Aluminum EN AC-71000
EN AC-71000 · ASTM 712.0
EN AC-71000 (AlZn10Si8Mg, ZL401, 712.0) is an Al-Zn-Si-Mg casting alloy that develops strength by natural aging, reaching 145 MPa yield, 215 MPa tensile, 4% elongation and 62 HB without solution heat treatment.
Reference datasheet — EN AC-71000 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
EN AC-71000 tempers and conditions
EN AC-71000 is supplied in 4 conditions, soft to hard. F is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
FDefault As fabricated | Standard supply condition: sand-cast and naturally aged for ~2–4 weeks; no solution treatment, best dimensional stability. | 145 | 215 | 4 | 62 HB | 30 % IACS |
Cooled from hot working and naturally aged | Chinese/GB practice for ZL401: hold the casting at room temperature (typically >10–30 days) so MgZn2 precipitation completes before machining. | 155 | 220 | 2.5 | 85 HB | 30 % IACS |
F | Choose for thinner sections and higher strength: chill casting refines the structure and raises UTS/hardness at similar ductility. | 160 | 235 | 4 | 70 HB | 30 % IACS |
Cooled from hot working and artificially aged | Optional short low-temperature age (roughly 140–170 °C) used by some foundries to accelerate and stabilise the natural-aging response before final machining. | 170 | 225 | 2 | 80 HB | 32 % IACS |
What is EN AC-71000?
EN AC-71000 (AlZn10Si8Mg, ZL401, 712.0) is an Al-Zn-Si-Mg casting alloy that develops strength by natural aging, reaching 145 MPa yield, 215 MPa tensile, 4% elongation and 62 HB without solution heat treatment. Engineers specify it for dimensional stability, machinability (72/100) and freedom from quench distortion, usually as sand or gravity permanent-mould castings in F, F-K, T1 and T5 condition. Ductility is low, the wide freezing range needs generous feeding, and stress-corrosion sensitivity plus dull anodizing limit cosmetic and severe-environment use; maximum service temperature is 150 °C. EN AC-71000 has a density of 2.85 g/cm³ (0.103 lb/in³), heavier than 96% of aluminum grades. It melts at 550°C (1,022 °F). EN AC-71000 has a yield strength of 145 MPa (21 ksi) and a tensile strength of 215 MPa (31.2 ksi) — weaker than 68% of aluminum grades. Elongation at break is 4% and the elastic modulus is 72 GPa (10.4 Msi).
What is EN AC-71000 used for?
- molds and jigs
- tooling plates
- general castings requiring no heat treatment
Advantages
- Easy to machine — 72/100, better than 80% of aluminum grades
Limitations
- Low fracture toughness — 17 MPa·√m (15.5 ksi·√in), worse than 83% of aluminum grades
- Limited formability — 10/100, worse than 80% of aluminum grades
EN AC-71000 properties
Typical room-temperature values for EN AC-71000-F; bars are the position among aluminum grades.
Physical3
EN AC-71000 has a density of 2.85 g/cm³ (0.103 lb/in³), heavier than 96% of aluminum grades. It melts at 550°C (1,022 °F).
Mechanical14
EN AC-71000 has a yield strength of 145 MPa (21 ksi) and a tensile strength of 215 MPa (31.2 ksi) — weaker than 68% of aluminum grades. Elongation at break is 4% and the elastic modulus is 72 GPa (10.4 Msi).
Thermal6
EN AC-71000 is rated for continuous service to 150°C (302 °F). It conducts heat at 125 W/m·K (72.2 BTU/hr·ft·°F), worse than 72% of aluminum grades. Thermal expansion is 22.5 µm/m·K (12.5 µin/in·°F).
Electrical3
EN AC-71000 conducts electricity at 30 % IACS, worse than 73% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is fair (45/100), worse than 62% of aluminum grades.
Sustainability4
Producing a kilogram of EN AC-71000 takes about 180 MJ of energy and emits 11.5 kg of CO₂ — less than 91% of aluminum grades. Typical recycled content is 60%.
