Standard No.:	YB/T 5231-2014
English Name:	Sealed iron-nickel-cobalt alloys with pe rmanent expansion
Chinese Name:	定膨胀封接铁镍钴合金
Professional Classification:	YB    Professional Standard - Metallurgy
Issued by:	Ministry of Industry and Information Technology
Issued on:	2014-10-14
Implemented on:	2015-4-1
Status:	valid
Superseding:	YB/T 5231-2005 Sealed iron-nickel-cobalt alloy with permanent ecpansion
Language:	English
File Format:	PDF
Word Count:	4000 words
Price(USD):	194.0
Delivery:	via email in 1~3 business day

Sealed iron-nickel-cobalt alloys with permanent expansion 1 Scope This standard specifies the order contents, classification and designation, dimensions, shapes, technical requirements, test methods and inspection rules, as well as packaging, and marking and quality certification of glass sealed iron-nickel-cobalt alloys 4J29 and 4J44 and ceramic sealed alloys 4J33, 4J34 and 4J46. This standard is mainly applicable to sealed iron-nickel-cobalt alloys with permanent expansion matched with hard glass or ceramics in electric vacuum, semiconductor industry and other application environments. 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 223.3 Methods for chemical analysis of iron, steel and alloy — The diantipyrylmethane phosphomolybdate gravimetric method for the determination of phosphorus 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 copper content GB/T 223.19 Methods for chemical analysis of iron, steel and alloy — The neocuproine-chloroform extraction photometric 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 223.21 Methods for chemical analysis of iron, steel and alloy — The 5-CI-PADAB spectrophotometric method for the determination of cobalt content GB/T 223.22 Methods for chemical analysis of iron, steel and alloy — The nitroso-R-salt spectrophotometric method for the determination of cobalt content GB/T 223.25 Methods for chemical analysis of iron, steel and alloy — The dimethylglyoxime gravimetric method for the determination of nickel content GB/T 223.28 Methods for chemical analysis of iron steel and alloy — The α-benzoinoxime gravimetric method for the determination of molybdenum content GB/T 223.59 Methods for chemical analysis of iron, steel and alloy — The reduced molybdoantimonyl phosphoric acid photometric method for the determination of phosphorus content GB/T 223.60 Methods for chemical analysis of iron, steel and alloy — The perchloric acid dehydration gravimetric method for the determination of silicon content GB/T 223.62 Methods for chemical analysis of iron, steel and alloy — The butyl acetate extraction photometric method for the determination of phosphorus content GB/T 223.63 Methods for chemical analysis of iron, steel and alloy — The sodium (potassium) periodate photometric method for the determination of manganese content GB/T 223.67 Iron, steel and alloy — Determination of sulfur content — Methylene blue spectrophotometric method GB/T 223.68 Methods for chemical analysis of iron, steel and alloy — The potassium iodate titration method after combustion in the pipe furnace for the determination of sulfur content GB/T 223.69 Iron, steel and alloy — Determination of carbon contents — Gas-volumetric method after combustion in the pipe furnace GB/T 223.71 Methods for chemical analysis of iron, steel and alloy — The gravimetric method after combustion in the pipe furnace for the determination of carbon content GB/T 223.72 Iron steel and alloy — Determination of sulfur content — Gravimetric method GB/T 228.1 Metallic materials — Tensile testing — Part 1: Method of test at room temperature GB/T 2975 Steel and steel products — Location and preparation of test pieces for mechanical testing GB/T 4162 Forged and rolled steel bars — Method for ultrasonic testing GB/T 4339 Test methods for thermal expansion characteristic parameters of metallic materials GB/T 4340.1 Metallic materials — Vickers hardness test — Part 1: Test method GB/T 5777 Seamless steel pipe and tubing — Methods for ultrasonic testing GB/T 6394 Determination of estimating the average grain size of metal GB/T 8651 Metal plates — Flaw detection method by the ultrasonic plate wave GB/T 14985-2007 General rules of dimensions, shape, surface quality, testing method and inspection for expansion alloys 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) YB/T 5242 General rules of packaging, marking and quality certification for precision alloys YB/T 5321-2006 Determination of hermeticity of expansion alloys 3 Order content Order contracts made based on this standard shall cover the following: a) standard No.; b) product name; c) designation; d) smelting method (see 6.1); e) delivery mass (or quantity); f) dimensions and shape; g) delivery condition (see 6.3); h) non-destructive testing methods and levels (see 6.10); i) special requirements. 4 Classification and code According to the delivery condition, alloys may be divided into: Soft (S); Hard (H); 1/4 Hard (H 1/4); 1/2 Hard (H 1/2); 3/4 Hard (H 3/4); Deep-drawing condition (DQ);

Foreword i 1 Scope 2 Normative references 3 Order content 4 Classification and code 5 Dimensions and shapes 6 Technical requirements 7 Test methods 8 Inspection rules 9 Packaging, marking and quality certification Annex A (Informative) Typical thermal expansion coefficient of alloy