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GB/T 38940-2020 English PDF

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GB/T 38940-2020: Precision expansion alloys for sealing to silicon and silicon components
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GB/T 38940-2020English189 Add to Cart 3 days [Need to translate] Precision expansion alloys for sealing to silicon and silicon components Valid GB/T 38940-2020

PDF similar to GB/T 38940-2020


Standard similar to GB/T 38940-2020

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Basic data

Standard ID GB/T 38940-2020 (GB/T38940-2020)
Description (Translated English) Precision expansion alloys for sealing to silicon and silicon components
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H58
Classification of International Standard 77.140.99
Word Count Estimation 10,195
Date of Issue 2020-06-02
Date of Implementation 2020-12-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 38940-2020: Precision expansion alloys for sealing to silicon and silicon components

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Precision expansion alloys for sealing to silicon and silicon components ICS 77.140.99 H58 National Standards of People's Republic of China Fine sealing alloy for silicon components 2020-06-02 released 2020-12-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the China Iron and Steel Association. This standard is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183). Drafting organizations of this standard. Central Iron and Steel Research Institute, Beijing Space Electromechanical Research Institute, China Aviation Industry Corporation Xi'an Flight Automatic Control Research Institute, Metallurgical Industry Information Standard Research Institute. The main drafters of this standard. Zhang Jinglin, Yu Yipeng, Ma Kui, Liang Pu, Dai Qiang, Zhang Jianfu, Zhang Xiwen, Yan Chengming, Huo Dengping. Fine sealing alloy for silicon components

1 Scope

This standard specifies the order content, classification and code, size, shape, weight, technical requirements, and test methods of the fine sealing alloy for silicon components. Laws, inspection rules, packaging, signs and quality certificates. This standard applies to iron-nickel-based, iron-nickel-based, iron-nickel-based, iron-nickel-based, iron-nickel-based, and Nickel-cobalt-based fixed expansion sealing alloy rods, flats, foils, strips, wires, pipes (hereinafter referred to as alloys).

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 222-2006 The allowable deviation of the chemical composition of the finished steel GB/T 223.5 Iron and steel-Determination of acid-soluble silicon and total silicon content-Reduced molybdosilicate spectrophotometric method GB/T 223.19 Methods for chemical analysis of iron, steel and alloy, 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 223.25 Methods for chemical analysis of iron, steel and alloy-The dimethylglyoxime gravimetric method for the determination of nickel content GB/T 223.40 Steel and alloy determination of niobium content-Chlorosulfonol S spectrophotometric method 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 223.64 Determination of manganese content in steel and alloy by flame atomic absorption spectrometry GB/T 223.79 Determination of multi-element content of steel by X-ray fluorescence spectrometry (conventional method) GB/T 223.85 Determination of sulfur content in iron and steel and alloy by infrared absorption method after combustion in an induction furnace GB/T 223.86 Determination of total carbon content of steel and alloy by infrared absorption method after combustion in induction furnace GB/T 2970 Ultrasonic Testing Method for Thick Steel Plate GB/T 4162-2008 Ultrasonic testing method for forged and rolled steel bars GB/T 4339 Determination of characteristic parameters of thermal expansion of metallic materials GB/T 5777 Seamless and welded (except submerged arc welding) full-circle automatic ultrasonic testing of longitudinal and/or transverse defects of steel pipes GB/T 6394 Method for determination of average grain size of metals GB/T 11170 Determination of multi-element content of stainless steel by spark discharge atomic emission spectrometry (conventional method) GB/T 14985-2007 General provisions for dimensions, shape, surface quality, test methods and inspection rules of expanded alloys GB/T 20066 Sampling and sample preparation methods for the determination of the chemical composition of steel and iron GB/T 20123 Determination of total carbon and sulfur content of iron and steel-Infrared absorption method after combustion in high frequency induction furnace (conventional method) GB/T 20125 Low-alloy steel determination of multi-element inductively coupled plasma emission spectrometry GB/T 22368 Low-alloy steel-Determination of multi-element content-Glow discharge atomic emission spectrometry (conventional method) GB/T 38938-2020 High-strength low-expansion alloy GB/T 38939 Nickel-based alloys. Determination of multi-element content. Spark discharge atomic emission spectrometry (conventional method) YB/T 5242 General Provisions for Packaging, Marking and Quality Certificate of Precision Alloy YB/T 5321-2006 Expansion alloy air tightness test method

3 Order content

The contract or order ordered according to this standard shall at least include the following contents. a) The standard number; b) Product name; c) grade; d) Delivery status; e) size and allowable deviation; f) weight or quantity; g) Other special requirements.

4 Classification and code

4.1 Alloy materials can be divided into. a) Soft state (S); b) Hard state (H). 4.2 Alloy materials can be divided into. a) Cold drawn (WCD); b) Cold drawn polishing (WCDG); c) Hot rolled (forged) state (WH). 5 Dimensions, appearance and weight The size, shape, weight and allowable deviation of alloy materials should meet the relevant regulations of GB/T 14985-2007.