Manufacturability8
EN AC-71000's machinability is very good (72/100, better than 80% of aluminum grades); weldability fair (40/100); formability not recommended (10/100).
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-71000 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with EN AC-71000
Is EN AC-71000 easy to machine?
Machines cleanly with sharp polished carbide, high speed and low feed; dimensionally very stable after natural aging, so finish-machine only after the age is complete.
Can EN AC-71000 be welded?
TIG/MIG repair welding is possible with 5356 or matched Al-Zn-Mg filler but hot cracking and post-weld SCC risk are real — preheat lightly and avoid highly restrained joints.
Can EN AC-71000 be formed, bent or molded?
Sand or gravity permanent-mould casting with good feeding and moderate pouring temperature (≈690–720 °C); wide freezing range demands generous risers and chills to avoid shrinkage porosity and hot tears.
EN AC-71000 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 |
|---|---|---|
| Sieutectic former, gives fluidity | 7.5 – 9.5 | 8.5 |
| Znwith Mg forms MgZn2 for self-hardening | 9 – 11 | 10 |
| Mg | 0.2 – 0.5 | 0.35 |
| Fe | ≤ 0.8 | |
| Cu | ≤ 0.35 | |
| Mn | ≤ 0.5 | |
| Ni | ≤ 0.1 | |
| Tigrain refiner | ≤ 0.25 | 0.1 |
| Pb | ≤ 0.1 | |
| Sn | ≤ 0.05 | |
| Others (each)total 0.25 max | ≤ 0.05 | |
| Al | balance |
What surface finishes work on EN AC-71000?
Anodizes to a dull grey (decorative colour match poor); chromate/organic coating or paint is the usual protection, and impregnation may be needed for pressure-tight castings.
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-71000 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- 712.0
- EN / DIN / Werkstoff-Nr.
- AC-71000AlZn10Si8Mg
- Also called
- ZAlZn11Si7
- Similar grades
- ZL401
How much does EN AC-71000 cost?
EN AC-71000 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-71000 — frequently asked
What is EN AC-71000 used for?
EN AC-71000 is typically used for molds and jigs, tooling plates and general castings requiring no heat treatment. In short: self-aging cast alloy; stable tooling-plate castings; no solution treatment needed.
What is the yield strength of EN AC-71000?
EN AC-71000 has a typical yield strength of 145 MPa (21 ksi) and a tensile strength of 215 MPa (31.2 ksi) — weaker than 68% of aluminum grades. Strength varies by condition: see the 4 listed tempers.
Is EN AC-71000 easy to machine?
Yes — machinability is rated very good (72/100, better than 80% of aluminum grades). Machines cleanly with sharp polished carbide, high speed and low feed; dimensionally very stable after natural aging, so finish-machine only after the age is complete.
Can EN AC-71000 be welded?
With care — weldability is rated fair (40/100). TIG/MIG repair welding is possible with 5356 or matched Al-Zn-Mg filler but hot cracking and post-weld SCC risk are real — preheat lightly and avoid highly restrained joints.
What surface finishes work on EN AC-71000?
Anodizes to a dull grey (decorative colour match poor); chromate/organic coating or paint is the usual protection, and impregnation may be needed for pressure-tight castings.
Can EN AC-71000 be formed, bent or molded?
Sand or gravity permanent-mould casting with good feeding and moderate pouring temperature (≈690–720 °C); wide freezing range demands generous risers and chills to avoid shrinkage porosity and hot tears.
What is the maximum service temperature of EN AC-71000?
EN AC-71000 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-71000-F and EN AC-71000-T5?
F is the default condition — standard supply condition: sand-cast and naturally aged for ~2–4 weeks; no solution treatment, best dimensional stability. T5: optional short low-temperature age (roughly 140–170 °C) used by some foundries to accelerate and stabilise the natural-aging response before final machining. Yield strength is 145 MPa in F versus 170 MPa in T5.
How much does EN AC-71000 cost?
EN AC-71000 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)
- GB/T 1173 (ZL401 / ZAlZn11Si7) — SAC (2013)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
- Aluminum Association Teal Sheets / registered casting alloy 712.0 data — The Aluminum Association (2015)
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.