ISO 3506-2-2020

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Fasteners — Mechanical properties

of corrosion-resistant stainless steel

fasteners —

Part 2:



property classes

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

inoxydable résistant à la corrosion —

Partie2:Écrousdegradesetclassesdequalitéspécifiés

INTERNATIONAL

STANDARD

ISO

3506-2

Third edition

2020-04

Reference number

ISO 3506-2:2020(E)

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

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

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

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



CP 401 • Ch. de Blandonnet 8



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



Website: www.iso.org

Published in Switzerland

ISO 3506-2:2020(E)

 ..........................................................................................................................................................................................................................................v

 .............................................................................................................................................................................................................................. vii

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

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

  ..................................................................................................................................................................................... 2

4 Symbols .......................................................................................................................................................................................................................... 3

  ......................................................................................................................................................................................... 4

  ................................................................................................................................................................ 4

  ........................................................ 4

 ...................................................................................................................................................................................... 4

  .............................................................................. 5

 

 ................................................................................................................................................ 6

  ........................... 6

  ...................................................................................................................................................... 6

7 Materials ....................................................................................................................................................................................................................... 7

7.1 Chemical composition ...................................................................................................................................................................... 7

7.2 Heat treatment for martensitic stainless steel nuts ................................................................................................ 8

7.3 Finish ............................................................................................................................................................................................................... 9

7.4 Corrosion resistance .......................................................................................................................................................................... 9

  ................................................................................................................................................ 9

9 Inspection .................................................................................................................................................................................................................14

9.1 Manufacturer’s inspection ......................................................................................................................................................... 14

9.2 Supplier’s inspection ...................................................................................................................................................................... 14

9.3 Purchaser’s inspection .................................................................................................................................................................. 15

  ...................................................................................................................................................................15

  ..........................................................................................................................................................................................................15

10.1 Proof load test ....................................................................................................................................................................................... 15

 ................................................................................................................................................................................... 15

  ...................................................................................................................................................................... 15

10.1.3 Apparatus ............................................................................................................................................................................15

10.1.4 Testing device .................................................................................................................................................................. 15

10.1.5 Test procedure ................................................................................................................................................................ 17

  ................................................................. 17

  ..........................................................................................................................17

10.2 Hardness test ......................................................................................................................................................................................... 18

 ................................................................................................................................................................................... 18

10.2.2 Test procedure ................................................................................................................................................................ 18

  ..........................................................................................................................19

  ....................................................................................................................................................................... 19

  ............................................................................................................................................................................................ 19

  ...............................................................................................................19

  .19

  .................... 20

  .....................................................................................................................................................20

  ................................................................................................................................... 20

  ......................................................................................................................................................................... 20

  ...................................................................... .............................................................................................. 20

  ...................................................................................................................................................... 22

  .....................................................................................................................................22

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标签： #ISO

摘要：

ISO 3506-2-2020是关于不锈钢紧固件机械性能的国际标准，具体规定了在-200℃至+300℃温度范围内使用的奥氏体、马氏体和铁素体不锈钢螺母的机械性能要求、试验方法及标记方式。该标准替代了旧版ISO 3506-2:2009，是设计和采购高强度不锈钢螺母时的重要技术依据。本标准涵盖了从A1到A5、C1到C4以及F1等不同不锈钢等级螺母的保证载荷、硬度、螺纹力矩等关键性能参数，适用于石油化工、海洋工程、食品机械及医疗设备等对耐腐蚀和耐高温性能有严格要求的行业。掌握ISO 3506-2-20

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ISO 3506-2-2020

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