Aluminum EN AC-71100
EN AC-71100
EN AC-71100 (AlZn10Si8Mg) is a zinc-bearing Al-Si casting alloy that strengthens by natural ageing in the T1 condition, so no solution treatment or quench is needed and castings stay dimensionally stable.
Reference datasheet — EN AC-71100 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 T1 condition
EN AC-71100 tempers and conditions
EN AC-71100 is supplied in 3 conditions, soft to hard. T1 is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As fabricated | Freshly cast condition; use when parts are machined immediately after casting and full self-hardening has not yet developed. | 150 | 230 | 2 | 70 HB | 28 % IACS |
T1Default Cooled from hot working and naturally aged | Standard supply condition: after 2–4 weeks at room temperature the alloy self-hardens, giving maximum strength with no solution treatment or quench distortion. | 205 | 270 | 1.5 | 90 HB | 27 % IACS |
Cooled from hot working and artificially aged | Short low-temperature age (typ. ~2–5 h at 130–160 °C) used to reach stable T1-level properties in hours instead of weeks. | 215 | 275 | 1.2 | 95 HB | 26 % IACS |
What is EN AC-71100?
EN AC-71100 (AlZn10Si8Mg) is a zinc-bearing Al-Si casting alloy that strengthens by natural ageing in the T1 condition, so no solution treatment or quench is needed and castings stay dimensionally stable. Typical values are 270 MPa tensile, 205 MPa yield, 1.5 % elongation and 90 HB with 27 % IACS and service to 150 °C, mainly in high-pressure die-cast and gravity-cast housings, brackets and automotive components. Ductility is low, the alloy is effectively unweldable by fusion methods, and clear decorative anodizing gives uneven films. EN AC-46000 (AlSi9Cu3) is the usual alternative where established die-casting practice and lower cost matter more. EN AC-71100 has a density of 2.9 g/cm³ (0.105 lb/in³), heavier than 98% of aluminum grades. It melts at 550°C (1,022 °F). EN AC-71100 has a yield strength of 205 MPa (29.7 ksi) and a tensile strength of 270 MPa (39.2 ksi) — stronger than 54% of aluminum grades. Elongation at break is 1.5% and the elastic modulus is 71 GPa (10.3 Msi).
What is EN AC-71100 used for?
- die-cast housings
- automotive components
- general-purpose castings requiring natural aging
Advantages
- Easy to machine — 72/100, better than 80% of aluminum grades
Limitations
- Limited formability — 5/100, worse than 94% of aluminum grades
- Low fracture toughness — 15 MPa·√m (13.7 ksi·√in), worse than 93% of aluminum grades
- Limited ductility — 1.5%, worse than 91% of aluminum grades
- Difficult to weld — 20/100, worse than 89% of aluminum grades
- Poor heat conductor — 110 W/m·K (63.6 BTU/hr·ft·°F), worse than 88% of aluminum grades
EN AC-71100 properties
Typical room-temperature values for EN AC-71100-T1; bars are the position among aluminum grades.
Physical3
EN AC-71100 has a density of 2.9 g/cm³ (0.105 lb/in³), heavier than 98% of aluminum grades. It melts at 550°C (1,022 °F).
Mechanical15
EN AC-71100 has a yield strength of 205 MPa (29.7 ksi) and a tensile strength of 270 MPa (39.2 ksi) — stronger than 54% of aluminum grades. Elongation at break is 1.5% and the elastic modulus is 71 GPa (10.3 Msi).
Thermal6
EN AC-71100 is rated for continuous service to 150°C (302 °F). It conducts heat at 110 W/m·K (63.6 BTU/hr·ft·°F), worse than 88% of aluminum grades. Thermal expansion is 21.5 µm/m·K (11.9 µin/in·°F).
Electrical3
EN AC-71100 conducts electricity at 27 % IACS, worse than 86% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is fair (40/100), worse than 75% of aluminum grades.
Sustainability4
Producing a kilogram of EN AC-71100 takes about 190 MJ of energy and emits 11.5 kg of CO₂ — less than 89% of aluminum grades. Typical recycled content is 50%.
Manufacturability8
EN AC-71100's machinability is very good (72/100, better than 80% of aluminum grades); weldability poor (20/100); formability not recommended (5/100).
