ALCAST® cast blocks are principally used to build moulds for medium and low pressure processing of plastics, as well as for prototype moulds. The material properties are enhanced by its stringent casting process which insures a minimal porosity throughout the thickness of the plate.
Examples of applications :
Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti | Zr |
---|---|---|---|---|---|---|---|---|
max. 0.25 |
max. 0.40 |
max. 0.10 |
max. 0.10 |
1.2 1.8 |
max. 0.05 |
5.0 6.0 |
max. 0.10 |
0.04 0.18 |
this chemical composition matches EN AW-7021 according to EN 573-3, excepting the element Zr
Density | 2.78 g/cm3 |
---|---|
Elastic modulus | 72000 MPa |
Lin. thermal expansion coefficient (20°-100°C) | 23.7 10-6 K-1 |
Thermal conductivity | 150 W/mK |
Electrical conductivity (20°C) | 19 – 23 MS/m |
TIG DC | possible |
---|
Filler alloy: AA 5183
Please contact Constellium for recommendations
by resistance | excellent |
---|
Anodizing technical | good |
---|---|
Anodizing decorative | not suitable |
Alcast® blocks are available in temper T6 (solution heat treated – quenched – artificially aged) in thicknesses from 150 mm to 600 mm with following dimensions:
Thickness (over... to...) |
Dimensions |
---|---|
149 – 400 mm | 1520 x 3020 mm |
400 – 600 mm | 1450 x 2500 mm |
Plate dimensions 500 x 2020 x 4020 mm are available on request, with dimensional tolerances as indicated herewith.
(other dimensions on request)
Thickness (over... to...) |
Rm [MPa] |
Rp0.2 [MPa] |
A50 [%] |
---|---|---|---|
150 – 600 mm | 310 | 280 | 1.5 |
Thickness (over... to...) |
Rm [MPa] |
Rp0.2 [MPa] |
A50 [%] |
HB |
---|---|---|---|---|
150 - 400mm | 355 | 330 | 3.0 | 135 |
400 - 600mm | 350 | 320 | 2.5 | 130 |
Thickness (over... to...) | Tolerances Thickness | Width | Length |
---|---|---|---|
150 – 400 mm1) | + 5 / - 0 mm | + 2 / - 0 mm | + 4 / - 0 mm |
400 – 600mm | + 5 / - 0 mm | + 5 / - 0 mm | + 5 / - 0 mm |
1) 400 mm thick plates are obtained by scalping the ingot; thickness tolerance is +8/-0 mm. Other thicknesses are obtained by slicing.
Thickness (over... to...) | Longitudinal flatness (typical value) |
---|---|
150 – 600 mm | 2 mm / 1000 mm |
If ALCAST® can be used for prototype injection moulds, complex geometries (sharp radiusses, cores with high slender ratios) or moving elements have to be avoided. For such applications, wrought products are recommended.
Heating the alloy can result in loss of strength of properties or of capability for fabrication, assembly or application in a particular case. Whenever a new application of this alloy is contemplated, and if this application involves special properties such as corrosion resistance, toughness, fatigue strength, it is strongly recommended that the user should consult the producer in order to make a precise and appropriate selection of the material. The information in this publication does not imply a guarantee of properties or of capability for fabrication, assembly or application in a particular case. The appendix to technical datasheets is an integral part of this datasheet. The processing instructions presented in the appendix shall be taken into account by the user. This edition replaces all previous editions.
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