GB/T 38524-2020 English PDFUS$189.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 38524-2020: Hafnium bars and hafnium wires Status: Valid
Basic dataStandard ID: GB/T 38524-2020 (GB/T38524-2020)Description (Translated English): Hafnium bars and hafnium wires Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: H63 Classification of International Standard: 77.150.99 Word Count Estimation: 10,122 Date of Issue: 2020-03-06 Date of Implementation: 2021-02-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 38524-2020: Hafnium bars and hafnium wires---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.Hafnium bars and hafnium wires ICS 77.150.99 H63 National Standards of People's Republic of China Hafnium rod and hafnium wire 2020-03-06 released 2021-02-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by China Nonferrous Metals Industry Association. This standard is under the jurisdiction of the National Nonferrous Metals Standardization Technical Committee (SAC/TC243). Drafting organizations of this standard. National Nuclear Bao Titanium and Zirconium Industry Co., Ltd., Northwest Zirconium Tube Co., Ltd., Nanjing Youtian Metal Technology Co., Ltd., West Ministry of Superconducting Materials Technology Co., Ltd., China Atomic Energy Industry Co., Ltd., Non-ferrous Metal Technology and Economic Research Institute. The main drafters of this standard. Wang Chenyang, Yue Qiang, Zhou Mingliang, Lei Dongping, Wang Zengmin, Shi Yiming, Hou Fengqi, Chen Tiankai, Li Xianjun, Zhang Jiangfeng. Hafnium rod and hafnium wire1 ScopeThis standard specifies the technical requirements, test methods, inspection rules and signs, packaging, transportation, storage, quality certificates, and certificates of hafnium rods and hafnium wires. The content of the purchase order (or contract), etc. This standard applies to the nuclear industry and general industrial hafnium rods and wires produced by forging, extrusion, rolling and drawing processes.2 Normative referencesThe 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 228.1 Tensile Test of Metallic Materials Part 1.Room Temperature Test Method GB/T 228.2 Tensile Test of Metallic Materials Part 2.High Temperature Test Method GB/T 34485 Ultrasonic testing method for zirconium and zirconium alloy processed products3 Technical requirements3.1 Materials Hafnium rods and hafnium wires should be produced using ingots melted by electron beam melting or (and) vacuum consumable electric arc furnaces, and the number of ingot melting should not be Less than 2 times. 3.2 Product Classification Hafnium rods and hafnium wires are divided into two grades, Hf-1 and Hf-01, according to their chemical composition. Hafnium rods and hafnium wires are delivered in a recrystallized and annealed state. Hafnium rod and The brand, supply status and specifications of the hafnium wire should meet the requirements of Table 1. Table 1 Brand, status and specification of hafnium rod and hafnium wire Brand variety diameter mm length mm Supply status Hf-1 Hf-01 Wire 1~< 9.5 ≥500a Centerless grinding, drawing or pickling surface Bars 9.5~25 300~4000 Centerless grinding or pickling surface a Generally available on disk (roll). The straight wire length is 500mm~1000mm. 3.3 Chemical composition The chemical composition of the product and the chemical composition of the buyer during the re-inspection shall meet the requirements of Table 2. Table 2 Chemical composition% (mass fraction) Category Nuclear Industry General Industry Grade Hf-01 Hf-1 Main component Hf margin Impurities, no greater than Al 0.010 0.050 C 0.015 0.025 Cr 0.010 0.050 Cu 0.010- H 0.0025 0.0050 Fe 0.050 0.0750 Mo 0.0020- Ni 0.0050- Nb 0.010- N 0.010 0.0150 O 0.040 0.130 Si 0.010 0.050 W 0.020- Sn 0.0050- Ti 0.010 0.050 Ta 0.0150 0.0150 U 0.0010- V 0.0050- Zra 3.5 3.5 The content of aZr can also be implemented as agreed upon by the supplier and the buyer. 3.4 Dimensions and allowable deviation 3.4.1 Wires are generally supplied in reels (rolls). Straight wire can be provided when requested by the buyer and indicated in the contract. 3.4.2 The diameter and allowable deviation of bars and wires shall meet the requirements of Table 3. Table 3 Diameter and allowable deviation unit is mm Allowable deviation of diameter 1~4.8 ±0.05 >4.8~16 ±0.08 >16~19 ±0.10 >19~25 ±0.13 3.4.3 The allowable deviation of the straight wire length is 6.0mm. The allowable deviation of the length of the bar length less than 1000mm is The allowable deviation of the length of the bar with a length ranging from 1000mm to 4000mm is 9.0mm. 3.4.4 The curvature of the straight wire shall not exceed 1.6mm/m, and the curvature of the bar shall not exceed 1.0mm/m. 3.5 Mechanical properties 3.5.1 Mechanical properties of wire When required by the buyer and specified in the contract, the room temperature mechanical properties of the wire shall be reported as measured values or determined through negotiation between the supplier and the buyer. 3.5.2 Mechanical properties of bars The room temperature mechanical properties of bars used in the nuclear industry should meet the requirements in Table 4.The high temperature mechanical properties shall be determined through negotiation between the supplier and the buyer. Tensile test The test uses a strain rate of 0.00005s-1~0.00012s-1.After passing the yield point, the strain rate can be increased to 0.0008s-1 until the test Kind of break. Table 4 Mechanical properties of bars Grade Test temperature Tensile strength Rm MPa Specified plastic extension strength Rp0.2 MPa Elongation after breaking A50mm Hf-01 Room temperature ≥400 ≥150 ≥22 3.6 Corrosion performance The bars and wires used in the nuclear industry should be tested for corrosion performance, and the samples should be tested at 360 5-5℃, 18.6MPa±1.4MPa water vapor 672 8 0h corrosion, after the corrosion test, the weight gain of the sample should not exceed 10mg/dm2.Corrosion performance can also be negotiated by the supplier and the demander Seek execution. 3.7 High and low magnification structure 3.7.1 Bars and wires are not allowed to have cracks, folds, pores, segregation, shrinkage, metal or non-metallic inclusions, and other visual inspections at low magnifications. See the metallurgical defects. 