Work Item
ASTM WK91749

Revision of A1038-19 Standard Test Method for Portable Hardness Testing by the Ultrasonic Contact Impedance Method

Rationale

Section 5.3.1 states “A spring inside the probe applies the specified test load…”. This statement unnecessarily limits probe design because it is based on old probe designs that used a mechanical spring and a switch mechanism to measure the frequency shift when the chosen test force was achieved. Newer technologies such as load cells can measure the frequency when the specified test force is reached without the use of a spring. This ballot item changes the wording so that probe design is not limited to any one design or technology.

Details

Developed by Subcommittee: A01.13

Committee: A01

Staff Manager: W Scott Orthey

Work Item Status

Date Initiated: 07-26-2024

Technical Contact: Tom Ott

Item: 000

Ballot:

Status: