# # SAE4320 Thru Carburized HRc=59 # Timken Heat No. 28579 ElecFurn, ConCast 270x375mm HotRoll to 47.6mmBar, # Rough machined, ThruCarburized, final grind +polished 100%Martensite # ASTM GrainSize 4to5, Inclusions: TypeA=2 to 2.5Thin, TypeB,C,D=none # Lots of compressive mean stress indicates Retained Austenite. # Test: UoToledo, F.Yin, A.Fatemi, March 2002 #FileType= strain_life #DataType= raw #Name= SAE4620 #Name= AisiIt_48 #Name= ThruCarburized #Stress_units= MPa #Strain_units= strain #Sy= 1316.6 #Su= 2226.9 #eu= 0.019 engr. strain at Su #E= 207500 (avg. of 11) original reported as 216000 #monotonic_K= 5049.0 #monotonic_n= 0.206 #FractureStrain= 0.019 #FractureStress= 2227 (assume same as ultimate) #%RA= 4 (average of 3) #%Elonagation= 2 % from graph #MaterialForm= bar #FailureDef= 50% load drop #Hardness, Rockwell C= 59 at edge, 52 at center of cross-section #BHN= 634 #StrAmp 2Nf StsAmp So CalcPlasStr InitialModulus 0.0199 20 2249 -112.1 0.00957 207000 #IGL 0.0149 32 2119 -116.3 0.00515 206000 #IGL 0.0147 110 2163 -131.1 0.00470 210000 #IGL 0.0148 138 2099 -122.8 0.00512 209000 #IGL 0.0099 704 1822 -158.2 0.00147 212000 #IGL 0.0100 736 1736 -122.6 0.00198 204000 #IGL 0.0100 738 1746 -110.7 0.00194 208000 #IGL 0.0070 6204 1383 -14.9 0.00064 208000 #IGL 0.0070 7478 1389 -81.9 0.00059 207000 #IGL 0.0070 9064 1376 -142.3 0.00063 203000 #IGL 0.0050 29778 1034 0.0 0.00000 207500 #IGL 0.0050 84388 1051 0.0 0.00000 207500 #IGL 0.0050 162254 1051 0.0 0.00000 207500 #IGL 0.0040 202390 827 0.0 0.00000 207500 #IGL 0.0040 1649902 827 0.0 0.00000 207500 #IGL 0.0040 2054554 827 0.0 0.00000 207500 #IGL 0.0035 9876930 724 0.0 0.00000 207500 #IGL 0.0035 10000000 724 0.0 0.00000 207500 #Runout #Martensite, %= 100 #ASTM Grain Size No. (Min to Max)= 4 to 5 #Carbon, %= 0.2 #Manganese, %= 0.58 #Phosphorus, %= 0.01 #Sulfur, %= 0.016 #Silicon, %= 0.21 #Copper, %= 0.16 #Nickel, %= 1.7 #Chromium, %= 0.15 #Molybdenum, %= 0.26 #Vanadium, %= 0.00 # #