Trimet Prag s.r.o.

EN AB-44400 << back

Chemical designation: EN AB-AlSi9
Previous Swedish standard: Type 4255

Chemical composition:

	Min %	Max %
Si	8,0	11,0
Fe	-	0,55
Cu	-	0,08
Mn	-	0,50
Mg	-	0,10
Cr	-	-
Ni	-	0,05
Zn	-	0,15
Pb	-	0,05
Sn	-	0,05
Ti	-	0,15

General description of properties:
Near-eutectic alloy with excellent castability, but likely to adhere to the tool. Good resistance to hot tearing and high resistance to chemical attack.

Suitable applications:
For castings that must have good toughness and resistance to corrosion.

Heat treatment:
Not age hardenable

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
600-550	650-700	Excellent	Excellent	0,5 - 0,8	Good

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.
220	120	2	55

Mechanical and physical properties:

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

Decorative anodizing	Ability to be polished	Linear thermal expansion 293-373ºK, ºK¯¹	Electrical conductivity MS/m	Thermal conductivity W/mºK
Not recom.	Poor	21 x 10¯6	16 – 22	130 - 150