Table 3.7.8.0: (b). Design Mechanical and Physical Properties of 7175 Aluminum Alloy Die Forging · MIL-HDBK-5J

Specification	AMS 4148	AMS 4149
Form	Die forging
Temper	T66	T74^a,b
Thickness, in.	≤3.000	<1.000	1.001- 2.000		2.001- 3.000	3.001- 4.000	4.001- 5.000	5.001- 6.000
Basis	S	S	A	B	S	S	S	S
Mechanical Properties:
F_tu, ksi:
L	86	76	74	77	76	73	70	68
T^c	77	71	71^d		71	70	68	65
F_ty, ksi:
L	76	66	64	67	66	63	61	58
T^c	66	62	62^d		62	60	58	55
F_cy, ksi:
L		67	65	68	67
ST		63	61	64	63
F_su, ksi		43	42	44	43
F_bru^e, ksi:
(e/D = 1.5)		106	105	109	106
(e/D = 2.0)		140	137	142	140
F_bry^e, ksi:
(e/D = 1.5)		86	84	88	86
(e/D=2.0)		102	99	103	102
e, percent (S-basis):
L	7	7	7		7	7	7	7
T^c		4	4		4	4	4	4
E, 10³ ksi					10.2
E_c, 10³ ksi					10.7
G, 10³ ksi					3.9
μ					0.33
Physical Properties:
ω, lb/in.³					0.101
C, Btu/(lb)(°F)					0.23 (at 212°F)
K, Btu/[(hr)(ft²)(°F)/ft]					76 (at 77°F for T66); 90 (at 77°F for T736)
α, 10^-6 in./in./°F					12.9 (68 to 212°F)

a When die forgings are machined before heat treatment, section thickness at time of heat treatment will determine minimum mechanical properties as long as original (as-forged) thickness does not exceed maximum thickness for the alloy as shown in the table.
b Design allowables were based upon data obtained from testing die forgings, heat treated by suppliers, and supplied in T74 temper.
c T indicates any grain direction not within ±15° of being parallel to the forging flow lines. Fcy(T) values are based upon short transverse (ST) test data.
d Specification value. T tensile properties are presented on an S basis only.
e Bearing values are "dry pin" values per Section 1.4.7.1.

MIL-HDBK-5J

3.7.8.0 (c₁). Design Mechanical and Physical Properties of 7175 Aluminum Alloy Hand Forging

Specification	AMS 4149 and AMS-A-22771
Form	Hand forging
Temper	T74
Thickness or Diameter^a,b, in.	1.001-2.000	2.001-3.000	3.001-4.000	4.001-5.000	5.001-6.000
Basis	S	S	S	S	S
Mechanical Properties:
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_su, ksi:
L	43	43	43	41	39
LT	42	42	41	39	38
ST	42	42	41	39	38
F^c_bru, ksi:
(e/D = 1.5)	106	106	104	100	95
(e/D = 2.0)	138	138	136	131	125
F^c_bry, ksi:
(e/D= 1.5)	73	78	80	81	76
(e/D = 2.0)	89	94	95	95	90
e, percent:
L		9	9
LT	5			5	5
ST		4	4	4	4
E, 10³ ksi	10.2
E_c, 10³ ksi	10.6
G, 10³ ksi	3.9
μ	0.33
Physical Properties:
ω, lb/in.³	0.101
C, Btu/(lb)(°F)	0.23 (at 212°F)
K, Btu/[(hr)(ft²)(°F)/ft]	90 (at 77°F)
α 10^-6 in./in./°F	12.9 (68 to 212°F)

a When hand forgings are machined before heat treatment, the section thickness at time of heat treatment will determine the minimum mechanical properties as long as the original (as-forged) thickness does not exceed the maximum thickness for the alloy as shown in the table.

b The maximum cross-sectional area of hand forgings in 256 sq. in.
c Bearing values are “dry pin” values per Section 1.4.7.1.

