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# SAE8620 Q+T Simul. Carburized Core, Constant Ampl., Axial, HRc=38 # Gerdau Ht M27967 ElecFurnace VacDegas ConCast, Hot Roll to 19.1mm bar. # Samples austenitized at 1700F 3.5hr. lowered to 1600F 40min, Quench 140F oil # tempered at 350F to aim for HRC=36, Bainite, %= 50 #Martensite, %= 50 # Chem.: 0.22wt%C .83Mn .006P .023S .25Si .20C .45Ni .50Cr # .18Mo .003V .002Nb .027Al .0003Pb .002Ti .0007Ca .0002B .007Sn # Inclusion Rating: TypeA=2.0T 0.5H TypeB=0.5T 0.0H TypeC=0 TypeD=1.0T 05H3 # Tested by J.Lindsey UoToledo 2010 #FileType= strain_life #DataType= raw #Name= SAE8620 #Name= Iteration 120 #Units= MPa #Sy= 795.8 #Su= 1145.2 #eu= 0.053 engr. strain at Su #E= 206900 average of 15 initial loadings. Tensile test E=210300 #monotonic_K= 2132.3 #monotonic_n= 0.165 #MaterialForm= bar #%RA= 50.8 % #%Elongation= 35.5 % #TrueFractureStress= 1586 #TrueFractureStrain= 0.711 #Hardness, Rockwell C= 38 #BHN= 352 #Total Strain Amplitude, 2Nf, Stress Amplitude, Mean Stress, Calculated Plastic Strain Amplitude, Initial Elastic Modulus 0.020000 386 1031 -5.9 0.015090 214000 #IGL 0.020000 404 996 -5.5 0.015270 211000 #IGL 0.020000 490 984 -5.6 0.015320 203000 #IGL 0.010010 3168 867 -9.3 0.005890 212000 #IGL 0.009990 3198 850 -5.9 0.005950 199000 #IGL 0.010010 3264 845 -6.2 0.005990 203000 #IGL 0.005000 20532 699 0.7 0.001670 214000 #IGL 0.005000 22446 675 -1.1 0.001790 214000 #IGL 0.005010 27584 690 -10.3 0.001720 205000 #IGL 0.003540 75378 597 2.1 0.000700 207000 #IGL 0.003510 81370 596 41.3 0.000670 199000 #IGL 0.003490 89296 573 25.7 0.000770 200000 #IGL 0.002550 325116 503 1.3 0.000160 206900 #IGL 0.002510 335166 494 1.2 0.000160 206000 #IGL 0.002520 928224 502 1.3 0.000130 207000 #IGL 0.002250 2843664 450 1.0 0.000110 206900 #IGL 0.002250 10000000 455 1.0 0.000090 206900 #Runout 0.002250 10000000 464 1.0 0.000040 209000 #Runout #Carbon, %= 0.2200 #Manganese, %= 0.8300 #Phosphorus, %= 0.0060 #Sulfur, %= 0.0230 #Silicon, %= 0.2500 #Copper, %= 0.2000 #Nickel, %= 0.0070 #Chromium, %= 0.5000 #Molybdenum, %= 0.1800 #Vanadium, %= 0.0030 #Columbium/Niobium, %= 0.0020 #Aluminum, %= 0.0270 #Lead, %= 0.0003 #Titanium, %= 0.0020 #Calcium, %= 0.0007 #Zirconium, %= 0.0010 #Boron, %= 0.0002 #Tin, %= 0.0070 # #