Aluminum C443.0
UNS A34430
C443.0 is a secondary (recycled-stock) Al-Si die casting alloy of the ANSI/AA 4xx.x family, nominally around 5% Si, that relies on silicon content rather than heat treatment for its properties.
Reference datasheet — C443.0 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the F condition
C443.0 tempers and conditions
C443.0 is supplied in one standard condition, F. F is the default FabDigit quotes; the values on this page are for it.
What is C443.0?
C443.0 is a secondary (recycled-stock) Al-Si die casting alloy of the ANSI/AA 4xx.x family, nominally around 5% Si, that relies on silicon content rather than heat treatment for its properties. Engineers specify it for thin-wall die-cast housings and fittings that need high fluidity plus better ductility and corrosion resistance than copper-bearing die casting alloys: 110 MPa yield, 228 MPa tensile, 9% elongation, 65 HB, 142 W/m·K and 37% IACS in F condition. It is not heat treatable, is limited to about 150 °C service, and die castings cannot be reliably fusion welded. Where higher as-cast strength is needed, A380.0 is the usual alternative. C443.0 has a density of 2.69 g/cm³ (0.0972 lb/in³), lighter than 67% of aluminum grades. It melts at 577°C (1,071 °F). C443.0 has a yield strength of 110 MPa (16 ksi) and a tensile strength of 228 MPa (33.1 ksi) — weaker than 81% of aluminum grades. Elongation at break is 9% and the elastic modulus is 71 GPa (10.3 Msi).
What is C443.0 used for?
- Die-cast housings and enclosures
- Hardware fittings
- Thin-wall covers and bezels
- Electrical and instrument cases
- Brackets and mounting plates
- Decorative cast trim
- Heat-dissipating cast frames
Limitations
- Low fracture toughness — 17 MPa·√m (15.5 ksi·√in), worse than 83% of aluminum grades
- Low strength — 110 MPa (16 ksi), worse than 81% of aluminum grades
C443.0 properties
Typical room-temperature values for C443.0-F; bars are the position among aluminum grades.
Physical3
C443.0 has a density of 2.69 g/cm³ (0.0972 lb/in³), lighter than 67% of aluminum grades. It melts at 577°C (1,071 °F).
Mechanical11
C443.0 has a yield strength of 110 MPa (16 ksi) and a tensile strength of 228 MPa (33.1 ksi) — weaker than 81% of aluminum grades. Elongation at break is 9% and the elastic modulus is 71 GPa (10.3 Msi).
Thermal6
C443.0 is rated for continuous service to 150°C (302 °F). It conducts heat at 142 W/m·K (82 BTU/hr·ft·°F), better than 51% of aluminum grades. Thermal expansion is 22 µm/m·K (12.2 µin/in·°F).
Electrical3
C443.0 conducts electricity at 37 % IACS, better than 58% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), better than 67% of aluminum grades.
Sustainability4
Producing a kilogram of C443.0 takes about 200 MJ of energy and emits 12 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 85%.
Manufacturability8
C443.0's machinability is good (55/100, worse than 59% of aluminum grades); weldability fair (35/100); formability poor (15/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the aluminum family
Yield strength against density for every aluminum grade FabDigit runs. C443.0 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C443.0
Is C443.0 easy to machine?
Machines readily with sharp PCD or polished-flute carbide tools and high speeds; Si particles are abrasive so uncoated HSS wears quickly, and gummy chips need good coolant and chip breakers.
Can C443.0 be welded?
Fusion welding of die castings is unreliable because entrapped gas blisters and blows the weld; use mechanical joining, adhesives, or TIG only for cosmetic repair on low-gas (vacuum/squeeze) castings with 4043 filler.
Can C443.0 be formed, bent or molded?
Excellent die-casting fluidity and low hot-tearing lets it fill very thin (≈1 mm) walls; not heat-treatable, so section design rather than temper sets strength.
C443.0 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Si | 4.5 – 6 | 5.2 |
| Fehigh Fe tolerated to prevent die soldering | ≤ 2 | 1 |
| Cukept low for corrosion resistance | ≤ 0.6 | 0.2 |
| Mn | ≤ 0.35 | |
| Mg | ≤ 0.1 | |
| Ni | ≤ 0.5 | |
| Zn | ≤ 0.5 | |
| Sn | ≤ 0.15 | |
| Others (total)each 0.05 max where specified | ≤ 0.25 | |
| Al | balance |
What surface finishes work on C443.0?
Takes chromate/chemical conversion coats and powder paint well; anodizing gives a dark grey, non-decorative film, and polishing is limited by exposed silicon particles.
Surface treatments FabDigit runs on aluminum parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Equivalent designations
Standards and trade names that resolve to Aluminum C443.0 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- A34430
- Also called
- S5C
How much does C443.0 cost?
C443.0 is a standard-cost aluminum ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
C443.0 — frequently asked
What is C443.0 used for?
C443.0 is typically used for die-cast housings and enclosures, hardware fittings, thin-wall covers and bezels, electrical and instrument cases, brackets and mounting plates and decorative cast trim. In short: ductile Al-Si die alloy; fills 1 mm walls; corrosion-resistant cast aluminum.
What is the yield strength of C443.0?
C443.0 has a typical yield strength of 110 MPa (16 ksi) and a tensile strength of 228 MPa (33.1 ksi) — weaker than 81% of aluminum grades.
Is C443.0 easy to machine?
Reasonably — machinability is rated good (55/100, worse than 59% of aluminum grades). Machines readily with sharp PCD or polished-flute carbide tools and high speeds; Si particles are abrasive so uncoated HSS wears quickly, and gummy chips need good coolant and chip breakers.
Can C443.0 be welded?
With care — weldability is rated fair (35/100). Fusion welding of die castings is unreliable because entrapped gas blisters and blows the weld; use mechanical joining, adhesives, or TIG only for cosmetic repair on low-gas (vacuum/squeeze) castings with 4043 filler.
What surface finishes work on C443.0?
Takes chromate/chemical conversion coats and powder paint well; anodizing gives a dark grey, non-decorative film, and polishing is limited by exposed silicon particles.
Can C443.0 be formed, bent or molded?
Excellent die-casting fluidity and low hot-tearing lets it fill very thin (≈1 mm) walls; not heat-treatable, so section design rather than temper sets strength.
What is the maximum service temperature of C443.0?
C443.0 is rated for continuous use to about 150°C (302 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does C443.0 cost?
C443.0 is a standard-cost aluminum ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ANSI H35.1 / Registration Record of Aluminum Association Alloy Designations (Teal Sheets) — The Aluminum Association (2015)
- ASTM B85 — Standard Specification for Aluminum-Alloy Die Castings — ASTM International (2021)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- NADCA Product Specification Standards for Die Castings — North American Die Casting Association (2018)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.