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GB/T 32286.1-2015 PDF in English


GB/T 32286.1-2015 (GB/T32286.1-2015, GBT 32286.1-2015, GBT32286.1-2015)
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Standards related to (historical): GB/T 32286.1-2015
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GB/T 32286.1-2015: PDF in English (GBT 32286.1-2015)

GB/T 32286.1-2015 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.140.40 H 58 Soft magnetic alloys - Part 1: Nickel-iron alloys ISSUED ON: DECEMBER 10, 2015 IMPLEMENTED ON: NOVEMBER 01, 2016 Issued by: General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People’s Republic of China. Table of Contents Foreword ... 3 1 Scope ... 4 2 Normative references ... 4 3 Classification ... 6 4 Order content ... 6 5 Dimensions and appearance ... 7 5.1 Cold-rolled strips ... 7 5.2 Cold-rolled sheets ... 8 5.3 Cold-drawn wires ... 9 5.4 Cold drawn (rolled) pipes ... 9 5.5 Hot rolled (forged) flat bars and rods ... 9 6 Technical requirements ... 10 6.1 Designation and chemical composition ... 10 6.2 Smelting method ... 12 6.3 Delivery state ... 12 6.4 Magnetic properties ... 13 6.5 Other properties ... 21 6.6 Surface quality ... 21 6.7 Special requirements... 22 7 Test methods ... 22 8 Inspection rules ... 23 8.1 Inspection and acceptance ... 23 8.2 Batch rules ... 23 8.3 Sampling portion and sampling quantity ... 24 8.4 Re-inspection and determination rules ... 24 9 Packaging, marking and quality certification... 24 Appendix A (Informative) Recommended heat treatment system for samples ... 25 Appendix B (Informative) Basic physical parameters and typical mechanical properties of alloys ... 27 Appendix C (Informative) AC magnetic properties of 1J50, 1J79 and 1J85 alloys when magnetized in different states ... 29 Soft magnetic alloys - Part 1: Nickel-iron alloys 1 Scope This part of GB/T 32286 specifies the classification, order content, dimensions, appearance, technical requirements, test methods, inspection rules, packaging, marking and quality certification for nickel-iron soft magnetic alloy materials. This Part applies to cold-rolled strips, cold-drawn wires, cold-drawn (rolled) pipes, hot- rolled (forged) rods and flat bars of higher permeability and higher saturation magnetic induction intensity nickel-iron alloys 1J46, 1J50, 1J54 and high permeability nickel- iron alloys 1J76, 1J77, 1J79, 1J80, 1J85, 1J86; cold-rolled sheets of high permeability nickel-iron alloys 1J79 and 1J85; cold-rolled strips of nickel-iron rectangular magnetic alloys 1J34, 1J51, 1J52, 1J65, 1J67, 1J83, 1J403; cold-rolled strips of magnetic temperature compensation nickel-iron alloys 1J30, 1J31, 1J32, 1J33, 1J38; and cold- rolled strips of permanent permeability nickel-iron alloy 1J66. This Part does not apply to high hardness, high resistance and high permeability nickel- iron alloy materials, corrosion-resistant nickel-iron alloys and nickel-iron alloy materials for magnetic heads (hereinafter referred to as alloy materials). 2 Normative references The following referenced documents are indispensable for the application 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 222-2006, Permissible tolerances for chemical composition of steel products GB/T 223.8, Methods for chemical analysis of iron, steel and alloy - The sodium fluoride separation - EDTA titration method for the determination of aluminium content GB/T 223.11, Iron, steel and alloy - Determination of chromium content - Visual titration or potentiometric titration method GB/T 223.18, Methods for chemical analysis of iron steel and alloy - The sodium thiosulfate separation iodimetric method for the determination of cupper content GB/T 223.20, Methods for chemical analysis of iron steel and alloy - The Potentiometric titration method for the determination of cobalt content 3 Classification 3.1 Classified into the following five categories by the main characteristics: a) Higher permeability and higher saturation magnetic induction intensity nickel- iron alloys; b) High permeability nickel-iron alloys; c) Rectangular nickel-iron alloys; d) Magnetic temperature compensation nickel-iron alloys; e) Permanent permeability nickel-iron alloys. 3.2 Classified into the following four categories by the nickel content: a) E1: Nickel-iron alloys containing 72% ~ 83% nickel; b) E2: Nickel-iron alloys containing 54% ~ 68% nickel; c) E3: Nickel-iron alloys containing 45% ~ 51% nickel; d) E4: Nickel-iron alloys containing 30% ~ 40% nickel. 4 Order content The contract for ordering under this Part shall include the following: a) Product designation; b) Part number; c) Specifications; d) Weight (or quantity); e) Delivery state; f) Items or indicators negotiated by the supplier and the buyer and specified in the contract (if not specified, it shall be determined by the supplier); g) Special requirements (if necessary). Where: μLmax – the maximum value among the five inductive permeabilities μL, in millihenry per meter (mH/m); μLmin – the minimum value among the five inductive permeabilities μL, in millihenry per meter (mH/m). b) Determination of AC/DC stable value α≃: The measurement frequency is 60 Hz. The magnetic induction intensity B of AC magnetization is 0.03 T. Calculate the AC/DC stable value α≃ based on Formula (2): Where: μL – inductive permeability measured under AC magnetic field intensity, in millihenry per meter (mH/m); μL56 – inductive permeability when a DC magnetic field of 56 A/m is added to the AC magnetic field strength, in millihenry per meter (mH/m). c) Determination of temperature stable value αT: The measurement frequency is 60 Hz. The magnetic induction intensity B of AC magnetization is 0.03 T. Measure the inductive permeability μL at 90 ℃, room temperature (10 ℃ ~ 30 ℃) and -60 ℃. Select the larger of (μL90 ℃ - μLroom)/μLroom and (μLroom - μL-60℃)/μLroom as the temperature stable value. 8 Inspection rules 8.1 Inspection and acceptance The inspection and acceptance of alloy materials shall be carried out by the supplier's quality and technical supervision department. 8.2 Batch rules Alloy materials shall be submitted for inspection and acceptance in batches. Each batch shall consist of alloy materials of the same designation, same furnace number, same specification and same delivery state. ......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.