GB/T 3098.15-2023 (GB/T3098.15-2023, GBT 3098.15-2023, GBT3098.15-2023)
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Mechanical properties of fasteners -- Stainless steel nuts
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GB/T 3098.15-2023
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Standards related to: GB/T 3098.15-2023
| Standard ID | GB/T 3098.15-2023 (GB/T3098.15-2023) | | Description (Translated English) | Mechanical properties of fasteners -- Stainless steel nuts | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J13 | | Classification of International Standard | 21.060.20 | | Word Count Estimation | 32,378 | | Date of Issue | 2023-05-23 | | Date of Implementation | 2023-12-01 | | Older Standard (superseded by this standard) | GB/T 3098.15-2014 | | Drafting Organization | China Machinery Productivity Promotion Center Co., Ltd., Shanghai Jiyoubiao Wu High Strength Fastener Co., Ltd., Fuan Aozhan Industrial Co., Ltd., Hebei Wuwei Aviation Technology Co., Ltd., Wuxi Standard Parts Factory Co., Ltd., General Parts of Machinery Industry Component Product Quality Supervision and Testing Center | | Administrative Organization | National Fastener Standardization Technical Committee (SAC/TC 85) | | Proposing organization | China Machinery Industry Federation | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Management Committee | GB/T 3098:15-2023
ICS21:060:20
CCSJ13
National Standards of People's Republic of China
Replacing GB/T 3098:15-2014
Mechanical properties of fasteners Stainless steel nuts
property classes, MOD)
Released on 2023-05-23
2023-12-01 implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
table of contents
Preface I
Introduction III
1 Range 1
2 Normative references 1
3 Terms and Definitions 2
4 symbols 3
5 Marking System 3
5:1 Nut type mark 3
5:2 Marking system for stainless steel groups and performance grades 3
6 Design of bolt and nut joints 5
7 Material 5
7:1 Chemical composition 5
7:2 Heat treatment of martensitic stainless steel nuts 7
7:3 Surface finishing 7
7:4 Corrosion resistance 7
8 Mechanical and physical properties 7
9 Check 12
9:1 Manufacturer inspection 12
9:2 Supplier inspection 12
9:3 Purchaser inspection 12
9:4 Delivery of test results 13
10 Test method 13
10:1 Proof load test 13
10:2 Hardness test 16
11 Nut marks and labels 17
11:1 Sign 17
11:2 Manufacturer identification mark 18
11:3 Nut marking 18
11:4 Packaging marks (labels) 20
Appendix A (Informative) Design Principles for Stainless Steel Nuts 21
Appendix B (Normative) Proof Load Test Mandrel Thread Size 23
Reference 25
foreword
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:
This document is part 15 of GB/T 3098 "Mechanical Properties of Fasteners": GB/T 3098 has issued 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 self-tapping screws;
---GB/T 3098:6 Mechanical properties of fasteners Stainless steel bolts, screws and studs;
---GB/T 3098:7 Mechanical properties of fasteners Self-extruding screws;
---GB/T 3098:8 Mechanical properties of fasteners - bolted parts used at:200 ° C ~ 700 ° C;
---GB/T 3098:9 Mechanical properties of fasteners Effective torque profile steel lock 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 Self-drilling and self-tapping screws;
---GB/T 3098:12 Mechanical properties of fasteners Nut cone proof load test;
---GB/T 3098:13 Mechanical properties of fasteners Torque test and failure torque of bolts and screws Nominal diameter 1~10mm;
---GB/T 3098:14 Mechanical properties of fasteners Nut reaming test;
---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 Preload test parallel bearing surface method for checking hydrogen embrittlement of fasteners;
---GB/T 3098:18 Blind rivet test method for mechanical properties of fasteners;
---GB/T 3098:19 mechanical properties of fasteners blind rivets;
---GB/T 3098:20 mechanical properties of fasteners, guaranteed torque of wing nuts;
---GB/T 3098:21 Mechanical properties of fasteners Stainless steel self-tapping screws;
---GB/T 3098:22 Mechanical properties of fasteners Fine-grained non-quenched and tempered 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 alloy bolts, screws, studs and nuts for high temperature;
