Boiler hardness testing is used to measure the hardness of tube materials or other components to assess changes in mechanical properties due to heat, corrosion, or wear. Abnormal hardness values ​​can indicate material degradation such as creep or overheating. This test provides an initial indication of the material's strength and resistance to operational loads. Hardness testing can more accurately determine the need for component repair or replacement to maintain boiler safety and reliability.