Fig. 2 Relationship between Vickers hardness (HV30) and Rockwell hardness (HRA). Courtesy of Materialprüfungsam (Materials Testing Agency) Dortmund, Germany. More

Fig. 7 Relationship of Vickers and Rockwell hardness scales More

Fig. 44 Example of a Rockwell hardness test where the sample is too thin. Although materials this thin are seldom induction hardened, the same principle applies when a heavy load is used on a thin case. The test impression effectively “punches through” the case and the soft core affects More

Fig. 30 Electrical conductivity and Rockwell hardness versus aging time at 190 °C (375 °F) for Al-2.62Cu-1.35Mg alloy. Source: Ref 94 More

Fig. 46 Rockwell hardness of engineering plastics More

Fig. 23 Rockwell hardness of engineering plastics. PET, polyethylene terephthalate; PA, polyamide; PPO, polyphenylene oxide; PBT, polybutylene terephthalate; PC, polycarbonate; ABS, acrylonitrile-butadienestyrene More

Fig. 7 Typical anvils for Rockwell hardness testing. (a) Standard spot, flat, and V anvils. (b) Testing table for large workpieces. (c) Cylinder anvil. (d) Diamond spot anvil. (e) Eyeball anvil More

Fig. 11 Setup for Rockwell hardness testing of inner surfaces of cylindrical workpieces, using a gooseneck adapter More

Fig. 12 Electrical conductivity and Rockwell hardness versus aging time at 190 °C (375 °F) for Al-2.62%Cu-1.35%Mg alloy. Source: Ref 28 More

Fig. 6 Principal components of a regular (normal) Rockwell hardness tester. Superficial Rockwell testers are similarly constructed. More

Fig. 7 A digital Rockwell hardness tester More

Fig. 20 Rockwell hardness of engineering plastics. PET, polyethylene terephthalate; PA, polyamide; PPO, polyphenylene oxide; PBT, polybutylene terephthalate; PC, polycarbonate; ABS, acrylonitrile-butadiene-styrene More

Fig. 13 Approximate correlation between Brinell and Rockwell hardnesses of wrought aluminum alloys More

Fig. 14 Hardness (Rockwell C scale) distribution in an induction-hardened 1070 carbon steel shaft. More

Fig. 5 Plot of relative density and Rockwell 15T hardness scale for the die compaction of a WC-Co powder. Source: Ref 35 More

Fig. 1 Hardness conversion between Vickers and Rockwell C data. Triangles, hot working tool steel H11; circles, high speed steel M2; squares, high speed steel T42; other symbols, other high speed steels More

Fig. 17 Comparison of the cross-sectional Rockwell C hardness and fatigue strength of microalloyed steel forgings (air-cooled 1541 grade containing 0.18% V) and medium-carbon quenched and tempered steel forgings (1043 grade). Source: 22 Fatigue test results Stress Cycles More

Fig. 3 Schematic of hardness (Rockwell C) test traverses made on a series of steel bars of the same composition but with different diameters. Adapted from Ref 1 More

Fig. 27 Rockwell C hardness profiles in 2.5 cm (1 in.) diameter steel bar following furnace austenitizing and water quenching. (a) 1042 and 1095 steels. (b) 1020, 4620, and 8620 steels. The hardnesses are plotted versus the fractional radial distance ( x / r ) from the center of the bar ( r More

Fig. 8 Correlations between Knoop hardness at loads form 15-1000 gf and Rockwell C hardness. Source: Ref 2 More