Minimum Thickness Calculator – Check ASTM Test Limits | Testavor
Minimum Thickness Calculator for ASTM Hardness Testing – Free Tool by Testavor
Accurate hardness testing starts with verifying that your material meets minimum thickness standards. This free tool helps Canadian engineers, machinists, and inspectors check if their metal components qualify for testing using Leeb, UCI, Rockwell, or Brinell methods. Built in accordance with ASTM E18 and E140, the calculator is ideal for weld inspections, castings, QA reports, and field testing applications.
Already have a reading? Try our Hardness Conversion Calculator. Or explore the Phase II PHT-1700, our top pick for Canadian field techs.
Check if your part is thick enough for valid hardness testing based on ASTM guidelines.
Frequently Asked Questions
What is the minimum thickness for Leeb hardness testing?
For Leeb D impact devices, the recommended minimum thickness is 5mm. For Leeb G, which is used on castings and rough surfaces, a minimum of 10mm is generally required.
Why does material thickness matter for hardness testing?
If the material is too thin, the impact from the hardness test can transfer through the material or cause inaccurate rebound values. This can lead to false readings or damage.
How do I know if my part is too thin?
Use the Testavor Minimum Thickness Calculator by selecting your test method and entering your part's thickness. It will tell you instantly if your component meets the standard requirement.
What happens if I test below the minimum thickness?
You risk getting false hardness values or damaging your material. In such cases, it’s advised to use an alternative test method such as UCI or surface preparation.