GB/T 16939-2016High strength bolts for joints of space grid structures (English PDF)

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 16939-1997 "High-strength bolts for bolted ball bolts of steel grids", compared with GB/T 16939-1997, The main technical changes are as follows:

--- reference thread standard unified GB/T 193, GB/T 9145 (Chapter 2);

--- remove the M22, M33 and M52 bolt specifications;

--- increase the M68 × 4, M72 × 4, M76 × 4, M80 × 4 and M85 × 4 bolt specifications;

--- remove 35VB steel and Appendix B;

--- increase 42CrMo steel. This standard is proposed by the China Machinery Industry Federation. This standard is nationalized by the National Standardization Technical Committee on Fasteners (SAC/TC85). This standard is responsible for the drafting unit. China Machine Productivity Promotion Center. This standard participates in the drafting unit. China Metallurgical Building Research Institute Co., Ltd., machinery industry general parts product quality supervision and inspection center, National grid and steel structure product quality supervision and inspection center, Hangzhou Hualing steel structure high strength bolt Co., Ltd., Shanghai Jinma high-strength fasteners Ltd., Nantong Ansai Le Fastener Co., Ltd., Xuzhou Central Jiu Steel Structure Engineering Co., Ltd., Jiangsu brilliant steel Technology Co., Ltd., Jiangsu Europe and the United States Steel Curtain Wall Technology Co., Ltd., Zhejiang Southeast Grid Co., Ltd. This standard is interpreted by the Secretariat of the National Standardization Technical Committee for Fasteners. This standard replaced the previous version of the standard release.

--- GB/T 16939-1997. High - strength bolts for bolted ball joints in steel lathes

1 Scope

GB/T 16939-2016 is the Chinese national standard on high strength bolts for joints of space grid structures, in the field of mechanical systems and components. The /T suffix marks it as a recommended standard: it is not compulsory by itself, but it becomes binding as soon as a contract, a tender or a customer specification calls it up - which in practice is how most foreign buyers meet it. It was issued on 24 February 2016 by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of China, and has been in force since 1 June 2016. Classification: ICS 21.060.10, CCS J13. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

This standard specifies the type, technical condition, marking, mechanical properties, test method, Acceptance rules and signs and packaging. This standard is applicable to high strength bolts with screw sizes of M12 ~ M85 × 4 steel bolts.

2 Fasteners The end of the external thread part GB/T

90.1 Acceptance inspection of fasteners GB/T

90.2 Fastener Marking and Packaging Common thread diameter and pitch series GB/T Metallic materials - Tensile testing - Part 1. Test methods for room temperature GB/T

GB/T 230.1 Metallic materials - Rockwell hardness test - Part 1. Test methods (A, B, C, D, E, F, G, H, K, N, T) ruler)

GB/T 699 high quality carbon structural steel

GB/T 700 carbon structural steel

GB/T 1237 Fastener marking method

GB/T 1591 low alloy high strength structural steel

GB/T 3077 alloy structural steel

GB/T 3098.1 Fasteners - Mechanical properties - Bolts, screws and studs

GB/T 3103.1 Fasteners - Tolerances bolts, screws, studs and nuts Fasteners - Surface imperfections - Bolts, screws and studs - General requirements GB/T

GB/T 9145 ordinary thread medium precision, the preferred series of limit size

3 Size

The type of bolt is shown in Figure 1 and Table 1.