GB/T 14986.2-2025 Soft magnetic alloys—Part 2：Nickel-iron alloys English, Anglais, Englisch, Inglés, えいご
1 Scope
This document specifies the classification of nickel-iron soft magnetic alloy products, defines the order information, manufacturing process, technical requirements, inspection rules, packaging, marking, storage and quality certificate, and describes the corresponding test methods.
This document is applicable to the production, procurement and application of the following nickel-iron soft magnetic alloy products (referred to as alloy products):
——cold-rolled strips, hot-rolled (forged) bars and plates of corrosion-resistant nickel-iron alloy 1J336;
——cold-rolled strips, cold-drawn wires, cold-drawn (rolled) tubes, hot-rolled (forged) bars and plates of nickel-iron alloys with higher permeability and higher saturation magnetic induction, 1J346, 1J348, 1J350 and 1J354;
——cold-rolled strips, cold-drawn wires, cold-drawn (rolled) tubes, hot-rolled (forged) bars and plates of high permeability nickel-iron alloys 1J476, 1J477, 1J479, 1J480, 1J485 and 1J486; cold-rolled plates of 1J476, 1J479 and 1J485;
——cold-rolled strips of rectangular magnetic nickel-iron alloys 1J334, 1J350J, 1J352, 1J465, 1J467, 1J483 and 1J340;
——cold-rolled strips of magnetic compensate nickel-iron alloys depending on temperature variation, 1J330, 1J331, 1J332, 1J333 and 1J338;
——cold-rolled strips of permanent permeability nickel-iron alloy 1J466;
——cold-rolled strips of high hardness and high resistance nickel-iron alloys 1J487 and 1J488.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions 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 223 (all parts) Methods for chemical analysis of iron, steel and alloy
GB/T 3658 Methods of measurement of the magnetic properties of magnetically soft metallic and powder materials at frequencies in the range 20Hz to 100kHz by the use of ring specimens
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 of rounding off for numerical values & expression and judgment of limiting values
GB/T 13012 Methods of measurement of d.c. magnetic properties of magnetically soft materials
GB/T 13297 General rules of packaging, marking and quality certification for precision alloys
GB/T 14986.1-2025 Soft magnetic alloys - Part 1: General requirements
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 36164 High alloy steel - Determination of multi-element contents - X-ray fluorescence spectrometry (routine method)
GB/T 38939 Nickel-based alloy - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 14986.1-2025 and the following apply.
3.1
peak permeability
μp
ratio of the peak magnetic flux density to the peak external magnetic field intensity
4 Classification
The classification of nickel-iron alloys in GB/T 14986.1-2025 is applicable to this document.
5 Order information
The order information shall meet the requirements of GB/T 14986.1-2025.
6 Manufacturing processes
6.1 Smelting method
Unless otherwise specified in the contract or order, alloys should be smelted by vacuum induction smelting.
6.2 Delivery condition
6.2.1 Alloy products are delivered without heat treatment. See GB/T 14986.1-2025, Annex A for the delivery type and condition.
6.2.2 As required by the purchaser and indicated in the contract, alloy products may also be delivered in soft, ground, peeled, turned or other similar conditions.
7 Technical requirements
7.1 Designation and chemical composition
7.1.1 The designation and chemical composition (melting analysis) of alloys shall meet those specified in Table 1.
7.1.2 When the magnetic properties of alloys meet the requirements, the chemical composition is allowed to deviate from the specified range in Table 1.
Contents
Foreword i
Introduction iii
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
5 Order information
6 Manufacturing processes
6.1 Smelting method
6.2 Delivery condition
7 Technical requirements
7.1 Designation and chemical composition
7.2 Magnetic properties
7.3 Resistivity
7.4 Vickers hardness
7.5 Surface quality
7.6 Dimension and shape
7.7 Special requirements
8 Test methods
9 Inspection rules
9.1 Inspection and acceptance
9.2 Batching rules
9.3 Sampling quantity and sampling location
9.4 Re-inspection and judgment rules
9.5 Rounding off of numerical values
10 Packaging, marking, storage and quality certificate
Annex A (Informative) Recommended heat treatment systems for specimens
Annex B (Informative) AC magnetic properties of 1J350, 1J479 and 1J485 alloys magnetized under different conditions
Annex C (Informative) Basic physical parameters and typical mechanical properties of alloys
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
1 Scope
This document specifies the classification of nickel-iron soft magnetic alloy products, defines the order information, manufacturing process, technical requirements, inspection rules, packaging, marking, storage and quality certificate, and describes the corresponding test methods.
