Table 2.6.4.0: (b). Design Mechanical and Physical Properties of Custom 455 Stainless Steel

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

Last Updated 29 Oct 2026

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Specification	AMS 5578		AMS 5617
Form	Tubing (Welded)		Bar
Condition	H950		H950		H1000
Thickness or diameter, in.ª	0.020-0.062	>0.062	<4.000	4.001-6.000	≤8.000
Basis	S	S	S	S	S
Mechanical Properties:
F_u ksi:
L	220	220	225	220	200
LT			225^b	220^b
ST			225^b	220^b
F_ty, ksi:
L	205	205	210	205	185
LT			210^b	205^b
ST			210^b	205^b
F_cy, ksi:
L			219	214	193
LT			219	214	193
ST			219	214	193
F_su ksi:
L			133	130	124
F_bru ksi:
(e/D = 1.5)			355	347	324
(e/D = 2.0)			450	440	409
F_bry ksi:
(e/D = 1.5)			311	303	285
(e/D = 2.0)			366	358	343
e, percent:
L	3	4	10	10	10
LT			5^b	5^b
ST			5^b	5^b
RA, percent:
L			40	40	40
LT			20^b	20^b
ST			20^b	20^b
E, 10³ ksi	28.5				28.9
E_c, 10³ ksi	30.0				30.0
G, 10³ ksi	11.3				11.5
μ	0.27				0.26
Physical Properties:
ω, lb/in.³	0.28
C, Btu/(lb)(°F)
K, Btu/[(hr)(ft²)(°F)/ft]	See Figure 2.6.4.0
α, 10^-6 in./in./°F.	See Figure 2.6.4.0

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