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Ti-6Al-6V-2Sn-Air-cool annealed Bar: MIL-HDBK-5J Design Allowables

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Material class	Titanium
Alloy / temper / form	Ti-6Al-6V-2Sn / Air-cool annealed / Bar
Specifications	AMS 4978
Handbook	MIL-HDBK-5J, 31 January 2003, section 5.4.2.0, Table 5.4.2.0(c) (pdf page 95 of the chapter file)
Dimension bands	3
Density	0.164 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		0.000–1.500 in		1.501–3.000 in		3.001–4.000 in
Specification		AMS 4978		AMS 4978		AMS 4978
Basis		A	B	A	B	A	B
F_tu, ksi	L	144	150	139	145	136	142
F_tu, ksi	LT	147	152	143	148	140	145
F_ty, ksi	L	131	138	126	132	123	129
F_ty, ksi	LT	136	141	131	136	127	132
e, %	L	10	10	10	10	10	10
e, %	LT	8	8	8	8	8	8
E, Msi		16	16	16	16	16	16
E_c, Msi		16.4	16.4	16.4	16.4	16.4	16.4
G, Msi		6.2	6.2	6.2	6.2	6.2	6.2
ν		0.31	0.31	0.31	0.31	0.31	0.31
ρ, lb/in3		0.164	0.164	0.164	0.164	0.164	0.164

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

°F	F_tu	F_ty	F_cy	F_su	F_bru	F_bry
100	97.8	97.8	97.7	97.7	97.7	97.7
200	91.7	89.6	88.5	91.6	91.3	89.8
300	86.5	82.7	81.8	85.4	86	83.1
400	82.6	77.6	75.7	80.4	81.5	78
500	79.1	72.6	71.2	76.3	77.5	74.1
600	76.2	68.6	67.5	73.5	74.3	70.6
700	73.7	64.6	64.3	71.4	71.1	67.7

Factors in percent of the room-temperature allowable.

Other Ti-6Al-6V-2Sn Tables

Ti-6Al-6V-2Sn-Annealed Extruded bar and shapes (Table 5.4.2.0(e))
Ti-6Al-6V-2Sn-Annealed Forging (Table 5.4.2.0(d))
Ti-6Al-6V-2Sn-Annealed Sheet, strip, and plate (Table 5.4.2.0(b))
Ti-6Al-6V-2Sn-Solution treated and aged Bar and forging (Table 5.4.2.0(c))
Ti-6Al-6V-2Sn-Solution treated and aged Extruded bar and shapes (Table 5.4.2.0(e))
Ti-6Al-6V-2Sn-Solution treated and aged Sheet, strip, and plate (Table 5.4.2.0(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.