This document is applicable to the production, procurement and application of the following nickel-iron soft magnetic alloy products (referred to as alloy products):
——cold-rolled strips, hot-rolled (forged) bars and plates of corrosion-resistant nickel-iron alloy 1J336;
——cold-rolled strips, cold-drawn wires, cold-drawn (rolled) tubes, hot-rolled (forged) bars and plates of nickel-iron alloys with higher permeability and higher saturation magnetic induction, 1J346, 1J348, 1J350 and 1J354;
——cold-rolled strips, cold-drawn wires, cold-drawn (rolled) tubes, hot-rolled (forged) bars and plates of high permeability nickel-iron alloys 1J476, 1J477, 1J479, 1J480, 1J485 and 1J486; cold-rolled plates of 1J476, 1J479 and 1J485;
——cold-rolled strips of rectangular magnetic nickel-iron alloys 1J334, 1J350J, 1J352, 1J465, 1J467, 1J483 and 1J340;
——cold-rolled strips of magnetic compensate nickel-iron alloys depending on temperature variation, 1J330, 1J331, 1J332, 1J333 and 1J338;
——cold-rolled strips of permanent permeability nickel-iron alloy 1J466;
——cold-rolled strips of high hardness and high resistance nickel-iron alloys 1J487 and 1J488.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions 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 223 (all parts) Methods for chemical analysis of iron, steel and alloy
GB/T 3658 Methods of measurement of the magnetic properties of magnetically soft metallic and powder materials at frequencies in the range 20Hz to 100kHz by the use of ring specimens
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 of rounding off for numerical values & expression and judgment of limiting values
GB/T 13012 Methods of measurement of d.c. magnetic properties of magnetically soft materials
GB/T 13297 General rules of packaging, marking and quality certification for precision alloys
GB/T 14986.1-2025 Soft magnetic alloys - Part 1: General requirements
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 36164 High alloy steel - Determination of multi-element contents - X-ray fluorescence spectrometry (routine method)
GB/T 38939 Nickel-based alloy - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 14986.1-2025 and the following apply.
3.1
peak permeability
μp
ratio of the peak magnetic flux density to the peak external magnetic field intensity
4 Classification
The classification of nickel-iron alloys in GB/T 14986.1-2025 is applicable to this document.
5 Order information
The order information shall meet the requirements of GB/T 14986.1-2025.
6 Manufacturing processes
6.1 Smelting method
Unless otherwise specified in the contract or order, alloys should be smelted by vacuum induction smelting.
6.2 Delivery condition
6.2.1 Alloy products are delivered without heat treatment. See GB/T 14986.1-2025, Annex A for the delivery type and condition.
6.2.2 As required by the purchaser and indicated in the contract, alloy products may also be delivered in soft, ground, peeled, turned or other similar conditions.
7 Technical requirements
7.1 Designation and chemical composition
7.1.1 The designation and chemical composition (melting analysis) of alloys shall meet those specified in Table 1.
7.1.2 When the magnetic properties of alloys meet the requirements, the chemical composition is allowed to deviate from the specified range in Table 1.
Contents of GB/T 14986.2-2025
Contents
Foreword i
Introduction iii
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
5 Order information
6 Manufacturing processes
6.1 Smelting method
6.2 Delivery condition
7 Technical requirements
7.1 Designation and chemical composition
7.2 Magnetic properties
7.3 Resistivity
7.4 Vickers hardness
7.5 Surface quality
7.6 Dimension and shape
7.7 Special requirements
8 Test methods
9 Inspection rules
9.1 Inspection and acceptance
9.2 Batching rules
9.3 Sampling quantity and sampling location
9.4 Re-inspection and judgment rules
9.5 Rounding off of numerical values
10 Packaging, marking, storage and quality certificate
Annex A (Informative) Recommended heat treatment systems for specimens
Annex B (Informative) AC magnetic properties of 1J350, 1J479 and 1J485 alloys magnetized under different conditions
Annex C (Informative) Basic physical parameters and typical mechanical properties of alloys
