Aluminum EN AC-43400
EN AC-43400
EN AC-43400 (AlSi10Mg(Fe)) is an AlSi10Mg variant with deliberately higher iron for high-pressure die casting, where the Fe content reduces die soldering.
Reference datasheet — EN AC-43400 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-43400 tempers and conditions
EN AC-43400 is supplied in 3 conditions, soft to hard. F is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
FDefault As fabricated | Standard supply condition for EN AC-43400; use for thin-wall HPDC housings and brackets where die life and fill are more critical than ductility. | 155 | 260 | 2 | 75 HB | 27 % IACS |
Cooled from hot working and artificially aged | Low-temperature ageing (typically ~160–180 °C) of the die casting to raise yield strength and stabilise dimensions without the blistering risk of solution treatment. | 195 | 280 | 1.5 | 85 HB | 29 % IACS |
Solution heat treated and artificially aged | Only for vacuum-assisted or pore-free castings; gives the highest strength but conventional HPDC parts blister at solution temperature. | 230 | 310 | 3 | 95 HB | 30 % IACS |
What is EN AC-43400?
EN AC-43400 (AlSi10Mg(Fe)) is an AlSi10Mg variant with deliberately higher iron for high-pressure die casting, where the Fe content reduces die soldering. Typical properties are 260 MPa tensile, 155 MPa yield, 2 % elongation, 75 HB, 130 W/m·K thermal conductivity and 27 % IACS, in F, T5 and T6 conditions, and it is used for thin-wall, high-volume housings and covers. The iron-rich phases cut ductility and fusion weldability (rated 35), service is limited to about 150 °C, and entrapped gas normally prevents solution treatment. Use EN AC-43500 (AlSi10MnMg) for structural, weldable or heat-treatable die castings. EN AC-43400 has a density of 2.66 g/cm³ (0.0961 lb/in³), lighter than 84% of aluminum grades. It melts at 557°C (1,035 °F). EN AC-43400 has a yield strength of 155 MPa (22.5 ksi) and a tensile strength of 260 MPa (37.7 ksi) — weaker than 63% of aluminum grades. Elongation at break is 2% and the elastic modulus is 73 GPa (10.6 Msi).
What is EN AC-43400 used for?
- die-cast automotive housings
- gearbox covers
- high-volume die castings
Limitations
- Limited ductility — 2%, worse than 87% of aluminum grades
- Low electrical conductivity — 27 % IACS, worse than 86% of aluminum grades
- Low fracture toughness — 17 MPa·√m (15.5 ksi·√in), worse than 83% of aluminum grades
- Hard to polish — 45/100, worse than 76% of aluminum grades
EN AC-43400 properties
Typical room-temperature values for EN AC-43400-F; bars are the position among aluminum grades.
Physical3
EN AC-43400 has a density of 2.66 g/cm³ (0.0961 lb/in³), lighter than 84% of aluminum grades. It melts at 557°C (1,035 °F).
Mechanical14
EN AC-43400 has a yield strength of 155 MPa (22.5 ksi) and a tensile strength of 260 MPa (37.7 ksi) — weaker than 63% of aluminum grades. Elongation at break is 2% and the elastic modulus is 73 GPa (10.6 Msi).
Thermal6
EN AC-43400 is rated for continuous service to 150°C (302 °F). It conducts heat at 130 W/m·K (75.1 BTU/hr·ft·°F), worse than 65% of aluminum grades. Thermal expansion is 21 µm/m·K (11.7 µin/in·°F).
Electrical3
EN AC-43400 conducts electricity at 27 % IACS, worse than 86% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 51% of aluminum grades.
Sustainability4
Producing a kilogram of EN AC-43400 takes about 200 MJ of energy and emits 12 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 85%.
Manufacturability6
EN AC-43400's machinability is good (65/100, better than 62% of aluminum grades); weldability 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-43400 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with EN AC-43400
Is EN AC-43400 easy to machine?
