# # SAE4320 Carburized Case+Core 0.04inch depth HRc=57 max, Core HRc=44 # (Spec. diameter=0.20inch) Martensite. # Timken Ht. W2555: ElecFurn., LadleRef. IngotCast(711x711mmBloom) # HotRolled to 25.4mm Bar, Then machined. Then carburized. # Chem.: 0.20wt%C .55Mn .009P .015S .25Si .22Cu 1.68Ni .51Cr # .23Mo 0V 0Nb .039Al 0Pb .003Ti 0Ca .01Co 0Zr .0004B .010Sn # 10ppm_O 87ppm_N Inclusions: TypeA=2 to 2.5Thin, TypeB,C,D=0 # ASTM Grain Size No. (Min to Max)= 2 to 3 # Test: UoToledo, F.Yin, A.Fatemi, Oct.2003. #FileType= strain_life #DataType= raw #Name= SAE4320carbur. #Name= AisiIt_63 #Name= Case+Core #Stress_units= MPa #Strain_units= strain #Sy= 1344.5 #Su= 1705.3 #eu= 0.055 approximate engr. strain at Su #full tensile curve not available. #E= 203100 (average of 12), # Reported was = 201000 #monotonic_K= 2343.8 #monotonic_n= 0.084 #TrueFractureStrain= 0.811 #TrueFractureStress= 2198. #%RA= 55.5 #%Elongation= 32 % #MaterialForm= bar #FailureDef= 50% load drop #BHN= 514 HRc=52 #Some InitialModulii below are average nos. #StrAmp 2Nf StsAmp So CalcPlasStr InitialModulus 0.0200 170 1591 -85.1 0.01209 203100 #IGL 0.0200 182 1508 -24.4 0.01251 203100 #IGL 0.0198 188 1503 -34.3 0.01237 203000 #IGL 0.0130 632 1405 9.3 0.00620 203100 #IGL 0.0129 662 1424 -34.4 0.00586 203000 #IGL 0.0130 994 1349 -21.9 0.00624 199000 #IGL 0.0100 2504 1320 2.6 0.00341 203000 #IGL 0.0100 2646 1320 -34.8 0.00342 201000 #IGL 0.0098 3106 1281 -31.0 0.00343 205000 #IGL 0.0050 43600 981 27.9 0.00012 205000 #IGL 0.0050 94164 976 49.6 0.00015 203000 #IGL 0.0050 199624 986 113.4 0.00001 206000 #IGL 0.0040 602350 814 -3.8 0.00000 204000 #IGL 0.0040 1047652 816 3.3 0.00000 203100 #IGL 0.0040 1180590 816 3.3 0.00000 203100 #IGL 0.0035 10000000 718 0.0 0.00000 203100 #Runout 0.0035 10000000 719 53.6 0.00000 205000 #Runout 0.0035 10000000 719 0.0 0.00000 203100 #Runout #Carbon, %= 0.2 #Manganese, %= 0.55 #Phosphorus, %= 0.009 #Sulfur, %= 0.015 #Silicon, %= 0.25 #Copper, %= 0.22 #Nickel, %= 1.68 #Chromium, %= 0.51 #Molybdenum, %= 0.23 #Vanadium, %= 0.00 #Columbium/Niobium, %= 0.00 #Aluminum, %= 0.039 #Lead, %= 0.000 #Titanium, %= 0.003 #Calcium, %= 0.00 #Cobalt, %= 0.010 #Zirconium, %= 0.000 #Boron, %= 0.0004 #Tin, %= 0.010 #Oxygen, ppm= 10 #Nitrogen, ppm= 87 # #