ASTM D1693-21 rus PDF

Full title and description

Designation: ASTM D1693‑21 — Standard Test Method for Environmental Stress‑Cracking of Ethylene Plastics. The method specifies procedures for preparing specimens, applying controlled tensile stress or strain, exposing specimens to selected chemical environments (for example, soaps, wetting agents, oils, or detergents), and evaluating the development of stress‑crack failure. The appended "rus" in the title commonly indicates a requested Russian‑language copy or translation of the ASTM D1693‑21 text; the original ASTM publication is in English.

Abstract

This test method determines the susceptibility of ethylene plastics (as defined in ASTM Terminology D883) to environmental stress‑cracking when subjected to controlled stress/strain in the presence of defined chemical environments. Results are reported in terms of specimen failures/time under specified conditions and are intended for material comparison, quality control, and research into environmental cracking behavior. The procedure uses SI units and defines failure as the appearance of a visible crack.

General information

• Status: Active.
• Publication date: 1 October 2021 (Designation D1693‑21).
• Publisher: ASTM International (formerly American Society for Testing and Materials).
• ICS / categories: 83.080.20 — Thermoplastic materials.
• Edition / version: D1693‑21 (2021 revision of earlier D1693 editions).
• Number of pages: 11.

Scope

This test method covers determination of the susceptibility of ethylene plastics to environmental stress‑cracking under the specified test conditions. It describes specimen geometry, controlled imperfections, levels of strain/stress (different conditions for different polyethylene types), the selection and preparation of test environments, temperature control, observation intervals, and the definition of failure. The standard notes that results are affected by thermal history and that the test is not intended to address all safety concerns.

Key topics and requirements

• Specimen preparation and controlled imperfection (notch) to promote crack initiation.
• Specified test conditions (strain/stress conditions, test temperatures, and exposure media) tailored for ethylene plastics and polyethylene types.
• Definition of failure: any crack visible to an observer with normal eyesight is interpreted as specimen failure.
• Use of SI units as the standard measurement system.
• Guidance on comparing materials, limitations due to thermal history, and caution about ranking materials solely by this test method.

Typical use and users

Used by polymer testing laboratories, quality control departments, material and compound suppliers, R&D teams, and specification writers to assess and compare resistance of ethylene plastics (especially polyethylene) to environmental stress‑cracking. Also referenced by manufacturers of plastic products subject to detergents, oils, or surfactants where stress‑cracking is a failure mode of concern.

Related standards

D1693 references and is used alongside other ASTM plastics and polyethylene standards (for example, Terminology D883, material specifications such as D1248 and D3350, and related test methods). It has revised earlier editions (e.g., D1693‑15/e01) and is cited by a number of ASTM material and test standards concerned with polyethylene properties and identification.

Keywords

environmental stress‑cracking; ethylene plastics; polyethylene; stress‑crack; specimen; exposure media; detergents; soaps; test method; ASTM D1693‑21.

FAQ

Q: What is this standard?

A: ASTM D1693‑21 is a standardized test method that specifies procedures to assess the susceptibility of ethylene plastics to environmental stress‑cracking when subjected to controlled stress or strain in chemical environments.

Q: What does it cover?

A: It covers specimen geometry and preparation, test conditions (levels of stress/strain and temperature), types and preparation of exposure media (soaps, wetting agents, oils, detergents), inspection intervals, failure criteria (visible cracking), and reporting. It also includes notes on limitations and proper interpretation of results.

Q: Who typically uses it?

A: Polymer testing laboratories, product manufacturers, material suppliers, R&D groups, and quality assurance teams concerned with the environmental durability of polyethylene and other ethylene plastics.

Q: Is it current or superseded?

A: The current designation is D1693‑21 (published 1 October 2021) and it supersedes earlier editions (for example D1693‑15/e01). Users should confirm whether any amendments or later revisions have been issued before applying the method.

Q: Is it part of a series?

A: D1693 is part of ASTM Committee D20 (Plastics) work and is usually used together with other ASTM plastics standards (terminology, material specifications, and related test methods) that address polyethylene characterization and product requirements.

Q: What are the key keywords?

A: environmental stress‑cracking, ethylene plastics, polyethylene, stress‑crack failure, exposure media, ASTM D1693‑21.