3.7.2 When required by the buyer and specified in the contract, the bar can be inspected by high-powered organization, and the acceptance index shall be negotiated by the supplier and the buyer. 3.8 Surface quality 3.8.1 The surface of the wire should be clean, and there should be no cracks, peeling, thorns and inclusions. The wire surface is allowed to have a slight deviation that does not exceed the allowable deviation of the wire. Poor local scratches, scrapes, spots and pits, etc. 3.8.2 The surface of the bar should be clean, free of foreign objects, horizontal cracks and longitudinal splits are not allowed on the surface, and the allowable depth does not exceed the allowable deviation of the size Half of the scratches, indentations and pits. 3.9 Ultrasonic testing Bars used in the nuclear industry should be subjected to ultrasonic testing, and bars are not allowed to have defects exceeding the standard damage equivalent. The standard injury is drill one along the radial direction of the rod ϕ0.8mm×3mm flat bottom hole.4 Test method4.1 The chemical composition shall be implemented in accordance with the method agreed between the supplier and the buyer. 4.2 Dimensional inspection shall be carried out with corresponding precision measuring tools or the method shall be determined through negotiation between the supplier and the buyer. 4.3 The room temperature tensile test is carried out according to GB/T 228.1, and the high temperature tensile test is carried out according to GB/T 228.2. 4.4 The corrosiveness test method is negotiated and determined by both parties. 4.5 High and low magnification organization shall be carried out in accordance with the method determined by the supplier and the buyer. 4.6 The surface quality shall be inspected visually. 4.7 Ultrasonic testing shall be implemented in accordance with GB/T 34485.5 Inspection rules5.1 Inspection and acceptance 5.1.1 The product should be inspected by the supplier's quality inspection department to ensure that the product quality meets the requirements of this standard or contract (or purchase order), and fill in Write product quality certificate. 5.1.2 The products received by the buyer shall be checked and accepted according to the content specified in this standard. If the test result does not conform to the provisions of this standard, Propose to the supplier within three months from the date of receipt of the product, and the supplier and demander shall negotiate and resolve. If arbitration is required, arbitration sampling shall be jointly conducted by both parties get on. 5.2 Batch Products should be submitted for inspection and acceptance in batches, and each batch should have the same brand, melting furnace number, specification, manufacturing method, status, production cycle and the same The product composition of the heat treatment furnace (batch). 5.3 Inspection items Each batch of products should be inspected for chemical composition, size and allowable deviation, high and low magnification, and surface quality. Bar products for nuclear industry should also Carry out mechanical properties, corrosion properties and ultrasonic inspections. 5.4 Sampling The sampling location and quantity of the product are shown in Table 5. Table 5 Sampling Chapter number required for sampling location and sampling quantity of inspection items Chapter number of test method chemical composition Take any sample from each batch for nitrogen, hydrogen, and oxygen content analysis. His composition is reported as the chemical composition of the original ingot. Ingot Chemistry The ingredients should be taken from its head, middle and bottom. The buyer takes a sample on the finished product 3.3 4.1 Dimensions and allowable deviations one by one (reel, roll) 3.4 4.2 Mechanical properties Take 2 samples per batch 3.5 4.3 Corrosion performance Two samples shall be taken for each batch 3.6 4.4 Two samples for each batch of high and low magnification structure 3.7 4.5 Surface quality one by one (disk, roll) 3.8 4.6 Ultrasonic testing one by one 3.9 4.7 5.5 Judgment of inspection results 5.5.1 In the sampling inspection project, if the test result of a sample is unqualified, take the product from the batch (including the original tested product) Double the sample to repeat the test of the unqualified item. If there is still one sample unqualified after repeated test results, the batch of products shall be deemed unqualified. However, the supplier is allowed to carry out repeated inspections one by one or one by one, and the qualified ones will be regrouped. 5.5.2 When the size and allowable deviation, surface quality or ultrasonic testing are unqualified, a single (reel, roll) product is deemed unqualified. 6 Marking, packaging, transportation, storage and quality certificate 6.1 Logo Each batch of qualified products should have a label or tag, indicating the product brand, specification, status, batch number, quantity and other information. 6.2 Packaging, transportation and storage 6.2.1 Bars and wires should be packed in boxes, which should be lined with moisture-proof paper. Bars or straight wires should be neatly placed in the box, and each layer should be separated by soft materials. open. The coiled wire material is wound with soft paper in two layers per coil, tied with a string and packed in a box. Use soft cushions around the box to prevent collisions. 6.2.2 During the transportation and storage of the product, it is necessary to prevent collision, vibration, moisture and corrosion of active chemical substances. 6.3 Quality certificate Each batch of products should be accompanied by a quality certificate, indicating. a) The name of the supplier; b) Product name, brand, specification and status; c) Smelting furnace number, batch number, batch weight and number of pieces; d) Analyze the inspection results and the mark of the inspection department; e) Number of this standard; f) Date of packaging. 7 Purchase order (or contract) content The contract (or purchase order) should at least include the following. a) Product name; b) Brand, specification and status; c) quantity; d) Number of this standard; e) Other. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 38524-2020_English be delivered?Answer: Upon your order, we will start to translate GB/T 38524-2020_English as soon as possible, and keep you informed of the progress. 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