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Beryllium-Hot pressed (ground and etched) Bar, rod, tubing, and machined shapes: MIL-HDBK-5J Design Allowables

show SI units (MPa, GPa, kg/m³) open the MIL-HDBK-5J tool compare against temperature find alternatives

Material class	Beryllium
Alloy / temper / form	Beryllium / Hot pressed (ground and etched) / Bar, rod, tubing, and machined shapes
Specifications	AMS 7906
Handbook	MIL-HDBK-5J, 31 January 2003, section 7.2.1.0, Table 7.2.1.0(b) (pdf page 4 of the chapter file)
Dimension bands	1
Density	0.067 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		all
Specification		AMS 7906
Basis		S
F_tu, ksi	L	47
F_tu, ksi	LT	47
F_ty, ksi	L	35
F_ty, ksi	LT	35
e, %	L	2
e, %	LT	2
E, Msi		42
E_c, Msi		42
G, Msi		20
ν		0.1
ρ, lb/in3		0.067

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

Moduli at temperature

°F	F_tu	F_ty
100	98.8	98.8
200	93.7	93.5
300	88.7	88.9
400	83.6	84.8
500	78	80
600	71.9	74.9
700	65.2	69.3
800	58.2	62.3
1000	42.4	44.2
1200	23	22.8

Factors in percent of the room-temperature allowable.

Other Beryllium Tables

Beryllium-Stress relieved (ground and etched) Plate (Table 7.2.1.0(c))
Beryllium-Stress relieved (ground and etched) Sheet (Table 7.2.1.0(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from the chapter tables; check the printed table before use in a certified analysis, and note that MIL-HDBK-5J was superseded by MMPDS, whose later editions may differ.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.