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England B.S. L91 Specification for ingots and castings of aluminium-copper alloy (165 MN/m2 0.2 per cent proof stress) (Cu 4.5) and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: L91 / L 91
Category Grade Standard Region/Area Standard Content
Metals L 91 BS 2L 91 England Specification for ingots and castings of aluminium-copper alloy (165 MN/m2 0.2 per cent proof stress) (Cu 4.5)

Chemical composition(mass fraction)(wt.%) of the L 91

Element Min Max Similar
Zn - 0.1000 -
Ti - 0.2500 -
Sn - 0.0500 -
Si - 0.2500 -
Pb - 0.0500 -
Ni - 0.1000 -
Mn - 0.1000 -
Mg - 0.1000 -
Fe - 0.2500 -
Cu 4.0000 5.0000 -
Al - - -

Mechanical Properties of steel grade L 91

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
643 (≥) 677 (≥) 34 21 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 423

Physical Properties of steel grade L 91

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
41 - -     0.11 -  
251 656 - 43.3 411   -  
426 - 33 43.2   413 121

Heat Treatment of steel grade L 91

Heat treated : 1716°C - 1194°C

Technological Curves of steel grade L 91

Cross Reference Table (Equivalent Grade) of L 91

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