Aluminum EN AC-44400
EN AC-44400
EN AC-44400 (AlSi9) is a hypoeutectic aluminium-silicon casting alloy of the EN 1706 family, used as-cast (F) in permanent-mould (F-K), sand (F-S) and die-cast (F-D) form.
Reference datasheet — EN AC-44400 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-K condition
EN AC-44400 tempers and conditions
EN AC-44400 is supplied in 3 conditions, soft to hard. F-K 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 |
|---|---|---|---|---|---|---|
F | Choose for large, low-volume or complex sand castings; coarser structure gives lower strength than chill castings. | 90 | 165 | 4 | 47 HB | 37 % IACS |
F-KDefault F | Standard stocked condition: gravity die (chill) castings used as-cast; best balance of strength, ductility and soundness. | 100 | 190 | 5 | 50 HB | 37 % IACS |
F | Thin-wall, high-volume parts: rapid solidification refines the structure and raises strength and hardness, but elongation and weldability drop (entrapped gas). | 130 | 240 | 2 | 58 HB | 145 W/m·K |
What is EN AC-44400?
EN AC-44400 (AlSi9) is a hypoeutectic aluminium-silicon casting alloy of the EN 1706 family, used as-cast (F) in permanent-mould (F-K), sand (F-S) and die-cast (F-D) form. It offers good fluidity with more ductility than the eutectic AlSi12 grades: 190 MPa tensile, 100 MPa yield, 5 % elongation, 50 HB and 150 W/m·K, and it machines more freely than AlSi11 or AlSi12. There is no Cu or Mg for age hardening, so strength is moderate and service is limited to about 150 °C. EN AC-44000 (AlSi11) is the closer option when very thin walls demand maximum fluidity. EN AC-44400 has a density of 2.65 g/cm³ (0.0957 lb/in³), lighter than 90% of aluminum grades. It melts at 560°C (1,040 °F). EN AC-44400 has a yield strength of 100 MPa (14.5 ksi) and a tensile strength of 190 MPa (27.6 ksi) — weaker than 84% of aluminum grades. Elongation at break is 5% and the elastic modulus is 72 GPa (10.4 Msi).
What is EN AC-44400 used for?
- general castings
- housings
- brackets
Limitations
- Low strength — 100 MPa (14.5 ksi), worse than 84% 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-44400 properties
Typical room-temperature values for EN AC-44400-F-K; bars are the position among aluminum grades.
Physical3
EN AC-44400 has a density of 2.65 g/cm³ (0.0957 lb/in³), lighter than 90% of aluminum grades. It melts at 560°C (1,040 °F).
Mechanical16
EN AC-44400 has a yield strength of 100 MPa (14.5 ksi) and a tensile strength of 190 MPa (27.6 ksi) — weaker than 84% of aluminum grades. Elongation at break is 5% and the elastic modulus is 72 GPa (10.4 Msi).
Thermal6
EN AC-44400 is rated for continuous service to 150°C (302 °F). It conducts heat at 150 W/m·K (86.7 BTU/hr·ft·°F), better than 58% of aluminum grades. Thermal expansion is 21 µm/m·K (11.7 µin/in·°F).
Electrical3
EN AC-44400 conducts electricity at 37 % IACS, better than 58% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (58/100), better than 57% of aluminum grades.
Sustainability4
Producing a kilogram of EN AC-44400 takes about 190 MJ of energy and emits 12 kg of CO₂ — less than 89% of aluminum grades. Typical recycled content is 70%.
Manufacturability8
EN AC-44400's machinability is good (55/100, worse than 59% of aluminum grades); weldability very good (80/100); formability not recommended (12/100).
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-44400 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with EN AC-44400
Is EN AC-44400 easy to machine?
Machines freely with sharp PCD or polished-flute carbide tools and high speeds; the eutectic Si is abrasive, so avoid HSS for production runs and use flood coolant to prevent built-up edge.
Can EN AC-44400 be welded?
Readily TIG/MIG welded and weld-repaired with ER4043/AlSi5 or AlSi12 filler; die-cast parts weld poorly because of entrapped gas porosity.
Can EN AC-44400 be formed, bent or molded?
Foundry alloy only — excellent fluidity and low hot-tearing sensitivity for thin sections; use Sr or Na modification plus Ti-B grain refinement and good degassing for best ductility.
EN AC-44400 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 |
|---|---|---|
| Siprimary strengthening/fluidity element | 8 – 11 | 9.5 |
| Fehigher Fe permitted in die-cast supply | ≤ 0.65 | 0.35 |
| Cukept low for corrosion resistance | ≤ 0.1 | 0.03 |
| Mn | ≤ 0.5 | 0.2 |
| Mgtoo low for T6 age hardening | ≤ 0.1 | 0.03 |
| Ni | ≤ 0.05 | |
| Zn | ≤ 0.15 | |
| Pb | ≤ 0.05 | |
| Sn | ≤ 0.05 | |
| Tigrain refinement | ≤ 0.15 | 0.08 |
| Others (each) | ≤ 0.05 | |
| Others (total) | ≤ 0.15 | |
| Al | balance |
What surface finishes work on EN AC-44400?
Takes chromate/anodic protective coatings, powder coat and paint well after thorough degreasing; anodizing produces a grey, non-decorative film and polishing is limited by Si 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 EN AC-44400 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- AC-44400AlSi9
How much does EN AC-44400 cost?
EN AC-44400 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-44400 — frequently asked
What is EN AC-44400 used for?
EN AC-44400 is typically used for general castings, housings and brackets. In short: better ductility than AlSi12; easier machining Al-Si casting; low hot-tearing sensitivity.
What is the yield strength of EN AC-44400?
EN AC-44400 has a typical yield strength of 100 MPa (14.5 ksi) and a tensile strength of 190 MPa (27.6 ksi) — weaker than 84% of aluminum grades. Strength varies by condition: see the 3 listed tempers.
Is EN AC-44400 easy to machine?
Reasonably — machinability is rated good (55/100, worse than 59% of aluminum grades). Machines freely with sharp PCD or polished-flute carbide tools and high speeds; the eutectic Si is abrasive, so avoid HSS for production runs and use flood coolant to prevent built-up edge.
Can EN AC-44400 be welded?
Yes — weldability is rated very good (80/100). Readily TIG/MIG welded and weld-repaired with ER4043/AlSi5 or AlSi12 filler; die-cast parts weld poorly because of entrapped gas porosity.
What surface finishes work on EN AC-44400?
Takes chromate/anodic protective coatings, powder coat and paint well after thorough degreasing; anodizing produces a grey, non-decorative film and polishing is limited by Si particles.
Can EN AC-44400 be formed, bent or molded?
Foundry alloy only — excellent fluidity and low hot-tearing sensitivity for thin sections; use Sr or Na modification plus Ti-B grain refinement and good degassing for best ductility.
What is the maximum service temperature of EN AC-44400?
EN AC-44400 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-44400 F-K and EN AC-44400 F-D?
F-K is the default condition — standard stocked condition: gravity die (chill) castings used as-cast; best balance of strength, ductility and soundness. F-D: thin-wall, high-volume parts: rapid solidification refines the structure and raises strength and hardness, but elongation and weldability drop (entrapped gas). Yield strength is 100 MPa in F-K versus 130 MPa in F-D.
How much does EN AC-44400 cost?
EN AC-44400 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 — ASM International (1990)
- ASM Specialty Handbook: Aluminum and Aluminum Alloys — ASM International (1993)
- European secondary foundry alloy datasheets (AlSi9 / EN AC-44400) — Various remelters (2023)
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.