Aluminum EN AC-51100 K-F
Temper
EN AC-51100
K-F = permanent (gravity die) cast, as-cast
Choose for higher-volume die-cast-quality parts; faster solidification gives finer structure and slightly better ductility.
Values for the K-F condition
Other EN AC-51100 tempers and conditions
EN AC-51100 is listed in 3 conditions; see the grade overview at EN AC-51100.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Sand cast, stress relieved / stabilizing anneal | Use when dimensional stability after machining or maximum stress-corrosion safety is required; slightly lower strength, higher elongation. | 70 | 145 | 6 | 47 HB | 25 % IACS |
S-FDefault Sand cast, as-cast | Standard supply condition for marine fittings and housings cast in sand moulds. | 80 | 150 | 4 | 50 HB | 25 % IACS |
K-FThis page Permanent (gravity die) cast, as-cast | Choose for higher-volume die-cast-quality parts; faster solidification gives finer structure and slightly better ductility. | 80 | 160 | 5 | 50 HB | 25 % IACS |
What is EN AC-51100 K-F?
EN AC-51100 K-F is EN AC-51100 in the K-F temper — choose for higher-volume die-cast-quality parts; faster solidification gives finer structure and slightly better ductility. EN AC-51100 K-F has a yield strength of 80 MPa (11.6 ksi) and a tensile strength of 160 MPa (23.2 ksi) — weaker than 90% of aluminum grades. Elongation at break is 5% and the elastic modulus is 70 GPa (10.2 Msi). EN AC-51100 K-F has a density of 2.66 g/cm³ (0.0961 lb/in³), lighter than 84% of aluminum grades. It melts at 600°C (1,112 °F). S-F is the default condition FabDigit quotes; K-F is available on request or by drawing note.
Advantages
- Good corrosion resistance — 80/100, better than 97% of aluminum grades
- Polishes to a fine finish — 80/100, better than 93% of aluminum grades
Limitations
- Low electrical conductivity — 25 % IACS, worse than 92% of aluminum grades
- Low strength — 80 MPa (11.6 ksi), worse than 90% of aluminum grades
- Limited service temperature — 120°C (248 °F), worse than 79% of aluminum grades
EN AC-51100 K-F properties
Typical room-temperature values for EN AC-51100 K-F; 20 are specific to this condition. Other listed values are EN AC-51100 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
EN AC-51100 K-F has a density of 2.66 g/cm³ (0.0961 lb/in³), lighter than 84% of aluminum grades. It melts at 600°C (1,112 °F).
Mechanical12
EN AC-51100 K-F has a yield strength of 80 MPa (11.6 ksi) and a tensile strength of 160 MPa (23.2 ksi) — weaker than 90% of aluminum grades. Elongation at break is 5% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
EN AC-51100 K-F is rated for continuous service to 120°C (248 °F). It conducts heat at 145 W/m·K (83.8 BTU/hr·ft·°F), better than 53% of aluminum grades. Thermal expansion is 24 µm/m·K (13.3 µin/in·°F).
Electrical3
EN AC-51100 K-F conducts electricity at 25 % IACS, worse than 92% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (80/100), better than 97% of aluminum grades.
Sustainability4
Producing a kilogram of EN AC-51100 K-F takes about 200 MJ of energy and emits 12.5 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 45%.
Manufacturability8
EN AC-51100 K-F's machinability is very good (70/100, better than 72% of aluminum grades); weldability very good (80/100); 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-51100 K-F
Is EN AC-51100 easy to machine?
Machines freely with sharp polished-flute carbide tools, high speed and generous coolant; slightly gummy chips, so use high rake and chip breakers to avoid built-up edge.
Can EN AC-51100 be welded?
Readily TIG/MIG welded with ER5356 (Al-5Mg) filler; clean oxide thoroughly, no post-weld heat treatment needed since the alloy is non-heat-treatable.
Can EN AC-51100 be formed, bent or molded?
Poor fluidity and strong oxide/hot-tear tendency — needs good gating, degassing, flux/cover protection and generous fillets; not suited to thin or intricate sections.
What surface finishes work on EN AC-51100?
Excellent bright and hard anodizing due to low silicon; polishes to a high lustre, and accepts chromate-free conversion coatings and paint well.
EN AC-51100 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 |
|---|---|---|
| Mgprincipal solid-solution strengthener | 2.5 – 3.5 | 3 |
| Si | ≤ 0.55 | 0.2 |
| Fe | ≤ 0.55 | 0.3 |
| Cukept low for corrosion resistance | ≤ 0.1 | 0.03 |
| Mn | ≤ 0.45 | 0.2 |
| Zn | ≤ 0.1 | — |
| Tigrain refiner | ≤ 0.2 | 0.1 |
| Others (each) | ≤ 0.05 | — |
| Others (total) | ≤ 0.15 | — |
| Al | balance | — |
EN AC-51100 K-F — frequently asked
What is EN AC-51100 K-F used for?
EN AC-51100 K-F is typically used for marine fittings, decorative castings and food equipment. In short: marine-grade cast aluminum; best anodizing of cast alloys; non-heat-treatable, as-cast use.
What is the yield strength of EN AC-51100 K-F?
EN AC-51100 K-F has a typical yield strength of 80 MPa (11.6 ksi) and a tensile strength of 160 MPa (23.2 ksi) — weaker than 90% of aluminum grades. Strength varies by condition: see the 3 listed tempers.
Is EN AC-51100 K-F easy to machine?
Yes — machinability is rated very good (70/100, better than 72% of aluminum grades). Machines freely with sharp polished-flute carbide tools, high speed and generous coolant; slightly gummy chips, so use high rake and chip breakers to avoid built-up edge.
Can EN AC-51100 K-F be welded?
Yes — weldability is rated very good (80/100). Readily TIG/MIG welded with ER5356 (Al-5Mg) filler; clean oxide thoroughly, no post-weld heat treatment needed since the alloy is non-heat-treatable.
What surface finishes work on EN AC-51100 K-F?
Excellent bright and hard anodizing due to low silicon; polishes to a high lustre, and accepts chromate-free conversion coatings and paint well.
Can EN AC-51100 K-F be formed, bent or molded?
Poor fluidity and strong oxide/hot-tear tendency — needs good gating, degassing, flux/cover protection and generous fillets; not suited to thin or intricate sections.
What is the maximum service temperature of EN AC-51100 K-F?
EN AC-51100 K-F is rated for continuous use to about 120°C (248 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between EN AC-51100 S-F and EN AC-51100 S-O?
S-F is the default condition — standard supply condition for marine fittings and housings cast in sand moulds. S-O: use when dimensional stability after machining or maximum stress-corrosion safety is required; slightly lower strength, higher elongation. Yield strength is 80 MPa in S-F versus 70 MPa in S-O.
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 Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
- DIN 1725-2 (withdrawn) — Cast aluminium alloys, G-AlMg3 — DIN (1986)
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.