EN ISO 7539-2:1995 PDF

Name: EN ISO 7539-2:1995 — Corrosion of metals and alloys - Stress corrosion testing - Part 2: Preparation and use of bent-beam specimen (ISO 7539-2:1989)
SKU: EN ISO 7539-2:1995
Price: 43.71 EUR
Availability: InStock

Corrosion of metals and alloys - Stress corrosion testing - Part 2: Preparation and use of bent-beam specimen (ISO 7539-2:1989)

Название (английский):

EN ISO 7539-2:1995

Corrosion of metals and alloys - Stress corrosion testing - Part 2: Preparation and use of bent-beam specimen (ISO 7539-2:1989)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 8
Дата публикации:: 31 мая 1995 г.
Издание:: CEN EN 7539 edition 1 version 1
ICS:: 77.060

Тип поставки:

Full version120 €Read online 24h10 €Read online 72h15 €

Язык документа:

ruen

Срок поставки:2 раб. дн. (перевод)

Цена:120 €

Описание (английский):

Covers procedures for designing, preparing and using bent-beam test specimens. These specimens may be used to test a variety of product forms (i. e. sheet, plate, flat extruded material, wire or rod). They are espesially suitable for multiple testing and for atmospheric stress corrosion tests; they are usually tested under nominally constant strain conditions. Bent-beam specimens made from high strength materials may fracture rapidly and can be dangerous.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

EN ISO 7539-2:1995 (ISO 7539-2:1989) describes procedures for designing, preparing and using bent-beam specimens for stress corrosion testing of metals and alloys. The standard is part of the ISO 7539 series on corrosion of metals and alloys - stress corrosion testing and must be read with ISO 7539-1 for general test guidance. Bent-beam tests are especially suitable for multiple testing and atmospheric stress corrosion tests, typically conducted under nominally constant strain (or nominally constant load) conditions.

Key topics and technical requirements

Specimen types and product forms: flat strips from sheet, plate or extruded sections; also wire, rod or machined circular-section specimens. Welded parts can be tested.

Surface preparation: retain original surface where appropriate; remove surface layers (e.g., 0.25 mm) by machining/grinding to exclude surface-condition effects; degrease before testing and avoid contamination.

Loading methods: constant-strain configurations including two-point, three-point, four-point, double-beam, lever-loaded and fully-supported specimens. The document provides:

approximate specimen dimension ranges (typical widths 15–50 mm, lengths 110–255 mm; example thin-strip thickness 0.8–1.8 mm with holder spans 175–215 mm),
formulae for calculating elastic surface tensile stress for each loading mode and guidance on applicability (small-deflection limits).

Stress calculation and validation: empirical and theoretical relationships are given; for accurate stresses attach strain gauges to companion specimens.

Safety and material considerations: explicit warning that high-strength materials may fracture rapidly and fragments can be dangerous; personnel must be protected. Chemical/electrochemical surface treatments that produce hydrogen must not be used for hydrogen-susceptible alloys.

Test interpretation: time-to-crack, threshold stress, and replication requirements because wide result variability can occur.

Practical applications and users

Corrosion and materials engineers evaluating stress corrosion susceptibility

Metallurgical laboratories and QA departments performing routine or comparative testing

Manufacturers in aerospace, automotive, marine, oil & gas and structural industries verifying alloy performance and welds

R&D groups comparing coatings, surface treatments, or heat treatments

Why it’s used:

To simulate service bending stresses in the lab and determine threshold stresses and time-to-failure

For multiple-sample screening and atmospheric exposure tests

For comparative studies of alloys, welds and protective coatings

Related standards

ISO 7539-1: General guidance on stress corrosion testing procedures Other parts of the ISO 7539 series:

ISO 7539-3 (U-bend), ISO 7539-4 (uniaxial tension), ISO 7539-5 (C-ring), ISO 7539-6 (pre-cracked), ISO 7539-7 (slow strain rate testing), ISO 7539-8 (welded specimens)

Keywords: EN ISO 7539-2, bent-beam specimen, stress corrosion testing, corrosion of metals, constant strain testing, bent-beam test, specimen preparation, surface finish, stress calculation.

EN ISO 7539-2:1995 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications and users

Related standards

Технические детали

ISO 7539-2:1989

Corrosion of metals and alloys — Stress corrosion testing — Part 2: Preparation and use of bent-beam specimens

ISO 7539-6:2018/Amd 1:2024

Corrosion of metals and alloys — Stress corrosion testing — Part 6: Preparation and use of precracked specime…

SIST EN ISO 7539-10:2020

Corrosion of metals and alloys - Stress corrosion testing - Part 10: Reverse U-bend method (ISO 7539-10:2020)

SIST EN ISO 7539-2:1999

Corrosion of metals and alloys - Stress corrosion testing - Part 2: Preparation and use of bent-beam specimen…

SIST EN ISO 7539-3:1999

Corrosion of metals and alloys - Stress corrosion testing - Part 3: Preparation and use of U-bend specimens (…

SIST EN ISO 7539-4:1999

Corrosion of metals and alloys - Stress corrosion testing - Part 4: Preparation and use of uniaxially loaded…

SIST EN ISO 7539-5:1999

Corrosion of metals and alloys - Stress corrosion testing - Part 5: Preparation and use of C-ring specimens (…

SIST EN ISO 7539-7:2005

Corrosion of metals and alloys - Stress corrosion testing - Part 7: Method for slow strain rate testing (ISO…