# # SAE4140 Q+T HRc= 31 # 2.1inch bar, quarter sectioned for specimens, # Austenitized 1550F, Oil Q., Tempered 1550F # Ispat-Inland, ElecFurn., LadleRefined, ConCast, HotRolled 52mm bar # Chem: .42%C .92Mn .01P .021S .16Cu .07Ni .98Cr .18Mo .040Al # .0002B .010Sn 10ppm_N # Martensite with speroidal carbide particles. Inclusion: Sulfide type A 2 # Tested B.Li U.Toledo #FileType= strain_life #DataType= raw #Name= SAE4140 #Name= AisiIt_30 #Name= Quench+Temper #Stress_units= MPa #Strain_units= strain #Sy= 928.9 #Su= 1042.9 #E= 207000 #FractureStress= 1519. #FractureStrain= 1.0 #%RA= 61.3 #monotonic_K= 1303.3 #monotonic_n= 0.059 #MaterialForm= bar #FailureDef= 50% load drop #BHN= 325 #Hardness, Rockwell C= 31 #StrAmp 2Nf StsAmp So CalcPlasStr InitialModulus 0.0200 378 891 -4.2 0.01570 208000 #IGL 0.0199 396 915 -8.2 0.01542 202000 #IGL 0.0200 460 875 -3.9 0.01560 200000 #IGL 0.0100 1920 766 -1.5 0.00622 204000 #IGL 0.0100 2650 758 -5.7 0.00627 205000 #IGL 0.0100 3062 752 -2.3 0.00637 207000 #IGL 0.0060 10240 677 0.0 0.00267 205000 #IGL 0.0060 10600 671 -0.5 0.00273 205000 #IGL 0.0060 10940 671 -0.5 0.00287 214000 #IGL 0.0035 53220 593 19.8 0.00067 211000 #IGL 0.0035 53920 595 7.7 0.00061 206000 #IGL 0.0035 63360 595 19.8 0.00062 208000 #IGL 0.0025 242806 511 294.2 0.00004 209000 #IGL 0.0025 258942 518 286.8 0.00003 210000 #IGL 0.0025 358078 515 309.4 0.00003 209000 #IGL 0.0021 4963970 446 62.6 0.00001 213000 #Overload 0.00215 10000000 445 0.0 0.00000 207000 #Runout Strain computed from Stress 0.00214 10000000 444 0.0 0.00000 207000 #Runout Strain computed from Stress #Carbon, %= 0.42 #Manganese, %= 0.92 #Phosphorus, %= 0.01 #Sulfur, %= 0.021 #Silicon, %= 0.26 #Copper, %= 0.16 #Nickel, %= 0.07 #Chromium, %= 0.98 #Molybdenum, %= 0.18 #Vanadium, %= 0.00 #Columbium/Niobium, %= 0.00 #Aluminum, %= 0.040 #Boron, %= 0.0002 #Tin, %= 0.010 #Nitrogen, ppm= 10 #Here is the bottom part of the html graph/calc wrapper----------- # #