Detail of GB/T 10560-2017

Introduction of GB/T 10560-2017

Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This standard is developed in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 10560-2008 High tensile steels of round link chains for mines, with respect to which, the following main changes have been made: ——the standard name is modified; ——the suffix letter K (for mines) is added to the steel grade; ——steel grades 15CrNi6K, 20MnNiCrMo32K, 20NiCrMo33K and 23MnNiCrMo53K are added; ——the product delivery state is modified and the method of finishing delivery is added; ——the relevant requirements of mechanical properties are modified; ——the corresponding indexes at common depths within (including) 50mm are supplemented for end hardenability inspection; ——the index of extra-fine steel is added for acid leaching macrostructure; ——the nonmetallic inclusion inspection items for steel are added; ——the inspection items for decarburized layer are added. This standard was proposed by China Iron and Steel Industry Association. This standard is under jurisdiction of the National Technical Committee on Iron and Steel of Standardization Administration of China (SAC/TC 183). The previous editions of this standard are as follows: ——GB/T 10560-1989 and GB/T 10560-2008. Steels for welded round link chains for mines 1 Scope This standard specifies the order contents, dimensions, shapes, weights and permissible deviations, technical requirements, test methods, inspection rules, packaging, marking and quality certificate, etc. of steels for welded round link chains for mines. This standard is applicable to the manufacture of round steels (hot-rolled/cold-drawn round steel) and wire rods (or coils) for welded round link chains for mines of coal mine scraper conveyor and coal plough. 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 222 Permissible tolerances for chemical composition of steel products GB/T 223.4 Alloyed steel - Determination of manganese content - Potentiometric or visual titration method GB/T 223.5 Steel and iron - Determination of acid-soluble silicon and total silicon content - Reduced molybdosilicate spectrophotometric method GB/T 223.8 Methods for chemical analysis of iron, steel and alloy－The sodium fluoride separation-EDTA titration method for the determination of aluminium content GB/T 223.9 Iron, steel and alloy - Determination of aluminium content - Chrom azurol S photometric method GB/T 223.11 Iron, steel and alloy - Determination of chromium content - Visual titration or potentiometric titration method GB/T 223.12 Methods for chemical analysis of iron, steel and alloy The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content GB/T 223.13 Methods for chemical analysis of iron, steel and alloy－The ammonium ferrous sulfate titration method for the determination of vanadium content GB/T 223.14 Methods for chemical analysis of iron, steel and alloy - The n-benzoyl-n-phenylhydroxylamine extraction photometric method for the determination of vanadium 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 223.23 Iron, steel and alloy - Determination of nickel content - The dimethylglyoxime spectrophotometric method 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 223.26 Iron, steel and alloy - Determination of molybdenum content - The thiocyanate spectrophotometric method GB/T 223.36 Methods for chemical analysis of iron, steel and alloy - The neutral titration method for the determination of nitrogen content after distillation separation GB/T 223.37 Methods for chemical analysis of iron steel and alloy - The indophenol blue photometric methods for the determination of nitrogen content after distillation separation GB/T 223.53 Methods for chemical analysis of iron, steel and alloy; The flame atomic absorption spectrophotometric method for the determination of copper content GB/T 223.54 Methods for chemical analysis of iron, steel and alloy; The flame atomic absorption spectrophotometric method for the determination of nickel content GB/T 223.58 Methods for chemical analysis of iron, steel and alloy - The sodium arsenite-sodium nitrite titrimetric method for the determination of manganese content GB/T 223.59 Iron, steel and alloy - Determination of phosphorus content - Bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue 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 223.61 Methods for chemical analysis of iron, steel and alloy; The ammonium phosphomolybdate volumetric method for the determination of phosphorus 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 223.64 Iron, steel and alloy - Determination of manganese content - Flame atomic absorption spectrometric method 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 223.74 Methods for chemical analysis of iron, steel and alloy The combustion gravimetric/gas-volumetric method for the determination of combined carbon content GB/T 223.75 Iron, steel and alloy - Determination of boron content - Methanol distillation-curcumin photometric method GB/T 223.76 Methods for chemical analysis of