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

show US units (ksi, Msi, lb/in³) open the MIL-HDBK-5J tool compare against temperature find alternatives

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	775 kg/m³

Design Mechanical and Physical Properties (room temperature)

Converted from the handbook table (ksi, Msi, lb/in³) and rounded to 4 significant figures; dimension bands in inches with mm in parentheses. 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 (0.508–1.575 mm)	0.062– in (1.575 mm)
Specification		AMS 5578	AMS 5578
Basis		S	S
F_tu, MPa	L	1517	1517
	LT	1551	1551
	ST	1551	1551
F_ty, MPa	L	1413	1413
	LT	1448	1448
	ST	1448	1448
F_cy, MPa	L	1510	1510
	LT	1510	1510
	ST	1510	1510
F_su, MPa	L	917	917
	LT	917	917
	ST	917	917
F_bru (e/D = 1.5), MPa	L	2448	2448
	LT	2448	2448
	ST	2448	2448
F_bru (e/D = 2.0), MPa	L	3103	3103
	LT	3103	3103
	ST	3103	3103
F_bry (e/D = 1.5), MPa	L	2144	2144
	LT	2144	2144
	ST	2144	2144
F_bry (e/D = 2.0), MPa	L	2523	2523
	LT	2523	2523
	ST	2523	2523
e, %	L	3	4
	LT	5	5
	ST	5	5
E, GPa		196.5	196.5
E_c, GPa		206.8	206.8
G, GPa		77.91	77.91
ν		0.27	0.27
ρ, kg/m³		7750	7750

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

°C	F_tu	F_ty	F_su
-73	109.5	106.3
-18	103.4	103.4	102.2
38	99	99	97.7
93	94.3	94.3	92.5
149	89.8	89.8	87.3
204	86.7	84.5	83.4
26	83.3	80	79.8
316	80.2	75.9	76.2
371	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.