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Inconel 718-Solution treated and aged per indicated specificat Bar: MIL-HDBK-5J Design Allowables

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Material class	Heat-Resistant
Alloy / temper / form	Inconel 718 / Solution treated and aged per indicated specificat / Bar
Specifications	AMS 5662 and AMS 5663; AMS 5664
Handbook	MIL-HDBK-5J, 31 January 2003, section 6.3.5.0, Table 6.3.5.0(c) (pdf page 53 of the chapter file)
Dimension bands	8
Density	8221 kg/m³

Design Mechanical and Physical Properties (room temperature)

Converted from the handbook table (ksi, Msi, lb/in³) and rounded to 4 significant figures; dimension bands in inches with mm in parentheses. 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		0–10 in (0–254 mm)	0.250–1.000 in (6.35–25.4 mm)	1.001–1.500 in (25.43–38.1 mm)	1.501–2.000 in (38.13–50.8 mm)	2.001–2.500 in (50.83–63.5 mm)	2.501–3.000 in (63.53–76.2 mm)	3.001–4.000 in (76.23–101.6 mm)	4.001–5.000 in (101.6–127 mm)
Specification		AMS 5664	AMS 5662 and AMS 5663	AMS 5662 and AMS 5663	AMS 5662 and AMS 5663	AMS 5662 and AMS 5663	AMS 5662 and AMS 5663	AMS 5662 and AMS 5663	AMS 5662 and AMS 5663
Basis		S	S	S	S	S	S	S	S
F_tu, MPa	L	1276	1276	1276	1276	1276	1276	1276	1276
	LT	1241	1241	1241	1241	1241	1241	1241	1241
	ST	…	…	…	…	…	1241	1241	1241
F_ty, MPa	L	1034	1034	1034	1034	1034	1034	1034	1034
	LT	1034	1034	1034	1034	1034	1034	1034	1034
	ST	…	…	…	…	…	1007	1034	1034
F_cy, MPa	L	…	1076	1076	1076	1076	1076	1076	1076
	LT	…	…	…	…	…	…	…	…
	ST	…	…	…	…	1076	1076	1076	1076
F_su, MPa	L	…	765.3	786	799.8	813.6	820.5	834.3	848.1
	LT	…	765.3	786	799.8	813.6	820.5	834.3	848.1
	ST	…	…	…	…	813.6	820.5	834.3	848.1
F_bru (e/D = 1.5), MPa	L	…	2130	2130	2130	2130	2130	2130	2130
	LT	…	2130	2130	2130	2130	2130	2130	2130
	ST	…	…	…	…	2130	2130	2130	2130
F_bru (e/D = 2.0), MPa	L	…	2717	2717	2717	2717	2717	2717	2717
	LT	…	2717	2717	2717	2717	2717	2717	2717
	ST	…	…	…	…	2717	2717	2717	2717
F_bry (e/D = 1.5), MPa	L	…	1489	1489	1489	1489	1489	1489	1489
	LT	…	1489	1489	1489	1489	1489	1489	1489
	ST	…	…	…	…	1489	1489	1489	1489
F_bry (e/D = 2.0), MPa	L	…	1772	1772	1772	1772	1772	1772	1772
	LT	…	1772	1772	1772	1772	1772	1772	1772
	ST	…	…	…	…	1772	1772	1772	1772
e, %	L	10	12	12	12	12	12	12	12
	LT	10	6	6	6	6	6	6	6
	ST	…	…	…	…	…	6	6	6
E, GPa		202.7	202.7	202.7	202.7	202.7	202.7	202.7	202.7
E_c, GPa		213	213	213	213	213	213	213	213
G, GPa		78.6	78.6	78.6	78.6	78.6	78.6	78.6	78.6
ν		0.29	0.29	0.29	0.29	0.29	0.29	0.29	0.29
ρ, kg/m³		8221	8221	8221	8221	8221	8221	8221	8221

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

°C	F_tu	F_ty
-184	115.8	115.8
-129	111.1	111.1
-73	106.6	106.6
-18	102.5	102.5
38	99.8	99.8
93	97.2	97.2
149	95.9	95.9
204	94.5	94.5
26	93.8	93.8
316	92.8	92.8
371	92.1	92.1
427	91.2	91.2
538	89.3	89.3
649	80.6	80.6

Factors in percent of the room-temperature allowable.

Other Inconel 718 Tables

Inconel 718-Solution treated and aged per indicated specificat Forging (Table 6.3.5.0(c))
Inconel 718-Solution treated and aged per indicated specificat Plate (Table 6.3.5.0(b))
Inconel 718-Solution treated and aged per indicated specificat Sheet (Table 6.3.5.0(b))
Inconel 718-Solution treated and aged per indicated specificat Sheet and plate (Table 6.3.5.0(b))
Inconel 718-Solution treated and aged per indicated specificat Tubing (Table 6.3.5.0(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.