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Castadur-30

Castadur-30 / AlZn3Mg3Cr (RHEINFELDEN ALLOYS) | Gravity die casting

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

TemperWallYield MPaTensile MPaElong. %
T1Not specified140–160260–29010–20

T1 condition: Original-supplier T1 self-aged performance range. Wall thickness, test specimen size, test temperature and precise ageing duration are not stated for this row. The application photo dimensions are not specimen dimensions.

Chemical composition

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

Original-supplier branded Castadur-30 / AlZn3Mg3Cr, not generic AlZn3Mg3Cr. The 2015 overview, 2016 handbook, technical sheet and current product page are one issuer. The detailed 2016 p. 48 Fe and Cr values differ from the 2015 overview/2016 summary; neither element is published. A process-sheet maximum Si content of 0.14% is not substituted for the p. 48 ingot limit of 0.15%. The T1 mechanical row has no reported wall thickness or ageing duration. The p. 104 ageing diagram remains undigitized.

Element / source labelMinimum wt%Upper wt%
Si—0.15
Cu—0.05
Mn0.10.2
Mg2.53.0
Zn2.22.8
Ti0.030.15
Be—0.004

Physical and thermal properties

PropertyReported valueUnitCondition
density2.74kg/dm³Supplier physical summary; heat-treatable alloy in heat-treated state; test temperature not separately reported
youngs modulus70–72GPaSupplier physical summary; heat-treatable alloy in heat-treated state; test temperature not separately reported
thermal expansion2410⁻⁶/KSupplier physical summary; heat-treatable alloy in heat-treated state; 20–200 °C
thermal conductivity1.2W/(K·cm)Supplier physical summary; heat-treatable alloy in heat-treated state; 20–200 °C
electrical conductivity17–20MS/mSupplier physical summary; heat-treatable alloy in heat-treated state; MS/m; temperature not separately reported
electrical conductivity29.5–34.5%IACSSupplier physical summary; heat-treatable alloy in heat-treated state; %IACS; temperature not separately reported
linear shrinkage1.0–1.4%Supplier physical summary; heat-treatable alloy in heat-treated state; sand casting; temperature not separately reported
linear shrinkage0.7–1.1%Supplier physical summary; heat-treatable alloy in heat-treated state; gravity die casting; temperature not separately reported
melt solidification range555–650°CSupplier melt and solidification range; includes partial-melting onset from segregation in cast structure
density2.74g/cm³Manufacturer REACH technical information, 2015 version 2; stated at 20 °C; product form not further specified
melting range555–650°CManufacturer REACH technical information, 2015 version 2; modification state and measurement method not stated

Processing properties

Source-reported comparisons, not certified limits.

PropertyReported value
post melting temperature limitAfter melting down: maximum 820 °C; supplier instructs temperature check.
refining start temperatureWhen impeller or gas-flushing lance treatment is used, the supplier recommends a starting temperature strictly above 780 °C to account for cooling.
rotor refiningQuick-running gas rotor: argon or nitrogen 7–10 L/min for 3–6 min.
refining qualityWith effective refining the supplier says density index DI <1 can be achieved and maintained; this is guidance, not a test result for each casting.
sand pouring temperatureApproximate sand-casting pour 720–760 °C, with 730 °C recommended; depends on design, size and wall thickness.
gravity pouring temperatureApproximate gravity die-casting pour 730–760 °C, with 750 °C recommended; depends on design, size and wall thickness.
model design shrinkageSupplier model-design shrinkage allowance: 1.0–1.3%; this is not substituted for measured linear shrinkage in the physical table.
gravity die temperatureGravity die temperature 250–400 °C depending on casting; supplier recommends 350 °C to reduce cracking.
grain refiner after holdingAfter long holding with high return use, a small grain-refiner addition such as AlTi5B1 wire 0.5 kg/t is recommended just before pouring; not a composition limit.
cast removalCastings are still soft when removed from sand mould or gravity die; dimensionally critical castings require careful removal.
self ageing contextThe general technical chapter names Castadur-30 among self-ageing high-zinc alloys and says strength increase is normally complete eight days after mould removal; this is not assigned as the precise duration of the T1 mechanical specimen row.
ageing figure provenanceThe handbook p. 104 Figure 9 plots Castadur-30 French gravity-die test-piece properties versus days after casting; curves have not been digitized into numerical claims.

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
brinell hardness75–85 HBWGravity die casting; T1 self-aged; supplier performance range; wall thickness not reported
ignition temperature400 °CManufacturer REACH technical information; dust form only; not a bulk-alloy ignition temperature

Data under review

Composition Fe withheld: Original supplier detailed 2016 p. 48 Fe limit 0.15 differs from its 2015 overview p. 4 0.2 and 2016 p. 77 summary. The reason and applicable edition are unstated; neither is published.

Primary Aluminium Casting Alloys handbook, 2016 — Castadur-30 ↗ — PDF p. 48, Castadur-30 detailed chemistry, Fe column

Aluminium Casting Alloys overview, 2015 — Castadur-30 ↗ — PDF p. 4, Castadur-30 2015 chemistry row, Fe column

Composition Cr withheld: Original supplier detailed 2016 p. 48 Cr limit 0.25 – 0.35 differs from its 2015 overview p. 4 0.2 – 0.4 and 2016 p. 77 summary. The reason and applicable edition are unstated; neither is published.

Primary Aluminium Casting Alloys handbook, 2016 — Castadur-30 ↗ — PDF p. 48, Castadur-30 detailed chemistry, Cr column

Aluminium Casting Alloys overview, 2015 — Castadur-30 ↗ — PDF p. 4, Castadur-30 2015 chemistry row, Cr column

Evidence

Castadur-30 technical information (REACH), 2015 version 2 — RHEINFELDEN ALLOYS GmbH & Co. KG

Aluminium Casting Alloys overview, 2015 — Castadur-30 — RHEINFELDEN ALLOYS GmbH & Co. KG

Primary Aluminium Casting Alloys handbook, 2016 — Castadur-30 — RHEINFELDEN ALLOYS GmbH & Co. KG

Show the exact source location for each value

Official issuer page