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GB/T 45781-2025 English PDF

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US$389.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 45781-2025: Seamless steel tubes for mechanical structures
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 45781-2025	389	Add to Cart	4 days	Seamless steel tubes for mechanical structures	Valid

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Basic data

Standard ID: GB/T 45781-2025 (GB/T45781-2025)
Description (Translated English): Seamless steel tubes for mechanical structures
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H48
Classification of International Standard: 77.140.75
Word Count Estimation: 19,116
Date of Issue: 2025-06-30
Date of Implementation: 2026-01-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 45781-2025: Seamless steel tubes for mechanical structures

---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/GBT45781-2025
ICS 77.140.75 CCSH48 National Standard of the People's Republic of China Machined seamless steel pipes for structural use Released on June 30, 2025 Implementation on January 1, 2026 State Administration for Market Regulation The National Standardization Administration issued

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 2 4 Order Content 2 5 Manufacturing Process 2 6 Technical Requirements 3 7 Test methods 14 8 Inspection Rules 15 9 Packaging, marking and quality certificate 15 Preface This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by the China Iron and Steel Association. This document is under the jurisdiction of the National Technical Committee on Steel Standardization (SAC/TC183). This document was drafted by. Zhejiang Minghe Steel Pipe Co., Ltd., Hengyang Valin Steel Pipe Co., Ltd., Jingjiang Special Steel Co., Ltd., Changsha Dali Steel Co., Ltd. Shen Hydraulic Engineering Co., Ltd., Zhejiang Taifu Seamless Steel Pipe Co., Ltd., Chongqing Liwan Precision Parts Co., Ltd., Chengde Jianlong Special Steel Co., Ltd. Company, Linyi Jinzhengyang Pipe Industry Co., Ltd., Wuxi Beilai Steel Pipe Co., Ltd., Daye Special Steel Co., Ltd., Linzhou Fengbao Pipe Industry Co., Ltd. Company, Zhejiang Huachang Hydraulic Machinery Co., Ltd., Zhejiang Honghai Steel Pipe Manufacturing Co., Ltd., Dexin Steel Pipe (China) Co., Ltd., Metallurgical Industry Information Standards Research Institute. The main drafters of this document are. Fu Guozhu, Zheng Yuanhong, Li Dingjie, Liu Jilin, Su Chunyang, You Hao, Wang Zheng, Ni Zhihong, Bian Shouhai, Hu Shunzhen, Zhi Xiangdong, Li Gang, Li Jingmin, Wu Feng, Fan Dingze, Wang Honghai, Li Qi, Peng Yang, Yao Yong, Yu Jiaheng, Liu Qiang, Fei Xingang, Yang Qiang, Hu Xiaojun, Cui Tao, Xia Wenbin, Niu Liang, Guo Bicheng, and Wang Tiantian. Machined seamless steel pipes for structural use 1 Scope This document specifies the ordering content, manufacturing process, technical requirements, test methods, inspection rules, packaging, Logo and quality certificate. This document applies to seamless steel tubes for machining machinery parts (hereinafter referred to as "steel tubes"). 2 Normative references The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 222 Permissible deviations of chemical composition of finished steel products GB/T 223.5 Determination of acid-soluble silicon and total silicon content of iron and steel - Reduced molybdenum silico-silicic acid spectrophotometric method GB/T 223.9 Iron, steel and alloys—Determination of aluminum content—Chrome azurol S spectrophotometric method GB/T 223.11 Determination of chromium content in steel and alloys - Visual titration or potentiometric titration method GB/T 223.14 Chemical analysis of iron, steel and alloys - Tantalum extraction spectrophotometric method for the determination of vanadium content GB/T 223.19 Methods for chemical analysis of iron, steel and alloys - Determination of copper content by the new cuproline-chloroform extraction spectrophotometric method GB/T 223.23 Iron, steel and alloys - Determination of nickel content - Dimethylglyoxime spectrophotometric method GB/T 223.26 Iron, steel and alloys—Determination of molybdenum content—Thiocyanate spectrophotometric method GB/T 223.37 Iron, steel and alloys - Determination of nitrogen content - Distillation separation of indigo blue - Classification photometric method GB/T 223.40 Iron, steel and alloys - Determination of niobium content - Chlorosulfonylphenol S spectrophotometric method GB/T 223.59 Iron, steel and alloys - Determination of phosphorus content - Bismuth phosphomolybdenum blue spectrophotometric method and antimony phosphomolybdenum blue spectrophotometric method GB/T 223.63 Iron, steel and alloys—Determination of manganese content—Sodium (potassium) periodate spectrophotometric method GB/T 223.78 Methods for chemical analysis of iron, steel and alloys - Curcumin direct photometric method for the determination of boron content GB/T 223.84 Iron, steel and alloys - Determination of titanium content - Diantipyryl methane spectrophotometric method GB/T 223.85 Iron, steel and alloys - Determination of sulfur content - Infrared absorption method after combustion in an induction furnace GB/T 223.86 Iron, steel and alloys - Determination of total carbon content - Infrared absorption method after combustion in an induction furnace GB/T 228.1 Tensile tests on metallic materials - Part 1.Room temperature test methods GB/T 229 Charpy pendulum impact test method for metallic materials GB/T 231.1 Metallic materials Brinell hardness test Part 1.Test method GB/T 699 High-quality carbon structural steel GB/T 2102 Acceptance, packaging, marking and quality certificate of steel pipes GB/T 2975 Sampling location and specimen preparation for mechanical property tests on steel and steel products GB/T 3077 Alloy Structural Steel GB/T 4336 Carbon steel and medium and low alloy steel - Determination of multi-element content - Spark discharge atomic emission spectrometry (conventional method) GB/T 5777 Full circumferential automatic ultrasonic testing of seamless and welded (except submerged arc welded) steel tubes for longitudinal and/or transverse imperfections GB/T 7735 Automatic eddy current testing of seamless and welded (except submerged arc welded) steel tubes for imperfections GB/T 10561-2023 Determination of non-metallic inclusions in steel - Microscopic examination method using a graded chart ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 45781-2025_English be delivered?

Answer: Upon your order, we will start to translate GB/T 45781-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 45781-2025_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 45781-2025_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.