MIL-HDBK-5J

3.7.8.0 (c₂). Design Mechanical and Physical Properties of 7175 Aluminum Alloy Hand Forging

Specification	AMS 4149 and AMS-A-22771
Form	Hand forging
Temper	T7452
Thickness or Diameter^a, in.	1.001- 2.000	2.001- 3.000	3.001- 4.000	4.001- 5.000	5.001- 6.000
Basis	S	S	S	S	S
Mechanical Properties:
F_tu, ksi:
L	71	71	68	65	63
LT	69	69	67	64	61
ST		67	65	63	60
F_ty, ksi:
L	61	61	57	54	51
LT	58	58	55	52	49
ST		54	51	49	46
F_cy, ksi:
L	58	58	55	52	49
LT	61	61	57	54	50
ST		60	57	54	51
F_su, ksi:
L	38	39	39	38	37
LT	38	39	38	38	36
ST	40	41	40	39	38
F^b_bru, ksi:
(e/D = 1.5)	102	102	99	95	90
(e/D = 2.0)	133	133	130	124	118
F_bry, ksi:
(e/D = 1.5)	80	82	80	76	72
(e/D = 2.0)	95	98	95	92	87
e, percent:
L	9	9	9	8	8
LT	5	5	5	5	5
ST		4	4	4	4
E, 10³ ksi	10.2
E_c, 10³ ksi	10.5
G, 10³ ksi	3.9
μ	0.33
Physical Properties:
ω, lb/in.³	0.101
C, Btu/(lb)(°F)	0.23 (at 212°F)
K, Btu/[(hr)(ft²)(°F)/ft]	90 (AT 77°F)
a, 10^-6 in./in./°F	12.9 (68 to 212°F)

MIL-HDBK-5J

3.7.8.0 (d). Design Mechanical and Physical Properties of 7175 Aluminum Alloy Extrusion

Specification	AMS 4344
Form	Extrusion
Condition	T73511
Cross-Sectional Area, in²	32-65
Thickness or Diameter,^a in.	0.250-0.999	1.000-2.000
Basis	S	S
Mechanical Properties:
F_tu, ksi:
L	69	69
LT	63	63
F_ty, ksi:
L	59	59
LT	52	52
F_cy, ksi:
L		59
LT		59
F_su, ksi		40
F_bru^b, ksi:
(e/D = 1.5)		97
(e/D = 2.0)		125
F_bry^b, ksi:
(e/D = 1.5)		79
(e/D = 2.0)		95
e, percent:
L		8
LT		4
E, 10³ ksi	10.1
E_c, 10³ ksi	10.5
G, 10³ ksi	3.9
μ	0.33
Physical Properties:
ω, lb/in.³	0.101
C, Btu/(lb)(°F)	0.23 (at 212°F)
K, Btu/[(hr)(ft²)(°F)/ft]
α, 10^-6 in./in./°F	12.9 (68 to 212°F)

MIL-HDBK-5J

Specification

AMS 4148

AMS 4149

Form

Die forging

Temper

T66

T74^a,b

Thickness, in.

≤3.000

<1.000

1.001-
2.000

2.001-
3.000

3.001-
4.000

4.001-
5.000

5.001-
6.000

Basis

Mechanical Properties:

F_tu, ksi:

T^c

71^d

F_ty, ksi:

T^c

62^d

F_cy, ksi:

F_su, ksi

F_bru^e, ksi:

(e/D = 1.5)

106

105

109

106

(e/D = 2.0)

140

137

142

140

F_bry^e, ksi:

(e/D = 1.5)

(e/D=2.0)

102

103

102

e, percent (S-basis):

T^c

E, 10³ ksi

10.2

E_c, 10³ ksi

10.7

G, 10³ ksi

3.9

0.33

Physical Properties:

ω, lb/in.³

0.101

C, Btu/(lb)(°F)

0.23 (at 212°F)

K, Btu/[(hr)(ft²)(°F)/ft]

76 (at 77°F for T66); 90 (at 77°F for T736)

α, 10^-6 in./in./°F

12.9 (68 to 212°F)

3.7.8.0 (c₁). Design Mechanical and Physical Properties of 7175 Aluminum Alloy Hand Forging