---GB/T 3098:25 Mechanical properties of fasteners Selection guide for stainless steel and nickel alloy fasteners;
---GB/T 3098:26 Mechanical properties of fasteners Flat washers:
This document replaces GB/T 3098:15-2014 "Mechanical Properties of Fasteners Stainless Steel Nuts", and is consistent with GB/T 3098:15-2014
In addition to structural adjustments and editorial changes, the main technical changes are as follows:
a) Nut type information has been added (see 5:1);
b) Added duplex (austenitic-ferritic) stainless steels with property classes 70, 80 and 100 (see Figure 1);
c) Added austenitic stainless steel property grade 100 and group A8 (see Figure 1);
d) Added the design of stainless steel bolt and nut assemblies (see Chapter 6) and the design principles of stainless steel nuts (see Appendix A);
e) The surface finish has been changed (see 7:3, 4:3 of the:2014 edition);
f) The calculation value of nut proof load and the principle of numerical rounding are added (see Table 5~Table 8);
g) Increased inspection program requirements and guidance (see Chapter 9);
h) The thread size requirements for mandrels for proof load tests on nuts have been added (see Appendix B);
i) The proof load and hardness test methods have been changed (see Chapter 10, Chapter 7 of the:2014 edition);
j) The nut mark and label have been changed, and the mark method for thin nuts with reduced bearing capacity has been added (see Chapter 11, 4:2 of the:2014 edition);
k) Deleted the appendices common to the series of standards on the mechanical properties of stainless steel fasteners (see appendix A to appendix E of the:2014 edition):
This document is modified to adopt ISO 3506-2:2020 "Mechanical properties of corrosion-resistant stainless steel fasteners for fasteners - Part 2: Specified groups
and Performance Class Nuts:
Compared with ISO 3506-2:2020, this document has made the following structural adjustments:
---10:2:2:1, 10:2:2:2, 10:2:2:3 correspond to 10:2:2 in ISO 3506-2:2020;
--- Added Figure 4, Figure 5 corresponds to Figure 4 in ISO 3506-2:2020, Figure 6 corresponds to Figure 5 in ISO 3506-2:2020, Figure 7
Figure 6 in ISO 3506-2:2020, Figure 8 corresponds to Figure 7 in ISO 3506-2:2020, Figure 9 corresponds to ISO 3506-2:
Figure 8 in 2020:
The technical differences between this document and ISO 3506-2:2020 and their reasons are as follows:
--- Replaced ISO 3506-6 with the normatively quoted GB/T 3098:25 to adapt to the technical conditions of our country (see 7:1);
--- Replaced ISO 16228 with the normatively quoted GB/T 39310 to adapt to the technical conditions of our country (see 9:4);
--- Replaced ISO 7500-1 with the normatively quoted GB/T 16825:1 to adapt to the technical conditions of our country (see 10:1:3);
--- Replaced ISO 6892-1 with the normatively quoted GB/T 228:1 to adapt to the technical conditions of our country (see 10:1:5);
--- Replaced ISO 898-1 with the normatively quoted GB/T 3098:1 to adapt to the technical conditions of our country (see 10:1:6);
--- Replaced ISO 6507-1 with the normatively quoted GB/T 4340:1 to adapt to the technical conditions of our country (see 10:2:2:1);
--- Replaced ISO 6508-1 with the normatively quoted GB/T 230:1 to adapt to the technical conditions of our country (see 10:2:2:1);
--- Replaced ISO 6506-1 with the normatively quoted GB/T 231:1 to adapt to the technical conditions of our country (see 10:2:2:1);
--- Replaced ISO 1891-4 with the normatively quoted GB/T 3099:4 to adapt to my country's technical conditions (see 11:4);
---Deleted the state "soft" of fasteners of austenitic stainless steel property grade 70, in line with the processing state of austenitic stainless steel fasteners
(see picture 1):
The following editorial changes were made to this document:
---Change the name of the standard to "Mechanical Properties of Fasteners Stainless Steel Nuts";
---Replace the international documents cited for information with Chinese documents;
---Change "Stainless steel group mark (first part) consists of one letter" to "Stainless steel group mark (first part) consists of
A letter and a number" (see 5:2:2);
