Trimet Prag s.r.o.

EN AB-44200 << back

Chemical designation: EN AB-AlSi12(a)
Previous Swedish standard: Type 4261

Chemical composition:

	Min %	Max %
Si	10,5	13,5
Fe	-	0,40
Cu	-	0,03
Mn	-	0,35
Mg	-	-
Cr	-	-
Ni	-	-
Zn	-	0,10
Pb	-	-
Sn	-	-
Ti	-	0,15

General description of properties:
Eutectic alloy with excellent castability properties, excellent fluidity and high resistance to hot tearing. Good machinability, excellent weldability and high resistance to chemical attack.

Suitable applications:
For complicated thin-wall, pressure-tight, castings subjected to fatigue loading. Good elongation and very good corrosion resistance

Heat treatment:
Can not be artificially aged. Annealed at 520-530ºC for 3-5 hours, followed by quenching in water.

Others each max 0,05%
and total max 0,15%

Casting characteristics, S-Sand cast, K-Chill cast:

Solidification range, ºC, about	Casting temperature ºC, about	Fluidity	Resistance to hot tearing	Shrinkage %, about	Pressure tightness
580-570	680-750	Excellent	Excellent	S: 1-1,1 K: 0,8-1	Excellent

Mechanical properties of separately untreated cast test bars:

Tensile strength, Rm, MPa, min.	Proof stress Rp0,2, MPa, min.	Elongation A50, %, min.	Brinell hardness HBS, min.
S: 150 K: 170	S: 70 K: 80	S: 5 K: 6	S: 50 K: 55

Mechanical and physical properties:

Density Kg/Dm³	Strength	Machinability	Weldability	Resistance to corrosion
2,65	Poor	Satisfact.	Excellent	Good

Decorative anodizing	Ability to be polished	Linear thermal expansion 293-373ºK, ºK¯¹	Electrical conductivity MS/m	Thermal conductivity W/mºK
Not recom.	Poor	20 x 10¯6	17 – 24	140 - 170