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GB/T 14986.3-2018 English PDF (GBT14986.3-2018)

GB/T 14986.3-2018 English PDF (GBT14986.3-2018)

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GB/T 14986.3-2018: Soft magnetic alloys -- Part 3: Iron-cobalt alloys
This Part in GB/T 14986 specifies the terms, definitions, classification, content of order, dimension, appearance, technical requirements, test methods, inspection rules, packaging, mark and quality certificate of high saturation magnetic induction, high magnetostriction coefficient 1J21, 1J22 and 1J27 iron-cobalt soft magnetic alloy. This Part is applicable to cold-rolled strip, cold-drawn wire, hot-rolled flat material and hot-rolled (wrought) bar (hereinafter referred to as alloys) of 1J21, 1J22 and 1J27 iron-cobalt alloy.
GB/T 14986.3-2018
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.40
H 58
Partially replacing GB/T 14986-2008
Soft Magnetic Alloys - Part 3. Iron-cobalt Alloys
ISSUED ON. JUNE 7, 2018
IMPLEMENTED ON. MARCH 1, 2019
Issued by. State Administration for Market Regulation of the People’s
Republic of China;
Standardization Administration Committee of the People’s
Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 6
4 Classification ... 6
5 Content of Order ... 6
6 Dimension and Appearance ... 7
7 Technical Requirements ... 8
8 Test Methods ... 11
9 Inspection Rules ... 11
10 Packaging, Mark and Quality Certificate ... 12
Appendix A (informative appendix)... 13
Appendix B (informative appendix) ... 14
Foreword
GB/T 14986 Soft Magnetic Alloys is divided into five parts as follows.
-- Part 1. general requirements;
-- Part 2. iron-nickel alloys;
-- Part 3. iron-cobalt alloys;
-- Part 4. iron-chrome alloys;
-- Part 5. iron-aluminum alloy.
This is the third part of GB/T 14986.
This Part is drafted in accordance with stipulations in GB/T 1.1-2009.
This Part is drafted as a replacement of iron-cobalt alloys part in GB/T 14986-2008 High Saturation Magnetic Induction Magnetic Compensate Alloys Depending on Temperature Variation Corrosion-resisting Iron-aluminum Permanent Permeability Soft Magnetic Alloys.
In comparison with GB/T 14986-2008, there are several main technical changes as follows.
-- Two trademarks 1J21 and 1J27, and relevant technical requirements are newly added (refer to 7.1 and 7.4; 6.1 and 6.4 in Version 2008);
-- The stipulations of chemical compositions P and S in 1J22 become more rigorous; the stipulation that residual element Cr shall be ≤ 0.20% is added (refer to Table 3; Table 10 in Version 2008);
-- The magnetic performance (B800, B1600, B2400) of 1J22 cold-rolled strip is enhanced, the magnetic performance (B1600, Hc) of cold-drawn wire, hot-rolled flat material and hot-rolled (wrought) bar is enhanced (refer to Table 5; Table 11 in Version 2008);
-- The stipulations of surface quality of cold-rolled strip become more rigorous (refer to 7.6; 7.1 in Version 2008);
-- The fundamental physical parameters of alloys and the typical performance value of alloy materials are added as a supplement (refer to Appendix B; Appendix B in Version 2008).
This Part is proposed by China Iron and Steel Industry Association (CISA). This Part is summarized by National Technical Committee 183 on Steel
Soft Magnetic Alloys - Part 3. Iron-cobalt Alloys
1 Scope
This Part in GB/T 14986 specifies the terms, definitions, classification, content of order, dimension, appearance, technical requirements, test methods, inspection rules, packaging, mark and quality certificate of high saturation magnetic induction, high magnetostriction coefficient 1J21, 1J22 and 1J27 iron-cobalt soft magnetic alloy. This Part is applicable to cold-rolled strip, cold-drawn wire, hot-rolled flat material and hot-rolled (wrought) bar (hereinafter referred to as alloys) of 1J21, 1J22 and 1J27 iron- cobalt alloy.
2 Normative References
The following documents are indispensable to the application of this Standard. In terms of references with a specified date, only versions with a specified date are applicable to this Standard. The latest version (including all the modifications) of references without a specified date is also applicable to this Standard.
GB/T 223.5 Steel and Iron - Determination of Acid-soluble Silicon and Total Silicon Content - Reduced Molybdosilicate Spectrophotometric Method
GB/T 223.11 Iron, Steel and Alloy - Determination of Chromium Content - Visual Titration or Potentiometric Titration Method
GB/T 223.13 Methods for Chemical Analysis of Iron, Steel and Alloy - The Ammonium Ferrous Sulfate Titration Method for the Determination of Vanadium Content
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 223.23 Iron, Steel and Alloy - Determination of Nickel Content - The Dimethylglyoxime Spectrophotometric Method
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 223.64 Iron, Steel and Alloy - Determination of Manganese Content - Flame Atomic Absorption Spectrometric Method
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 4162 Forged and Rolled Steel Bars - Method for Ultrasonic Testing
GB/T 14986.1-2018 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 20125 Low-alloy Steel - Determination of Multi-element Contents -
Inductively Coupled Plasma Atomic Emission Spectrometric Method
3 Terms and Definitions
Terms and definitions provided in GB/T 14986.1-2018 are applicable to this Standard. 4 Classification
In accordance with cobalt content, iron-cobalt alloys shall be classified into the following three types.
a) F1. cobalt content. 49.0% ~ 51.0%; vanadium content. 0.8% ~ 2.0%;
b) F2. cobalt content. 34.5% ~ 36%;
c) F3. cobalt content. 26.5% ~ 28.5%.
NOTE. iron-cobalt alloys is also known as “iron-cobalt vanadium alloys” in some publications.
5 Content of Order
Order-placing contract shall include the following content.
a) Number of this part;
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