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Custom 450-H1050 Bar: MIL-HDBK-5J Design Allowables

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Material class	Steel
Alloy / temper / form	Custom 450 / H1050 / Bar
Specifications	AMS 5773
Handbook	MIL-HDBK-5J, 31 January 2003, section 2.6.3.0, Table 2.6.3.0(c) (pdf page 130 of the chapter file)
Dimension bands	1
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		0–12 in (0–304.8 mm)
Specification		AMS 5773
Basis		S
F_tu, MPa	L	999.7
F_tu, MPa	LT	999.7
F_ty, MPa	L	930.8
F_ty, MPa	LT	930.8
F_cy, MPa	L	986
F_cy, MPa	LT	972.2
F_su, MPa	L	641.2
F_su, MPa	LT	641.2
F_bru (e/D = 1.5), MPa	L	1648
F_bru (e/D = 1.5), MPa	LT	1648
F_bru (e/D = 2.0), MPa	L	2117
F_bru (e/D = 2.0), MPa	LT	2117
F_bry (e/D = 1.5), MPa	L	1407
F_bry (e/D = 1.5), MPa	LT	1407
F_bry (e/D = 2.0), MPa	L	1772
F_bry (e/D = 2.0), MPa	LT	1772
e, %	L	12
e, %	LT	9
E, GPa		199.9
E_c, GPa		213.7
G, GPa		77.22
ν		0.29
ρ, kg/m³		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
-18	104.1	104.6	104.3
38	98.3	98.5	98.4
93	93	92.2	94.2
149	89.5	86.7	90.3
204	86.3	82.5	86.6
26	83.6	79.1	82.7
316	80.3	76.2	78.9
371	76.3	72.3	75
427	70.5	66.3

Factors in percent of the room-temperature allowable.

Other Custom 450 Tables

Custom 450-H1000 Bar (Table 2.6.3.0(c))
Custom 450-H1050 Bar (Table 2.6.3.0(b))
Custom 450-H1100 Bar (Table 2.6.3.0(c))
Custom 450-H1150 Bar (Table 2.6.3.0(c))
Custom 450-H900 Bar (Table 2.6.3.0(b))
Custom 450-H900 Bar (Table 2.6.3.0(c))
Custom 450-H950 Bar (Table 2.6.3.0(c))
Custom 450-Solution Treated Bar (Table 2.6.3.0(b))
Custom 450-Solution treated Bar (Table 2.6.3.0(c))

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.