GB/T 14986.4-2018 English PDF (GBT14986.4-2018)

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GB/T 14986.4-2018: Soft magnetic alloys -- Part 4: Iron-chromium alloys
GB/T 14986.4-2018
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 4. Iron-chromium 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 Content of Order ... 6 
5 Dimension and Appearance ... 7 
6 Technical Requirements ... 7 
7 Test Methods ... 9 
8 Inspection Rules ... 9 
9 Packaging, Mark and Quality Certificate ... 10 
Appendix A (informative appendix)... 11 
Appendix B (informative appendix) ... 12 
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-chromium alloys;
-- Part 5. iron-aluminum alloy.
This is the fourth 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-chromium 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.
-- 1J111 alloy and relevant technical requirements are added (refer to Chapter 5 and
6.4);
-- The limitation of S element content in 1J116 and 1J117 becomes more rigorous;
the upper limit changes from 0.020% to 0.015% (refer to Table 1; Table 10 in
Version 2008);
-- 1J117 cold-rolled strip and relevant technical requirements are added (refer to
Chapter 1 and Table 2; Chapter 1 in Version 2008);
-- 1J116 and 1J117 cold-drawn wire and relevant technical requirements are added
(refer to Chapter 1 and Table 2; Chapter 1 in Version 2008);
-- Smelting methods are modified (refer to 6.2; 6.2 in Version 2008);
-- The magnetic performance of 1J116 is enhanced; coercivity decreases from 80
A/m to 70 A/m (refer to Table 3; Table 13 in Version 2008);
-- The re-inspection and determination rules of alloy bar low-magnification and
tower-shaped texture are added as a supplement (refer to 8.4.2, 8.4.3; Chapter
9 in Version 2008);
Soft Magnetic Alloys - Part 4. Iron-chromium Alloys
1 Scope
This Part in GB/T 14986 specifies the terms, definitions, content of order, dimension,
appearance, technical requirements, test methods, inspection rules, packaging, mark
and quality certificate of iron-chromium soft magnetic alloys with relatively high
saturation, magnetic induction strength, and relatively low coercivity.
This Part is applicable to cold-rolled strip, cold-rolled sheet, cold-drawn wire, hot-rolled
strip, hot-rolled wire rod and hot-rolled (wrought) bar (hereinafter referred to as alloys)
that apply 1J111, 1J116 and 1J117 iron-chromium soft magnetic alloys to certain
corrosive medium.
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 Content of Order
Order-placing contract shall include the following content.
a) Number of this part;
b) Alloy trademark;
c) Dimension and precision division (refer to Chapter 5);
d) Weight (or quantity);
e) State of delivery (refer to Table 2);
f) Special requirements (if necessary, refer to 6.7).