Sensitivity Indicator
A sensitivity indicator is a tool for checking the sensitivity and resolution of metals in nondestructive testing methods. It helps determine the quality of the weld.
Physical-Chemical Mechanism of Action
A sensitivity indicator is based on the dissolving power of a specific metal in a chemical medium. This medium reacts specifically with the metal ions and thus indicates its sensitivity.
Metallurgical Relevance & Welding Risks
The sensitivity of a metal can increase after welding, which can lead to more severe cracking. A high sensitivity indicator means the material is sensitive and may require further treatment or a different welding method.
Workshop Practice & Action Guidelines
Use the sensitivity indicator after welding to check the quality of the weld. An indicator value above 15 % indicates increased sensitivity and may require additional measures to improve strength.