel Alloy Materials
7.3 Electrical Resistivity
Upon request by the purchaser and as indicated in the contract, the electrical resistivity of high-hardness high-resistance iron-nickel alloy strips may be measured.
7.4 Vickers Hardness
Upon mutual agreement between supplier and purchaser, the Vickers hardness of high-hardness high-resistance iron-nickel cold-rolled strips may be measured.
Table 11 Hardness of High-Hardness High-Resistance Iron-Nickel Alloy Strips
