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Silafont-09

Silafont-09 / AlSi9 (RHEINFELDEN ALLOYS) | High-pressure die casting

Manufacturer-reported values. Do not use as certified design allowables. View sources ↗

No complete reviewed mechanical condition. Separately reviewed property observations appear below.

Chemical composition

Only reviewed weight-percent bounds are listed. A blank bound means only the other threshold was reported.

Element / source labelMinimum wt%Upper wt%
Si9.510.6
Fe—0.4
Cu—0.02
Mn—0.4
Mg—0.05
Zn—0.1
Ti—0.1

The 2016 manufacturer handbook reports composition as percent of mass. Single printed elements are maxima (handbook p. 76), not nominal values. The F-state UTS is withheld because handbook p. 33 and p. 78 disagree; the matching yield, elongation and hardness observations remain separate rather than being combined into a complete tensile condition.

Physical and thermal properties

PropertyReported valueUnitCondition
density2.65kg/dm³manufacturer approximate value; temperature and temper not separately reported
young modulus62–78GPamanufacturer physical-property range; temperature and temper not separately reported
thermal expansion2110⁻⁶/Kmanufacturer linear CTE over 20–200 °C; temper not separately reported
thermal conductivity1.4W/(K·cm)manufacturer thermal table over 20–200 °C; temper not separately reported
electrical conductivity18–24MS/mmanufacturer physical table; test temperature and temper not separately reported
electrical conductivity31.0–41.5%IACSmanufacturer physical table; same row as 18–24 MS/m; test temperature and temper not separately reported
linear shrinkage0.4–0.6%high-pressure die casting; manufacturer physical table; test conditions not separately reported
solidification range550–595°Cmanufacturer melt and solidification range; includes possible partial melting from cast segregation, not an equilibrium melting point

Processing properties

Source-reported comparisons, not certified limits.

PropertyReported value
castabilityvery good casting properties, even with thick-walled designs.
corrosion resistanceVery good corrosion resistance to weathering and water.

Additional property data

Source-reported values, specification intervals, minimums and strict bounds; an average is labeled only when the source reports it. Compare conditions before use.

PropertyValueCondition
yield strength120–180 MPaSilafont-09; HPDC F; wall thickness and test temperature not reported; matching manufacturer tables on PDF pp. 33 and 78
elongation4–8 %Silafont-09; HPDC F; wall thickness and test temperature not reported; matching manufacturer tables on PDF pp. 33 and 78
brinell hardness55–80 HBWSilafont-09; HPDC F; wall thickness and test temperature not reported; matching manufacturer tables on PDF pp. 33 and 78

Mechanical conditions under review

silafont-09-hpdc-f-uts withheld: The original developer’s 2016 handbook prints F-state HPDC UTS 240–280 MPa on PDF p. 33 but 220–280 MPa on PDF p. 78. The current official product page follows p. 33. No value is selected until the issuer resolves the internal discrepancy.

Primary Aluminium Casting Alloys handbook, 2016 — Silafont-09 ↗ — PDF p. 33, Silafont-09 HPDC F mechanical row

Primary Aluminium Casting Alloys handbook, 2016 — Silafont-09 ↗ — PDF p. 78, Silafont-09 D F mechanical summary row

Evidence

Primary Aluminium Casting Alloys handbook, 2016 — Silafont-09 — RHEINFELDEN ALLOYS GmbH & Co. KG

Show the exact source location for each value

Official issuer page