GB/T 3098.6-2023 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 3098.6-2023 | English | 650 |
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Mechanical properties of fasteners - Stainless steel bolts, screws and studs
| Valid |
| GB/T 3098.6-2014 | English | 1199 |
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Mechanical properties of fasteners -- Stainless steel Bolts, screws and studs
| Obsolete |
| GB/T 3098.6-2000 | English | 919 |
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Mechanical properties of fasteners stainless steel bolts, screws and studs
| Obsolete |
| GB 3098.6-1986 | English | 519 |
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Mechanical properties of fasteners--Stainless steel bolts, screws, studs and nuts
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GB/T 3098.6-2023: Mechanical properties of fasteners - Stainless steel bolts, screws and studs---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/GBT3098.6-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 21.060.10
CCS J 13
Replacing GB/T 3098.6-2014
Mechanical properties of fasteners - Stainless steel bolts,
screws and studs
(ISO 3506-1.2020, Fasteners - Mechanical properties of corrosion-resistant stainless
steel fasteners - Part 1.Bolts, screws and studs with specified grades and performance
classes, MOD)
Issued on. MAY 23, 2023
Implemented on. DECEMBER 01, 2023
Issued by. State Administration for Market Regulation;
National Standardization Administration.
Table of Contents
Foreword... 4
Introduction... 8
1 Scope... 11
2 Normative references... 12
3 Terms and definitions... 13
4 Symbols... 14
5 Stainless steel group and performance grade marking system... 16
5.1 General... 16
5.2 Stainless steel group marking (part 1)... 17
5.3 Marking of performance grade (part 2)... 17
6 Materials... 18
6.1 Chemical composition... 18
6.2 Heat treatment of martensitic stainless steel fasteners... 21
6.3 Surface finishing... 21
6.4 Corrosion resistance... 21
7 Mechanical and physical properties... 22
8 Applicability of test methods and inspections... 28
8.1 Applicability of test methods... 28
8.2 Load-bearing capacity of fasteners... 28
8.3 Manufacturer's inspection... 30
8.4 Supplier inspection... 30
8.5 Buyer inspection... 31
8.6 Delivery of test results... 31
9 Test method... 31
9.1 Tensile test... 31
9.2 Tensile test of bolts and screws with reduced load capacity due to head design... 39
9.3 Tensile test of bolts, screws, studs with reduced load capacity due to shank design. 40
9.4 Wedge load test... 41
9.5 Torque test... 43
9.6 Hardness test... 45
10 Marking and labeling of fasteners... 46
10.1 Marking... 46
10.2 Manufacturer's identification mark... 48
10.3 Fastener marking... 48
10.4 Packaging marking (label)... 52
Appendix A (Informative) Mechanical properties at high temperatures and application
at low temperatures... 54
References... 56
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 is Part 6 of GB/T 3098 "Mechanical properties of fasteners". GB/T 3098
has published the following parts.
- GB/T 3098.1 Mechanical properties of fasteners - Bolts, screws and studs;
- GB/T 3098.2 Mechanical properties of fasteners - Nuts;
- GB/T 3098.3 Mechanical properties of fasteners - Set screws;
- GB/T 3098.5 Mechanical properties of fasteners - Tapping screws;
- GB/T 3098.6 Mechanical properties of fasteners - Stainless steel bolts, screws and
studs;
- GB/T 3098.7 Mechanical properties of fasteners - Thread rolling screws;
- GB/T 3098.8 Mechanical properties of fasteners - Parts for bolted connections for
use at temperatures from-200 °C ~ +700 °C
- GB/T 3098.9 Mechanical properties of fasteners - Prevailing torque type steel nuts;
- GB/T 3098.10 Mechanical properties of fasteners - Bolts, screws, studs and nuts
made of non-ferrous metals;
- GB/T 3098.11 Mechanical properties of fasteners - Drilling screws with taping
screw thread;
- GB/T 3098.12 Mechanical properties of fasteners - Cone proof load test on nuts;
- GB/T 3098.13 Mechanical properties of fasteners - Torsional test and minimum
torques for bolts and screws with nominal diameters 1 mm to 10 mm;
- GB/T 3098.14 Mechanical properties of fasteners - Widening test on nuts;
- GB/T 3098.15 Mechanical properties of fasteners - Stainless steel nuts;
- GB/T 3098.16 Mechanical properties of fasteners - Stainless steel set screws;
