ASTM E1661-95a (2018) PDF

Full title and description

St ASTM E1661-95a (2018) — Standard test method designation E1661 originally issued in 1995 with amendment "a" and reapproved in 2018. This ASTM International standard specifies a standardized procedure and associated requirements for the measurement and evaluation described in the original designation. The document provides definitions, apparatus and equipment requirements, step-by-step test procedure, calculation/reporting conventions, and safety/precision notes intended to ensure repeatable results across laboratories.

Abstract

ASTM E1661-95a (2018) is a reapproval of the E1661 test-method series. The standard defines a controlled method for performing the specified measurement or evaluation and gives requirements for apparatus, sample preparation, test execution, data reduction, and reporting. It is intended to produce reproducible results suitable for quality control, research, and comparative evaluations.

General information

• Status: Reapproved / active as of 2018 (designation E1661-95a (2018)).
• Publication date: Original approval 1995; amendment "a" applied during lifecycle; reapproved 2018.
• Publisher: ASTM International.
• ICS / categories: Materials testing and evaluation; test methods (categorization varies by application).
• Edition / version: E1661-95a, reapproved 2018 (reflects the 1995 base designation with amendment "a").
• Number of pages: Typically a short test-method standard (commonly 4–12 pages); users should consult the official ASTM file for the exact page count.

Scope

This standard establishes a reproducible procedure for the topic defined by designation E1661. It covers required apparatus and materials, specimen preparation, stepwise test procedure, calculations for deriving reported values, and guidance on precision and bias where available. The scope is limited to the specific measurement or evaluation named in the title and does not cover related or broader methods unless explicitly referenced.

Key topics and requirements

• Definitions and terminology required for consistent interpretation of results.
• Detailed list of apparatus, calibration and performance requirements.
• Specimen selection and preparation procedures to reduce variability.
• Step-by-step test procedure with timing, environmental, and operational controls.
• Data reduction, calculation methods, and reporting format.
• Statements on precision, repeatability, reproducibility (when available) and safety considerations.
• References to related ASTM practices and standards for supplementary methods.

Typical use and users

Used by industrial testing laboratories, quality assurance teams, research organizations, and standards bodies that require consistent, comparable measurements for the subject covered by E1661. Typical users include laboratory technicians, test engineers, product developers, and procurement/specification engineers who reference ASTM procedures in purchase specifications or regulatory filings.

Related standards

ASTM test-methods and practices that address sample preparation, calibration, or complementary measurements are commonly referenced alongside E1661. Related ASTM designations will vary by discipline; users should consult ASTM cross-references in the official E1661 document for the precise list of normative and informative references.

Keywords

ASTM, E1661, test method, reapproved 2018, standard, measurement procedure, specimen preparation, test apparatus, data reduction, precision and bias.

FAQ

Q: What is this standard?

A: It is ASTM International designation E1661, originally approved in 1995 with amendment "a" and reapproved in 2018. It defines a single, repeatable test method for the subject identified by the E1661 title.

Q: What does it cover?

A: The standard covers the required equipment, specimen preparation, detailed test procedure, calculation and reporting methods, and notes on precision and safety relevant to the E1661 test method. It does not cover unrelated methods or measurements unless specifically referenced.

Q: Who typically uses it?

A: Laboratory technicians, quality-control engineers, researchers, product developers, and procurement/specification professionals who need a standardized, reproducible procedure for the measurement or evaluation defined by E1661.

Q: Is it current or superseded?

A: The designation presented is shown as reapproved in 2018 (E1661-95a (2018)). Reapproval indicates the technical content was reviewed and retained at that time. For the absolute current status (including any withdrawals or subsequent revisions after 2018), consult the official ASTM registry or publisher.

Q: Is it part of a series?

A: Many ASTM test methods belong to families of related methods or reference companion practices; E1661 may reference or be referenced by other ASTM standards. The official E1661 document contains normative and informative references that indicate any series membership or cross-related standards.

Q: What are the key keywords?

A: ASTM, E1661, test method, measurement, reapproved 2018, specimen preparation, apparatus, data reduction.