1pcs Professional Rockwell Plastic Hardness Block 100-120HRL Copper Bronze Rectangle Hardness Test Block Specular Surface 60x40x8mm 0.2kg

MeterTo MeterTo mainly offers instruments and tools. Please confirm the product is offered by our store MeterTo when purchasing, otherwise we can't ensure the quality and after-sale service. HR-Rockwell Hardness Rockwell hardness (HR-) value is determined by the indentation plastic deformation depth. With 0.002mm as a hardness unit, when HB>450 or sample is too small, Brinell hardness test cannot be used instead of Rockwell hardness measurement. It uses a diamond cone with a vertex angle of 120° or a steel ball with a diameter of 1.59/3.18, which is pressed into the surface of material to be tested under a certain load, and the hardness is determined from the depth of the indentation. HRA is a hardness obtained by using a 60kg load and a diamond cone indenter for materials with extremely high hardness (such as cemented carbide). HRB is a hardness obtained by hardened steel ball with a load of 100kg and a diameter of 1.59mm. The hardness is used for materials with lower hardness (such as annealed steel, cast iron, etc.). HRC is a hardness obtained with a 150kg load and a diamond cone indenter for materials with high hardness (such as hardened steel). HRC means Rockwell hardness C; HRC and HB are widely used in production; The applicable range of HRC is HRC20-67, which is equivalent to HB225-650. If hardness is higher than this range, Rockwell hardness A HRA is used; if hardness is lower than this range, Rockwell hardness B HRB is used. The upper limit of Brinell hardness, HB650, cannot be higher than this value. The Rocker hardness tester C head is a diamond cone with a top angle of 120°, and the test load is a certain value. Rockwell hardness indentation is small, need to do average measurement, and applicable for finished product and sheet, belong to non-destructive testing. The Rockwell hardness is an unnamed number with no units.

• 60×40×8MM 0.2kg Copper;
• Good quality & low cost;
• Including full categories, series production to meet various needs;
• Rockwell hardness is displayed directly on the dial, digital display, easy to operate, fast and intuitive, suitable for mass production.