Technical Data

Technical Information on Aluminium Alloys

Alloys Equivalents. Europe, USA,

UK	ISO	Germany	France	USA
LM0
LM6	AlSi12	G-AlSi12 DIN231	AS13	A413
LM25	AlSi7Mg	G-AlSi8Mg		A356.1
LM27	AlSi5Cu3
LM13
LM16

Elements	LM4	LM6	LM25	LM27	LM0	LM16
Copper Cu	2.0 – 4.0	0.1 max	0.20 max	1.5 to 2.5	0.0.03	1.0 – 1.5
Magnesium Mg	0.2 max	0.10 max	0.20 to 0.6	0.35 max	0.03	0.4 – 0.6
Silicon Si	4.0 – 6.0	10.0 to 13.0	6.5 to 7.5	6.0 to 8.0	0.30	4.5-5.5
Iron Fe	0.8 max	0.6 max	0.5 max	0.8 max	0.40	0.6
Manganese Mn	0.2 – 0.6	0.5 max	0.3 max	0.2 to 0.6	0.03	0.5
Nickel Ni	0.3 max	0.1 max	0.1 max	0.3 max	0.03	0.25
Zinc Zn	0.5 max	0.1 max	0.1 max	1.0 max	0.07	0.1
Lead Pb	0.1 max	0.1 max	0.1 max	0.2 max	0.03	0.1
Tin Sn	0.1 max	0.05 max	0.05 max	0.1 max	0.03	0.05
Titanium Ti	0.2 max	0.2 max	0.2 max	0.2 max	-	0.2
Aluminium Al	Remainder	Remainder	Remainder	Remainder	Remainder	Remainder

Mechanical Properties of Aluminium Castings (obtained on separately cast test samples)

Aluminium Alloy LM4

Mechanical Properties	Sand Cast	Sand Cast	Gravity Die Cast	Gravity Die Cast
Aluminium Alloy (Heat Treatment)	LM4M	LM4 TF	LM4 M	LM4 TF
Tensile Strength (N/mm2)	140 - 170	230 – 290	160 - 220	280 - 370
Elongation (%)	2 – 3	0 - 2	2 – 4	1 - 5
Brinell Hardness Number	65 - 80	90 – 120	70 - 90	90 – 120

Application and uses:

LM4 is suitable for general engineering castings: gearboxes, junction boxes, cluch cases, switch gear covers, tool handles, crankcases and where the conditions of use require moderate mechanical properties.

Aluminium Alloys LM6

Mechanical Properties	Sand Cast	Gravity Die Cast
Aluminium Alloy (Heat Treatment)	LM6M	LM6 M
Tensile Strength (N/mm2)	160 - 190	160 - 220
Elongation (%)	5 - 10	7 - 15
Brinell Hardness Number	50 - 55	55 - 60

Application and Uses:

LM6 is used in many ‘marine castings’ water cooled manifolds and water jackets, motor vehicle and road transport fittings, intricate and thin section ccastings and for very large Aluminium castings, where the ease of casting is important. LM6 is very ductile and suitable for castings requiring flexibility without breaking.

Aluminium Alloy LM25 Sand Cast

Mechanical Properties	Sand Cast	Sand Cast	Sand Cast	Sand Cast
Aluminium Alloy (Heat Treatment)	LM25 M	LM25 TE	LM25 TB7	LM25 TF
Tensile Strength (N/mm2)	130 -150	150 - 180	160	230 - 280
Elongation (%)	2 – 3	1 - 2	2.5	0 - 2
Brinell Hardness Number	55 - 65	70 – 75	65 - 75	90 – 110

Aluminium Alloy LM25 Gravity Die Cast

Mechanical Properties	Gravity Die Cast	Gravity Die Cast	Gravity Die Cast	Gravity Die Cast
Aluminium Alloy (Heat Treatment)	LM25 M	LM25 TE	LM25 TB7	LM25 TF
Tensile Strength (N/mm2)	160 - 200	190 – 250	230	280 - 320
Elongation (%)	3 – 6	2 - 3	5 – 10	2 - 5
Brinell Hardness Number	55 - 65	75 – 95	65 - 75	90 – 110

Applications and uses:

LM25 can be used in the ‘as cast condition’ or can be heat treated to achieve improved mechanical properties for certain uses. Applications in the food industry and road transport industry where its use on cylinder blocks and heads and other engine parts has been well proven. Castings requiring strength at elevated temperatures are often made in LM25.

Aluminium Alloys LM27

Mechanical Properties	Sand Cast	Sand Cast	Gravity Die Cast	Gravity Die Cast
Aluminium Alloy (Heat Treatment)	LM27 M	LM27 TF	LM27 M	LM27 TF
Tensile Strength (N/mm2)	140 -170	250 - 280	160 – 200	250 - 290
Elongation (%)	1 – 4	0.5 – 2	2 - 4	1 – 3
Brinell Hardness Number	70 - 85	110 – 130	75 - 90	110 – 130

Applications and uses:

LM27 is a very versatile alloy used for general purpose castings requiring moderate strength and mechanical properties. General engineering, electrical tools, engine and transmission components, household fittings.

Aluminium Alloy LM0

Mechanical Properties	Sand Cast	Gravity Die Cast
Aluminium Alloy	LM0	LM0
Tensile Strength (N/mm2)	80	80
Elongation (%)	30	40
Brinell Hardness Number	25	25

Applications and uses:

LM0 is pure aluminium and is used predominantly for electrical conduction equipment (cable clamps), cast rotors for electric motors, chemical plant applications and food industry.

Aluminium Alloys LM16

Mechanical Properties	Sand Cast	Gravity Die Cast
Aluminium Alloy (Heat Treatment)	LM16 TB	LM16 TB
Tensile Strength (N/mm2)	170 - 200	230 - 250
Elongation (%)	2 - 3	7 - 6
Brinell Hardness Number	80	85

Applications and uses:

Used where heat treatment of the alloys producing high strength and leak proof castings such as water jackets, cylinder heads, fire hose couplings and valve bodies is needed.