Aluminum EN AC-51300 K-F
Temper
EN AC-51300
K-F = permanent (chill) mould cast, as-cast
Choose chill casting for thinner walls, finer grain and roughly 10–15 % higher strength and ductility than sand casting.
Values for the K-F condition
Other EN AC-51300 tempers and conditions
EN AC-51300 is listed in 2 conditions; see the grade overview at EN AC-51300.
- S-F
- K-F
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
S-FDefault Sand cast, as-cast | Default supply condition: sand-cast marine/decorative parts where corrosion resistance, machinability and anodizing quality matter more than strength. | 95 | 170 | 5 | 50 HB | 35 % IACS |
K-FThis page Permanent (chill) mould cast, as-cast | Choose chill casting for thinner walls, finer grain and roughly 10–15 % higher strength and ductility than sand casting. | 105 | 195 | 7 | 55 HB | 35 % IACS |
What is EN AC-51300 K-F?
EN AC-51300 K-F is EN AC-51300 in the K-F temper — choose chill casting for thinner walls, finer grain and roughly 10–15 % higher strength and ductility than sand casting. EN AC-51300 K-F has a yield strength of 105 MPa (15.2 ksi) and a tensile strength of 195 MPa (28.3 ksi) — weaker than 84% of aluminum grades. Elongation at break is 7% and the elastic modulus is 71 GPa (10.3 Msi). EN AC-51300 K-F has a density of 2.65 g/cm³ (0.0957 lb/in³), lighter than 90% 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
- Polishes to a fine finish — 80/100, better than 93% of aluminum grades
- Easy to machine — 78/100, better than 89% of aluminum grades
- Good corrosion resistance — 74/100, better than 87% of aluminum grades
Limitations
- Limited service temperature — 100°C (212 °F), worse than 91% of aluminum grades
- Low strength — 105 MPa (15.2 ksi), worse than 84% of aluminum grades
EN AC-51300 K-F properties
Typical room-temperature values for EN AC-51300 K-F; 12 are specific to this condition. Other listed values are EN AC-51300 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
EN AC-51300 K-F has a density of 2.65 g/cm³ (0.0957 lb/in³), lighter than 90% of aluminum grades. It melts at 600°C (1,112 °F).
Mechanical11
EN AC-51300 K-F has a yield strength of 105 MPa (15.2 ksi) and a tensile strength of 195 MPa (28.3 ksi) — weaker than 84% of aluminum grades. Elongation at break is 7% and the elastic modulus is 71 GPa (10.3 Msi).
Thermal6
EN AC-51300 K-F is rated for continuous service to 100°C (212 °F). It conducts heat at 146 W/m·K (84.4 BTU/hr·ft·°F), better than 55% of aluminum grades. Thermal expansion is 24 µm/m·K (13.3 µin/in·°F).
Electrical3
EN AC-51300 K-F conducts electricity at 35 % IACS, better than 52% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (74/100), better than 87% of aluminum grades.
Sustainability4
Producing a kilogram of EN AC-51300 K-F takes about 195 MJ of energy and emits 12 kg of CO₂ — less than 86% of aluminum grades. Typical recycled content is 55%.
Manufacturability7
EN AC-51300 K-F's machinability is very good (78/100, better than 89% of aluminum grades); weldability very good (72/100); 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-51300 K-F
Is EN AC-51300 easy to machine?
Machines cleanly with the best surface finish of the cast Al alloys — sharp polished carbide, high speed, low feed, minimal built-up edge; use emulsion or MQL.
Can EN AC-51300 be welded?
Good TIG/MIG weldability with ER5356/AlMg5 filler; preheat only lightly (<120 °C), avoid Al-Si fillers and prolonged heat to prevent grain-boundary β-phase sensitization.
Can EN AC-51300 be formed, bent or molded?
Foundry-critical alloy: fluidity is modest and hot-tear/oxide-film tendency high — needs melt cover/flux protection, low pouring temperature (~700–730 °C), generous risering and Ti grain refinement; not heat treatable, used as-cast.
What surface finishes work on EN AC-51300?
Outstanding for clear, bright and colour anodizing and mechanical polishing; also takes chromate-free conversion coatings and paint — mask Mg-rich oxide by good pre-cleaning.
EN AC-51300 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 strengthening element (solid solution) | 4.5 – 6.5 | 5.5 |
| Siimpurity limit; higher Si degrades anodized appearance | ≤ 0.55 | 0.2 |
| Feimpurity limit | ≤ 0.55 | 0.25 |
| Cukept low for corrosion resistance | ≤ 0.1 | — |
| Mn | ≤ 0.45 | 0.1 |
| Zn | ≤ 0.1 | — |
| Tigrain refiner | ≤ 0.2 | 0.1 |
| Bemelt-oxidation control where permitted by local regulation | ≤ 0.01 | — |
| others (each)total 0.15 max | ≤ 0.05 | — |
| Al | balance | — |
EN AC-51300 K-F — frequently asked
What is EN AC-51300 K-F used for?
EN AC-51300 K-F is typically used for marine fittings, architectural hardware and food-grade equipment. In short: best-machining cast aluminum; weldable marine casting alloy; bright anodizing response.
What is the yield strength of EN AC-51300 K-F?
EN AC-51300 K-F has a typical yield strength of 105 MPa (15.2 ksi) and a tensile strength of 195 MPa (28.3 ksi) — weaker than 84% of aluminum grades. Strength varies by condition: see the 2 listed tempers.
Is EN AC-51300 K-F easy to machine?
Yes — machinability is rated very good (78/100, better than 89% of aluminum grades). Machines cleanly with the best surface finish of the cast Al alloys — sharp polished carbide, high speed, low feed, minimal built-up edge; use emulsion or MQL.
Can EN AC-51300 K-F be welded?
Yes — weldability is rated very good (72/100). Good TIG/MIG weldability with ER5356/AlMg5 filler; preheat only lightly (<120 °C), avoid Al-Si fillers and prolonged heat to prevent grain-boundary β-phase sensitization.
What surface finishes work on EN AC-51300 K-F?
Outstanding for clear, bright and colour anodizing and mechanical polishing; also takes chromate-free conversion coatings and paint — mask Mg-rich oxide by good pre-cleaning.
Can EN AC-51300 K-F be formed, bent or molded?
Foundry-critical alloy: fluidity is modest and hot-tear/oxide-film tendency high — needs melt cover/flux protection, low pouring temperature (~700–730 °C), generous risering and Ti grain refinement; not heat treatable, used as-cast.
What is the maximum service temperature of EN AC-51300 K-F?
EN AC-51300 K-F is rated for continuous use to about 100°C (212 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between EN AC-51300 S-F and EN AC-51300 K-F?
S-F is the default condition — default supply condition: sand-cast marine/decorative parts where corrosion resistance, machinability and anodizing quality matter more than strength. K-F: choose chill casting for thinner walls, finer grain and roughly 10–15 % higher strength and ductility than sand casting. Yield strength is 95 MPa in S-F versus 105 MPa in K-F.
Sources
- EN 1706 — Aluminium and aluminium alloys: castings, chemical composition and mechanical properties — CEN (2020)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys (514.0 data) — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials (aluminium alloys) — ASM International (2005)
- GB/T 1173 (ZL301/Al-Mg equivalent practice) — SAC (2013)
- Foundry alloy datasheets for AlMg5 / EN AC-51300 — Rheinfelden Alloys / Trimet (2021)
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.