iron, steel and alloy The flame atomic absorption spectrometric method for the determination of vanadium content GB/T 223.81 Iron, steel and alloy - Determination of total aluminum and total boron contents - Microwave digestion-inductively coupled plasma mass spectrometric method GB/T 224 Determination of depth of decarburization of steel GB/T 225 Steel - Hardenability test by end quenching (Jominy test) GB/T 226 Test method for macrostructure and defect of steel by etching GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature GB/T 229 Metallic materials - Charpy pendulum impact test method GB/T 231.1 Metallic materials - Brinell hardness test - Part 1: Test method GB/T 232 Metallic materials - Bend test GB/T 702-2008 Hot-rolled steel bars - Dimensions, shape, weight and tolerances GB/T 905-1994 Dimension, shape, weight and tolerance for cold-drawn round, square and hexagonal steels GB/T 1979 Standard diagrams for macrostructure and defect of structural steels GB/T 2101 General requirements of acceptance, packaging, marking, and certification for section steel GB/T 2975 Steel and steel products - Location and preparation of samples and test pieces for mechanical testing GB/T 3077 Alloy structure steels GB/T 3078 Quality structural steel cold drawn bars GB/T 4336 Carbon and low-alloy steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method) GB/T 6394-2002 Metal-methods for estimating the average grain size GB/T 10561-2005 Steel - Determination of content of nonmetallic inclusions - Micrographic method using standards diagrams GB/T 13298 Inspection methods of microstructure for metals GB/T 13299 Steel - Determination of microstructure GB/T 14981-2009 Dimension, shape, mass and tolerance for hot-rolled round wire rod GB/T 17505 Steel and steel products - General technical delivery requirements GB/T 20066 Steel and iron - Sampling and preparation of specimen for the determination of chemical composition YB/T 081 Rule for rounding off of numberical values and judgement of testing values for technical standards of metallurgy 3 Order contents Contracts or orders made based on this standard shall cover the following items: a) product name; b) number of the standard; c) product grade; d) nominal diameter (specification); e) dimension and shape; f) weight or quantity; g) delivery state and mechanical properties; h) other special requirements. 4 Dimensions, shapes, weights and permissible deviations 4.1 Nominal diameter The nominal diameter of product is 8~65mm. As agreed by the supplier and the purchaser and noted in the contract, products with other diameters may also be supplied. 4.2 Permissible deviation of shape, weight and dimension 4.2.1 For the hot-rolled round steel, the dimensional precision shall meet the requirements of Group 2 or Group 1 in Table 1 of GB/T 702-2008, the bending degree shall meet the requirements of Group 2 in Table 10 of GB/T 702-2008, and the out-of-roundness shall meet the requirements of Table 9 in GB/T 702-2008. 4.2.2 For the cold-drawn round steel, the permissible deviation of shape and dimension shall meet the requirements of GB/T 905-1994, and the permissible deviation level shall meet the requirements of h11 and be indicated in the contract. 4.2.3 The dimensional precision of wire rod products shall meet the requirements of Grade B precision in GB/T 14981-2009. 4.2.4 Upon request of the purchaser, the permissible diameter deviation of the delivered products may be adjusted within the tolerance range. 4.3 Length and permissible deviation 4.3.1 Length 4.3.1.1 Generally, the round steel is delivered by fixed length which is noted in the contract. As agreed by both parties, short-length products with length less than the fixed length in the contract and not less than 3m may be delivered, with the total weight not greater than 10% of the total weight in the contract. 4.3.1.2 Where wire rods are delivered, each coil of wire rod is composed of one piece, and its coil weight and diameter are determined by the supplier according to the equipment conditions. Special requirements shall be determined through negotiation by the supplier and the purchaser. 4.3.2 Permissible deviation Where the round steel is delivered by fixed length, the fixed length value generally defaults to the minimum length of the delivered product, and the permissible maximum positive deviation is +50mm; where the fixed length value is required to be the maximum delivery length, it shall be indicated in the contract, and the permissible maximum negative deviation is -50mm. The delivery length of short-fixed-length products is for reference only. 5 Technical requirements 5.1 Steel grade and chemical composition 5.1.1 Steel grade and chemical composition (smelting analysis) shall meet the requirements of Table 1.

Contents of GB/T 10560-2017

Foreword i 1 Scope 2 Normative references 3 Order contents 4 Dimensions, shapes, weights and permissible deviations 5 Technical requirements 6 Test methods 7 Inspection rules 8 Re-inspection and judgment rules 9 Packaging, marking and quality certificate