Aluminum EN AC-43300-T6
Temper · default condition
EN AC-43300
T6 = solution heat treated and artificially aged
Standard high-strength condition for structural chassis and powertrain castings where peak yield strength and hardness matter more than elongation.
Values for the T6 condition
Other EN AC-43300 tempers and conditions
EN AC-43300 is listed in 4 conditions; see the grade overview at EN AC-43300.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As fabricated | Pick when the part is dimensionally critical or gas-porous (die cast) and moderate strength is enough — no solution-treatment blistering or distortion risk. | 95 | 180 | 3 | 60 HB | 39 % IACS |
Cooled from hot working and artificially aged | Low-distortion compromise for die castings: some Mg2Si strengthening and dimensional stabilisation without a full solution soak and quench. | 150 | 210 | 2.5 | 72 HB | 39 % IACS |
Solution heat treated and under-aged | Choose when crash ductility, energy absorption or self-piercing riveting/joining of the casting is required — trades ~15 % strength for roughly 50 % more elongation than T6. | 180 | 250 | 6 | 80 HB | 42 % IACS |
T6DefaultThis page Solution heat treated and artificially aged | Standard high-strength condition for structural chassis and powertrain castings where peak yield strength and hardness matter more than elongation. | 210 | 290 | 4 | 90 HB | 39 % IACS |
What is EN AC-43300-T6?
EN AC-43300-T6 is EN AC-43300 in the T6 temper — standard high-strength condition for structural chassis and powertrain castings where peak yield strength and hardness matter more than elongation. EN AC-43300-T6 has a yield strength of 210 MPa (30.5 ksi) and a tensile strength of 290 MPa (42.1 ksi) — stronger than 56% of aluminum grades. Elongation at break is 4% and the elastic modulus is 73 GPa (10.6 Msi). EN AC-43300-T6 has a density of 2.65 g/cm³ (0.0957 lb/in³), lighter than 90% of aluminum grades. It melts at 557°C (1,035 °F).
EN AC-43300-T6 properties
Typical room-temperature values for EN AC-43300-T6; 38 are specific to this condition. Other listed values are EN AC-43300 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
EN AC-43300-T6 has a density of 2.65 g/cm³ (0.0957 lb/in³), lighter than 90% of aluminum grades. It melts at 557°C (1,035 °F).
Mechanical14
EN AC-43300-T6 has a yield strength of 210 MPa (30.5 ksi) and a tensile strength of 290 MPa (42.1 ksi) — stronger than 56% of aluminum grades. Elongation at break is 4% and the elastic modulus is 73 GPa (10.6 Msi).
Thermal6
EN AC-43300-T6 is rated for continuous service to 150°C (302 °F). It conducts heat at 150 W/m·K (86.7 BTU/hr·ft·°F), better than 58% of aluminum grades. Thermal expansion is 21 µm/m·K (11.7 µin/in·°F).
Electrical3
EN AC-43300-T6 conducts electricity at 39 % IACS, better than 65% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), better than 62% of aluminum grades.
Sustainability4
Producing a kilogram of EN AC-43300-T6 takes about 200 MJ of energy and emits 12.5 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 40%.
Manufacturability8
EN AC-43300-T6's machinability is good (62/100, better than 55% of aluminum grades); weldability very good (75/100); formability poor (15/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with EN AC-43300-T6
Is EN AC-43300 easy to machine?
Machines freely with sharp positive-rake PCD or polished carbide and flood coolant; eutectic silicon abrades HSS quickly, so use high speed, high feed and avoid built-up edge.
Can EN AC-43300 be welded?
Good TIG/MIG weldability with 4043 or 4047 filler; re-age or locally re-heat-treat after welding since the weld HAZ loses T6 strength, and outgassing porosity is a risk on die castings.
Can EN AC-43300 be formed, bent or molded?
Excellent fluidity and low hot-tearing tendency for thin-wall permanent-mould, low-pressure and high-vacuum die casting; keep gas content low (degassing, vacuum) if the part must be solution treated to avoid blistering.
What surface finishes work on EN AC-43300?
Takes protective/hard anodizing, chromate-free conversion coats, e-coat and powder paint well; bright decorative anodize is mottled grey due to Si, and polishing leaves a slightly grey lustre.
EN AC-43300 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 |
|---|---|---|
| Siprimary strengthener, gives fluidity | 9 – 10 | 9.5 |
| MgMg2Si precipitation on ageing | 0.25 – 0.45 | 0.35 |
| Felow-Fe primary-metal grade; limits brittle β-AlFeSi | ≤ 0.19 | 0.12 |
| Cukept low for corrosion resistance | ≤ 0.05 | — |
| Mn | ≤ 0.1 | — |
| Zn | ≤ 0.07 | — |
| Tigrain refinement | 0.08 – 0.15 | 0.12 |
| Others (each) | ≤ 0.03 | — |
| Others (total) | ≤ 0.1 | — |
| Al | balance | — |
EN AC-43300-T6 — frequently asked
What is EN AC-43300-T6 used for?
EN AC-43300-T6 is typically used for chassis components, powertrain housings and structural die castings. In short: balanced strength and ductility; heat-treatable die-casting alloy; automotive chassis standard.
What is the yield strength of EN AC-43300-T6?
EN AC-43300-T6 has a typical yield strength of 210 MPa (30.5 ksi) and a tensile strength of 290 MPa (42.1 ksi) — stronger than 56% of aluminum grades. Strength varies by condition: see the 4 listed tempers.
Is EN AC-43300-T6 easy to machine?
Reasonably — machinability is rated good (62/100, better than 55% of aluminum grades). Machines freely with sharp positive-rake PCD or polished carbide and flood coolant; eutectic silicon abrades HSS quickly, so use high speed, high feed and avoid built-up edge.
Can EN AC-43300-T6 be welded?
Yes — weldability is rated very good (75/100). Good TIG/MIG weldability with 4043 or 4047 filler; re-age or locally re-heat-treat after welding since the weld HAZ loses T6 strength, and outgassing porosity is a risk on die castings.
What surface finishes work on EN AC-43300-T6?
Takes protective/hard anodizing, chromate-free conversion coats, e-coat and powder paint well; bright decorative anodize is mottled grey due to Si, and polishing leaves a slightly grey lustre.
Can EN AC-43300-T6 be formed, bent or molded?
Excellent fluidity and low hot-tearing tendency for thin-wall permanent-mould, low-pressure and high-vacuum die casting; keep gas content low (degassing, vacuum) if the part must be solution treated to avoid blistering.
What is the maximum service temperature of EN AC-43300-T6?
EN AC-43300-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-43300-T6 and EN AC-43300-F?
T6 is the default condition — standard high-strength condition for structural chassis and powertrain castings where peak yield strength and hardness matter more than elongation. F: pick when the part is dimensionally critical or gas-porous (die cast) and moderate strength is enough — no solution-treatment blistering or distortion risk. Yield strength is 210 MPa in T6 versus 95 MPa in 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 — ASM International (1990)
- ASM Handbook Vol. 15 — Casting — ASM International (2008)
- GB/T 1173 (ZL104) — SAC (2013)
- Primary Al-Si9Mg foundry alloy datasheets (Rheinfelden/Trimet/Rio Tinto class) — 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.