GB/T 1301-2025 (GB/T 1301-2008) PDF EnglishUS$165.00 · In stock · Download in 9 seconds
GB/T 1301-2008: Hollow drill steels for rock drilling Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 1301: Historical versions
Similar standardsGB/T 1301-2008: Hollow drill steels for rock drilling---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT1301-2008GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.140.60 H 44 GB/T 1301-2008 Replacing GB/T 1301-1994 Hollow drill steels for rock drilling (ISO 722:1991, Rock drilling equipment - Hollow drill steels in bar form, hexagonal and round, MOD) ISSUED ON: AUGUST 19, 2008 IMPLEMENTED ON: APRIL 01, 2009 Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of the People’s Republic of China. Table of ContentsForeword ... 3 1 Scope ... 5 2 Normative references ... 5 3 Classification and code ... 6 4 Dimensions, shapes and allowable deviations ... 7 5 Technical requirements ... 10 6 Test methods ... 11 7 Inspection rules ... 12 8 Packaging, marking and quality certificates ... 12ForewordThis Standard modified and adopted ISO 722:1991 “Rock drilling equipment - Hollow drill steels in bar form, hexagonal and round” (English version). This Standard was redrafted based on ISO 722:1991. Based on the actual production situation of hollow drill steels for rock drilling in China, this Standard has modified the international standard when adopting it. The main technical differences are as follows: - ADD the corresponding contents of technical requirements, test methods, inspection rules, packaging, marking and quality certificates, etc.; - DELETE 38 and 45 from the nominal dimensions of hexagonal hollow drill steels, ADD the specification of 35; - ADD the specifications of R39-, R46- and R52- for round hollow drill steels; - DIVIDE the allowable deviation of basic dimension into two grades, while ISO 722 has only one grade. This Standard replaces GB/T 1301-1994 “Rock drilling equipment - Hollow drill steels in bar form”. Compared with GB/T 1301-1994, the main changes of this Standard are as follows: - ADJUST the corresponding contents of classification and code; - MODIFY the code of hollow drill steels for rock drilling: the original hexagonal code B is modified to H, and the round code D is modified to R; - EXPRESS the specification code by the nominal dimension value; - ADJUST the dimensions, shapes and allowable deviations; - ADD the designations of ZK95CrMo, ZK40SiMnCrNiMo, ZK23CrNi3Mo, ZK22SiMnCrNi2Mo, DELETE ZKT8; - ADD the requirements for macrostructures; - TIGHTEN the requirements for curvature, hardness and decarburized layer; - ADD the corresponding contents of packaging, marking, and quality certificates. This Standard was proposed by China Iron and Steel Association. This Standard shall be under the jurisdiction of National Technical Committee on Steel of Standardization Administration of China. Hollow drill steels for rock drilling1 ScopeThis Standard specifies the classification and code, dimensions, shapes and allowable deviations, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of hexagonal and round hollow drill steels for rock drilling. This Standard applies to hexagonal and round hollow drill steels for rock drilling.2 Normative referencesThe 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 223.11 Iron, steel and alloy - Determination of chromium content - Visual titration or potentiometric titration method GB/T 223.14 Methods for chemical analysis of iron, steel and alloy - The N-benzoy- N-phenylhydroxylamine extraction photometric method for the determination of vanadium 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 223.53 Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrophotometric method for the determination of copper content GB/T 223.60 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 223.68 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 223.71 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 223.75 Iron, steel and alloy - Determination of boron content - Methanol distillation-curcumin photometric method GB/T 224 Determination of depth of decarburization of steels GB/T 226 Test method for macrostructure and defect of steel by etching GB/T 230.1 Metallic Rockwell hardness test - Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T) (GB/T 230.1-2004, ISO 6508-1:1999, MOD) GB/T 2101 General requirement of acceptance, packaging, marking and certification for section steel GB/T 4336 Standard test method for spark discharge atomic emission spectrometric analysis of carbon and low - Alloy steel (routine method) GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition (GB/T 20066-2006, ISO 14284:1996, IDT)3 Classification and code3.1 Hollow drill steels are divided into hexagonal and round according to its appearance. 3.2 The main specification code shall comply with the provisions of Table 1. 3.3 The specifications and codes of other hollow drill steels can refer to the provisions of Table 1. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. |
