Aluminum EN AC-48100-T7
Temper
EN AC-48100
T7 = solution heat treated and overaged (stabilized)
Choose for maximum dimensional and thermal stability in hot-running parts, trading some strength for stability against growth in service.
Values for the T7 condition
Other EN AC-48100 tempers and conditions
EN AC-48100 is listed in 4 conditions; see the grade overview at EN AC-48100.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
FDefault As fabricated | Default supply condition for chill/permanent-mould and high-pressure die castings where wear resistance and low CTE matter more than strength. | 180 | 190 | 0.8 | 105 HB | 27 % IACS |
Cooled from hot working and artificially aged | Pick when a modest strength/hardness gain and better dimensional stability are wanted without the distortion risk and cost of a full solution treatment. | 195 | 210 | 0.7 | 115 HB | 27 % IACS |
T7This page Solution heat treated and overaged (stabilized) | Choose for maximum dimensional and thermal stability in hot-running parts, trading some strength for stability against growth in service. | 250 | 260 | 1 | 120 HB | 30 % IACS |
Solution heat treated and artificially aged | Highest strength and hardness condition — use for wear parts that also carry significant mechanical load, accepting near-zero ductility. | 300 | 310 | 0.8 | 145 HB | 25 % IACS |
What is EN AC-48100-T7?
EN AC-48100-T7 is EN AC-48100 in the T7 temper — choose for maximum dimensional and thermal stability in hot-running parts, trading some strength for stability against growth in service. EN AC-48100-T7 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 260 MPa (37.7 ksi) — stronger than 65% of aluminum grades. Elongation at break is 1% and the elastic modulus is 81 GPa (11.7 Msi). EN AC-48100-T7 has a density of 2.73 g/cm³ (0.0986 lb/in³), heavier than 61% of aluminum grades. It melts at 507°C (945 °F). F is the default condition FabDigit quotes; T7 is available on request or by drawing note.
Advantages
- Low embodied carbon — 4 kg CO₂/kg, better than 100% of aluminum grades
- High service temperature — 250°C (482 °F), better than 97% of aluminum grades
- Stiff — 81 GPa (11.7 Msi), better than 96% of aluminum grades
Limitations
- Limited ductility — 1%, worse than 95% of aluminum grades
- Low fracture toughness — 16 MPa·√m (14.6 ksi·√in), worse than 89% of aluminum grades
- Limited formability — 6/100, worse than 89% of aluminum grades
- Difficult to machine — 36/100, worse than 84% of aluminum grades
- Hard to polish — 45/100, worse than 76% of aluminum grades
EN AC-48100-T7 properties
Typical room-temperature values for EN AC-48100-T7; 22 are specific to this condition. Other listed values are EN AC-48100 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
EN AC-48100-T7 has a density of 2.73 g/cm³ (0.0986 lb/in³), heavier than 61% of aluminum grades. It melts at 507°C (945 °F).
Mechanical13
EN AC-48100-T7 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 260 MPa (37.7 ksi) — stronger than 65% of aluminum grades. Elongation at break is 1% and the elastic modulus is 81 GPa (11.7 Msi).
Thermal6
EN AC-48100-T7 is rated for continuous service to 250°C (482 °F). It conducts heat at 145 W/m·K (83.8 BTU/hr·ft·°F), better than 53% of aluminum grades. Thermal expansion is 18 µm/m·K (10 µin/in·°F).
Electrical3
EN AC-48100-T7 conducts electricity at 30 % IACS, worse than 73% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is fair (44/100), worse than 65% of aluminum grades.
Sustainability4
Producing a kilogram of EN AC-48100-T7 takes about 55 MJ of energy and emits 4 kg of CO₂ — less than 100% of aluminum grades. Typical recycled content is 70%.
Manufacturability8
EN AC-48100-T7's machinability is fair (36/100, worse than 84% of aluminum grades); weldability poor (28/100); formability not recommended (6/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with EN AC-48100-T7
Is EN AC-48100 easy to machine?
