GB/T 37620-2019 English PDFUS$439.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 37620-2019: Corrosion-resisting alloy forging Status: Valid
Basic dataStandard ID: GB/T 37620-2019 (GB/T37620-2019)Description (Translated English): Corrosion-resisting alloy forging Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: H59 Classification of International Standard: 77.140.99 Word Count Estimation: 22,279 Date of Issue: 2019-06-04 Date of Implementation: 2020-05-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 37620-2019: Corrosion-resisting alloy forging---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.Corrosion-resisting alloy forging ICS 77.140.99 H59 National Standards of People's Republic of China Corrosion resistant alloy forging Published on.2019-06-04 2020-05-01 implementation State market supervision and administration China National Standardization Administration issued ContentForeword I 1 Scope 1 2 Normative references 1 3 Category 2 4 Ordering content 2 5 size, shape, weight 2 6 Technical requirements 3 7 Test method 12 8 Inspection rules 13 9 Packaging, Marking and Quality Certificate 14 Appendix A (Normative Appendix) Forging Machining allowance and dimensional tolerance 15 Appendix B (Normative) Forging mechanical properties Sample blank sampling position 19ForewordThis 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). This standard was drafted. Fushun Special Steel Co., Ltd., Yongxing Special Stainless Steel Co., Ltd., Metallurgical Industry Information Standards Research Institute, Baosteel Special Steel Co., Ltd., Shanghai Yilang Alloy Materials Co., Ltd. The main drafters of this standard. Gu Qiang, Yan Yan, Zhang Peng, Chen Qingxin, Wang Jianyong, Fu Huaqing, Yan Yuming, Li Xiaodong, Xu Xiaoping, Liu Xiaopei, Ding Binhua. Corrosion resistant alloy forging1 ScopeThis standard specifies the classification, ordering content, size, shape, weight and technology of iron-nickel-based and nickel-based deformed corrosion-resistant alloy forged bars and forgings. Technical requirements, test methods, inspection rules, packaging, marking and quality certificates. This standard applies to iron-nickel and nickel-based deformed corrosion-resistant alloy forged bars and forgings (hereinafter collectively referred to as forged materials).2 Normative referencesThe following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 223.3 Methods for chemical analysis of steels and alloys - Determination of phosphorus content by diantipyrine methane phosphomolybdate gravimetric method GB/T 223.4 Determination of manganese content in steel and alloys - Potentiometric titration or visual titration GB/T 223.8 Methods for chemical analysis of steels and alloys - Sodium fluoride separation - EDTA titration GB/T 223.11 Determination of chromium content in steels and alloys - either titration or potentiometric titration GB/T 223.13 Methods for chemical analysis of steels and alloys - Determination of vanadium content by ferrous ammonium sulphate titration GB/T 223.17 Methods for chemical analysis of steels and alloys - Determination of titanium content by diantipyrylmethane photometric method GB/T 223.18 Methods for chemical analysis of steels and alloys - Separation of sodium thiosulfate - Iodometric method GB/T 223.22 Methods for chemical analysis of steels and alloys - Determination of amount of cobalt by nitroso-R salt spectrophotometric method GB/T 223.25 Methods for chemical analysis of steels and alloys - s GB/T 223.28 Determination of molybdenum content by the method of α-benzoin method GB/T 223.29 Determination of lead content in steel and alloys - Precipitation - xylenol orange spectrophotometric method GB/T 223.31 Determination of arsenic content in steels and alloys - Distillation separation - Molybdenum blue spectrophotometric method GB/T 223.38 Methods for chemical analysis of steels and alloys - Ion exchange separation - Gravimetric method GB/T 223.43 Determination of chemical tungsten content of steels and alloys - Gravimetric method and spectrophotometric method GB/T 223.47 Methods for chemical analysis of steels and alloys - Determination of enthalpy GB/T 223.50 Methods for chemical analysis of steels and alloys - Determination of tin content by direct photometric method with phenylfluorone- cetyltrimethylamine bromide GB/T 223.60 Steel and alloys - Determination of silicon content by perchloric acid dehydration gravimetric method GB/T 223.68 Steel and alloy chemical analysis method - Determination of sulfur content by potassium iodate titration after combustion in tubular furnace GB/T 223.69 Determination of carbon content of steel and alloys GB/T 223.70 Determination of iron content in steels and alloys - Orthophenanthroline spectrophotometric method GB/T 228.1 tensile testing of metallic materials - Part 1 GB/T 228.2 tensile testing of metallic materials - Part 2. GB/T 908-2019 Forged steel bar size, shape, weight and tolerance GB/T 1786-2008 Ultrasonic inspection method for forged round cake General provisions for GB/T 2101 steel acceptance, packaging, marking and quality certificates GB/T 2975-2018 Steel and steel products, mechanical properties test sampling position and sample preparation Ultrasonic testing method for GB/T 6402 steel forgings GB/T 6394 method for determination of average grain size of metals GB/T 8888 heavy non-ferrous metal processing products packaging, marking, transportation, storage and quality certificate GB/T 10561-2005 Determination of non-metallic inclusions in steel - Standard s GB/T 14999.2 Test Methods for Superalloys - Part 2. Lateral Low-magnitude Structure and Defect Acid Leaching Test GB/T 15007-2017 Corrosion resistant alloy grade GB/T 15260 Corrosion-resistant nickel