6 Technical requirements

6.1 Grade and chemical composition The alloy grade and chemical composition (melting analysis and finished product analysis) should meet the requirements of Table 1.In the case of meeting the requirements of this standard, The chemical composition of nickel, cobalt, niobium, and copper is allowed to deviate from the regulations in Table 1, but should meet the regulations in Table 3 of GB/T 222-2006. 6.2 Smelting method Unless otherwise specified in the contract, the alloy should be smelted by vacuum induction furnace and vacuum induction electroslag remelting. 6.3 Delivery status 6.3.1 The bars are delivered in cold drawn, cold drawn and polished or hot rolled (forged) state. If there are requirements for the surface condition of the hot rolled (forged) material, it shall be included in the contract Specify. 6.3.2 Flat products are delivered in hot rolled (forged) state. 6.3.3 The delivery status of wires, strips, foils and pipes should meet the requirements of Table 2. 6.3.4 After negotiation between the supplier and the buyer, alloy materials in other delivery states are available. 6.4 Average linear expansion coefficient After the sample is treated according to the heat treatment system recommended in Table 3, the average linear expansion coefficient of the alloy material should meet the requirements of Table 3.Classic of alloy materials Type performance see Appendix A. 6.5 Metallographic structure 6.5.1 Phase transition After 4J330 alloy material is treated according to the heat treatment system specified in Table 3, the phase transition temperature of γ→α should be below -60℃. For diameter, edge For bars with a length or thickness greater than 25mm, local phase changes are allowed, but the proportion of phase changes should not exceed 5% of the test section. 6.5.2 Grain size 6.5.2.1 The average grain size of deep-drawn strips should be level 7 or finer, and grains larger than level 7 are allowed to exist, but should not exceed the total area Of 10%. 6.5.2.2 The average grain size of the alloy bars and flats in the delivery state should be level 3 or finer. This test is not required when the phase transformation test is qualified. 6.6 Air tightness According to the requirements of the buyer, the bar with a diameter or side length of not less than 15mm can be tested for airtightness and there should be no air leakage. 6.7 Surface quality The surface quality of the alloy material should meet the relevant regulations of GB/T 14985-2007. 6.8 Ultrasonic testing 6.8.1 Bars with a diameter and side length of not less than 12mm shall be subjected to ultrasonic testing, and the qualification level shall comply with GB/T 4162-2008 Class A Claim. 6.8.2 GB/T 2970 can be used for ultrasonic testing of flat materials and plates, and the qualified level shall be negotiated by the supplier and the buyer and indicated in the contract. 6.8.3 The pipes can be tested by GB/T 5777 ultrasonic testing, or by other general non-destructive testing methods. Qualification level is determined by supply and demand Both parties negotiated and indicated in the contract. If there are disputes caused by different methods, GB/T 5777 shall be the basis for arbitration. 6.9 Special requirements After negotiation between the supplier and the buyer and indicated in the contract, alloy materials meeting other special requirements can be supplied.

7 Test method

7.1 The inspection items and test methods of alloy materials should meet the requirements of Table 4. a The air tightness inspection is carried out by the buyer, and the thickness of the inspected sample should be indicated in the contract, otherwise the inspection shall be carried out according to sample A specified in YB/T 5321-2006. 7.2 The chemical composition analysis of the alloy is in accordance with GB/T 223.79, GB/T 11170, GB/T 20123, GB/T 20125, GB/T 22368, GB/T 38939 or general test methods are used for analysis, but GB/T 223.5, GB/T 223.19, GB/T 223.20, GB/T 223.25, GB/T 223.40, GB/T 223.60, GB/T 223.62, GB/T 223.64, GB/T 223.85, GB/T 223.86 The relevant regulations are carried out.

8 Inspection rules

8.1 Inspection and acceptance The inspection and acceptance of alloy materials are carried out by the supplier's technical quality supervision department. The purchaser has the right to inspect and accept according to the standard. airtight The sex test is carried out by the purchaser. 8.2 Batching rules Alloy materials should be submitted for inspection and acceptance in batches. Each batch should be made of the same alloy grade, the same heat number, the same processing method, the same size, and the same Delivery status and composition of alloy materials with the same heat treatment system. 8.3 Sampling quantity and sampling location The sampling quantity and sampling location of alloy materials should meet the requirements of Table 4. 8.4 Re-inspection and judgment rules The re-inspection and determination rules of alloy materials should comply with the relevant regulations of GB/T 14985-2007. 9 Packaging, marking and quality certificate The packaging, marking and quality certificate of alloy materials shall comply with the relevant regulations of YB/T 5242.

Appendix A

(Informative appendix) Typical properties of 4J339 and 4J330 alloys A.1 Refer to Table A.1 for the typical average linear expansion coefficient of alloy materials after treatment with the recommended heat treatment system in Table 3.

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