ASTM E1065/E1065M-20 (2025) PDF

Full title and description

ASTM E1065/E1065M-20(2025) — Standard Practice for Evaluating Characteristics of Ultrasonic Search Units. This practice provides standardized measurement procedures for characterizing the acoustic and electrical responses of single‑element piezoelectric ultrasonic search units (probes) used with ultrasonic testing instrumentation; it is intended to supply data from which performance and acceptance criteria may be developed but does not itself prescribe acceptance limits.

Abstract

This standard describes procedures and test methods to obtain performance data for ultrasonic search units, including frequency and time response, beam profiling, focal point and depth of field determinations, and electrical characteristics. Procedures are applicable to bench or laboratory characterization systems and to commercial search‑unit characterization equipment. Annexes cover a range of measurement methods and frequency bands (general annexes A1–A6 for ~0.4–10 MHz, A7 for higher‑frequency immersion units, A8 for sound beam profiling in metals). The practice treats SI and inch‑pound units separately.

General information

• Status: Active — E1065/E1065M-20 reaffirmed/reissued in 2025 (document listed as E1065/E1065M-20(2025) / E1065_E1065M-20R25).
• Publication date: Published June 1, 2025; last updated/recorded in ASTM tracking June 26, 2025.
• Publisher: ASTM International.
• ICS / categories: 17.140.01 — Acoustic measurements and noise abatement (general).
• Edition / version: E1065/E1065M-20 (2025 revision/reissue).
• Number of pages: 24 pages.

Scope

This practice covers measurement procedures for evaluating certain characteristics of ultrasonic search units used with ultrasonic testing instrumentation. It describes methods to obtain acoustic and electrical performance data for individual search units (separate from the instrument), and is applicable to incoming inspection, manufacturing acceptance, and periodic evaluation during service life. The procedures in the normative annexes are generally applicable to search units operating in the 0.4 MHz to 10 MHz range; supplementary annexes address higher‑frequency immersion units and beam profiling in metals. The practice is not intended to set pass/fail criteria; rather it provides standardized data from which acceptance criteria can be established.

Key topics and requirements

• Standardized procedures for measurement of acoustic parameters (beam profile, focal point, depth of field, sound pressure distribution).
• Frequency and time response characterization, including peak frequency and bandwidth.
• Electrical characterization of search units (impedance, electrical response) when used separately from instruments.
• Annexed methods for immersion testing and beam profiling in metal; guidance on test setups and instrumentation (signal generators, pulsers, amplifiers, digitizers, oscilloscopes, waveform analyzers).
• Dual‑unit approach (SI and inch‑pound systems are specified separately and are not to be combined).
• Intended for single‑element piezoelectric search units; implementation may require facility‑specific procedural detail.

Typical use and users

Used by nondestructive testing (NDT) laboratories, ultrasonic probe manufacturers, quality assurance and incoming inspection teams, calibration laboratories, research and development groups working on ultrasonic transducers, and organizations that maintain ultrasonic testing assets. Typical applications include manufacturing acceptance testing, periodic performance verification of probes in service, and laboratory characterization for probe selection and development.

Related standards

This practice is part of the body of ASTM ultrasonic and NDT standards and is referenced by or related to other standards (examples reported in standards catalogs): A388/A388M, A418/A418M, E2533, E2580, E2981, E543 and other ultrasonic testing practices such as E164, E587, and E494. It is developed under ASTM Committee E07 (Subcommittee E07.06). Users often consult these related practices when integrating probe characterization with specific inspection techniques.

Keywords

ultrasonic search unit; probe; characterization; aperture; bandwidth; frequency response; peak frequency; time response; beam profile; focal point; depth of field; immersion testing; contact testing; piezoelectric; NDT.

FAQ

Q: What is this standard?

A: ASTM E1065/E1065M-20(2025) is a standard practice that defines procedures for evaluating and characterizing the acoustic and electrical characteristics of single‑element ultrasonic search units (probes). It provides standardized test methods and annexed procedures for different measurement types.

Q: What does it cover?

A: It covers measurement techniques for frequency and time response, beam profiling (including sound beam profiles in metals), focal point and depth‑of‑field determination, and electrical response of search units; annexes specify methods for typical frequency ranges and for higher‑frequency immersion units. The practice is intended to supply measurement data rather than to specify acceptance criteria.

Q: Who typically uses it?

A: NDT engineers and technicians, probe manufacturers, QA and inspection teams, calibration laboratories, and R&D groups involved in ultrasonic transducer design and verification.

Q: Is it current or superseded?

A: Current — the 2020 edition (E1065/E1065M-20) is recorded/reissued as E1065/E1065M-20(2025) with tracking and an active status in ASTM’s catalog as of June 2025. Users should verify the current status before purchase or application to ensure no later revisions exist.

Q: Is it part of a series?

A: Yes — it is part of ASTM Committee E07’s suite of nondestructive testing standards (subcommittee E07.06 for ultrasonic search‑unit characterization) and is commonly used alongside other ultrasonic testing practices and guides.

Q: What are the key keywords?

A: aperture, bandwidth, characterization, contact testing, depth of field, focal point, frequency response, immersion testing, peak frequency, search unit, sound beam profile, time response, ultrasound.