Table 3.2.7.0: (b). Design Mechanical and Physical Properties of 2124 Aluminum Alloy Plate

MIL-HDBK-5J, Metallic Materials and Elements for Aerospace Vehicle Structures

Last Updated 29 Oct 2026

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Specification…	AMS 4101 and AMS-QQ-A-250/29
Form…	Plate
Temper…	T851
Thickness, in.	1.000- 1.500		1.501- 2.000		2.001- 3.000		3.001- 4.000		4.001- 5.000		5.001- 6.000
Basis…	S	A	B	A	B	A	B	A	B	A	B
Mechanical Properties:
F_u, ksi:
L…	66	66	68	65	68	65	67	64	66	63	65
LT…	66	66	68	65	68	65	67	64	66	63	65
ST…	64^a	64	66	63	64	62	63	61	62	58	59
F_ty, ksi:
L…	57	57	61	57	61	56	60	55	58	54	56
LT…	57	57	61	57	61	56	60	55	58	54	56
ST…	55^a	55	59	55	59	54	57	53	55	51	53
F_cy, ksi:
L…	57	57	61	56	60	55	59	53	56	52	54
LT…	57	57	61	57	61	56	60	55	58	54	56
ST…	57	57	61	58	62	57	61	57	60	56	58
F_su, ksi:
L…		38	39	38	39	38	39	37	38	37	38
LT…		38	39	38	39	38	39	37	38	37	38
ST…		36	37	36	37	36	37	35	36	35	36
F_bru, ksi:
(e/D = 1.5)…		97	100	96	100	96	99	94	97	93	96
(e/D = 2.0)…		126	130	125	130	125	128	123	126	121	125
F_bry, ksi:
(e/D = 1.5)…		79	84	80	85	80	85	79	84	79	82
(e/D = 2.0)…		91	98	92	99	92	99	92	97	91	95
e, percent (S-basis):
L…	6		6		5				5
LT…	5		5		4				4
ST…	1.5^a	1.5		1.5		1.5		1.5		1.5
E, 10³ ksi…										10.4
E_c, 10³ ksi…										10.9
G, 10³ ksi…										4.0
μ…										0.33
Physical Properties:
w, lb/in.³…											0.100
C, Btu/(lb)(°F)…											0.21 (at 212°F)
K, Btu/[(hr)(ft³)(°F)/ft]…											87 (at 77°F)
a, 10^-6 in./in./°F…											12.6 (68°F to 212°F)

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