QC/T 598-2022 English PDF (QCT598-2022)

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QC/T 598-2022: Bearing face projection weld bolts
QC/T 598-2022
QC
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.040
CCS T 33
Replacing QC/T 598-1999
Bearing face projection weld bolts
承面凸焊螺栓
ISSUED ON: APRIL 08, 2022
IMPLEMENTED ON: OCTOBER 01, 2022
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 6
1 Scope ... 7
2 Normative references ... 7
3 Terms and definitions ... 8
4 Types and sizes ... 8
5 Technical conditions ... 12
6 Product number ... 12
Foreword
This document was drafted in accordance with the provisions of GB/T 1.1-2020
"Directives for standardization - Part 1: Rules for the structure and drafting of
standardizing documents".
This document replaces QC/T 598-1999 "Bolt with projection welding on the bearing
face". Compared with QC/T 598-1999, the main technical changes are as follows:
- ADD fine thread specifications (see Table 1 and Table 2);
- MODIFY α, h, K, r values, matching hole diameter accuracy (see Table 1 and Table
2);
- MODIFY the requirements on thread tolerances (see Table 3);
- ADD the nominal values of d1, d2, d3, e, f, h, K (see Table 1 and Table 2);
- ADD the requirements for plate thickness dimensions (see Table 1 and Table 2);
- ADD the grade 8.8 mechanical performance grade of Type A and Type C projection
weld bolts (see Table 3).
This document was proposed by AND shall be under the jurisdiction of the National
Automotive Standardization Technical Committee (SAC/TC 114).
Drafting organizations of this document: Automotive Engineering Research Institute of
Guangzhou Automobile Group Co., Ltd.
The main drafters of this document: Zhao Ju, Wu Kunpei, Wang Pan, Kang Xun.
This standard replaces the standard previously issued as follows:
- It was first published as QC/T 598-1999 in 1999;
- This is the first revision.
Bearing face projection weld bolts
1 Scope
This document specifies the types, dimensions, and technical conditions of bearing face
projection weld bolts for automobiles.
This document is applicable to projection welding bolts of three types of bearing face
welding joints of type A and C, which have thread specifications of M4 ~ M12/M12 x
1.25, as well type B, which has specification of M5 ~ M10/M10 x 1.25.
2 Normative references
The contents of the following documents constitute the essential provisions of this
document through normative references in the text. Among them, for dated references,
only the version corresponding to the date is applicable to this document; for undated
references, the latest version (including all amendments) is applicable to this document.
GB/T 2 Fasteners - Ends of parts with external thread
GB/T 90.1-2002 Fasteners - Acceptance inspection
GB/T 90.2-2002 Fasteners - Marking and packaging
GB/T 196 General purpose metric screw threads - Basic dimensions
GB/T 197 General purpose metric screw threads - Tolerances
GB/T 3098.1-2010 Mechanical properties of fasteners - Bolts, screws and studs
GB/T 3103.1-2002 Essential oils and aromatic extracts - Determination of residual
benzene content
GB/T 5779.1-2000 Fasteners - Surface discontinuities - Bolts, screws and studs for
general requirements
QC/T 326 Coding rules for automotive standardized parts
QC/T 625 Metallic coatings and conversion coatings for automobiles