Specification	AMS 4149 and AMS-A-22771
Form	Hand forging
Temper	T74
Thickness or Diameter^a,b, in.	1.001-2.000	2.001-3.000	3.001-4.000	4.001-5.000	5.001-6.000
Basis	S	S	S	S	S
Mechanical Properties:
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_su, ksi:
L	43	43	43	41	39
LT	42	42	41	39	38
ST	42	42	41	39	38
F^c_bru, ksi:
(e/D = 1.5)	106	106	104	100	95
(e/D = 2.0)	138	138	136	131	125
F^c_bry, ksi:
(e/D= 1.5)	73	78	80	81	76
(e/D = 2.0)	89	94	95	95	90
e, percent:
L		9	9
LT	5			5	5
ST		4	4	4	4
E, 10³ ksi	10.2
E_c, 10³ ksi	10.6
G, 10³ ksi	3.9
μ	0.33
Physical Properties:
ω, lb/in.³	0.101
C, Btu/(lb)(°F)	0.23 (at 212°F)
K, Btu/[(hr)(ft²)(°F)/ft]	90 (at 77°F)
α 10^-6 in./in./°F	12.9 (68 to 212°F)

b The maximum cross-sectional area of hand forgings in 256 sq. in.

c Bearing values are “dry pin” values per Section 1.4.7.1.

MIL-HDBK-5J

3.7.8.0 (c₂). Design Mechanical and Physical Properties of 7175 Aluminum Alloy Hand Forging

Specification	AMS 4149 and AMS-A-22771
Form	Hand forging
Temper	T7452
Thickness or Diameter^a, in.	1.001- 2.000	2.001- 3.000	3.001- 4.000	4.001- 5.000	5.001- 6.000
Basis	S	S	S	S	S
Mechanical Properties:
F_tu, ksi:
L	71	71	68	65	63
LT	69	69	67	64	61
ST		67	65	63	60
F_ty, ksi:
L	61	61	57	54	51
LT	58	58	55	52	49
ST		54	51	49	46
F_cy, ksi:
L	58	58	55	52	49
LT	61	61	57	54	50
ST		60	57	54	51
F_su, ksi:
L	38	39	39	38	37
LT	38	39	38	38	36
ST	40	41	40	39	38
F^b_bru, ksi:
(e/D = 1.5)	102	102	99	95	90
(e/D = 2.0)	133	133	130	124	118
F_bry, ksi:
(e/D = 1.5)	80	82	80	76	72
(e/D = 2.0)	95	98	95	92	87
e, percent:
L	9	9	9	8	8
LT	5	5	5	5	5
ST		4	4	4	4
E, 10³ ksi	10.2
E_c, 10³ ksi	10.5
G, 10³ ksi	3.9
μ	0.33
Physical Properties:
ω, lb/in.³	0.101
C, Btu/(lb)(°F)	0.23 (at 212°F)
K, Btu/[(hr)(ft²)(°F)/ft]	90 (AT 77°F)
a, 10^-6 in./in./°F	12.9 (68 to 212°F)

MIL-HDBK-5J

3.7.8.0 (d). Design Mechanical and Physical Properties of 7175 Aluminum Alloy Extrusion

Specification	AMS 4344
Form	Extrusion
Condition	T73511
Cross-Sectional Area, in²	32-65
Thickness or Diameter,^a in.	0.250-0.999	1.000-2.000
Basis	S	S
Mechanical Properties:
F_tu, ksi:
L	69	69
LT	63	63
F_ty, ksi:
L	59	59
LT	52	52
F_cy, ksi:
L		59
LT		59
F_su, ksi		40
F_bru^b, ksi:
(e/D = 1.5)		97
(e/D = 2.0)		125
F_bry^b, ksi:
(e/D = 1.5)		79
(e/D = 2.0)		95
e, percent:
L		8
LT		4
E, 10³ ksi	10.1
E_c, 10³ ksi	10.5
G, 10³ ksi	3.9
μ	0.33
Physical Properties:
ω, lb/in.³	0.101
C, Btu/(lb)(°F)	0.23 (at 212°F)
K, Btu/[(hr)(ft²)(°F)/ft]
α, 10^-6 in./in./°F	12.9 (68 to 212°F)