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Inconel X-750-Equalized and aged Bars and forgings: MIL-HDBK-5J Design Allowables

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Material class	Heat-Resistant
Alloy / temper / form	Inconel X-750 / Equalized and aged / Bars and forgings
Specifications	AMS 5667
Handbook	MIL-HDBK-5J, 31 January 2003, section 6.3.6.0, Table 6.3.6.0(b) (pdf page 78 of the chapter file)
Dimension bands	2
Density	0.298 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		0–4 in	4–10 in
Specification		AMS 5667	AMS 5667
Basis		S	S
F_tu, ksi	L	165	160
F_ty, ksi	L	105	100
F_cy, ksi	L	105	100
F_su, ksi	L	102	99
F_bru (e/D = 1.5), ksi	L	247	240
F_bru (e/D = 2.0), ksi	L	313	304
F_bry (e/D = 1.5), ksi	L	157	150
F_bry (e/D = 2.0), ksi	L	189	180
e, %	L	20	15
E, Msi		30.6	30.6
E_c, Msi		30.6	30.6
G, Msi		11.8	11.8
ν		0.3	0.3
ρ, lb/in3		0.298	0.298

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_cy	F_su	F_bru	F_bry
100	99	98.9	98.9	99.3	99.3
200	96.7	97.9	95.6	97.4	99.1
300	94.7	95.9	92.9	95	98.5
400	92.7	93.9	90.8	92.4	98.1
500	91.5	90.7	90.7	90	97.7
600	90	89.9	88	87.5	97.1
700	89.5	88.8	84.6	84.3	96.6
800	89	86.9	80.4	80.7	96
1000	87	80.7	68.4	73.6	89.7
1200	74.6	71		63.6	76.4

Factors in percent of the room-temperature allowable.

Other Inconel X-750 Tables

Inconel X-750-Annealed and aged Plate (Table 6.3.6.0(b))
Inconel X-750-Annealed and aged Sheet (Table 6.3.6.0(b))
Inconel X-750-Annealed and aged Strip (Table 6.3.6.0(b))

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from the chapter tables; check the printed table before use in a certified analysis, and note that MIL-HDBK-5J was superseded by MMPDS, whose later editions may differ.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.