Use PCD or CBN tooling with high speed, light feed and flood coolant — primary Si destroys carbide edges quickly; honed bores can be exposed to give a hard Si running surface.
Can EN AC-48100 be welded?
Poor: high Si plus 4–5 % Cu makes it hot-crack and porosity prone; repair only with Al-Si (4047/4145) filler and preheat, avoid structural welds.
Can EN AC-48100 be formed, bent or molded?
Casting-only alloy — pour hot (≈730–800 °C) with phosphorus modification and controlled cooling to keep primary Si fine and evenly distributed; suitable for HPDC, permanent mould and squeeze casting.
What surface finishes work on EN AC-48100?
Anodizing gives dark, uneven films (hard anodize acceptable for wear duty); prefer as-machined, honed, phosphate/paint or electroless-Ni for corrosion protection.
EN AC-48100 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 Si particles give the wear resistance; P-modified for fine primary Si | 16 – 18 | 17 |
| Cu | 4 – 5 | 4.5 |
| Mg | 0.45 – 0.65 | 0.55 |
| Fe≤0.5 for sand/permanent-mould quality (A390.0); up to 1.3 for die-cast (B390) | ≤ 1.3 | — |
| Mn | ≤ 0.5 | — |
| Ni | ≤ 0.3 | — |
| Zn | ≤ 0.2 | — |
| Ti | ≤ 0.2 | — |
| others (each)total ≤0.15 | ≤ 0.05 | — |
| Al | balance | — |
EN AC-48100-T7 — frequently asked
What is EN AC-48100-T7 used for?
EN AC-48100-T7 is typically used for cylinder liners, compressor pistons and wear-resistant parts. In short: highest wear resistance, cast Al; hypereutectic, low expansion; requires PCD tooling.
What is the yield strength of EN AC-48100-T7?
EN AC-48100-T7 has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 260 MPa (37.7 ksi) — stronger than 65% of aluminum grades. Strength varies by condition: see the 4 listed tempers.
Is EN AC-48100-T7 easy to machine?
Not especially — machinability is rated fair (36/100, worse than 84% of aluminum grades). Use PCD or CBN tooling with high speed, light feed and flood coolant — primary Si destroys carbide edges quickly; honed bores can be exposed to give a hard Si running surface.
Can EN AC-48100-T7 be welded?
Not readily — weldability is rated poor (28/100). Poor: high Si plus 4–5 % Cu makes it hot-crack and porosity prone; repair only with Al-Si (4047/4145) filler and preheat, avoid structural welds.
What surface finishes work on EN AC-48100-T7?
Anodizing gives dark, uneven films (hard anodize acceptable for wear duty); prefer as-machined, honed, phosphate/paint or electroless-Ni for corrosion protection.
Can EN AC-48100-T7 be formed, bent or molded?
Casting-only alloy — pour hot (≈730–800 °C) with phosphorus modification and controlled cooling to keep primary Si fine and evenly distributed; suitable for HPDC, permanent mould and squeeze casting.
What is the maximum service temperature of EN AC-48100-T7?
EN AC-48100-T7 is rated for continuous use to about 250°C (482 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between EN AC-48100-F and EN AC-48100-T6?
F is the default condition — default supply condition for chill/permanent-mould and high-pressure die castings where wear resistance and low CTE matter more than strength. T6: highest strength and hardness condition — use for wear parts that also carry significant mechanical load, accepting near-zero ductility. Yield strength is 180 MPa in F versus 300 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 (A390.0 data) — ASM International (1990)
- ASTM B108 / B85 — Aluminum-alloy permanent mold and die castings — ASTM (2019)
- JIS H5202 (AC9A) and GB/T 1173 cast aluminium alloys — JISC / SAC (2013)
- Aluminum Association designations and typical properties for hypereutectic Al-Si casting alloys — The Aluminum Association (2015)
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.