# SAE8620Carburized Shaft Rotating Bending HRc=61.4 Surface # Case depth 0.37mm AISI Iter 171, # Source:Gerdau M54117: Elec.Furnace, VacDegas, LadleRefined Con.Cast # HotRolled Bar 30.1mm, Original: GrainSize ASTM E112 FineGrain= 5-8 # Orig.Chem.: 0.22C .95Mn .013P .009S .25Si .21Cu .5Ni .57Cr .21Mo # .002V .003Co .024Al .009Sn # specimens were vacuum carburized and gas quenched by Dana with no # finish grinding after heat treatment. The test machine # is a Fatigue Dynamics RBF-200 operating at 4,500rpm (75hz) in air. # Tested by E.Vincent, Eaton Corp 2017 # #FileType= strain_life #DataType= raw #Name= SAE8620carburized #Name= AISIiter171 #Name= RotatingBend #Stress_Units= MPa #Strain_Units= strain #Sy= 0 not measured #Su= 0 not measured #%RA= 0 not measured #E= 206824 #BHN= 682 from HRc= 61.4 # WARNING! Strains Calculated by assuming Elastic # Emod is probably assumed ? and not measured? #Assume 20000000 is runout #Estimated Assume Assum #StrAmpl. 2Nf StsAmpl-? So PlsStrAmpl Emod 0.00233 20000000 483 0 0 206804 #runout 0.00300 20000000 621 0 0 206804 #runout 0.00367 20000000 759 0 0 206804 #runout 0.00383 20000000 793 0 0 206804 #runout 0.00400 164640 827 0 0 206804 0.00400 20000000 827 0 0 206804 #runout 0.00400 20000000 827 0 0 206804 #runout 0.00410 179920 848 0 0 206804 0.00410 20000000 848 0 0 206804 #runout 0.00410 173320 848 0 0 206804 0.00417 82420 862 0 0 206804 0.00417 20000000 862 0 0 206804 #runout 0.00417 86660 862 0 0 206804 0.00417 115660 862 0 0 206804 0.00423 351960 876 0 0 206804 0.00423 132560 876 0 0 206804 0.00423 171760 876 0 0 206804 0.00433 34500 896 0 0 206804 0.00433 73800 896 0 0 206804 0.00433 94900 896 0 0 206804 0.00433 172820 896 0 0 206804 #Original data #Spec# Matl Diam. Runout Nf StressKsi StressMPa #Red-1 8620 6.359 0.03302 10000000 70 482.7 #Red-2 8620 6.418 0.04826 10000000 90 620.6 #Red-4 8620 6.373 0.01016 10000000 110 758.5 #Red-6 8620 6.36 0.0508 10000000 115 792.9 #Red-5 8620 6.369 0.01778 82320 120 827.4 #Red-8 8620 6.367 0.10922 10000000 120 827.4 #Red-11 8620 6.355 0.0254 10000000 120 827.4 #Red-14 8620 6.37 0.04064 89960 123 848.1 #Red-18 8620 6.345 0.0254 10000000 123 848.1 #Red-19 8620 6.336 0.03556 86660 123 848.1 #Red-9 8620 6.406 0.1143 41210 125 861.9 #Red-12 8620 6.372 0.02032 10000000 125 861.9 #Red-13 8620 6.358 0.03302 43330 125 861.9 #Red-22 8620 6.367 0.10414 57830 125 861.9 #Red-25 8620 6.339 0.01524 175980 127 875.7 #Red-3 8620 6.381 0.06096 66280 127 875.7 #Red-10 8620 6.357 0.05842 85880 127 875.7 #Red-20 8620 6.353 0.03556 17250 130 896.4 #Red-21 8620 6.34 0.05334 36900 130 896.4 #Red-23 8620 6.337 0.03048 47450 130 896.4 #Red-24 8620 6.344 0.05334 86410 130 896.4 # # #