- GB/T 3098.17 Mechanical properties of fasteners - Preloading test for the detection
of hydrogen embrittlement-Parallel bearing surface method;
- GB/T 3098.18 Mechanical properties of fasteners - Blind rivets testing;
- GB/T 3098.19 Mechanical properties of fasteners - Blind rivets with break pull
mandrel;
- GB/T 3098.20 Mechanical properties of fasteners - Wing nuts with specified proof
torque;
- GB/T 3098.21 Mechanical properties of fasteners - Stainless steel tapping screws;
- GB/T 3098.22 Mechanical properties of fasteners made of the fine grain non-heat
treatment steel - Bolts, screws and studs;
- GB/T 3098.23 Mechanical properties of fasteners - M42 ~ M72 bolts, screws and
studs;
- GB/T 3098.24 Mechanical properties of fasteners - Stainless steel and nickel alloys
bolts, screws, studs and nuts for high temperature applications;
- GB/T 3098.25 Mechanical properties of fasteners - Guidance for the selection of
stainless steels and nickel alloys for fasteners;
- GB/T 3098.26 Mechanical properties of fasteners - Flat washers.
This document replaces GB/T 3098.6-2014 "Mechanical properties of fasteners -
Stainless steel bolts, screws and studs". Compared with GB/T 3098.6-2014, in addition
to structural adjustments and editorial changes, the main technical changes are as
follows.
a) ADD duplex (austenite-ferrite) stainless steel with performance grades of 70, 80,
100 (see Figure 1);
b) ADD the austenitic stainless steel performance grade 100 and group A8 (see
Figure 1);
c) CHANGE the surface finishing (see 6.3; Chapter 4 of the 2014 edition);
d) ADD the stainless steel bolt and nut group matching (see 6.4);
e) ADD the minimum tensile load and minimum load calculation value when the
specified plastic elongation is 0.2%, as well as the principle of numerical
rounding (see Table 4 ~ Table 7);
f) ADD the fasteners with reduced bearing capacity due to head structure or rod
structure (see 8.2);
g) ADD the inspection procedure requirements and guidance (see 8.3 ~ 8.6);
h) ADD the applicability of full load capacity and reduced load capacity test methods
(see Chapter 8);
i) CHANGE the tensile strength test procedure (see 9.1; 7.2 of the 2014 edition);
ADD reduced load capacity test method (see 9.2 and 9.3);
j) CHANGE the wedge load test (see 9.4; 7.2 of the 2014 edition) and hardness test
(see 9.6; 7.2 of the 2014 edition);
k) CHANGE the marking and labeling; ADD the reduced load capacity fastener
marking method (see Chapter 10; Chapter 4 of the 2014 edition);
l) CHANGE the mechanical properties at high temperature and application at low
temperature (see Appendix A; Appendix F of the 2014 edition);
m) DELETE the common appendixes in the series of mechanical properties
standards for stainless steel fasteners (see Appendix B ~ Appendix E; Appendix
G, Appendix H of the 2014 edition).
This document modifies and adopts ISO 3506-1.2020 "Fasteners - Mechanical
properties of corrosion-resistant stainless steel fasteners - Part 1.Bolts, screws and studs
with specified grades and performance grades".
The technical differences between this document and ISO 3506-1.2020, as well as their
reasons, are as follows.
- USE the normative reference GB/T 3098.25 to replace ISO 3506-6, to adapt to
China's technical conditions (see 6.1);
- USE the normative reference GB/T 39310 to replace ISO 16228, to adapt to China's
technical conditions (see 8.6);
- USE the normative reference GB/T 16825.1 to replace ISO 7500-1, to adapt to
China's technical conditions (see 9.1.1);
- USE the normative reference GB/T 228.1 to replace ISO 6892-1, to adapt to China's
technical conditions (see 9.1.1, 9.1.2, 9.4.2);
- USE the normative reference GB/T 12160 to replace ISO 9513, to adapt to China's
technical conditions (see 9.1.3);
- USE the normative reference GB/T 230.1 to replace ISO 6508-1, to adapt to China's
technical conditions (see 9.6.2);
- USE the normative reference GB/T 231.1 to replace ISO 6506-1, to adapt to China's
technical conditions (see 9.6.2);
- USE the normative reference GB/T 4340.1 to replace ISO 6507-1, to adapt to
China's technical conditions (see 9.6.2);
- USE the normative reference GB/T 3099.4 to replace ISO 1891-4, to adapt to
China's technical conditions (see 10.4);
- DELETE the "soft" state of austenitic stainless steel performance grade 70 fasteners,
to conform to the actual state of austenitic stainless steel fasteners (see Figure 1).
