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MMPDS-01 31 January 2003 Figure 2.3.1.2.8(h). Best-fit S/N curves for notched, K t = 4.0, 4130 alloy steel sheet, F tu = 180 ksi, longitudinal direction. Correlative Information for Figure 2.3.1.2.8(h) Product Form: Sheet, 0.075 inch thick Properties: TUS, ksi TYS, ksi Temp., EF 180 174 RT Specimen Details: Surface Condition: Reference: Edge Notched 2.25 inches gross width 1.50 inches net width 0.057 inch notch radius Electropolished 3.2.3.1.8(f) Test Parameters: Loading - Axial Frequency - 23-1800 cpm Temperature - RT Environment - Air No. of Heats/Lots: Not specified Equivalent Stress Equation: Log N f = 12.4-4.45 log (S eq ) S eq = S max (1-R) 0.60 Std. Error of Estimate, Log (Life) = 0.11 Standard Deviation, Log (Life) = 0.90 R 2 = 98% Sample Size = 20 [Caution: The equivalent stress model may provide unrealistic life predictions for stress ratios beyond those represented above.] 2-38
MMPDS-01 31 January 2003 200 200-ksi level 180-ksi level 150 140-ksi level Stress, ksi 100 50 TYPICAL 0 0 2 4 6 8 10 12 Strain, 0.001 in./in. Figure 2.3.1.3.6(a). Typical tensile stress-strain curves at room temperature for heattreated AISI 4340 alloy steel (all products). 300 250 Longitudinal 1/2-hr exposure -312 °F -110 °F RT 200 Stress, ksi 150 100 50 Ramberg-Osgood n (RT) = 7.0 n (-110 °F) = 8.2 n (-312 °F) = 8.9 TYPICAL 0 0 2 4 6 8 10 12 Strain, 0.001 in./in. Figure 2.3.1.3.6(b). Typical tensile stress-strain curves at cryogenic and room temperature for AISI 4340 alloy steel bar, F tu = 260 ksi. 2-39
Page 1 and 2: MMPDS-01 31 January 2003 CHAPTER 2
Page 3 and 4: MMPDS-01 31 January 2003 and above
Page 5 and 6: MMPDS-01 31 January 2003 2.1.2.1.4
Page 7 and 8: MMPDS-01 31 January 2003 2.2.0.3 En
Page 9 and 10: MMPDS-01 31 January 2003 9 α, - Be
Page 11 and 12: MMPDS-01 31 January 2003 Heat Treat
Page 13 and 14: MMPDS-01 31 January 2003 Figure 2.3
Page 15 and 16: MMPDS-01 31 January 2003 2.3.1 SPEC
Page 17 and 18: MMPDS-01 31 January 2003 Table 2.3.
Page 27 and 28: MMPDS-01 31 January 2003 200 180 St
Page 29 and 30: MMPDS-01 31 January 2003 120 110 E
Page 37: . . MMPDS-01 31 January 2003 140 12
Page 43 and 44: MMPDS-01 31 January 2003 300 B = 2
Page 59 and 60: . . MMPDS-01 31 January 2003 Maximu
Page 71 and 72: MMPDS-01 31 January 2003 100 Streng
Page 73 and 74: . MMPDS-01 31 January 2003 100 80 P
Page 77 and 78: MMPDS-01 31 January 2003 100 80 F s
Page 79 and 80: MMPDS-01 31 January 2003 2.4.3 9Ni-
Page 81 and 82: MMPDS-01 31 January 2003 9 8 α - B
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Page 85 and 86: MMPDS-01 31 January 2003 200 180 Mo
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MMPDS-01 31 January 2003 6KRUW WUD
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