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7175-T74 Hand forging: MIL-HDBK-5J Design Allowables

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Material class	Aluminum
Alloy / temper / form	7175 / T74 / Hand forging
Specifications	AMS 4149 and AMS-A-22771
Handbook	MIL-HDBK-5J, 31 January 2003, section 3.7.8.0, Table 3.7.8.0(c) (pdf page 441 of the chapter file)
Dimension bands	5
Density	0.101 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		1.001–2.000 in	2.001–3.000 in	3.001–4.000 in	4.001–5.000 in	5.001–6.000 in
Specification		AMS 4149 and AMS-A-22771	AMS 4149 and AMS-A-22771	AMS 4149 and AMS-A-22771	AMS 4149 and AMS-A-22771	AMS 4149 and AMS-A-22771
Basis		S	S	S	S	S
F_tu, ksi	L	73	73	71	68	65
	LT	71	71	70	67	64
	ST	…	69	68	66	63
F_ty, ksi	L	63	63	61	57	54
	LT	60	60	58	56	52
	ST	…	60	57	55	52
F_cy, ksi	L	63	63	61	59	55
	LT	62	63	61	60	56
	ST	61	62	60	59	55
F_bru (e/D = 1.5), ksi	L	106	106	104	100	95
	LT	106	106	104	100	95
	ST	106	106	104	100	95
F_bru (e/D = 2.0), ksi	L	138	138	136	131	125
	LT	138	138	136	131	125
	ST	138	138	136	131	125
F_bry (e/D = 1.5), ksi	L	73	78	80	81	76
	LT	73	78	80	81	76
	ST	73	78	80	81	76
F_bry (e/D = 2.0), ksi	L	89	94	95	95	90
	LT	89	94	95	95	90
	ST	89	94	95	95	90
e, %	L	9	9	9	8	8
	LT	5	5	5	5	5
	ST	…	4	4	4	4
E, Msi		10.2	10.2	10.2	10.2	10.2
E_c, Msi		10.6	10.6	10.6	10.6	10.6
G, Msi		3.9	3.9	3.9	3.9	3.9
ν		0.33	0.33	0.33	0.33	0.33
ρ, lb/in3		0.101	0.101	0.101	0.101	0.101

Effect of Temperature

The handbook maps no temperature-effect figure to this table.

Other 7175 Tables

7175-T66 Die forging (Table 3.7.8.0(b))
7175-T73511 Extrusion (Table 3.7.8.0(d))
7175-T7452 Hand forging (Table 3.7.8.0(c))
7175-T74a,b Die forging (Table 3.7.8.0(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from the chapter tables; check the printed table before use in a certified analysis, and note that MIL-HDBK-5J was superseded by MMPDS, whose later editions may differ.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.