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GB/T 1301-2025: Hollow drill steels for rock drilling
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 1301-2025	English	279	Add to Cart	3 days [Need to translate]	Hollow drill steels for rock drilling
GB/T 1301-2008	English	165	Add to Cart	0--9 seconds. Auto-delivery	Hollow drill steels for rock drilling
GB/T 1301-1994	English	279	Add to Cart	3 days [Need to translate]	Rock drilling equipment. Hollow drill steels in bar form
GB 1301-1987	English	199	Add to Cart	2 days [Need to translate]	Hollow rock drill steel

GB/T 1301-2025: Hollow drill steels for rock drilling

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ICS 77.140.60 CCSH44 National Standards of the People's Republic of China Replaces GB/T 1301-2008 Hollow steel for rock drilling rods hexagonalandround, MOD) Published on 2025-08-29 Implemented on 2026-03-01 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document replaces GB/T 1301-2008 "Hollow Steel for Rock Drill Rods". Compared with GB/T 1301-2008, the main differences are in structural adjustments and rewriting. Aside from the logical changes, the main technical changes are as follows. ---Added "Terms and Definitions" (see Chapter 3); ---Added "Order Details" (see Chapter 5); ---Added "Manufacturing Processes" (see Chapter 6); ---Added hollow steel specifications. H38, H45, R60 (see Table 1); ---Added relevant requirements for grade ZK24Cr3Mo (see Tables 4 and 7); ---The dimensions and permissible deviations of hollow steel in specifications such as H38, H45, and R60 have been added (see Table 2 and Table 3); ---The permissible deviation of the basic dimension of the opposite side length of hexagonal hollow steel of H28 specification and above (including H28 specification) and circular hollow steel have been removed. The basic outer diameter tolerance is Grade II (see Tables 2 and 3 in the.2008 edition); ---Grain size requirements have been added (see 7.4); ---The single-sided decarburization depth and the inner surface decarburization depth of the hollow steel surface in the decarburization layer have been modified (see 7.3.1, 5.2 in the.2008 edition); ---The requirements for hollow steel inclusions have been added (see 7.5); ---Hot upsetting requirements have been added (see 7.7). This document is modified to adopt ISO 722.1991 "Rock drilling equipment - Hexagonal and round hollow steel bars". This document has undergone significant structural adjustments compared to ISO 722.1991.A table comparing the structural numbering changes between the two documents is available below. Appendix A. This document differs significantly from ISO 722.1991 in several technical aspects. The relevant clauses are indicated in vertical single-line margins. The lines (|) are marked. A summary of these technical differences and their reasons is provided in Appendix B. The following editorial changes have been made to this document. ---The standard name has been changed to "Hollow Steel for Rock Drill Rods". Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the China Iron and Steel Association. This document is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183). This document was drafted by. Shougang Guiyang Special Steel Co., Ltd., Metallurgical Industry Information and Standardization Research Institute, and Henan Qianwang Die & Fittings Co., Ltd. Ren Company. The main drafters of this document are. Xiong Jiaze, Zhao Shikun, Wang Yujie, Yang Yun, Liu Baoshi, Zhang Huifeng, Xu Haochi, Sun Shasha, and Chao Yuelin. It was first published in 1987 as GB/T 1301-1987, revised for the first time in.1994, revised for the second time in.2008, and this is the third revision. Revised. Hollow steel for rock drilling rods 1.Scope This document specifies the classification and designation of hexagonal and round hollow steel for rock drilling rods, ordering details, manufacturing process, technical requirements, and testing methods. Laws, inspection rules, packaging, marking and quality certificates. This document applies to hexagonal and round hollow steel (hereinafter referred to as "hollow steel") for rock drilling rods.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are listed below. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 222 Permissible deviations in the chemical composition of finished steel GB/T 223.11 Determination of Chromium Content in Iron and Steel and Alloys by Titration and Spectrophotometry (GB/T 223.11-2025, ISO 4937. 2024, MOD) GB/T 223.14 Chemical Analysis Methods for Iron and Steel Alloys - Determination of Vanadium Quantitatively by Tantalum Reagent Extraction Spectrophotometry GB/T 223.23 Determination of Nickel Content in Iron and Steel and Alloys - Dimethylglyoxime Spectrophotometric Method GB/T 223.25 Chemical Analysis Methods for Iron and Steel Alloys - Determination of Nickel Content by Gravimetric Method of Dimethylglyoxime GB/T 223.26 Determination of molybdenum content in iron and steel and their alloys - Thiocyanate spectrophotometric method GB/T 223.53 Chemical Analysis Methods for Iron and Steel Alloys - Determination of Copper Content by Flame Atomic Absorption Spectrophotometry GB/T 223.60 Determination of silicon content in iron and steel and their alloys by gravimetric method (GB/T 223.60-2024, ISO 439.2020, MOD) GB/T 223.62 Chemical Analysis Methods for Iron and Steel Alloys - Determination of Phosphorus Content by Butyl Acetate Extraction Spectrophotometric Method GB/T 223.63 Determination of Manganese Content in Iron and Steel and Alloys - Sodium (Potassium) Periodate Spectrophotometric Method (GB/T 223.63-2022) ISO 629.1982, NEQ GB/T 223.68 Chemical Analysis Methods for Iron and Steel Alloys - Determination of Sulfur Content by Potassium Iodate Titration after Combustion in Tubular Furnace GB/T 223.71 Chemical Analysis Methods for Iron and Steel Alloys - Determination of Carbon Content by Gravimetric Method After Combustion in Tubular Furnace GB/T 223.75 Determination of Boron Content in Iron and Steel Alloys - Methanol Distillation-Curcumin Spectrophotometric Method GB/T 224 Determination of decarburized layer depth in steel (GB/T 224-2019, ISO 3887.2017, MOD) GB/T 226 Steel - Low-magnification microstructure and defect testing method using acid etching GB/T 230.1 Metallic materials—Rockwell hardness test—Part 1.Test methods (GB/T 230.1-2018, ISO 6508-1. 2016, MOD) GB/T 2101 General Provisions for Acceptance, Packaging, Marking and Quality Certificate of Section Steel GB/T 4336 Determination of Multi-Element Content in Carbon Steel and Medium-Low Alloy Steels by Spark Discharge Atomic Emission Spectrometry (Conventional Method) GB/T 6394 Method for Determination of Average Grain Size of Metals GB/T 10561-2023 Standard rating chart microscopic examination method for the determination of non-metallic inclusion content in steel (ISO 4967.2013, MOD) GB/T 20066 Sampling and sample preparation methods for the determination of chemical composition of steel and iron (GB/T 20066-2006, ISO 14284. 1996, IDT) GB/T 20123 Determination of Total Carbon and Sulfur Content in Iron and Steel - Infrared Absorption Method After Combustion in a High-Frequency Induction Furnace (Conventional Method) (GB/T 20123-2006,ISO 15350.2000,IDT) ...