alloy intergranular corrosion test method for metals and alloys GB/T 20066 Sampling and sample preparation method for samples for determination of chemical composition of steel and iron GB/T 20123 Determination of total carbon and sulfur content of steels - Infrared absorption method after high-frequency induction furnace combustion (conventional method) GB/T 36164 Determination of multi-element content of high-alloy steels by X-ray fluorescence spectrometry (conventional method)3 classification3.1 Forged bars are classified into the following three categories according to the surface condition of the delivery. a) Hot forged bar. commonly known as black leather, which is delivered on the original surface (or pickled, sandblasted). b) Polished bar. A round bar that has been surfaced and polished to a metal shiny surface. c) Machined bars. Bars that have been machined by surface milling and delivered on a metallic shiny surface. 3.2 Forgings are divided into the following four categories according to their basic shapes. a) Shaft forgings. straight shafts with a circular (square) section, stepped shafts and shafted forged products with flanges. b) Cake forgings. The axial height is smaller than the outer diameter, and the final process is a forged cake-shaped forged product. c) Ring forgings. Annular forged products with axial height less than the outer diameter and reamed. d) Barrel forgings. cylindrical forged products with an axial height greater than the outer diameter and elongated.4 Ordering contentContracts or orders ordered in accordance with this standard shall include the following. a) the standard number; b) alloy grades; c) the weight (or quantity) of the delivery; d) the size, shape and tolerance of the forged bar, or the machining allowance, size and tolerance of the forging (or provide forging drawings); e) smelting methods (see 6.2); f) using the processing method (when not specified, according to the cutting process); g) delivery status (see 6.4); h) items or indicators that are negotiated by the supplier and the buyer and should be indicated in the contract (when not specified, determined by the supplier); i) Other special requirements (see 6.11). 5 size, shape, weight 5.1 Forged bar size, shape and tolerance 5.1.1 The dimensions and tolerances of hot forged bars and polished bars with nominal diameter (or side length and thickness) of 40mm~600mm shall be consistent with The provisions of Table 1 shall conform to the requirements of GB/T 908-2019. Table 1 Dimensions and allowable deviations of hot forged bars and polished bars 5.1.2 The dimensions and tolerances of machined bars shall comply with the requirements of Table 2, and the shape shall comply with the provisions of 4.4.3 of GB/T 908-2019. However, the bar bending should be no more than 2.0mm per meter, and the total bending should be no more than 0.20% of the total length. Table 2 The dimensions and tolerances of machined bars are in millimeters 5.1.3 The dimensions, shape and tolerance of the forged bars of other cross-section shapes shall be determined by the supplier and the purchaser and shall be indicated in the contract. 5.2 Forging machining allowance and size tolerance 5.2.1 The size and shape of the forgings shall be in accordance with the drawings and may also be in accordance with the dimensions and shape specified in the contract. 5.2.2 Forging machine machining allowance and dimensional tolerance shall comply with the following requirements. a) For shafts (including polished state) forging allowances and dimensional tolerances, see Table A.1 of Appendix A; b) The allowable deviation of machining allowance and size for cake forgings is shown in Table A.2; c) The allowable deviation of machining allowance and size for ring forgings is shown in Table A.3; d) The allowable deviation of machining allowance and size for barrel forgings is shown in Table A.4. 5.2.3 For other types of forgings or machining forgings, the allowance for machining allowances and dimensions shall be in accordance with the forging drawings. 5.3 weight Forged bars are delivered at actual weight. Forgings are delivered on theoretical weight.6 Technical requirements6.1 Grades and chemical composition 6.1.1 The alloy grade of the forged material shall comply with the requirements of Table 3. The chemical composition (melting analysis) shall comply with the requirements of Table 4. Table 3 alloy grade 6.2 Smelting methods Unless otherwise specified in the contract, the method of smelting the alloy is chosen by the supplier. However, when using the electric arc furnace smelting method, it should be refined outside the furnace. (AOD/VOD). 6.3 Forging ratio 6.3.1 When alloy ingots and billets are forged, the forging ratio of the main section of the forgings shall not be less than 3. 6.3.2 When forging with rolled material, the forging ratio of the main section of the forging shall not be less than 1.6. 6.4 Delivery status 6.4.1 Forged bars and forgings are usually delivered in a forged or solid solution state. 6.4.2 According to the agreement between the supplier and the buyer, and stated in the contract, the forged round bars and forgings can be polished or machined to the surface condition. 6.5 Mechanical properties 6.5.1 Forged bars 6.5.1.1 Forged bars delivered in a forged state, the longitudinal mechanical properties of the bars are determined by using a sample prepared by solid solution processing. The test results shall comply with the requirements of Tables 5 and 6. 6.5.1.2 Forged bars delivered in solution treatment state, the samples are cut directly on the bar in the delivery state for mechanical property test. The results of the mechanical properties test shall comply with the requirements of Tables 5 and 6. 