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. EN AC-71100 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with EN AC-71100
Is EN AC-71100 easy to machine?
Machines freely with sharp carbide or PCD tooling and high speeds; Si particles cause abrasive wear, and the naturally aged state machines cleaner than the soft as-cast state.
Can EN AC-71100 be welded?
Essentially unweldable by fusion methods — die-cast gas porosity blisters and the high Zn volatilizes; use mechanical fastening or adhesive bonding.
Can EN AC-71100 be formed, bent or molded?
High-pressure die casting alloy with good fluidity at 8 % Si; keep dies at 180–250 °C, avoid heavy sections and slow fill to limit hot tearing and shrink porosity.
EN AC-71100 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 | 7.5 – 9.5 | 8.5 |
| Znprovides natural-aging (self-hardening) response with Mg | 9 – 11 | 10 |
| Mg | 0.2 – 0.5 | 0.35 |
| Fedie-cast limit; lower for gravity casting | ≤ 1.3 | |
| Cu | ≤ 0.35 | |
| Mn | ≤ 0.5 | |
| Ti | ≤ 0.25 | |
| Ni | ≤ 0.05 | |
| Pb | ≤ 0.1 | |
| Sn | ≤ 0.05 | |
| Others (each)total ≤ 0.15 | ≤ 0.05 | |
| Al | balance |
What surface finishes work on EN AC-71100?
Take chromate-free conversion coating, powder coat or paint; anodizing gives dark, uneven films, so decorative clear anodize is not recommended (hard anodize is workable).
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
Equivalent designations
Standards and trade names that resolve to Aluminum EN AC-71100 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- AC-7110071100-T1AlZn10Si8Mg
How much does EN AC-71100 cost?
EN AC-71100 is a standard-cost aluminum ($$), cheaper than about 71% 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.
EN AC-71100 — frequently asked
What is EN AC-71100 used for?
EN AC-71100 is typically used for die-cast housings, automotive components and general-purpose castings requiring natural aging. In short: self-ageing die-cast alloy; no solution treatment required; not fusion weldable.
What is the yield strength of EN AC-71100?
EN AC-71100 has a typical yield strength of 205 MPa (29.7 ksi) and a tensile strength of 270 MPa (39.2 ksi) — stronger than 54% of aluminum grades. Strength varies by condition: see the 3 listed tempers.
Is EN AC-71100 easy to machine?
Yes — machinability is rated very good (72/100, better than 80% of aluminum grades). Machines freely with sharp carbide or PCD tooling and high speeds; Si particles cause abrasive wear, and the naturally aged state machines cleaner than the soft as-cast state.
Can EN AC-71100 be welded?
Not readily — weldability is rated poor (20/100). Essentially unweldable by fusion methods — die-cast gas porosity blisters and the high Zn volatilizes; use mechanical fastening or adhesive bonding.
What surface finishes work on EN AC-71100?
Take chromate-free conversion coating, powder coat or paint; anodizing gives dark, uneven films, so decorative clear anodize is not recommended (hard anodize is workable).
Can EN AC-71100 be formed, bent or molded?
High-pressure die casting alloy with good fluidity at 8 % Si; keep dies at 180–250 °C, avoid heavy sections and slow fill to limit hot tearing and shrink porosity.
What is the maximum service temperature of EN AC-71100?
EN AC-71100 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-71100-T1 and EN AC-71100-F?
T1 is the default condition — standard supply condition: after 2–4 weeks at room temperature the alloy self-hardens, giving maximum strength with no solution treatment or quench distortion. F: freshly cast condition; use when parts are machined immediately after casting and full self-hardening has not yet developed. Yield strength is 205 MPa in T1 versus 150 MPa in F.
How much does EN AC-71100 cost?
EN AC-71100 is a standard-cost aluminum ($$), cheaper than about 71% 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
- EN 1706 — Aluminium and aluminium alloys — Castings — Chemical composition and mechanical properties — CEN (2020)
- EN 1780-1/-2 — Designation of alloyed aluminium ingots for remelting — CEN (2002)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 15 — Casting — ASM International (2008)
- European die-casting alloy ingot datasheets (AlZn10Si8Mg self-hardening alloy) — EU secondary aluminium producers (2022)
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.