Which of the following is a hardness testing method?

Which of the following is a hardness testing method?

• A. Rockwell
• B. Izod
• C. MTR
• D. Tensile

Answer: (A)

Hardness testing measures how resistant a material is to indentation under a specific load. Rockwell testing is a standard hardness method that uses a defined indenter and load, and reads hardness from the indentation size or depth on a standardized scale (for example, HRC or HRB). This directly assesses hardness. Izod is an impact test that measures energy to fracture, not indentation hardness. MTR, or Material Test Report, is documentation of tests rather than a testing method. Tensile testing measures how a material behaves under axial pulling to determine strength and ductility, not hardness. So Rockwell is the hardness testing method.

Hardness testing measures how resistant a material is to indentation under a specific load. Rockwell testing is a standard hardness method that uses a defined indenter and load, and reads hardness from the indentation size or depth on a standardized scale (for example, HRC or HRB). This directly assesses hardness. Izod is an impact test that measures energy to fracture, not indentation hardness. MTR, or Material Test Report, is documentation of tests rather than a testing method. Tensile testing measures how a material behaves under axial pulling to determine strength and ductility, not hardness. So Rockwell is the hardness testing method.