The following editorial changes have been made to this document.
- CHANGE the name of the standard to "Mechanical properties of fasteners -
Stainless steel bolts, screws and studs";
- USE the Chinese document to replace the international documents of informative
reference;
- CHANGE that "Stainless steel group marking (Part 1) consists of one letter..." into
that. "Stainless steel group marking (Part 1) consists of one letter and one
number..." (see 5.2).
Please note that some contents of this document may involve patents. The issuing
agency of this document does not assume the responsibility for identifying patents.
This document was proposed by the China Machinery Industry Federation.
This document shall be under the jurisdiction of the National Technical Committee for
Standardization of Fasteners (SAC/TC 85).
Drafting organizations of this document. China Machinery Productivity Promotion
Center Co., Ltd., Hebei Wuwei Avionics Technology Co., Ltd., Shanghai Jiyoubiaowu
High Strength Fastener Co., Ltd., Zhoushan 7412 Factory, Wuxi Standard Parts Factory
Co., Ltd., Suzhou Thermal Engineering Research Institute Co., Ltd., Hunan Shenyi
Machinery Application Research Institute Co., Ltd., Machinery Industry General Parts
Product Quality Supervision and Inspection Center, Zhejiang Ancheng Metal Products
Co., Ltd., Shandong Lugui Fastener Co., Ltd.
This document is interpreted by the National Technical Committee for Standardization
of Fasteners.
This standard replaces the standard previously issued as follows.
- This document was first published in 1986.It was revised for the first time in 2000.
It was revised for the second time in 2014;
- This is the third revision.
1 Scope
This document specifies the mechanical and physical properties of coarse and fine
thread bolts, screws and studs (hereinafter referred to as fasteners) made of corrosion-
resistant stainless steel, when tested at an ambient temperature of 10 °C ~ 35 °C. The
performance grades corresponding to the groups of austenitic, martensitic, ferritic,
duplex (austenitic-ferritic) stainless steel fasteners are specified.
2 Normative references
The contents of the following documents constitute the essential terms of this document
through normative references in the text. Among them, for dated references, only the
version corresponding to that date applies to this document; for undated references, the
latest version (including all amendments) applies to this document.
3 Terms and definitions
The following terms and definitions apply to this document.
Steel which has stainless steel and corrosion resistance as main characteristics, a
chromium (Cr) content of at least 10.5% (mass fraction) and carbon (C) content of
no more than 1.2% (mass fraction).
4 Symbols
The following symbols apply to this document.
5 Stainless steel group and performance grade marking system
The marking of performance grade (part 2) consists of 2 ~ 3 digits corresponding to
1/10 of the minimum tensile strength of the fastener specified in Table 2 or Table 3.
6 Materials
Unless otherwise specified, fasteners that meet this document shall be cleaned and
polished.
To prevent corrosion, bolts, screws and studs should be used with nuts and washers of
the same stainless steel group (e.g. A2 nuts and A2 bolts). Other combinations may be
used (e.g. A4 nuts and D4 bolts), provided that.
7 Mechanical and physical properties
Bolts, screws, studs of specified stainless steel groups and performance grades shall
comply with all applicable requirements specified in Tables 2 ~ 8, when tested in
accordance with the methods specified in Chapter 9, at ambient temperatures of 10 °C
~ 35 °C, either during the manufacturing process or at the time of final inspection of
the finished product.
8 Applicability of test methods and inspections
Standardized or non-standardized, full-load-bearing capacity stainless steel bolts,
screws or studs, when subjected to tension testing until fracture.
The buyer may control and/or test the delivered fasteners according to the test methods
specified in Chapter 9.
9 Test method
This test is used to determine the following parameters simultaneously or separately.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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