# # Fitted Curve #saedigcurve_v2.2.f starts. # AISI SAE 1090M (GM) Hot Form-Accelerated Cooled Steel It.10 Rc=28 # Basic Oxygen, LadleRef, HotRolled to 50.8mm bar, As-Forged 2100F, Austempered # 95% Pearlite, 5%Bainite # Type A inclusions of 1.5, Type B,C,D not seen. # Tensile has upper/lower yield type curve. # 0.88C .58Mn .002P .021S .22Si .28Cu .08Ni .14Cr .02Mo .03Va .002Ca # .0024B Al <.001 .001Ti .0024O .003Cb wt% > # Test: U.Waterloo A.V-Farahani,T.Topper Sept May 1998 #HRc=28, UpperYield=112.1ksi # #FileType= strain_life #DataType= fitted #Name= SAE1090 #Name= AisiIt_10 #Stress_units= MPa #Strain_units= strain #Sy= 759.5 #Su= 1124.0 #E= 214000 #monotonic_K= 1575.5 #monotonic_n= 0.108 #LowerYield= 759.5 #UpperYield= 772.7 #FractureStrain= 0.50 #FractureStress= 840 #%RA= 37.6 #MaterialForm= bar #FailureDef= 50% load drop #BHN= 272 #Hardness, Rockwell C= 28 #StrAmp 2Nf StsAmp So CalcPlasStr InitialModulus #Basic Oxygen= True #Electric Furnace= False #Vacuum Degas= False #Ladle Refined= True #Ingot Cast= False #Continuous Cast= True #Bainite, %= 5 #Pearlite, %= 95 #Carbon, %= 0.88 #Manganese, %= 0.58 #Phosphorus, %= 0.002 #Sulfur, %= 0.021 #Silicon, %= 0.22 #Copper, %= 0.28 #Nickel, %= 0.08 #Chromium, %= 0.14 #Molybdenum, %= 0.02 #Vanadium, %= 0.03 #Columbium/Niobium, %= 0.00 #Aluminum, %= 0.001 #Titanium, %= 0.001 #Calcium, %= 0.00 #Boron, %= 0.0024 #Oxygen, ppm= 24 # SAE1090 AisiIt_10 BHN= 272 Fn= 0 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 31038. KSI, 214. GPA K' = 273.9 KSI, 1888.MPA #YIELD,0.2%= 110. KSI, 760. MPA N' = 0.1836 #ULT. STRG.= 163. KSI, 1124. MPA F. STRG COEF= 218.4 KSI, 1506.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.0907 #N = 0.0000 FAT DUCT COEF= 0.2912 #RED. IN AREA = 37.6 F.DUCT EXP, c=-0.4940 #T. FRAC. STG.= 121.8 KSI, 840. MPA Exp Cyc Yld = 88. Ksi, 603.MPA #T. FRAC. STR.= 0.500 Fit Cyc Yld = 87. Ksi, 603.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!! Short life and Fatigue limit points fitted manually FAC Jul09 #Stress_Units= MPa # Total Strain 2Nf Stress Mean Plastic Strain Initial # Amp Amp Stress Amp Elastic Mod. .50 1 840. 0. .4961 214000. #Fitted_point manually 0.01035 2000 759.6 0. 0.00680 214000. #Fitted_point 0.00759 5000 697.4 0. 0.00433 214000. #Fitted_point 0.00613 10000 653.9 0. 0.00308 214000. #Fitted_point 0.00505 20000 613.1 0. 0.00219 214000. #Fitted_point 0.00403 50000 563.2 0. 0.00140 214000. #Fitted_point 0.00346 100000 528.4 0. 0.00100 214000. #Fitted_point 0.00303 200000 495.8 0. 0.00071 214000. #Fitted_point 0.00259 500000 455.9 0. 0.00046 214000. #Fitted_point 0.00259 10000000 455.9 0. 0.00046 214000. #Fitted_point manually #