Aluminum EN AC-42200-T6
Temper · default condition
EN AC-42200
T6 = solution heat treated and artificially aged
Default condition: maximum strength and hardness for load-bearing structural castings where moderate ductility is acceptable.
Values for the T6 condition
Other EN AC-42200 tempers and conditions
EN AC-42200 is listed in 5 conditions; see the grade overview at EN AC-42200.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As fabricated | As-cast condition, used only for non-structural parts or as the pre-heat-treat delivery state. | 90 | 180 | 5 | 55 HB | 41 % IACS |
Cooled from hot working and artificially aged | Low-distortion, low-cost partial strengthening without solution treatment; used mainly on thin permanent-mould/low-pressure castings. | 150 | 210 | 4 | 70 HB | 41 % IACS |
Solution heat treated and under-aged for high ductility | Choose when elongation, impact tolerance and damage tolerance matter more than peak yield strength (e.g. crash/suspension castings). | 225 | 300 | 8 | 90 HB | 42 % IACS |
T6DefaultThis page Solution heat treated and artificially aged | Default condition: maximum strength and hardness for load-bearing structural castings where moderate ductility is acceptable. | 250 | 320 | 4 | 105 HB | 39 % IACS |
T6 variant, underaged | Aerospace premium-casting practice (A357-T61): near-peak strength with better guaranteed elongation than plain T6. | 285 | 345 | 5 | 105 HB | 39 % IACS |
What is EN AC-42200-T6?
EN AC-42200-T6 is EN AC-42200 in the T6 temper — default condition: maximum strength and hardness for load-bearing structural castings where moderate ductility is acceptable. EN AC-42200-T6 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 320 MPa (46.4 ksi) — stronger than 65% of aluminum grades. Elongation at break is 4% and the elastic modulus is 72 GPa (10.4 Msi). EN AC-42200-T6 has a density of 2.67 g/cm³ (0.0965 lb/in³), lighter than 78% of aluminum grades. It melts at 557°C (1,035 °F).
Advantages
- Low embodied carbon — 9.5 kg CO₂/kg, better than 97% of aluminum grades
EN AC-42200-T6 properties
Typical room-temperature values for EN AC-42200-T6; 40 are specific to this condition. Other listed values are EN AC-42200 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
EN AC-42200-T6 has a density of 2.67 g/cm³ (0.0965 lb/in³), lighter than 78% of aluminum grades. It melts at 557°C (1,035 °F).
Mechanical14
EN AC-42200-T6 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 320 MPa (46.4 ksi) — stronger than 65% of aluminum grades. Elongation at break is 4% and the elastic modulus is 72 GPa (10.4 Msi).
Thermal6
EN AC-42200-T6 is rated for continuous service to 150°C (302 °F). It conducts heat at 151 W/m·K (87.2 BTU/hr·ft·°F), better than 63% of aluminum grades. Thermal expansion is 21.5 µm/m·K (11.9 µin/in·°F).
Electrical3
EN AC-42200-T6 conducts electricity at 39 % IACS, better than 65% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (58/100), better than 57% of aluminum grades.
Sustainability4
Producing a kilogram of EN AC-42200-T6 takes about 155 MJ of energy and emits 9.5 kg of CO₂ — less than 94% of aluminum grades. Typical recycled content is 35%.
Manufacturability8
EN AC-42200-T6's machinability is good (55/100, worse than 59% of aluminum grades); weldability very good (70/100); 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-42200-T6
Is EN AC-42200 easy to machine?
Machines well with sharp PCD or polished carbide tooling and high speeds; free-machining is limited by abrasive eutectic Si and by gumminess in the F/T5 states, so prefer T6/T64 for good finish.
Can EN AC-42200 be welded?
Readily TIG/MIG welded with 4043/4047 (or 5356 where colour match after anodize matters); re-solution + age locally or fully to restore T6 strength across the weld.
Can EN AC-42200 be formed, bent or molded?
Excellent fluidity for sand, permanent-mould, low-pressure and investment casting; needs Sr/Na modification, good directional solidification and low Fe to reach full elongation.
What surface finishes work on EN AC-42200?
Hard/chromic anodize for wear and corrosion protection (grey tone from Si), chemical conversion coat plus primer for paint; polishing and bright decorative anodize are limited by silicon particles.
EN AC-42200 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 | 6.5 – 7.5 | 7 |
| Mghigher-Mg version vs EN AC-42100 (AlSi7Mg0.3) | 0.45 – 0.7 | 0.6 |
| Tigrain refinement | 0.08 – 0.25 | 0.15 |
| Fe0.15 max typical for investment/premium castings | ≤ 0.19 | — |
| Cu | ≤ 0.05 | — |
| Mn | ≤ 0.1 | — |
| Zn | ≤ 0.07 | — |
| Others (each)total 0.10 max | ≤ 0.03 | — |
| Al | balance | — |
EN AC-42200-T6 — frequently asked
What is EN AC-42200-T6 used for?
EN AC-42200-T6 is typically used for aerospace structural parts, high-strength automotive castings and wheels. In short: highest-strength AlSi7Mg grade; A357.0 aerospace equivalent; T6 structural castings.
What is the yield strength of EN AC-42200-T6?
EN AC-42200-T6 has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 320 MPa (46.4 ksi) — stronger than 65% of aluminum grades. Strength varies by condition: see the 5 listed tempers.
Is EN AC-42200-T6 easy to machine?
Reasonably — machinability is rated good (55/100, worse than 59% of aluminum grades). Machines well with sharp PCD or polished carbide tooling and high speeds; free-machining is limited by abrasive eutectic Si and by gumminess in the F/T5 states, so prefer T6/T64 for good finish.
Can EN AC-42200-T6 be welded?
Yes — weldability is rated very good (70/100). Readily TIG/MIG welded with 4043/4047 (or 5356 where colour match after anodize matters); re-solution + age locally or fully to restore T6 strength across the weld.
What surface finishes work on EN AC-42200-T6?
Hard/chromic anodize for wear and corrosion protection (grey tone from Si), chemical conversion coat plus primer for paint; polishing and bright decorative anodize are limited by silicon particles.
Can EN AC-42200-T6 be formed, bent or molded?
Excellent fluidity for sand, permanent-mould, low-pressure and investment casting; needs Sr/Na modification, good directional solidification and low Fe to reach full elongation.
What is the maximum service temperature of EN AC-42200-T6?
EN AC-42200-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-42200-T6 and EN AC-42200-F?
T6 is the default condition — default condition: maximum strength and hardness for load-bearing structural castings where moderate ductility is acceptable. F: as-cast condition, used only for non-structural parts or as the pre-heat-treat delivery state. Yield strength is 250 MPa in T6 versus 90 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 (A357.0 data) — ASM International (1990)
- ASM Specialty Handbook: Aluminum and Aluminum Alloys — ASM International (1993)
- AMS 4241 / AMS 4289 — A357.0 premium quality aluminium alloy castings — SAE International (2018)
- JIS H5202 — Aluminium alloy castings (AC4CH) — JSA (2010)
- Aluminum Association Teal Sheets — designations and chemical composition limits for aluminum alloys in the form of castings and ingot — The Aluminum Association (2018)
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.