--- After calculation according to tolerance class D11, the maximum and minimum values of the fixture aperture corresponding to M5 and M6 have been changed (see Table 9):
Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents:
This document is proposed by China Machinery Industry Federation:
This document is under the jurisdiction of the National Fastener Standardization Technical Committee (SAC/TC85):
This document was drafted by: China Machinery Productivity Promotion Center Co:, Ltd:, Shanghai Jiyoubiaowu High Strength Fastener Co:, Ltd:, Fuan Aozhan
Industrial Co:, Ltd:, Hebei Wuwei Avionics Technology Co:, Ltd:, Wuxi Standard Parts Factory Co:, Ltd:, general parts and components for machinery industry
Quality Supervision and Testing Center:
This document is interpreted by the National Fastener Standardization Technical Committee:
The release status of previous versions of this document and the documents it replaces are as follows:
---This document was first published as GB/T 3098:15-1986 in 1986, revised for the first time in:2000, and revised for the second time in:2014;
--- This is the third revision:
introduction
GB/T 3098 "Mechanical Properties of Fasteners" stipulates the mechanical properties of different types of fasteners respectively:
It provides the basis for manufacturing, acceptance inspection and use, and is proposed to be composed of 29 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 self-tapping screws;
---GB/T 3098:6 Mechanical properties of fasteners Stainless steel bolts, screws and studs;
---GB/T 3098:7 Mechanical properties of fasteners Self-extruding screws;
---GB/T 3098:8 Mechanical properties of fasteners - bolted parts used at:200 ° C ~ 700 ° C;
---GB/T 3098:9 Mechanical properties of fasteners Effective torque profile steel lock 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 Self-drilling and self-tapping screws;
---GB/T 3098:12 Mechanical properties of fasteners Nut cone proof load test;
---GB/T 3098:13 Mechanical properties of fasteners Torque test and failure torque of bolts and screws Nominal diameter 1~10mm;
---GB/T 3098:14 Mechanical properties of fasteners Nut reaming test;
---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 Preload test parallel bearing surface method for checking hydrogen embrittlement of fasteners;
---GB/T 3098:18 Blind rivet test method for mechanical properties of fasteners;
---GB/T 3098:19 mechanical properties of fasteners blind rivets;
---GB/T 3098:20 mechanical properties of fasteners, guaranteed torque of wing nuts;
---GB/T 3098:21 Mechanical properties of fasteners Stainless steel self-tapping screws;
---GB/T 3098:22 Mechanical properties of fasteners Fine-grained non-quenched and tempered 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 alloy bolts, screws, studs and nuts for high temperature;
---GB/T 3098:25 Mechanical properties of fasteners Selection guide for stainless steel and nickel alloy fasteners;
---GB/T 3098:26 Mechanical properties of fasteners, flat washers;
---GB/T 3098:27 Mechanical properties of fasteners Weathering steel fasteners;
---GB/T 3098:28 Mechanical properties of fasteners Stainless steel flat washers;
---GB/T 3098:29 Mechanical properties of fasteners M42~M100 nuts:
GB/T 3098 has been transformed into ISO 898 series carbon steel and alloy steel fastener mechanical properties, ISO 3506 series stainless steel fastener mechanical properties
Performance, as well as self-tapping screws, self-extruding screws, effective moment steel lock nuts, non-ferrous metal fasteners, self-drilling and self-tapping screws and other mechanical properties
International standards; independently formulated mechanical performance standards for blind rivets, fine-grained non-quenched and tempered steel fasteners, and M42~M72 external thread fasteners; incorporated into
Test methods such as nut reaming test, parallel bearing surface method for checking hydrogen embrittlement, preload test, blind rivet test method, wing nut guaranteed torque, etc:
legal standards: Incorporate the mechanical performance standards and related test method standards of various materials and various types of products into the GB/T 3098 series to facilitate
for use:
