Leeb Hardness Test Blocks HLD Leeb Hardness Test Blocks are used for calibration the hardness testers according to Leeb method. Leeb hardness testing complies to DIN 50156 and ASTM A956. Leeb Hardness Test Block is produced of carbon or alloy steel, has one tested area (operating side) which has the required hardness. The tested area will have several indenter prints as factory final final calibration tests. Also, each calibration block has its identification number on its lateral surface. Measurement range: 530±40 HLD, 630±40 HLD, 790±40 HLD. Dimensions: diameter : 88 mm, height : 55 mm. Weight: 3 kg. If user need another range of values, please discuss the order before payment. Also there are available other types of Leeb test blocks, such as G-type, etc.