ASTM E468-18 rus PDF

Full title and description

ASTM E468-18 — "Standard Practice for Presentation of Constant Amplitude Fatigue Test Results for Metallic Materials". This practice provides guidance on the desirable and minimum information to include when reporting results from constant-amplitude fatigue tests (axial, bending, or torsion) performed on metallic materials in air at room temperature, to improve clarity, reproducibility and reduce misinterpretation of fatigue data.

Abstract

This practice specifies the metadata and presentation conventions that should accompany constant-amplitude fatigue test results: material and heat-treatment information, specimen geometry and preparation, test machine and loading mode, environmental and temperature conditions, and recommended graphical/tabulatory formats (for example S–N curves with scatter representation). The standard also notes Practice E466 as an important related document for test conduct.

General information

• Status: Withdrawn / superseded (replaced by ASTM E468/E468M-23).
• Publication date: 2018-05-01 (designated E468-18).
• Publisher: ASTM International.
• ICS / categories: Mechanical testing of metals / fatigue testing; ICS code often listed under 77.040.10.
• Edition / version: E468-18 (revises E468-11).
• Number of pages: 6 pages.

Scope

This practice covers the desirable and minimum information to be communicated between the originator and the user of data derived from constant-force amplitude axial, bending, or torsion fatigue tests of metallic materials tested in air at room temperature. It is intended to standardize the reporting format and essential test metadata so that results can be properly interpreted and reused. Practice E466 is identified as an important complementary document.

Key topics and requirements

• Required test metadata: material identification, heat treatment, microstructure remarks, and lot/heat number where applicable.
• Specimen details: geometry, dimensions, surface finish, machining and preparation steps.
• Test conditions: loading mode (axial, bending, torsion), load amplitude, R-ratio or mean stress, frequency, test machine identification, and calibration status.
• Environmental conditions: ambient/air, temperature, humidity (when relevant) and any special atmosphere.
• Data presentation: recommended formats for life data (S–N curves), statistical/scatter representation, and tabulated individual-run results.
• Cross-reference to Practice E466 for force-controlled axial fatigue test procedures and other related ASTM test methods.

Typical use and users

Used by fatigue test laboratories, materials engineers, mechanical designers, researchers, and standards writers to ensure consistent, reproducible reporting of constant-amplitude fatigue data for metallic materials. It helps data originators provide complete context and helps users compare and apply fatigue results in design, failure analysis and research.

Related standards

Commonly used with Practice E466 (conducting force-controlled constant-amplitude axial fatigue tests). The 2018 edition (E468-18) superseded earlier versions (E468-11) and itself has been updated/replaced by ASTM E468/E468M-23 in later ASTM revisions; various national catalogs list cross-references to other ASTM and industry standards that cite or reference E468.

Keywords

fatigue, constant amplitude, S–N curve, metallic materials, axial fatigue, bending fatigue, torsion fatigue, test reporting, data presentation, E466.

FAQ

Q: What is this standard?

A: ASTM E468-18 is a practice that defines how to present and report results from constant-amplitude fatigue tests of metallic materials so that results are complete, comparable and interpretable.

Q: What does it cover?

A: It covers the minimum and desirable information to include with fatigue test results (material and specimen details, test machine and procedure, loading mode and parameters, environment, and recommended data presentation such as S–N curves and scatter depiction).

Q: Who typically uses it?

A: Fatigue test laboratories, materials and design engineers, researchers, product qualification teams, and standards developers use it to ensure complete and consistent reporting of fatigue data.

Q: Is it current or superseded?

A: The E468-18 edition was published on May 1, 2018; it is listed in several catalogs as superseded/replaced by ASTM E468/E468M-23 (i.e., later combined metric/imperial edition). Users should confirm and obtain the latest ASTM E468/E468M revision for current requirements.

Q: Is it part of a series?

A: It is part of ASTM's family of standards on fatigue and mechanical testing of metals. It is commonly used together with Practice E466 (test conduct) and other ASTM test methods that reference or depend on standardized fatigue reporting.

Q: What are the key keywords?

A: fatigue, constant amplitude, S–N, metallic materials, test reporting, axial, bending, torsion, E466.