The properties of stainless steel fasteners are determined by the chemical composition of the material (especially corrosion resistance) and the mechanical properties resulting from the manufacturing process:
Ferritic, austenitic and duplex (austenitic-ferritic) stainless steel fasteners fabricated by work hardening compared to quenched and tempered fasteners
Does not have uniform local material properties:
Austenitic-ferritic stainless steels are called duplex stainless steels and were originally invented in the 1930s: The standard duplex stainless steel used today
Steel groups were developed in the 1980s: Fasteners made of duplex stainless steel have been widely used: After this document has been revised, the
It is stipulated:
Compared with commonly used A1~A5 austenitic stainless steels, the stress corrosion cracking resistance of duplex stainless steels has been improved: most bipolar
Stainless steel also has high pitting resistance, of which D2 is at least equivalent to A2, and D4 is at least equivalent to A4:
See GB/T 3098:25 for supplementary details on the definition of stainless steel groups and properties:
Mechanical properties of fasteners Stainless steel nuts
1 Scope
This document specifies the coarse thread and fine thread nuts made of corrosion-resistant stainless steel, at an ambient temperature of 10 ℃ ~ 35 ℃
Mechanical and physical properties when tested: Specifies nut groups compatible with austenitic, martensitic, ferritic and duplex (austenitic-ferritic) stainless steels
Do not correspond to the performance level:
GB/T 3098:25 provides general rules and additional technical information on applicable stainless steels and their properties:
Nuts meeting the requirements of this document are tested at an ambient temperature of 10°C to 35°C: At high and/or low temperatures, the nut may
Failure to maintain specified mechanical and physical properties:
Note 1: The operating temperature of fasteners meeting the requirements of this document is -20 ℃ ~ 150 ℃, but it can also be used at low temperature to -196 ℃ and high temperature to
300°C, see GB/T 3098:25 for more detailed information:
When used outside the temperature range of -20°C~150°C, the user is responsible for consulting experienced fastener material experts and considering stainless steel
Steel composition, service time at high or low temperature, the effect of temperature on the mechanical properties of fasteners and the clamped parts, and the corrosion of bolted connections
environment to determine the appropriate selection for a particular application:
Note 2: GB/T 3098:24 gives the selection of appropriate stainless steel groups and performance grades when the service temperature is as high as 800 °C:
Nuts to which this document applies:
---Ordinary thread in accordance with GB/T 192;
--- Diameter and pitch combination specified in GB/T 193 and GB/T 9144;
---Coarse thread M5~M39, fine thread M8×1~M39×3;
---Thread tolerance complies with GB/T 197 and GB/T 9145;
--- Specified performance level and guaranteed load;
---Thin nut, standard nut and high nut three nut types;
---Nut height mmin≥0:45D;
--- Outer diameter or width across sides smin≥1:45D (see Appendix A);
---Any shape;
---It can be used in conjunction with bolts, screws and studs that meet the performance grades specified in GB/T 3098:6:
Stainless steel groups and property classes may be used beyond those specified in this document when all applicable chemical composition, mechanical and physical property specifications are met:
The specification range specified by the parts (that is, D< 5mm or D > 39mm):
This document does not specify the following performance requirements:
---Torque-clamping force performance;
---Effective torque performance;
--- Solderability:
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text: where dated references
For documents, only the version corresponding to the date applies to this document; for undated reference documents, the latest version (including all amendments) applies to
this document:
GB/T 228:1 Tensile tests on metallic materials - Part 1: Test methods at room temperature (GB/T 228:1-2021, ISO 6892-1:
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