Aluminum EN AC-43500
EN AC-43500
EN AC-43500 (AlSi10MnMg, sold as Silafont-36 and Aural-2) is a manganese-bearing, low-iron AlSi10Mg die-casting alloy developed for structural, crash-relevant automotive castings, where Mn prevents die soldering without the brittle Fe needles.
Reference datasheet — EN AC-43500 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
EN AC-43500 tempers and conditions
EN AC-43500 is supplied in 5 conditions, soft to hard. F is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution heat treated and naturally aged | Pick when maximum elongation is required for self-pierce riveting, clinching or post-cast bending of the casting. | 115 | 265 | 18 | 68 HB | 22 % IACS |
FDefault As fabricated | Default production condition: good strength/ductility balance straight from the die, no distortion or blister risk. | 135 | 270 | 8 | 85 HB | 25 % IACS |
Solution heat treated and overaged (stabilized) | Standard automotive crash temper: 10–18 % elongation with stable dimensions, ideal for riveted/welded body-in-white castings. | 140 | 220 | 16 | 68 HB | 30 % IACS |
Cooled from hot working and artificially aged | Cheap strength boost via a single low-temperature age; keeps dimensional accuracy and avoids blistering because no solution soak is used. | 180 | 275 | 6 | 95 HB | 28 % IACS |
Solution heat treated and artificially aged | Highest strength condition for load-bearing brackets and nodes; requires vacuum/low-gas casting to avoid solution-treat blisters. | 235 | 320 | 9 | 105 HB | 27 % IACS |
What is EN AC-43500?
EN AC-43500 (AlSi10MnMg, sold as Silafont-36 and Aural-2) is a manganese-bearing, low-iron AlSi10Mg die-casting alloy developed for structural, crash-relevant automotive castings, where Mn prevents die soldering without the brittle Fe needles. As-cast it gives 270 MPa tensile, 135 MPa yield, 8 % elongation and 85 HB, with 140 W/m·K and 75 GPa modulus, and it is available in F, T4, T5, T6 and T7. It needs vacuum-assisted casting and a clean, Sr-modified melt to remain heat treatable; service tops out near 150 °C and electrical conductivity is only 25 % IACS. EN AC-43500 has a density of 2.65 g/cm³ (0.0957 lb/in³), lighter than 90% of aluminum grades. It melts at 557°C (1,035 °F). EN AC-43500 has a yield strength of 135 MPa (19.6 ksi) and a tensile strength of 270 MPa (39.2 ksi) — weaker than 72% of aluminum grades. Elongation at break is 8% and the elastic modulus is 75 GPa (10.9 Msi).
What is EN AC-43500 used for?
- structural die castings
- crash-relevant automotive parts
- shock towers
Advantages
- Low embodied carbon — 10.5 kg CO₂/kg, better than 95% of aluminum grades
Limitations
- Low electrical conductivity — 25 % IACS, worse than 92% of aluminum grades
- Hard to polish — 45/100, worse than 76% of aluminum grades
EN AC-43500 properties
Typical room-temperature values for EN AC-43500-F; bars are the position among aluminum grades.
Physical3
EN AC-43500 has a density of 2.65 g/cm³ (0.0957 lb/in³), lighter than 90% of aluminum grades. It melts at 557°C (1,035 °F).
Mechanical13
EN AC-43500 has a yield strength of 135 MPa (19.6 ksi) and a tensile strength of 270 MPa (39.2 ksi) — weaker than 72% of aluminum grades. Elongation at break is 8% and the elastic modulus is 75 GPa (10.9 Msi).
Thermal6
EN AC-43500 is rated for continuous service to 150°C (302 °F). It conducts heat at 140 W/m·K (80.9 BTU/hr·ft·°F), worse than 52% of aluminum grades. Thermal expansion is 21 µm/m·K (11.7 µin/in·°F).
Electrical3
EN AC-43500 conducts electricity at 25 % IACS, worse than 92% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), better than 67% of aluminum grades.
Sustainability4
Producing a kilogram of EN AC-43500 takes about 155 MJ of energy and emits 10.5 kg of CO₂ — less than 94% of aluminum grades. Typical recycled content is 25%.
Manufacturability8
EN AC-43500's machinability is good (62/100, better than 55% of aluminum grades); weldability very good (72/100); formability fair (35/100).
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. EN AC-43500 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with EN AC-43500
Is EN AC-43500 easy to machine?
