# # Fitted curve # Merged SAE 4140 Bhn 350 to 394 # aisiIt064sae4140_Bhn381.html aisiIt068sae4140_Bhn353.html # aisiIt093sae4140_Bhn353.html aisiIt069sae4140_Bhn371.html # aisiIt067sae4140_Bhn381.html aisiIt097sae4140_Bhn385.html # aisiIt066sae4140_Bhn390.html aisiIt080sae4140_Bhn394.html # saedigcurve_v2.2.f starts. #FileType= strain_life #DataType= fitted #Name= SAE4140 #Name= AisiMerged #Name= Bhn350-394 #Stress_units= MPa #Strain_units= strain #Su= 1416 (average) Range from 1239 to 1537mpa #Sy= 1295 (average) Rg: 1167 to 1363 #E= 202000 (average) #BHN= 374 (average) # SAE4140 AisiMerged BHN= 374 Fn= 0 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 29298. KSI, 202. GPA K' = 208.8 KSI, 1439.MPA #YIELD,0.2%= 188. KSI, 1295. MPA N' = 0.0799 #ULT. STRG.= 205. KSI, 1416. MPA F. STRG COEF= 206.3 KSI, 1422.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.0548 #N = 0.0000 FAT DUCT COEF= 0.8594 #RED. IN AREA = 0.0 F.DUCT EXP, c=-0.6858 #T. FRAC. STG.= 0.0 KSI, 0. MPA Exp Cyc Yld = 127. Ksi, 876.MPA #T. FRAC. STR.= 0.000 Fit Cyc Yld = 127. Ksi, 875.MPA #No. fatigue data points= 161 # # NOTE!! The Following Points are <b>FITTED DATA:</b>#NOTE!! Fitted Stress computed using Experm. K' and n' # NOTE!! Longer life points adjusted manually. FAC Jun09 #Stress_Units= MPa # Total Strain 2Nf Stress Mean Plastic Strain Initial # Amp Amp Stress Amp Elastic Mod. 0.86643 1 1384.7 0. 0.85957 202000. #Fitted_point 0.54102 2 1335.8 0. 0.53441 202000. #Fitted_point 0.29143 5 1273.8 0. 0.28513 202000. #Fitted_point 0.18337 10 1228.8 0. 0.17729 202000. #Fitted_point 0.11611 20 1185.4 0. 0.11024 202000. #Fitted_point 0.06443 50 1130.4 0. 0.05884 202000. #Fitted_point 0.04199 100 1090.6 0. 0.03659 202000. #Fitted_point 0.02797 200 1052.1 0. 0.02276 202000. #Fitted_point 0.01712 500 1003.3 0. 0.01215 202000. #Fitted_point 0.01235 1000 967.9 0. 0.00756 202000. #Fitted_point 0.00932 2000 933.7 0. 0.00470 202000. #Fitted_point 0.00691 5000 890.3 0. 0.00250 202000. #Fitted_point 0.00580 10000 858.7 0. 0.00155 202000. #Fitted_point 0.00506 20000 827.9 0. 0.00096 202000. #Fitted_point 0.00441 50000 788.5 0. 0.00050 202000. #Fitted_point .0038 100000 744 0. .0002 202000. #Fitted_point manually .003 1000000 601. 0. .00001 202000. #Fitted_point manually .003 10000000 601. 0. .00001 202000. #Fitted_point manually #