Aluminum EN AC-44400 F-S
Temper
EN AC-44400
Choose for large, low-volume or complex sand castings; coarser structure gives lower strength than chill castings.
Values for the F-S condition
Other EN AC-44400 tempers and conditions
EN AC-44400 is listed in 3 conditions; see the grade overview at EN AC-44400.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
F-SThis page 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 F-S?
EN AC-44400 F-S is EN AC-44400 in the F-S temper — choose for large, low-volume or complex sand castings; coarser structure gives lower strength than chill castings. EN AC-44400 F-S has a yield strength of 90 MPa (13.1 ksi) and a tensile strength of 165 MPa (23.9 ksi) — weaker than 87% of aluminum grades. Elongation at break is 4% and the elastic modulus is 71 GPa (10.3 Msi). EN AC-44400 F-S 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). F-K is the default condition FabDigit quotes; F-S is available on request or by drawing note.
Limitations
- Low fracture toughness — 16 MPa·√m (14.6 ksi·√in), worse than 89% of aluminum grades
- Low strength — 90 MPa (13.1 ksi), worse than 87% of aluminum grades
- Limited formability — 10/100, worse than 80% of aluminum grades
- Hard to polish — 45/100, worse than 76% of aluminum grades
EN AC-44400 F-S properties
Typical room-temperature values for EN AC-44400 F-S; 22 are specific to this condition. Other listed values are EN AC-44400 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
EN AC-44400 F-S 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 F-S has a yield strength of 90 MPa (13.1 ksi) and a tensile strength of 165 MPa (23.9 ksi) — weaker than 87% of aluminum grades. Elongation at break is 4% and the elastic modulus is 71 GPa (10.3 Msi).
Thermal6
EN AC-44400 F-S 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 F-S conducts electricity at 37 % IACS, better than 58% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (56/100), better than 52% of aluminum grades.
Sustainability4
Producing a kilogram of EN AC-44400 F-S 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 F-S's machinability is good (58/100, worse than 54% of aluminum grades); weldability very good (80/100); formability not recommended (10/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with EN AC-44400 F-S
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.
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.
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 | — |
EN AC-44400 F-S — frequently asked
What is EN AC-44400 F-S used for?
EN AC-44400 F-S 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 F-S?
EN AC-44400 F-S has a typical yield strength of 90 MPa (13.1 ksi) and a tensile strength of 165 MPa (23.9 ksi) — weaker than 87% of aluminum grades. Strength varies by condition: see the 3 listed tempers.
Is EN AC-44400 F-S easy to machine?
Reasonably — machinability is rated good (58/100, worse than 54% 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 F-S 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 F-S?
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 F-S 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 F-S?
EN AC-44400 F-S 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.