These conversion charts are provided for guidance only as each scales uses different methods of measuring hardness. O-Ring Installation Compressive Load vs Hardness Shore A Scale. Table of Components Showing Relevant Surface Hardness Values. Carbide inserts recommended hardness per application. Steel Hardness Conversion Table This table shows approximate hardness of steel using Brinell, Rockwell B and C and Vickers scales. Rockwell Superficial Brinell Vickers Shore Hardness Conversion Chart. Choosing a too-hard grade can cause catastrophic failure from insert breakage or lower tool-life due to the cutting edge’s chipping. Rockwell Hardness, Rockwell Hardness, HRB. The high hardness comes hand in hand with lower toughness and brittleness. Conversion of hardness-to-hardness or hardness-to-tensile-strength values for. Tungsten Carbide Grades range between13 HV, and therefore are suitable to cut metals. Steel can reach after heat treatment hardness of up to 1,000. Most cutting tools are made from Tungsten Carbide. Convert the hardness measurements from the Vickers Hardness tester to the tensile strength in MPa Table 2: Rockwell Hardness Test Results Material Reading 1. Material Groups Hardness Range Material Group HB HRC Steel (Annealed) 70-270 <28 Steel (Quenched and tempered) 270-350 29-38 Steel (Hardened) 350-750 39-68 Stainless Steel (Austenitic) 70-180 <10 Cast Iron 180-300 10-32 Aluminum 60-100 – Heat resistance superalloys (Inconel) 130-450 <46 Titanium 70-370 <40 Tungsten Carbide Above a certain threshold, it will become impossible to machine the material with a conventional carbide insert, and advanced materials such as Ceramics and CBN will be mandatory. From a certain hardness point, increasing the hardness further increases the wear and will either require you to reduce the cutting speed or settle for a lower tool-life. It is impossible to break chips below a certain hardness, and the raw material tends to stick on the cutting edge causing BUE. Raw MaterialsĪlthough counter-intuitive, it is not ideal to machine very soft material.
It is the primary parameter to know for both the raw materials and the cutting materials. These values are approximate and for guidance only. (1) See specification for additional residual element requirementsHardness is one of the most critical parameters in any machining discussion. Steel hardness conversion chart: Shows equivalents using Brinell, Rockwell B and C and Vickers scales. (3) See specification for additional residual element requirements Contact your Scot Forge sales representative for additional information. (1) Several different Mn ranges are available. The resulting hardness value is a number on the Rockwell scale in BHN or HRC units.
Scot Forge specifically disclaims all warranties, expressed, implied or otherwise, including, without limitation, all warranties of merchantability, fitness or suitability for a particular purpose or application. (1) Not required by specification but may be specifiedĭisclaimer: Although the information set forth herein is believed to be correct, Scot Forge makes no recommendation, or offers no warranty of any kind, with respect to the subject matter or its accuracy.
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