Castasil-21
Castasil-21 / AlSi9Sr (2015) / AlSi9SrE (2018) (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 label | Minimum wt% | Upper wt% |
|---|---|---|
| Si | 8.0 | 9.0 |
| Fe | 0.5 | 0.7 |
| Cu | — | 0.02 |
| Mn | — | 0.01 |
| Mg | — | 0.03 |
| Zn | — | 0.07 |
| Ti | — | 0.01 |
| Sr | 0.01 | 0.03 |
The supplier calls this branded grade AlSi9Sr in the 2015 handbook and AlSi9SrE in the 2018 handbook; these labels are not asserted to be generic equivalents. Their eight named ingot-element limits agree, but F/O mechanical ranges and physical density/expansion/thermal conductivity do not. Complete mechanical conditions and disputed physical values are withheld. The original-developer documents and the REACH Article 32 sheet are one issuer, not three independent authorities. The latter contains broad ingredient disclosure, not ingot limits. Older temperature-qualified and newer temperature-unspecified observations remain distinct; no averages or specimen conditions are invented.
Physical and thermal properties
| Property | Reported value | Unit | Condition |
|---|---|---|---|
| youngs modulus | 62–78 | GPa | 2015 handbook edition; 20 °C |
| solidification range | 550–595 | °C | 2015 handbook edition; solidification, source prints cooling order 595–550 °C |
| melting range | 550–595 | °C | 2015 REACH Article 32 sheet; melting interval, heating direction not specified |
| electrical conductivity | 23–25 | MS/m | 2015 handbook edition; temper F; 20 °C |
| linear shrinkage | 0.4–0.6 | % | HPDC; 2015 processing comparison and 2018 supplier physical table; casting geometry not specified |
| electrical conductivity | 25–28 | MS/m | Temper O; 2015 handbook at 20 °C and 2018 handbook without a stated test temperature |
| electrical conductivity | 43.0–48.5 | %IACS | 2018 structural-casts edition; temper O in the key-figures caption; test temperature not reported |
Processing properties
Source-reported comparisons, not certified limits.
| Property | Reported value |
|---|---|
| heat treatment conductivity | 2018 supplier: either 350 °C for 2 h or 250 °C for 3 h gives around 28 MS/m; slowly air cool after stress relief. The source does not give a complete specimen protocol. |
| strontium modification guidance | 2018 supplier handling guidance: Sr 100–350 ppm for modification; this is process guidance, not an additional ingot composition limit. |
| processing temperature | 2018 supplier describes 680–750 °C processing temperature for the 8–9% Si composition; not a test temperature for the mechanical rows. |
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.
| Property | Value | Condition |
|---|---|---|
| ultimate tensile strength | 200–230 MPa | HPDC; temper F; both supplier editions agree on this cell; wall and specimen size not reported |
| elongation | 6–9 % | HPDC; temper F; both supplier editions agree on this cell; wall and specimen size not reported |
| brinell hardness | 55–70 HBW | 2018 structural-casts handbook edition; HPDC; temper F; wall/test protocol not reported |
| brinell hardness | 55–65 HBW | 2018 structural-casts handbook edition; HPDC; temper O; wall/test protocol not reported |
Data under review
Yield Strength withheld: The 2015 and 2018 supplier F YTS intervals differ; the current webpage matches the older row. Neither interval is selected as a complete condition.
Castasil-21 original-supplier 2015 document ↗ — PDF p. 24, Castasil-21 yield_strength edition comparison
Castasil-21 original-supplier 2018 document ↗ — PDF p. 17, Castasil-21 yield_strength edition comparison
Yield Strength withheld: The 2015 and 2018 supplier O YTS intervals differ; the current webpage matches the older row. Neither interval is selected as a complete condition.
Castasil-21 original-supplier 2015 document ↗ — PDF p. 24, Castasil-21 yield_strength edition comparison
Castasil-21 original-supplier 2018 document ↗ — PDF p. 17, Castasil-21 yield_strength edition comparison
Ultimate Tensile Strength withheld: The 2015 and 2018 supplier O UTS intervals differ; the current webpage matches the older row. Neither interval is selected as a complete condition.
Castasil-21 original-supplier 2015 document ↗ — PDF p. 24, Castasil-21 ultimate_tensile_strength edition comparison
Castasil-21 original-supplier 2018 document ↗ — PDF p. 17, Castasil-21 ultimate_tensile_strength edition comparison
Elongation withheld: The 2015 and 2018 supplier O Elongation intervals differ; the current webpage matches the older row. Neither interval is selected as a complete condition.
