ISO 3506-4:2009

Name: ISO 3506-4:2009 — Mechanical properties of corrosion-resistant stainless steel fasteners — Part 4: Tapping screws
SKU: ISO 3506-4:2009
Price: 30600 RUB
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Mechanical properties of corrosion-resistant stainless steel fasteners — Part 4: Tapping screws

Название (английский):

ISO 3506-4:2009

Mechanical properties of corrosion-resistant stainless steel fasteners — Part 4: Tapping screws

Статус документа:: Отменён
Формат:: Электронный (PDF)
Количество страниц:: 17
Дата публикации:: 29 октября 2009 г.
Издание:: ISO IS 3506 edition 2 version 1
ICS:: 21.060.10

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Описание (английский):

ISO 3506-4:2009 specifies the mechanical properties of tapping screws made of austenitic, martensitic and ferritic steel grades of corrosion-resistant stainless steels, when tested over an ambient temperature range of 10 °C to 35 °C. Properties vary at higher or lower temperatures. It applies to tapping screws with threads from ST2,2 up to and including ST8, in accordance with ISO 1478. It does not apply to screws with special properties such as weldability.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 3506-4:2009 specifies the mechanical properties of corrosion-resistant stainless steel tapping screws (tapping screws = thread-forming screws) made from austenitic, martensitic and ferritic stainless steels. The standard covers tapping screws with thread sizes ST2.2 up to and including ST8 (per ISO 1478) and applies to tests performed at ambient temperatures between 10 °C and 35 °C (properties can vary outside this range). ISO 3506-4 is Part 4 of the ISO 3506 series on stainless steel fasteners.

Key Topics

Scope and applicability: Tapping screws (thread-forming) manufactured from A, C, F steel groups; excludes screws with special properties (e.g., weldability).

Designation system: Material-grade and hardness-class designation (e.g., A4-25H). Low‑carbon variants may be marked with “L”; passivated screws with “P”.

Hardness classes: Defined hardness classes (20H, 25H, 30H, 40H) with minimum Vickers hardness values (HV min. 200, 250, 300, 400).

Chemical composition: Allowed chemical ranges for grades A2, A3, A4, A5 (austenitic), C1, C3 (martensitic), and F1 (ferritic) are listed (see Table 2 in the standard).

Mechanical performance requirements: Surface hardness (martensitic), core hardness (austenitic/ferritic), torsional strength, and thread-forming capability.

Test methods: Vickers hardness testing (ISO 6507-1), torsional and drive tests, and procedures for acceptance testing.

Marking and packaging: Manufacturer identification, optional part marking, and mandatory package labelling (including lot number and grade/hardness symbol).

Finish and corrosion treatment: Screws supplied clean and bright; passivation recommended/per ISO 16048 for improved corrosion resistance.

Informative annexes: Steel group descriptions, cold-heading materials, chloride-resistance guidance, intergranular corrosion vs. carbon content, and magnetic properties after cold working.

Applications

Specification and quality control for tapped fastener production and procurement.

Design and engineering guidance where stainless steel tapping screws are used to form threads in materials such as aluminum or thin sheet without thread deformation or breakage.

Use by fastener manufacturers, OEMs, procurement/specification engineers, test laboratories, and quality assurance teams in industries like construction, automotive, electronics, marine and machinery where corrosion resistance and assembly performance are critical.

Related standards

ISO 1478 (tapping screw threads)

ISO 16048 (passivation of stainless-steel fasteners)

ISO 3651‑1 / ISO 3651‑2 (intergranular corrosion tests)

ISO 6507‑1 (Vickers hardness test)

ISO 16426 (fastener quality assurance)

Other parts of ISO 3506 (Parts 1–3 for bolts, nuts, set screws)

Keywords: ISO 3506-4, tapping screws, stainless steel fasteners, mechanical properties, Vickers hardness, thread forming, passivation, austenitic martensitic ferritic.

ISO 3506-4:2009

Abstract

Похожие стандарты

Overview

Key Topics

Applications

Related standards

Технические детали

BS EN ISO 1478:2000

Tapping screw thread.

BS EN ISO 3506-4:2009

Mechanical properties of corrosion-resistant stainless steel fasteners - Tapping screws

BS EN ISO 3506-3:2025

Fasteners. Mechanical properties of corrosion resistant stainless steel fasteners. Set screws (and similar fa…

ISO 6507-1:2023

Metallic materials — Vickers hardness test — Part 1: Test method

ISO 16048:2003

Passivation of corrosion-resistant stainless-steel fasteners

ISO 3651-1:1976

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ISO 3651-2:1998

Determination of resistance to intergranular corrosion of stainless steels — Part 2: Ferritic,austenitic and…