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Custom 455-H950 Tubing (Welded): MIL-HDBK-5J Design Allowables

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Material class	Steel
Alloy / temper / form	Custom 455 / H950 / Tubing (Welded)
Specifications	AMS 5578
Handbook	MIL-HDBK-5J, 31 January 2003, section 2.6.4.0, Table 2.6.4.0(b) (pdf page 141 of the chapter file)
Dimension bands	2
Density	0.28 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		0.020–0.062 in	0.062– in
Specification		AMS 5578	AMS 5578
Basis		S	S
F_tu, ksi	L	220	220
	LT	225	225
	ST	225	225
F_ty, ksi	L	205	205
	LT	210	210
	ST	210	210
F_cy, ksi	L	219	219
	LT	219	219
	ST	219	219
F_su, ksi	L	133	133
	LT	133	133
	ST	133	133
F_bru (e/D = 1.5), ksi	L	355	355
	LT	355	355
	ST	355	355
F_bru (e/D = 2.0), ksi	L	450	450
	LT	450	450
	ST	450	450
F_bry (e/D = 1.5), ksi	L	311	311
	LT	311	311
	ST	311	311
F_bry (e/D = 2.0), ksi	L	366	366
	LT	366	366
	ST	366	366
e, %	L	3	4
	LT	5	5
	ST	5	5
E, Msi		28.5	28.5
E_c, Msi		30	30
G, Msi		11.3	11.3
ν		0.27	0.27
ρ, lb/in3		0.28	0.28

Effect of Temperature

Percent of the room-temperature value against temperature, digitized from the handbook figures (the shortest exposure of each figure, every 10 °F). Strength curves give the allowable at temperature; "after exposure" curves give the room-temperature property after a soak at that temperature.

Strength allowables at temperature, percent of room temperature

Elongation and exposure effects

°F	F_tu	F_ty	F_su
-100	109.5	106.3
0	103.4	103.4	102.2
100	99	99	97.7
200	94.3	94.3	92.5
300	89.8	89.8	87.3
400	86.7	84.5	83.4
500	83.3	80	79.8
600	80.2	75.9	76.2
700	76.5	72.1	72.2

Factors in percent of the room-temperature allowable.

Other Custom 455 Tables

Custom 455-H1000 Bar (Table 2.6.4.0(b))
Custom 455-H950 Bar (Table 2.6.4.0(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from the chapter tables; check the printed table before use in a certified analysis, and note that MIL-HDBK-5J was superseded by MMPDS, whose later editions may differ.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.