Aluminum EN AC-43100-T6
Temper
EN AC-43100
T6 = solution heat treated and artificially aged
Pick for maximum strength and hardness in structural castings where 1–2 % elongation is acceptable; not applicable to conventional high-pressure die castings (blister risk).
Values for the T6 condition
Other EN AC-43100 tempers and conditions
EN AC-43100 is listed in 3 conditions; see the grade overview at EN AC-43100.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
FDefault As fabricated | Default supply condition: use when dimensional stability and cost matter more than strength; die-cast sections reach the upper end of the range. | 110 | 200 | 2.5 | 60 HB | 39 % IACS |
Solution heat treated and under-aged | Under-aged compromise: about 85 % of T6 strength with roughly double the elongation and better impact tolerance, favoured for safety-relevant chassis and bracket castings. | 185 | 225 | 4 | 80 HB | 42 % IACS |
T6This page Solution heat treated and artificially aged | Pick for maximum strength and hardness in structural castings where 1–2 % elongation is acceptable; not applicable to conventional high-pressure die castings (blister risk). | 230 | 290 | 2 | 95 HB | 40 % IACS |
What is EN AC-43100-T6?
EN AC-43100-T6 is EN AC-43100 in the T6 temper — pick for maximum strength and hardness in structural castings where 1–2 % elongation is acceptable; not applicable to conventional high-pressure die castings (blister risk). EN AC-43100-T6 has a yield strength of 230 MPa (33.4 ksi) and a tensile strength of 290 MPa (42.1 ksi) — stronger than 60% of aluminum grades. Elongation at break is 2% and the elastic modulus is 73 GPa (10.6 Msi). EN AC-43100-T6 has a density of 2.66 g/cm³ (0.0961 lb/in³), lighter than 84% of aluminum grades. It melts at 557°C (1,035 °F). F is the default condition FabDigit quotes; T6 is available on request or by drawing note.
Limitations
- Limited formability — 5/100, worse than 94% of aluminum grades
- Low fracture toughness — 16 MPa·√m (14.6 ksi·√in), worse than 89% of aluminum grades
- Limited ductility — 2%, worse than 87% of aluminum grades
EN AC-43100-T6 properties
Typical room-temperature values for EN AC-43100-T6; 41 are specific to this condition. Other listed values are EN AC-43100 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
EN AC-43100-T6 has a density of 2.66 g/cm³ (0.0961 lb/in³), lighter than 84% of aluminum grades. It melts at 557°C (1,035 °F).
Mechanical14
EN AC-43100-T6 has a yield strength of 230 MPa (33.4 ksi) and a tensile strength of 290 MPa (42.1 ksi) — stronger than 60% of aluminum grades. Elongation at break is 2% and the elastic modulus is 73 GPa (10.6 Msi).
Thermal6
EN AC-43100-T6 is rated for continuous service to 150°C (302 °F). It conducts heat at 155 W/m·K (89.6 BTU/hr·ft·°F), better than 71% of aluminum grades. Thermal expansion is 21 µm/m·K (11.7 µin/in·°F).
Electrical3
EN AC-43100-T6 conducts electricity at 40 % IACS, better than 72% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (56/100), better than 52% of aluminum grades.
Sustainability4
Producing a kilogram of EN AC-43100-T6 takes about 205 MJ of energy and emits 12.5 kg of CO₂ — more than 76% of aluminum grades. Typical recycled content is 50%.
Manufacturability8
EN AC-43100-T6's machinability is good (58/100, worse than 54% of aluminum grades); weldability good (55/100); formability not recommended (5/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with EN AC-43100-T6
Is EN AC-43100 easy to machine?
Machines freely with sharp carbide or PCD tooling and high speeds, but eutectic silicon abrades HSS quickly; watch for porosity breakout in as-cast skin.
Can EN AC-43100 be welded?
TIG/MIG weldable with AlSi5 (4043) or AlSi12 filler; degas and localise heat, and re-solution/age if T6 properties are required across the joint.
Can EN AC-43100 be formed, bent or molded?
Excellent fluidity and pressure tightness for sand, permanent-mould, low-pressure and die casting; not intended for cold forming, and conventional die castings should not be solution treated because of blistering.
What surface finishes work on EN AC-43100?
Takes chromate/phosphate conversion coatings and paint well; hard anodizing is effective but decorative anodizing turns dull grey because of the silicon phase.
EN AC-43100 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-forming element, source of fluidity | 9 – 11 | 10 |
| MgMg2Si precipitation hardening | 0.2 – 0.45 | 0.3 |
| Feimpurity; forms brittle needles | ≤ 0.55 | 0.35 |
| Culimit differs from EN AC-43000 AlSi10Mg(a) | ≤ 0.1 | — |
| Mn | ≤ 0.45 | — |
| Ni | ≤ 0.05 | — |
| Zn | ≤ 0.1 | — |
| Pb | ≤ 0.05 | — |
| Sn | ≤ 0.05 | — |
| Tigrain refinement | ≤ 0.2 | — |
| Others (each)total 0.15 max | ≤ 0.05 | — |
| Al | balance | — |
EN AC-43100-T6 — frequently asked
What is EN AC-43100-T6 used for?
EN AC-43100-T6 is typically used for automotive structural castings, hydraulic housings and pressure-tight components. In short: high-purity AlSi10Mg variant; pressure-tight castings; better ductility than (a).
What is the yield strength of EN AC-43100-T6?
EN AC-43100-T6 has a typical yield strength of 230 MPa (33.4 ksi) and a tensile strength of 290 MPa (42.1 ksi) — stronger than 60% of aluminum grades. Strength varies by condition: see the 3 listed tempers.
Is EN AC-43100-T6 easy to machine?
Reasonably — machinability is rated good (58/100, worse than 54% of aluminum grades). Machines freely with sharp carbide or PCD tooling and high speeds, but eutectic silicon abrades HSS quickly; watch for porosity breakout in as-cast skin.
Can EN AC-43100-T6 be welded?
Yes — weldability is rated good (55/100). TIG/MIG weldable with AlSi5 (4043) or AlSi12 filler; degas and localise heat, and re-solution/age if T6 properties are required across the joint.
What surface finishes work on EN AC-43100-T6?
Takes chromate/phosphate conversion coatings and paint well; hard anodizing is effective but decorative anodizing turns dull grey because of the silicon phase.
Can EN AC-43100-T6 be formed, bent or molded?
Excellent fluidity and pressure tightness for sand, permanent-mould, low-pressure and die casting; not intended for cold forming, and conventional die castings should not be solution treated because of blistering.
What is the maximum service temperature of EN AC-43100-T6?
EN AC-43100-T6 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-43100-F and EN AC-43100-T6?
F is the default condition — default supply condition: use when dimensional stability and cost matter more than strength; die-cast sections reach the upper end of the range. T6: pick for maximum strength and hardness in structural castings where 1–2 % elongation is acceptable; not applicable to conventional high-pressure die castings (blister risk). Yield strength is 110 MPa in F versus 230 MPa in T6.
Sources
- EN 1706 — Aluminium and aluminium alloys: castings, chemical composition and mechanical properties — CEN (2020)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys (A360.0 / AlSi10Mg data) — ASM International (1990)
- Aluminum Association Alloy and Temper Designations / Pink Sheets for casting alloys — The Aluminum Association (2018)
- Foundry alloy datasheets for AlSi10Mg (Rheinfelden / Trimet / Rio Tinto) — various producers (2022)
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.