ISO 3506-5-2022

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Fasteners — Mechanical properties

of corrosion-resistant stainless steel

fasteners —

Part 5:

Special fasteners (also including

fasteners from nickel alloys) for high

temperature applications

Fixations—Caractéristiquesmécaniquesdesfixationsenacier

inoxydable résistant à la corrosion —

Partie5:Fixationsspéciales(incluantégalementlesfixationsen

alliages de nickel) pour utilisation à hautes températures

INTERNATIONAL

STANDARD

ISO

3506-5

First edition

2022-04

Reference number

ISO 3506-5:2022(E)











CP 401 • Ch. de Blandonnet 8



Phone: +41 22 749 01 11



Website: www.iso.org

Published in Switzerland

ISO 3506-5:2022(E)

Foreword ..........................................................................................................................................................................................................................................v

Introduction .............................................................................................................................................................................................................................. vi

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ..................................................................................................................................................................................... 2

3 Termsanddefinitions .................................................................................................................................................................................... 2

4 Symbols .......................................................................................................................................................................................................................... 4

5 Designation system for fasteners made from stainless steels and nickel alloys ............................ 5

6 Materials and manufacture ...................................................................................................................................................................... 5

6.1 Chemical composition ...................................................................................................................................................................... 5

6.2 Heat treatment for fasteners ...................................................................................................................................................... 7

6.3 Finish ...................................................................... ......................................................................................................................................... 8

6.4 Design of bolt/nut assemblies ........................................................................................................................................... ........ 9

6.5 Service temperatures for fasteners .................................................................................................................................. 10

7 Mechanical and physical properties ............................................................................................................................................ 10

  ............................................................................................... 10

7.2 Mechanical properties of nuts ............................................................................................................................................... 14

8 Applicability of test methods and inspection ....................................................................................................................15

  .................................................................................................................................................. 15

8.2 Manufacturer’s inspection ........................................................................................................................................................ 16

8.3 Supplier’s inspection ...................................................................................................................................................................... 16

8.4 Purchaser’s inspection ................................................................................................................................................................. 16

  ................................................................................................................................................................. 16

9 Test methods at ambient temperature......................................................................................................................................17

  .......................................................... 17

  ..................................................................................................................................................................................... 17

  ........................................................................................................................................................................ 17

9.1.3 Apparatus and testing device .............................................................................................................................. 17

  .............................................................................................................................................. 18

9.1.5 Test procedure for the simultaneous determination of RmfRpfA .......................... 19

            

Rpf .................................................................................................................................. 20

 A ................................... 21

 Rmf ................................... ........................... 22

          

Rpf .................................................................................................................................................................... 23

 A ............................................ 23

  .................................................................................................................. 23

  ..................................................................................................................................................................................... 23

9.2.2 Test procedure................................................................................................................................................................... 23

  .......................................................................................... 24

9.3 Proof load test for nuts ................................................................................................................................................................. 24

  ..................................................................................................................................................................................... 24

  ........................................................................................................................................................................ 24

9.3.3 Apparatus and testing device .............................................................................................................................. 24

9.3.4 Test procedure................................................................................................................................................................... 25

  ............................................................ 26

  .............................................................................. 27

9.4 Hardness test for nuts ........................................................................................................................................... ........................27

  ..................................................................................................................................................................................... 27

9.4.2 Test procedure................................................................................................................................................................... 27

  ................................................................................ 28

iii

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标签： #ISO

摘要：

ISO 3506-5-2022 是关于耐腐蚀不锈钢紧固件机械性能的最新国际标准，主要针对奥氏体、马氏体、铁素体及双相不锈钢制造的螺栓、螺钉和螺柱的测试要求与判定规则进行了详细规范。该标准替代了部分旧版 ISO 3506 系列内容，并补充了针对高温环境、低温韧性及抗应力腐蚀开裂性能的评估方法。在工程选型、质量认证与出口贸易中，ISO 3506-5-2022 是确保紧固件在化工、海洋工程及食品设备中安全可靠运行的关键依据。掌握该标准的技术参数与试验流程，有助于提升产品的合规性与市场竞争力。

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