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applicable strength levels-Quenched and tempered (125 ksi) All wrought forms: MIL-HDBK-5J Design Allowables

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Material class	Steel
Alloy / temper / form	applicable strength levels / Quenched and tempered (125 ksi) / All wrought forms
Specifications	See Tables 2.3.1.0(a) and (b)
Handbook	MIL-HDBK-5J, 31 January 2003, section 2.3.1.0, Table 2.3.1.0(g) (pdf page 25 of the chapter file)
Dimension bands	1
Density	0.283 lb/in3

Design Mechanical and Physical Properties (room temperature)

As printed in the handbook table. Bases: A and B are statistical minimums (99 % and 90 % probability at 95 % confidence), S the specification minimum. Grain directions: L longitudinal, LT long transverse, ST short transverse.

Dimension band		0.000–2.500 in
Specification		See Tables 2.3.1.0(a) and (b)
Basis		S
F_tu, ksi		125
F_ty, ksi		100
F_cy, ksi		109
F_su, ksi		75
F_bru (e/D = 1.5), ksi		209
F_bru (e/D = 2.0), ksi		251
F_bry (e/D = 1.5), ksi		146
F_bry (e/D = 2.0), ksi		175
e, %		10
E, Msi		29
E_c, Msi		29
G, Msi		11
ν		0.32
ρ, lb/in3		0.283

Effect of Temperature

Percent of the room-temperature value against temperature, digitized from the handbook figures (the shortest exposure of each figure, every 10 °F). Strength curves give the allowable at temperature; "after exposure" curves give the room-temperature property after a soak at that temperature.

Strength allowables at temperature, percent of room temperature

Moduli at temperature

°F	F_tu	F_ty	F_cy	F_su	F_bru	F_bry
-100	105.2	106.7
0	101.3	102.8
100	99.2	98.8	98.6	99.5	99.8	99.3
200	98.1	94.8	91.1	97.3	97.4	96.6
300	96.7	90.8	86.7	96.2	96.5	95.5
400	95.1	86.9	83.8	95.5	96.1	94.3
500	92.4	82.9	81.5	94.2	95.4	93.8
600	88.9	78.9	78.6	91.6	91.4	91.7
700	83.4	74.4	74	86.5	83.7	86.9
800	76.9	68.4	65.7	77.4	74.5	77.9
1000	58	42.6		56.2	54.2	56.9
1200	35.2	23.1		37.2

Factors in percent of the room-temperature allowable.

Other applicable strength levels Tables

applicable strength levels-Quenched and tempered (140 ksi) All wrought forms (Table 2.3.1.0(g))
applicable strength levels-Quenched and tempered (150 ksi) All wrought forms (Table 2.3.1.0(g))
applicable strength levels-Quenched and tempered (160 ksi) All wrought forms (Table 2.3.1.0(g))
applicable strength levels-Quenched and tempered (180 ksi) All wrought forms (Table 2.3.1.0(g))
applicable strength levels-Quenched and tempered (200 ksi) All wrought forms (Table 2.3.1.0(g))

Source and Use

U.S. Department of Defense (2003). Metallic Materials and Elements for Aerospace Vehicle Structures. MIL-HDBK-5J, 31 January 2003 (public domain). The values are the handbook's design allowables as extracted from the chapter tables; check the printed table before use in a certified analysis, and note that MIL-HDBK-5J was superseded by MMPDS, whose later editions may differ. No warranty is given.