Aluminum EN AC-44000 F-S
Temper
EN AC-44000
F-S = s/F
Pick for large or low-volume castings; slower cooling coarsens the eutectic so strength and fatigue are slightly below chill-cast.
Values for the F-S condition
Other EN AC-44000 tempers and conditions
EN AC-44000 is listed in 3 conditions; see the grade overview at EN AC-44000.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
F-SThis page S/F | Pick for large or low-volume castings; slower cooling coarsens the eutectic so strength and fatigue are slightly below chill-cast. | 75 | 170 | 8 | 48 HB | 148 W/m·K |
L/F | Use for thin-walled, near-net-shape precision castings where fluidity matters more than strength. | 75 | 170 | 8 | 48 HB | 25 % IACS |
F-KDefault K/F | Standard supply condition: gravity die (chill) cast and used as-cast — fastest solidification, best strength/ductility of the F conditions. | 85 | 190 | 9 | 50 HB | 25 % IACS |
What is EN AC-44000 F-S?
EN AC-44000 F-S is EN AC-44000 in the F-S temper — pick for large or low-volume castings; slower cooling coarsens the eutectic so strength and fatigue are slightly below chill-cast. EN AC-44000 F-S has a yield strength of 75 MPa (10.9 ksi) and a tensile strength of 170 MPa (24.7 ksi) — weaker than 91% of aluminum grades. Elongation at break is 8% and the elastic modulus is 72 GPa (10.4 Msi). EN AC-44000 F-S has a density of 2.65 g/cm³ (0.0957 lb/in³), lighter than 90% of aluminum grades. It melts at 574°C (1,065 °F). F-K is the default condition FabDigit quotes; F-S is available on request or by drawing note.
Advantages
- Readily welded — 85/100, better than 79% of aluminum grades
Limitations
- Low electrical conductivity — 25 % IACS, worse than 92% of aluminum grades
- Low strength — 75 MPa (10.9 ksi), worse than 91% 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-44000 F-S properties
Typical room-temperature values for EN AC-44000 F-S; 10 are specific to this condition. Other listed values are EN AC-44000 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
EN AC-44000 F-S has a density of 2.65 g/cm³ (0.0957 lb/in³), lighter than 90% of aluminum grades. It melts at 574°C (1,065 °F).
Mechanical13
EN AC-44000 F-S has a yield strength of 75 MPa (10.9 ksi) and a tensile strength of 170 MPa (24.7 ksi) — weaker than 91% of aluminum grades. Elongation at break is 8% and the elastic modulus is 72 GPa (10.4 Msi).
Thermal6
EN AC-44000 F-S is rated for continuous service to 150°C (302 °F). It conducts heat at 148 W/m·K (85.5 BTU/hr·ft·°F), better than 56% of aluminum grades. Thermal expansion is 20.5 µm/m·K (11.4 µin/in·°F).
Electrical3
EN AC-44000 F-S conducts electricity at 25 % IACS, worse than 92% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), better than 62% of aluminum grades.
Sustainability4
Producing a kilogram of EN AC-44000 F-S takes about 200 MJ of energy and emits 12 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 60%.
Manufacturability8
EN AC-44000 F-S's machinability is fair (45/100, worse than 72% of aluminum grades); weldability excellent (85/100); formability poor (15/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with EN AC-44000 F-S
Is EN AC-44000 easy to machine?
Machines freely but the eutectic Si is abrasive — use polycrystalline-diamond or coated carbide, high speed, sharp positive rake and generous coolant to avoid built-up edge.
Can EN AC-44000 be welded?
Excellent TIG/MIG weldability with ER4047 or ER4043 filler; near-eutectic composition means very low hot-cracking risk, no post-weld heat treatment needed.
Can EN AC-44000 be formed, bent or molded?
Foundry alloy only — outstanding fluidity and pressure tightness for thin walls (down to ~2 mm) in sand, gravity die and investment moulds; Sr modification and Ti-B grain refinement recommended.
What surface finishes work on EN AC-44000?
Chromate/chrome-free conversion coating or powder paint adheres well; anodizing gives a dark grey non-decorative film; polishing limited by Si pull-out.
EN AC-44000 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 |
|---|---|---|
| Sinear-eutectic; Sr or Na modification usual | 10 – 11.8 | 11 |
| Felow Fe to avoid brittle β-AlFeSi platelets | ≤ 0.19 | 0.12 |
| Cu | ≤ 0.05 | — |
| Mn | ≤ 0.1 | — |
| Mgusually kept <0.10 when as-cast ductility is required | ≤ 0.45 | — |
| Zn | ≤ 0.07 | — |
| Tigrain refinement | ≤ 0.15 | 0.1 |
| Others (each) | ≤ 0.05 | — |
| Others (total) | ≤ 0.15 | — |
| Al | balance | — |
EN AC-44000 F-S — frequently asked
What is EN AC-44000 F-S used for?
EN AC-44000 F-S is typically used for thin-wall castings, housings and general purpose sand/permanent mold castings. In short: top-fluidity casting alloy; weldable eutectic Al-Si; best ductility among AlSi11/12.
What is the yield strength of EN AC-44000 F-S?
EN AC-44000 F-S has a typical yield strength of 75 MPa (10.9 ksi) and a tensile strength of 170 MPa (24.7 ksi) — weaker than 91% of aluminum grades. Strength varies by condition: see the 3 listed tempers.
Is EN AC-44000 F-S easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 72% of aluminum grades). Machines freely but the eutectic Si is abrasive — use polycrystalline-diamond or coated carbide, high speed, sharp positive rake and generous coolant to avoid built-up edge.
Can EN AC-44000 F-S be welded?
Yes — weldability is rated excellent (85/100). Excellent TIG/MIG weldability with ER4047 or ER4043 filler; near-eutectic composition means very low hot-cracking risk, no post-weld heat treatment needed.
What surface finishes work on EN AC-44000 F-S?
Chromate/chrome-free conversion coating or powder paint adheres well; anodizing gives a dark grey non-decorative film; polishing limited by Si pull-out.
Can EN AC-44000 F-S be formed, bent or molded?
Foundry alloy only — outstanding fluidity and pressure tightness for thin walls (down to ~2 mm) in sand, gravity die and investment moulds; Sr modification and Ti-B grain refinement recommended.
What is the maximum service temperature of EN AC-44000 F-S?
EN AC-44000 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-44000 F-K and EN AC-44000 F-S?
F-K is the default condition — standard supply condition: gravity die (chill) cast and used as-cast — fastest solidification, best strength/ductility of the F conditions. F-S: pick for large or low-volume castings; slower cooling coarsens the eutectic so strength and fatigue are slightly below chill-cast. Yield strength is 85 MPa in F-K versus 75 MPa in F-S.
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)
- Primary foundry alloy datasheets (AlSi11 / Silafont family) — Rheinfelden Alloys (2019)
- European Aluminium — Aluminium Automotive Manual, casting alloys — European Aluminium Association (2011)
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.