# # AISI 4120 Modified Steel Simul.Carbur.Core AISI It198 HRc= 34.7 # Specimens were heated to Carb. Temperature of 1900F and then Quench+Temp # Original Chem: .20C .83Mn .009P .008S .31Si .85Cr .15Ni .20Mo # .20Cu .040Al .0006Ca .0010Pb Source: Chrysler # Tested by W.H.Liang U.Waterloo Jun 2018 # #FileType= strain_life #DataType= raw #TIMEcol= 0 #NAME= SAE4120mod #NAME= AisiIter198 #NAME= SimulCarburCore #Stress_units= mpa #Strain_units= strain #Sy= 1131. mpa #Su= 1528. mpa average of 2 tests #eu= 0.050 #strain at ultimate #E= 214474. mpa ##monotonic_K= 2684 mpa ##monotonic_n= 0.143 #TrueFractureStrain= 0.244 avg. of 2 #TrueFractureStress= 2541 #%RA= 0.526 avg #%Elongation= 24.4 over 0.3 inch G.L. #BHN= 327 conv. from HRc=34.7 #Modulus below observed at low stress level on initial #loading in tension. #StrAmpl 2Nf StsAmpl So PlsStrAmp 1stLoadEmod 0.01254 368 1326 -51 0.005914 200039 1823 10 0.00954 1910 1154 -30 0.003997 208172 1514 14 0.00858 2372 1148 -32 0.003179 212571 1447 12 0.00684 4744 1043 -22 0.001993 215078 1238 16 0.00708 5582 1070 -42 0.002083 214078 1273 15 0.00678 6114 1062 -42 0.001864 216124 1248 20 0.00543 21130 933 -21 0.000585 192642 988 18 0.00509 30670 952 -63 0.000694 216516 1024 17 0.00400 73228 807 1 0.000171 210860 825 19 0.00404 100198 860 -82 0.000055 215808 866 8 0.00363 120900 750 7 0.000092 212015 760 2 0.00303 518944 660 45 0.000118 226637 673 1 0.00250 585148 516 -79 0.000018 207798 518 3 0.00275 971072 621 -16 -0.000161 213363 604 3 0.00280 10000000 616 -67 0.000051 223956 621 11 0.00254 10000000 521 38 0.000110 214291 532 9 #runout 0.00244 10000000 515 -31 -0.000021 209387 513 7 #runout 0.00239 10000000 471 40 0.000178 213051 490 4 #runout # #