RAFFMETAL
THE ALUMINIUM EVOLUTION
Leghe di alluminio in colata continua. C
Continuous casting aluminium alloys
Standard: UNI EN 1676 and 1706
Alloy group: Al Si 5 Cu
Alloy designation: EN AB and AC 45500 - Al Si 7 Cu 0.5 Mg
Replaces:
CHEMICAL COMPOSITION %
ELEMENTS
ALLOY Individual Global
Si Fe Cu Mn Mg Cr Ni Zn Pb Sn Ti impurities impurities
min 65
6,5 02
0,2 0 25
0,25
EN AB 46000
max 7,5 0,25 0,7 0,15 0,45 0,07 0,20 0,03 0,10
min
DIN 226 D
max
MECHANICAL FEATURES DETECTED FROM SEPARATE CASTING TEST SPECIMENS
Rm Sp 0,2 A HB
Temper Tensile strenght Yield strenght Elongation Brinell hardness
Casting
Cast gpprocess
ocess designat
des g at
ions EN 1706 DIN 1725 EN 1706 DIN 1725 EN 1706 DIN 1725 EN 1706 DIN 1725
Mpa N/mm2 Mpa N/mm2 % % HBW HB
SAND (as cast) T6 250 190 1 85
Annealed
SHELL (as cast) T6 320 240 4 100
Annealed
PRESSURE DIE (as cast)
PHYSICAL PROPERTIES (indicative values subject to the UNI EN and ex DIN Standards)
DENSITY 2.66 Kg/dm³ THERMAL CONDUCTIVITY at 20°C 150 - 165 W/(m K)
550 °C LINEAR THERMAL EXPANSION from 20 t 100Ԩ
MELTING RANGE or MELTING POINT
625 °C LINEAR THERMAL EXPANSION from 20 t 200Ԩ 22.0-10-6/°C
SPECIFIC HEAT (at 100)° 0.92 J/Gk LINEAR THERMAL EXPANSION from 20 t 300Ԩ
LINEAR SHRINKAGE IN SAND 1.1 - 1.2 % SUGGESTED MAXIMUM TEMPERATURE 780°C
PROCESS
LINEAR SHRINKAGE IN SHELL PROCES 08-1
0.8 1.1
1% SUGGESTED CASTING TEMPERATURE
LINEAR SHRINKAGE IN HIGH PRESSUR °in sand 680 - 750 °C
ELECTRIC CONDUCTIVITY 16 - 22 MS/m °in shell 680 - 750 °C
MODULUS OF ELASTICITY 7400 Kg/mm² °in pressure die
TECHNOLOGICAL FEATURES, QUALITATIVE INDICATIONS
STRENGTH AT ELEVATED TEMPERATURE(to 200°C) GOOD RESISTANCE TO HOT TEARING GOOD
GENERAL RESISTANCE TO CORROSION GOOD PRESSURE TIGHTNESS GOOD
MACHINABILITY GOOD WELDABILITY GOOD
CASTABILITY GOOD DECORATIVE ANODISING NOT RECOMMEND
POLISHING MEDIUM PROTECTIVE ANODISING NOT RECOMMEND
Raffmetal S.p.a.
via malpaga, 82 25070 Casto (BS)
tel:0365.890.100 fax 0365.899.327
qualita@raffmetal.it
vendite@raffmetal.it
RAFFMETAL
THE ALUMINIUM EVOLUTION
Leghe di alluminio in colata continua
continua. Continuous casting aluminium alloys
Standard: UNI EN 1676 and 1706
Alloy group: Al Si 5 Cu
Alloy designation: EN AB and AC 45500 - Al Si 7 Cu 0.5 Mg
Replaces:
GENERALITIES REGARDING USE
The ingot recasting process must be carried out as quickly as possible and overheating must be avoided (maximum melting temperature 780 ).
The iron tools that can come into contact with the liquid metal must be appropriately painted to prevent contamination of the alloy.
The best results for refining the alloy are reached by treatments with inert gases such as nitrogen and/or argon with the intent of removing the
hydrogen dissolved and the oxides present in the bath of molten metal. Better distribution of the gas in the molten metal is obtained by the use of
relevant rotors. Pay particular attention that all transfer operations of the molten metal are performed with less turbulence possible. It is
recommended
to leave the molten metal at rest for a few minutes before starting casting. Careful skimming operations of the bath are recommended.
The re-cycling of risers and casting appendixes is allowed but within the limits of 40% of the total weight of the load.
SPECIFICITY REGARDING USE
For the realisation of casting with sensitive thickness, it is recommended to envision "modification" treatment.
If Strontium is used as the modifying element, it is recommended to operate with Strontium that do not exceed 300 ppm in order to prevent excess
reactivity of the alloy in the liquid state with consequent oxidation and gassing phenomena
Remember that the contents of Strontium exceeding 100 ppm are normally sufficient to obtain a well-modified structure.
Considering the relative level of purity of the alloy's chemical composition (reduced content of Zn - Fe) it is important to evaluate the level of
ofl thelimelting furnaces and the attention of the re-cycling of the risers in order to prevent induced pollution that could jeopardise the technical
ti
of the alloy.
TYPICAL USE
Alloy EN 45500 is in compliance with the EN 601 Foodstuff Standard.
COMPARISON WITH EQUIVALENT OR SIMILAR FOREIGN STANDARDS
ITALY GERMANY FRANCE G.B.R. USA ISO JAPAN TURKEY
UNI (Din1725/5-86) (NFA57-105) (BS1490-88) (ASTM B179-82) (3522-84) (JIS H2211-92) (ETIAL)
Equivalent
Similar
HEAT TREATMENTS
Limitation of liability
The contents of these technical sheets gave an informative purpose and do not constitute a warranty regarding the properties stated. The decisions based on this information are taken under
the responsibility and risk of the user and do not exclude it from the verification. If the former are not carried out, we do not assume any liability.
Raffmetal S.p.a.
via malpaga, 82 25070 Casto (BS)
tel:0365.890.100 fax 0365.899.327
qualita@raffmetal.it
vendite@raffmetal.it