6.5.1.3 According to the requirements of the purchaser, the tangential or radial mechanical properties of the bar can also be determined. The specific indicators are determined by the supplier and the buyer. Table 5 Mechanical properties of wrought bars 6.5.2 Forgings 6.5.2.1 Forgings delivered in a forged condition, the mechanical properties of the forged parts are determined by using the samples prepared by the solution-treated blanks, and the test results are obtained. Should comply with the provisions of Table 7. 6.5.2.2 Forgings delivered in solution treatment state, directly on the forgings in the delivery state, cut the samples according to the following provisions for mechanical performance inspection. The test results shall comply with the requirements of Table 7. a) for shaft forgings, for axial specimens; b) for a pie forging, a tangential specimen; c) for ring forgings, tangential specimens; d) For tubular forgings, axial specimens. 6.5.2.3 According to the requirements of the purchaser, the forgings and barrel forgings can also be used to measure the mechanical properties of other sampling directions. The parties negotiated to determine. 6.5.2.4 According to the requirements of the purchaser, the mechanical properties of the forgings can also be sampled according to the provisions of the drawings. The qualified value is determined by the supplier and the buyer. Table 7 Mechanical properties of forgings 6.6 low-fold organization The forging material shall be inspected for low-fold structure, and there shall be no visible shrinkage cavities, voids, cracks, bubbles, and clips on the cross-section acid-leaching low-magnification test piece. Defects such as impurities and pinholes. 6.7 Non-metallic inclusions 6.7.1 Forged materials shall be inspected for non-metallic inclusions and the results shall comply with the requirements of Table 8. Specific qualification level requirements should be stated in the contract. 6.7.2 According to the requirements of the purchaser and indicated in the contract, the inclusions of DS and E (including aluminum and titanium alloys) can be inspected. It needs to be determined by both parties. Table 8 Non-metallic inclusions qualification level 6.8 grain size The average grain size of NS1102, NS1104, NS1106 and NS1502 grade forged bars or forgings in solid solution condition shall be 5 Or thicker than level 5. 6.9 Ultrasonic testing Forgings shall be ultrasonically tested and their level of conformity shall be negotiated between the supplier and the purchaser and specified in the contract. 6.10 Surface quality 6.10.1 Forged bars 6.10.1.1 Hot forged bars and polished bars for pressure processing shall have no visible cracks, crusting, folding or inclusions on the surface. If there is The defects shall be removed. The depth of removal shall be in accordance with the provisions of Table 9 from the actual size of the bar. The clearance width shall not be less than 5 times the depth. The maximum clearance depth of a section must not exceed one. Allows for individual small scratches, pressures that do not exceed half of the tolerance from the actual size Traces and pitting exist. Table 9 Forged bars for press working allow clearance depth units in millimeters 6.10.1.2 For hot forged bars and polished bars for cutting, the surface shall be such that the depth from the nominal size of the bar does not exceed the partial imperfections of Table 10. Table 10 Partial imperfections for forged bars for cutting allow depth units in millimeters 6.10.1.3 The surface of machined bars shall be clean and smooth and shall be free from cracks, folds, crusting and scale. If the above defects exist, allow Partial grinding is removed, the dressing should be rounded and the minimum size of the forged bar can be guaranteed. 6.10.2 Forgings 6.10.2.1 Unless there are special requirements on the surface quality in the forging drawings, there should be no visible cracks, slag inclusions, crusting and folding on the forging surface. defect. If any of the above defects are to be removed, the machining allowance at the clearing point shall be not less than half of the machining allowance of the corresponding single-sided machine. 6.10.2.2 Forgings are allowed to be repaired with matching welding consumables. Allowable parts, depth and area of repair welding, welding materials used, welding wages Grid and welding process parameters, non-destructive testing methods and qualification levels before and after welding shall be determined by both parties. 6.10.2.3 The supplier shall provide the purchaser with a sketch of the location, depth and area of the forging weld, welding materials, welding process parameters and non-destructive testing reports. 6.11 Special requirements According to the requirements of the purchaser, the forged bar or forgings with the following special requirements may be supplied after consultation between the supplier and the buyer and indicated in the contract. a) reduce or relax the chemical composition of the grades listed in Table 4; b) providing residual lead, arsenic, antimony, tin, antimony; c) order wrought bars or forgings of other grades in GB/T 15007-2017; d) detecting high temperature mechanical properties; e) detecting corrosion resistance; f) Other requirements.7 Test methods7.1 The inspection items and test methods for wrought bars or forgings are to comply with the requirements of Table 11. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 37620-2019_English be delivered?Answer: Upon your order, we will start to translate GB/T 37620-2019_English as soon as possible, and keep you informed of the progress. 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