Machines easily but the eutectic Si is abrasive — use PCD or polished-flute carbide, high speed, low feed pressure; watch for subsurface porosity when machining sealing faces.
Can EN AC-43400 be welded?
Poor for fusion welding of conventional HPDC due to entrapped gas blistering; use FSW, cold-metal-transfer with ER4043/ER4047, mechanical joining or adhesive bonding instead.
Can EN AC-43400 be formed, bent or molded?
Excellent HPDC alloy: high fluidity for <2 mm walls, low hot-tearing risk, and the elevated Fe content markedly reduces die soldering and ejection problems.
EN AC-43400 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 |
|---|---|---|
| Sieutectic-forming, gives HPDC fluidity | 9 – 11 | 10 |
| Fedeliberately raised to suppress die soldering | 0.45 – 1 | 0.7 |
| Cu | ≤ 0.1 | |
| Mnmodifies Fe-phase morphology | ≤ 0.55 | 0.3 |
| MgMg2Si age-hardening | 0.2 – 0.5 | 0.35 |
| Ni | ≤ 0.15 | |
| Zn | ≤ 0.15 | |
| Pb | ≤ 0.15 | |
| Sn | ≤ 0.05 | |
| Tigrain refinement | ≤ 0.2 | |
| Others (each) | ≤ 0.05 | |
| Others (total) | ≤ 0.15 | |
| Al | balance |
What surface finishes work on EN AC-43400?
Best finished by chromate-free conversion coating, e-coat or powder coat; decorative anodizing gives a dark grey mottled film, and porosity can require impregnation before plating.
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-43400 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- AC-43400
How much does EN AC-43400 cost?
EN AC-43400 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-43400 — frequently asked
What is EN AC-43400 used for?
EN AC-43400 is typically used for die-cast automotive housings, gearbox covers and high-volume die castings. In short: high-iron HPDC grade; minimal die soldering; poor fusion weldability.
What is the yield strength of EN AC-43400?
EN AC-43400 has a typical yield strength of 155 MPa (22.5 ksi) and a tensile strength of 260 MPa (37.7 ksi) — weaker than 63% of aluminum grades. Strength varies by condition: see the 3 listed tempers.
Is EN AC-43400 easy to machine?
Reasonably — machinability is rated good (65/100, better than 62% of aluminum grades). Machines easily but the eutectic Si is abrasive — use PCD or polished-flute carbide, high speed, low feed pressure; watch for subsurface porosity when machining sealing faces.
Can EN AC-43400 be welded?
With care — weldability is rated fair (35/100). Poor for fusion welding of conventional HPDC due to entrapped gas blistering; use FSW, cold-metal-transfer with ER4043/ER4047, mechanical joining or adhesive bonding instead.
What surface finishes work on EN AC-43400?
Best finished by chromate-free conversion coating, e-coat or powder coat; decorative anodizing gives a dark grey mottled film, and porosity can require impregnation before plating.
Can EN AC-43400 be formed, bent or molded?
Excellent HPDC alloy: high fluidity for <2 mm walls, low hot-tearing risk, and the elevated Fe content markedly reduces die soldering and ejection problems.
What is the maximum service temperature of EN AC-43400?
EN AC-43400 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-43400-F and EN AC-43400-T6?
F is the default condition — standard supply condition for EN AC-43400; use for thin-wall HPDC housings and brackets where die life and fill are more critical than ductility. T6: only for vacuum-assisted or pore-free castings; gives the highest strength but conventional HPDC parts blister at solution temperature. Yield strength is 155 MPa in F versus 230 MPa in T6.
How much does EN AC-43400 cost?
EN AC-43400 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)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASM Handbook Vol. 15 — Casting — ASM International (2008)
- Die-casting alloy datasheets (AlSi10Mg / AlSi10Mg(Fe)) — European secondary aluminium producers (2022)
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.