Machines like other eutectic Al-Si die castings — use PCD or diamond-coated carbide, high speed with light feeds and copious coolant; interrupted cuts through porosity are the main tool-life issue.
Can EN AC-43500 be welded?
Good MIG/TIG/laser and CMT weldability with ER4043/ER5356-type filler thanks to near-zero Cu; success depends on low gas porosity, and remote-laser or friction-element joints are standard for casting-to-sheet assemblies.
Can EN AC-43500 be formed, bent or molded?
Designed for vacuum-assisted high-pressure die casting of 2–4 mm walls; keep melt clean and Sr-modified, hold Fe <0.15 %, and use jet cooling/short shot times to allow later solution treatment without blistering.
EN AC-43500 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 |
|---|---|---|
| SiSr-modified eutectic | 9 – 11.5 | 10.5 |
| Mnreplaces Fe as anti-soldering element | 0.4 – 0.8 | 0.6 |
| Mg0.1–0.3 % for high-ductility T7, up to 0.6 % for T6 | 0.1 – 0.6 | 0.25 |
| Fekept low for ductility | ≤ 0.15 | 0.1 |
| Culimited for corrosion resistance | ≤ 0.03 | 0.01 |
| Zn | ≤ 0.07 | 0.02 |
| Tigrain refiner | 0.04 – 0.15 | 0.08 |
| Srproducer addition (Silafont-36/Aural-2) | 0.01 – 0.02 | 0.02 |
| others (each)total ≤ 0.10 % | ≤ 0.03 | |
| Al | balance |
What surface finishes work on EN AC-43500?
Conversion coating plus e-coat or powder coat is the production standard; hard anodizing is possible for wear zones, while decorative clear anodize turns grey and blotchy because of the silicon.
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 EN AC-43500 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- AC-43500AlSi10MnMg
- Trade names
- Silafont-36Aural-2
How much does EN AC-43500 cost?
EN AC-43500 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.
EN AC-43500 — frequently asked
What is EN AC-43500 used for?
EN AC-43500 is typically used for structural die castings, crash-relevant automotive parts and shock towers. In short: most ductile Al-Si die-cast; crash-rated structural castings; weldable and heat-treatable.
What is the yield strength of EN AC-43500?
EN AC-43500 has a typical yield strength of 135 MPa (19.6 ksi) and a tensile strength of 270 MPa (39.2 ksi) — weaker than 72% of aluminum grades. Strength varies by condition: see the 5 listed tempers.
Is EN AC-43500 easy to machine?
Reasonably — machinability is rated good (62/100, better than 55% of aluminum grades). Machines like other eutectic Al-Si die castings — use PCD or diamond-coated carbide, high speed with light feeds and copious coolant; interrupted cuts through porosity are the main tool-life issue.
Can EN AC-43500 be welded?
Yes — weldability is rated very good (72/100). Good MIG/TIG/laser and CMT weldability with ER4043/ER5356-type filler thanks to near-zero Cu; success depends on low gas porosity, and remote-laser or friction-element joints are standard for casting-to-sheet assemblies.
What surface finishes work on EN AC-43500?
Conversion coating plus e-coat or powder coat is the production standard; hard anodizing is possible for wear zones, while decorative clear anodize turns grey and blotchy because of the silicon.
Can EN AC-43500 be formed, bent or molded?
Designed for vacuum-assisted high-pressure die casting of 2–4 mm walls; keep melt clean and Sr-modified, hold Fe <0.15 %, and use jet cooling/short shot times to allow later solution treatment without blistering.
What is the maximum service temperature of EN AC-43500?
EN AC-43500 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.
What is the difference between EN AC-43500-F and EN AC-43500-T6?
F is the default condition — default production condition: good strength/ductility balance straight from the die, no distortion or blister risk. T6: highest strength condition for load-bearing brackets and nodes; requires vacuum/low-gas casting to avoid solution-treat blisters. Yield strength is 135 MPa in F versus 235 MPa in T6.
How much does EN AC-43500 cost?
EN AC-43500 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
- EN 1706 — Aluminium and aluminium alloys: castings — chemical composition and mechanical properties — CEN (2020)
- Silafont-36 (AlSi10MnMg) alloy datasheet — Rheinfelden Alloys (2019)
- Aural-2 structural die casting alloy data — Rio Tinto / Alcan (2018)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 15 — Casting — ASM International (2008)
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.