Castasil-21 original-supplier 2015 document ↗ — PDF p. 24, Castasil-21 elongation edition comparison
Castasil-21 original-supplier 2018 document ↗ — PDF p. 17, Castasil-21 elongation edition comparison
Density withheld: The supplier editions give different density numbers, with different or unstated temperature conditions. Do not average or select one for an unqualified grade-level property.
Castasil-21 original-supplier 2015 document ↗ — PDF p. 24, Castasil-21 density edition comparison
Castasil-21 original-supplier 2018 document ↗ — PDF p. 17, Castasil-21 density edition comparison
Thermal Expansion withheld: The supplier editions give different thermal_expansion numbers, with different or unstated temperature conditions. Do not average or select one for an unqualified grade-level property.
Castasil-21 original-supplier 2015 document ↗ — PDF p. 24, Castasil-21 thermal_expansion edition comparison
Castasil-21 original-supplier 2018 document ↗ — PDF p. 17, Castasil-21 thermal_expansion edition comparison
Thermal Conductivity withheld: The supplier editions give different thermal_conductivity numbers, with different or unstated temperature conditions. Do not average or select one for an unqualified grade-level property.
Castasil-21 original-supplier 2015 document ↗ — PDF p. 24, Castasil-21 thermal_conductivity edition comparison
Castasil-21 original-supplier 2018 document ↗ — PDF p. 17, Castasil-21 thermal_conductivity edition comparison
Evidence
Castasil-21 original-supplier 2015 document — RHEINFELDEN ALLOYS GmbH & Co. KG
Castasil-21 original-supplier 2018 document — RHEINFELDEN ALLOYS GmbH & Co. KG
Castasil-21 original-supplier reach document — RHEINFELDEN ALLOYS GmbH & Co. KG
Show the exact source location for each value
- Si — PDF p. 24, Castasil-21 Si ingot chemistry column ↗
- Si — PDF p. 17, Castasil-21 Si ingot chemistry column ↗
- Fe — PDF p. 24, Castasil-21 Fe ingot chemistry column ↗
- Fe — PDF p. 17, Castasil-21 Fe ingot chemistry column ↗
- Cu — PDF p. 24, Castasil-21 Cu ingot chemistry column ↗
- Cu — PDF p. 17, Castasil-21 Cu ingot chemistry column ↗
- Mn — PDF p. 24, Castasil-21 Mn ingot chemistry column ↗
- Mn — PDF p. 17, Castasil-21 Mn ingot chemistry column ↗
- Mg — PDF p. 24, Castasil-21 Mg ingot chemistry column ↗
- Mg — PDF p. 17, Castasil-21 Mg ingot chemistry column ↗
- Zn — PDF p. 24, Castasil-21 Zn ingot chemistry column ↗
- Zn — PDF p. 17, Castasil-21 Zn ingot chemistry column ↗
- Ti — PDF p. 24, Castasil-21 Ti ingot chemistry column ↗
- Ti — PDF p. 17, Castasil-21 Ti ingot chemistry column ↗
- Sr — PDF p. 24, Castasil-21 Sr ingot chemistry column ↗
- Sr — PDF p. 17, Castasil-21 Sr ingot chemistry column ↗
- youngs modulus — PDF p. 24, Castasil-21 youngs_modulus value ↗
- solidification range — PDF p. 24, Castasil-21 solidification_range value ↗
- melting range — PDF p. 3, Castasil-21 melting_range value ↗
- electrical conductivity — PDF p. 24, Castasil-21 electrical_conductivity value ↗
- linear shrinkage — PDF p. 24, Castasil-21 linear shrinkage Castasil-21 column ↗
- linear shrinkage — PDF p. 17, Castasil-21 physical-table shrinkage column ↗
- electrical conductivity — PDF p. 24, Castasil-21 temper O electrical conductivity ↗
- electrical conductivity — PDF p. 17, Castasil-21 temper O electrical conductivity ↗
- electrical conductivity — PDF p. 17, Castasil-21 temper O %IACS physical-table value ↗
- heat treatment conductivity — PDF p. 18, Castasil-21 heat_treatment_conductivity ↗
- strontium modification guidance — PDF p. 18, Castasil-21 strontium_modification_guidance ↗
- processing temperature — PDF p. 18, Castasil-21 processing_temperature ↗
- ultimate tensile strength — PDF p. 24, Castasil-21 F ultimate_tensile_strength partial cell ↗
- ultimate tensile strength — PDF p. 17, Castasil-21 F ultimate_tensile_strength partial cell ↗
- elongation — PDF p. 24, Castasil-21 F elongation partial cell ↗
- elongation — PDF p. 17, Castasil-21 F elongation partial cell ↗
- brinell hardness — PDF p. 17, Castasil-21 F hardness cell ↗
- brinell hardness — PDF p. 17, Castasil-21 O hardness cell ↗