Table 3.9.4.0: (b). Design Mechanical and Physical Properties of 356.0 Aluminum Alloy

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

Last Updated 29 Oct 2026

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Specification	AMS 4217	AMS 4260	AMS 4284
Form	Sand casting	Investment casting	Permanent mold casting

Temper	T6	T6	T6
Location Within Casting	Thick and thin areas	As specified	As specified
Basis	S	S	S

Mechanical Properties:
F_tu, ksi	22^a,b	25^a	25^a
F_ty, ksi	15^a,b	16^a	16^a
F_cy, ksi	15	16	16
F_su, ksi	14	16	16
F_bru^c, ksi:
(e/D = 1.5)	38	43	43
(e/D = 2.0)	47	53	53
F_bry^c, ksi:
(e/D = 1.5)	24	25	25
(e/D = 2.0)	28	30	30
e, percent	0.7^a,b	1^a	0.7^a

E, 10³ ksi	10.3
E_c, 10³ ksi	10.3
G, 10³ ksi	3.85
μ	0.33

Physical Properties:
ω, lb/in.³	0.097
C, Btu/(lb)(°F)	0.23 (at 212°F)
K, Btu/[(hr)(ft²)(°F)/ft]	88 (at 77°F)
α, 10^-6 in./in./°F	See Figure 3.9.4.0

a Conformance to tensile property requirements is determined by testing specimens cut from casting only when specified on drawing.

MIL-HDBK-5J

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

Last Updated 29 Oct 2026

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Specification	AMS 4217	AMS 4260	AMS 4284
Form	Sand casting	Investment casting	Permanent mold casting

Temper	T6	T6	T6
Location Within Casting	Thick and thin areas	As specified	As specified
Basis	S	S	S

Mechanical Properties:
F_tu, ksi	22^a,b	25^a	25^a
F_ty, ksi	15^a,b	16^a	16^a
F_cy, ksi	15	16	16
F_su, ksi	14	16	16
F_bru^c, ksi:
(e/D = 1.5)	38	43	43
(e/D = 2.0)	47	53	53
F_bry^c, ksi:
(e/D = 1.5)	24	25	25
(e/D = 2.0)	28	30	30
e, percent	0.7^a,b	1^a	0.7^a

E, 10³ ksi	10.3
E_c, 10³ ksi	10.3
G, 10³ ksi	3.85
μ	0.33

Physical Properties:
ω, lb/in.³	0.097
C, Btu/(lb)(°F)	0.23 (at 212°F)
K, Btu/[(hr)(ft²)(°F)/ft]	88 (at 77°F)
α, 10^-6 in./in./°F	See Figure 3.9.4.0

a Conformance to tensile property requirements is determined by testing specimens cut from casting only when specified on drawing.