JJF 2074-2023 《Calibration Specification for International Rubber Hardness Degrees Reference Blocks(Scales N,H,L)》 Related products

JJF 2074-2023 "Standard Rubber International Hardness Blocks (N, H, L Rulers) calibrating specification" is applicable to the calibrating work of standard Rubber International Hardness Blocks (N, H, L Rulers). This specification refers to GB/T2941 on the general procedure for specimen preparation and adjustment in rubber physical test methods. Rubber International Hardness Blocks determine the Rubber International Hardness Unit (IRHD) by measuring its indentation depth to the rubber after applying a small test force and a main test force to a certain diameter steel ball. N, H, L Rulers are suitable for different hardness testing needs according to the diameter of the steel ball and the test force. This specification details the scope of use and calibration methods for each ruler, designed to ensure the accuracy and traceability of Hardness blocks.