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MMPDS-01 31 January 2003 Table 2.3.1.0(c 4 ). Design Mechanical and Physical Properties of Air Melted Low-Alloy Steels Alloy ................... AISI 4135 Specification [see Tables 2.3.1.0(a) and (b)] ......... Form.................... Condition ................ AMS-T-6735 Tubing Quenched and tempered a Wall thickness, in. ......... #0.8 < 0.5 b Basis.................... S S S S Mechanical Properties: F tu , ksi ................. 125 150 180 200 F ty , ksi ................. 100 135 165 165 F cy , ksi ................. 109 141 173 181 F su , ksi ................. 75 90 108 120 F bru , ksi: (e/D = 1.5)............. 194 231 277 308 (e/D = 2.0)............. 251 285 342 380 F bry , ksi: (e/D = 1.5)............. 146 210 257 274 (e/D = 2.0)............. 175 232 284 302 e, percent ............... See Table 2.3.1.0(e) E, 10 3 ksi ............... 29.0 E c , 10 3 ksi .............. 29.0 G, 10 3 ksi............... 11.0 µ ..................... 0.32 Physical Properties: ω, lb/in. 3 ............... 0.283 C, K, and α ............. See Figure 2.3.1.0 a Design values are applicable only to parts for which the indicated F tu and through hardening has been substantiated by adequate quality control testing. b Wall thickness at which through hardening is achieved and verified through quality control testing. b The S-basis value in MIL-T-6735 is 165 ksi. 2-20
MMPDS-01 31 January 2003 Table 2.3.1.0(d). Minimum Elongation Values for Low-Alloy Steels in Condition N Elongation, percent Form Thickness, in. Full tube Strip Sheet, strip, and plate (T) ...... Less than 0.062 ............... -- 8 Over 0.062 to 0.125 incl. ........ -- 10 Over 0.125 to 0.187 incl. ........ -- 12 Over 0.187 to 0.249 incl. ........ -- 15 Over 0.249 to 0.749 incl. ........ -- 16 Over 0.749 to 1.500 incl. ........ -- 18 Tubing (L) ................. Up to 0.035 incl. (wall) ......... 10 5 Over 0.035 to 0.188 incl. ........ 12 7 Over 0.188 ................... 15 10 Table 2.3.1.0(e). Minimum Elongation Values for Heat-Treated Low-Alloy Steels Elongation in 2 in., percent Round specimens (L) Sheet specimens Tubing (L) F tu , ksi Elongation in 4D, percent Reduction of area, percent Less than 0.032 in. thick 0.032 to 0.060 in. thick Over 0.060 in. thick Full tube 125 17 55 5 7 10 12 7 140 15 53 4 6 9 10 6 150 14 52 4 6 9 10 6 160 13 50 3 5 8 9 6 180 12 47 3 5 7 8 5 200 10 43 3 4 6 6 5 Strip 2-21
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Page 11 and 12: MMPDS-01 31 January 2003 Heat Treat
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Page 17 and 18: MMPDS-01 31 January 2003 Table 2.3.
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MMPDS-01 31 January 2003 100 Streng
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MMPDS-01 31 January 2003 Table 2.4.
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MMPDS-01 31 January 2003 100 80 F s
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MMPDS-01 31 January 2003 2.4.3 9Ni-
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MMPDS-01 31 January 2003 9 8 α - B
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MMPDS-01 31 January 2003 200 180 Mo
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