10 fig2 illustrates graphically the effect on tensile strength of varying the nickel content in an fe 0 5 mo 0 9 c system in the lower portion of fig2 varying the nickel content from 4 to 12 results in a drop in uts from a maximum of 100 000 psi as nickel content increases beyond about 8 after cryogenic processing higher nickel content has a much different effect the tensile strength increases rapidly from about 100 000 psi at 4 nickel to a maximum of about 190 000 psi at about 10 nickel and then begins to decrease the results are good in the range of 8 to 12 nickel the molybdenum content also enhances the mechanical properties as can be seen in fig3 an fe 10 ni 0 9 c alloy system with mo content varying from 0 to 0 5 is illustrated after sintering the uts remained below 100 000 psi as molybdenum content was varied from 0 to 0 5 however as shown in the upper portion of fig3 increasing the molybdenum content improved tensile strength after cryogenic processing increasing from about 150 000 psi at 0 to a maximum of about 190 000 psi at the optimum molybdenum.