Standard No.:	YB/T 5241-2014
English Name:	Iron-nickel and iron-nickel-cobalt alloys with low expansion
Chinese Name:	低膨胀铁镍、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 5241-2005 Iron-nickel、iron-nickel-cobalt of low expansion
Language:	English
File Format:	PDF
Word Count:	5500 words
Price(USD):	184.0
Delivery:	via email in 1 business day

Iron-nickel and iron-nickel-cobalt alloys with low expansion 1 Scope This standard specifies the dimensions, shapes, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of bars, strips, flat bars, wires and pipes made of iron-nickel alloy of Grade 4J36, free-cutting alloy of Grade 4J38 and iron-nickel-cobalt alloys of Grades 4J32, 4J32A and 4J40. This standard is applicable to the manufacture of low-expansion iron-nickel and iron-nickel-cobalt alloys for instrument parts of approximately constant dimension and high precision within a certain range of ambient temperature. 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 (including any amendments) applies. GB/T 223.3 Methods for chemical analysis of iron, steel and alloy - The diantipyryl methane phosphomolybdate gravimetric method for the determination of phosphorus 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 223.19 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 fotentiometric titration method for the determination of cobalt content GB/T 223.21 Methods for chemical analysis of iron, steel and alloy - The 5-Cl-PADAB spectrophotometricmethod 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 223.40 Iron, steel and alloy - Determination of niobium content - The sulphochlorophenol S spectrophotometric method GB/T 223.52 Methods for chemical analysis of iron, steel and alloy - The hydroxylamine hydrochloride-iodometric method for the determination of selenium 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

Foreword i 1 Scope 2 Normative references 3 Order content 4 Classification and codes 5 Dimensions and shapes 6 Technical requirements 7 Test methods 8 Inspection rules Annex A (Informative) Typical average linear expansion coefficient of alloy