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Aluminium Alloys

Comparison Table of Casting Characteristics of Major Aluminium Casting Alloys

 

LM5

LM6

LM9

LM16

LM24

LM25

LM27

LM31

Tensile Strength (N/mm2)

140-170

160-190

95-120

170

180

130-150

140

215

Elongation (%)

3

5

3-5

2

1.5

2

1

4

Brinell Hardness

50-70

50-55

75-85

85

85

55-65

70-85

70

Density (g/cm3)

2.65

2.65

2.68

2.7

2.79

2.68

2.75

2.81

Freezing range (degC approx.)

642-580

575-565

575-550

620-550

580-520

615-550

605-525

615-570

Thermal Con (cal/cm2/cm/deg C @ 25degC)

0.33

0.34

0.35

0.34

0.23

0.36

0.37

0.35

Electrical Con (% copper std. @ 20degC)

31

37

38

39

24

39

27

35

Machinability

E

P

F

G

G

G

G

G

Corrosion Resistance

E

E

G

G

F

E

G

E

Electro Plating Suitability

F (2)

F (1)

F (1)

F (1)

F

F

G

F

Non Spark

No

No

No

No

No

No

No

No

Casting Characteristics - Sand Casting 

F

E

G

G

F*

E

G

G

Casting Characteristics - Gravity Die Casting

F

E

G

G

F

E

E

F

Casting Characteristics - High Pressure Die Casting

F

G

*

*

E

G

G

F

Material Cost (£/kg - Dec 2011)

£2.20

£1.95

£1.94

£1.94

£1.76

£1.92

£1.79

 £2.20

E = Excellent
G = Good
F = Fair
P = Poor
U = Unsuitable
* = Not normally used in this form
1 = These alloys, containing Silicon, require a modification treatment for good adhesion
2 = Can be plated, but not recommended

Trying to figure out how aluminium specifications from different regions translate to the alloys used domestically can be confusing.

Our Global Standards Chart will help you to compare and contrast the different specifications of aluminium alloys between the UK and other countries such as Japan, France, Italy, Germany, and the United States.

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