# # Fitted Curve. # SAE4140 Rc=49.5 Source: ElecFurnace ConCast, Normalized 1650F # Forged at 2150F reduced 83%, Quenched from 1550F in 150F oil # Tempered 500F, 100%Martensite, Inclu.: TypeA 0.5Thin, TypeD 1.0Heavy # Test: UoToledo # saedigcurve_v2.2.f starts. #FileType= strain_life #DataType= fitted #Name= SAE4140 #Name= AisiIt_76 #Stress_units= MPa #Strain_units= strain #Sy= 1669.2 #Su= 1924.3 #E= 206000 (avg. of 10) Reported was: 213000 #monotonic_K= 2625.9 #monotonic_n= 0.071 #FractureStrain= 0.163 #FractureStress= 1859. #%RA= 15.7 #MaterialForm= bar #FailureDef= 50% load drop #BHN= 477 #Hardness, Rockwell C= 49.5 #Basic Oxygen= False #Electric Furnace= True #Vacuum Degas= False #Ladle Refined= False #Ingot Cast= False #Continuous Cast= True #Martensite, %= 100 #Carbon, %= 0.41 #Manganese, %= 0.94 #Phosphorus, %= 0.01 #Sulfur, %= 0.012 #Silicon, %= 0.28 #Copper, %= 0.17 #Nickel, %= 0.15 #Chromium, %= 1.01 #Molybdenum, %= 0.22 #Aluminum, %= 0.028 #Tin, %= 0.010 #Nitrogen, ppm= 94 # SAE4140 AisiIt_76 BHN= 477 Fn= 0 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 29878. KSI, 206. GPA K' = 444.8 KSI, 3067.MPA #YIELD,0.2%= 242. KSI, 1669. MPA N' = 0.1364 #ULT. STRG.= 279. KSI, 1924. MPA F. STRG COEF= 356.9 KSI, 2461.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.0949 #N = 0.0000 FAT DUCT COEF= 0.1992 #RED. IN AREA = 15.7 F.DUCT EXP, c=-0.6952 #T. FRAC. STG.= 269.6 KSI, 1859. MPA Exp Cyc Yld = 191. Ksi,1314.MPA #T. FRAC. STR.= 0.163 Fit Cyc Yld = 203. Ksi,1402.MPA #No. fatigue data points= 20 # # NOTE!! The Following Points are <b>FITTED DATA:</b>#NOTE!! Fitted Stress computed using Experm. K' and n' # NOTE!! Tensile and fatigue limits adjusted manually. FAC Ju09 #Stress_Units= MPa # Total Strain 2Nf Stress Mean Plastic Strain Initial # Amp Amp Stress Amp Elastic Mod. .163 1 1859 0. .154 206000. #Fitted_point manually 0.02137 50 1712.7 0. 0.01305 206000. #Fitted_point 0.01582 100 1624.2 0. 0.00794 206000. #Fitted_point 0.01223 200 1538.1 0. 0.00477 206000. #Fitted_point 0.00927 500 1426.2 0. 0.00235 206000. #Fitted_point 0.00784 1000 1341.7 0. 0.00133 206000. #Fitted_point 0.00682 2000 1256.7 0. 0.00072 206000. #Fitted_point 0.00586 5000 1145.1 0. 0.00030 206000. #Fitted_point 0.00532 10000 1064.0 0. 0.00015 206000. #Fitted_point 0.00487 20000 988.2 0. 0.00008 206000. #Fitted_point 0.0039 63502 804 0.0 0.00000 0000 #Fitted_point IGL 0.0033 200000 679 .0 .0 0 #Fitted_point manually 0.0033 10000000 679 .0 .0 0 #Fitted_point manually #