Macrohardness testing
Macro hardness testing determines the average hardness of a material over a larger area. It reflects the macroscopic behavior of the overall structure and averages out local inhomogeneities.
Physical-Chemical Mechanism of Action
The macro hardness test measures the hardness of a material over a larger area by pressing an indenter with known strength into the material. The depth of penetration indicates how hard the material is.
Metallurgical Relevance & Welding Risks
The macro hardness test helps monitor hardness homogeneity in weld zones. Too low hardness can lead to cracks and failure, while too high hardness coarsens the structure and reduces toughness.
Workshop Practice & Instructions
Use a Brinell or Rockwell hardness tester. Press the indenter onto the material with a fixed load (e.g., 1000 N for Brinell) and note the depth of penetration. Compare the result with the material's specific hardness limits.