Aluminum 240.0
AA 240.0
240.0 is a sand-casting alloy in the ANSI/AA 2xx.x family that combines magnesium with copper and is used in the as-cast F condition, historically for decorative hardware and architectural fittings where appearance matters.
Reference datasheet — 240.0 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 condition
240.0 tempers and conditions
240.0 is supplied in one standard condition, F. F is the default FabDigit quotes; the values on this page are for it.
What is 240.0?
240.0 is a sand-casting alloy in the ANSI/AA 2xx.x family that combines magnesium with copper and is used in the as-cast F condition, historically for decorative hardware and architectural fittings where appearance matters. It provides 200 MPa yield, 234 MPa tensile, 90 HB, 96 W/m·K thermal conductivity and service to 200 °C. Elongation is only 1%, fusion weldability is poor (score 20) and the copper content holds corrosion resistance to a score of 30 while giving dark, uneven anodic films. Where a brighter, more corrosion-resistant casting is required, an Al-Si-Mg alloy such as 356.0 is the usual substitute. 240.0 has a density of 2.78 g/cm³ (0.1 lb/in³), heavier than 74% of aluminum grades. It melts at 516°C (961 °F). 240.0 has a yield strength of 200 MPa (29 ksi) and a tensile strength of 234 MPa (33.9 ksi) — stronger than 53% of aluminum grades. Elongation at break is 1% and the elastic modulus is 71 GPa (10.3 Msi).
What is 240.0 used for?
- Decorative hardware castings
- Architectural fittings and trim
- Sand-cast covers and housings
- Machinery brackets and supports
- Ornamental grilles and panels
- General-purpose engineering castings
Advantages
- High service temperature — 200°C (392 °F), better than 90% of aluminum grades
Limitations
- Needs corrosion protection — 30/100, worse than 98% of aluminum grades
- Low electrical conductivity — 23 % IACS, worse than 97% of aluminum grades
- Limited ductility — 1%, worse than 95% of aluminum grades
- Poor heat conductor — 96 W/m·K (55.5 BTU/hr·ft·°F), worse than 95% of aluminum grades
- Difficult to weld — 20/100, worse than 89% of aluminum grades
240.0 properties
Typical room-temperature values for 240.0-F; bars are the position among aluminum grades.
Physical3
240.0 has a density of 2.78 g/cm³ (0.1 lb/in³), heavier than 74% of aluminum grades. It melts at 516°C (961 °F).
Mechanical11
240.0 has a yield strength of 200 MPa (29 ksi) and a tensile strength of 234 MPa (33.9 ksi) — stronger than 53% of aluminum grades. Elongation at break is 1% and the elastic modulus is 71 GPa (10.3 Msi).
Thermal6
240.0 is rated for continuous service to 200°C (392 °F). It conducts heat at 96 W/m·K (55.5 BTU/hr·ft·°F), worse than 95% of aluminum grades. Thermal expansion is 22.5 µm/m·K (12.5 µin/in·°F).
Electrical3
240.0 conducts electricity at 23 % IACS, worse than 97% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is poor (30/100), worse than 98% of aluminum grades.
Sustainability4
Producing a kilogram of 240.0 takes about 195 MJ of energy and emits 12.5 kg of CO₂ — less than 86% of aluminum grades. Typical recycled content is 40%.
Manufacturability7
240.0's machinability is good (65/100, better than 62% of aluminum grades); weldability poor (20/100).
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. 240.0 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 240.0
Is 240.0 easy to machine?
Machines well as-cast with sharp carbide/PCD tools and light feeds; hard intermetallics cause some tool wear, chips are short and easy to clear.
Can 240.0 be welded?
Poor fusion weldability — high Cu+Mg makes it hot-crack prone; repairs are usually done by mechanical means or specialist GTAW with 4043/2319-type filler and preheat.
Can 240.0 be formed, bent or molded?
Sand casting only; needs good gating/risering and chills because of wide freezing range, low fluidity and hot-tearing tendency; not suitable for die casting.
240.0 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 |
|---|---|---|
| Si | ≤ 0.5 | |
| Fe | ≤ 0.5 | |
| Cu | 7 – 9 | 8 |
| Mn | 0.3 – 0.7 | 0.5 |
| Mg | 5.5 – 6.5 | 6 |
| Ni | 0.3 – 0.7 | 0.5 |
| Zn | ≤ 0.1 | |
| Ti | ≤ 0.2 | |
| Others (each)each | ≤ 0.05 | |
| Others (total)total | ≤ 0.15 | |
| Al | balance |
What surface finishes work on 240.0?
Protect with chromate/anodic hard coat plus primer and paint; decorative anodizing is dark and blotchy owing to the high copper content; can be polished only to a semi-bright finish.
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
How much does 240.0 cost?
240.0 is a premium-cost aluminum ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
240.0 — frequently asked
What is 240.0 used for?
240.0 is typically used for decorative hardware castings, architectural fittings and trim, sand-cast covers and housings, machinery brackets and supports, ornamental grilles and panels and general-purpose engineering castings. In short: appearance-oriented sand casting; high Mg-Cu, low ductility; sand casting only.
What is the yield strength of 240.0?
240.0 has a typical yield strength of 200 MPa (29 ksi) and a tensile strength of 234 MPa (33.9 ksi) — stronger than 53% of aluminum grades.
Is 240.0 easy to machine?
Reasonably — machinability is rated good (65/100, better than 62% of aluminum grades). Machines well as-cast with sharp carbide/PCD tools and light feeds; hard intermetallics cause some tool wear, chips are short and easy to clear.
Can 240.0 be welded?
Not readily — weldability is rated poor (20/100). Poor fusion weldability — high Cu+Mg makes it hot-crack prone; repairs are usually done by mechanical means or specialist GTAW with 4043/2319-type filler and preheat.
What surface finishes work on 240.0?
Protect with chromate/anodic hard coat plus primer and paint; decorative anodizing is dark and blotchy owing to the high copper content; can be polished only to a semi-bright finish.
Can 240.0 be formed, bent or molded?
Sand casting only; needs good gating/risering and chills because of wide freezing range, low fluidity and hot-tearing tendency; not suitable for die casting.
What is the maximum service temperature of 240.0?
240.0 is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 240.0 cost?
240.0 is a premium-cost aluminum ($$$), cheaper than about 51% 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
- Registration Record of Aluminum Association Alloy Designations and Chemical Composition Limits for Aluminum Alloys in the Form of Castings and Ingot ('Pink Sheets') — The Aluminum Association (2018)
- ASTM B26/B26M — Aluminum-Alloy Sand Castings — ASTM International (2018)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASM Handbook Vol. 15 — Casting — ASM International (2008)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
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.