Aluminum EN AC-51200-T4
Temper
EN AC-51200
T4 = solution heat treated and naturally aged
Pick when maximum strength plus very high ductility/toughness and best corrosion resistance are needed (equivalent to 520.0-T4 / ZL301-T4); long ~18–24 h solution soak near 430 °C is required.
Values for the T4 condition
Other EN AC-51200 tempers and conditions
EN AC-51200 is listed in 2 conditions; see the grade overview at EN AC-51200.
- F
- T4
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
FDefault As fabricated | Standard EN 1706 delivery condition for AlMg9 chill castings — good corrosion resistance and machinability with no heat treatment. | 150 | 230 | 2 | 70 HB | 21 % IACS |
T4This page Solution heat treated and naturally aged | Pick when maximum strength plus very high ductility/toughness and best corrosion resistance are needed (equivalent to 520.0-T4 / ZL301-T4); long ~18–24 h solution soak near 430 °C is required. | 175 | 310 | 12 | 75 HB | 21 % IACS |
What is EN AC-51200-T4?
EN AC-51200-T4 is EN AC-51200 in the T4 temper — pick when maximum strength plus very high ductility/toughness and best corrosion resistance are needed (equivalent to 520.0-T4 / ZL301-T4); long ~18–24 h solution soak near 430 °C is required. EN AC-51200-T4 has a yield strength of 175 MPa (25.4 ksi) and a tensile strength of 310 MPa (45 ksi) — weaker than 55% of aluminum grades. Elongation at break is 12% and the elastic modulus is 68 GPa (9.86 Msi). EN AC-51200-T4 has a density of 2.6 g/cm³ (0.0939 lb/in³), lighter than 97% of aluminum grades. It melts at 450°C (842 °F). F is the default condition FabDigit quotes; T4 is available on request or by drawing note.
Advantages
- Good corrosion resistance — 82/100, better than 99% of aluminum grades
- Polishes to a fine finish — 80/100, better than 93% of aluminum grades
- Easy to machine — 80/100, better than 92% of aluminum grades
Limitations
- Poor heat conductor — 87 W/m·K (50.3 BTU/hr·ft·°F), worse than 100% of aluminum grades
- Low electrical conductivity — 21 % IACS, worse than 99% of aluminum grades
- Limited service temperature — 80°C (176 °F), worse than 94% of aluminum grades
EN AC-51200-T4 properties
Typical room-temperature values for EN AC-51200-T4; 12 are specific to this condition. Other listed values are EN AC-51200 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
EN AC-51200-T4 has a density of 2.6 g/cm³ (0.0939 lb/in³), lighter than 97% of aluminum grades. It melts at 450°C (842 °F).
Mechanical10
EN AC-51200-T4 has a yield strength of 175 MPa (25.4 ksi) and a tensile strength of 310 MPa (45 ksi) — weaker than 55% of aluminum grades. Elongation at break is 12% and the elastic modulus is 68 GPa (9.86 Msi).
Thermal6
EN AC-51200-T4 is rated for continuous service to 80°C (176 °F). It conducts heat at 87 W/m·K (50.3 BTU/hr·ft·°F), worse than 100% of aluminum grades. Thermal expansion is 25 µm/m·K (13.9 µin/in·°F).
Electrical3
EN AC-51200-T4 conducts electricity at 21 % IACS, worse than 99% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (82/100), better than 99% of aluminum grades.
Sustainability4
Producing a kilogram of EN AC-51200-T4 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-51200-T4's machinability is very good (80/100, better than 92% of aluminum grades); weldability good (55/100); formability poor (20/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with EN AC-51200-T4
Is EN AC-51200 easy to machine?
Machines very freely with sharp high-rake carbide/PCD tools and generous coolant; gives short chips and an excellent finish, better than Al-Si castings.
Can EN AC-51200 be welded?
TIG/MIG weldable with 5356 or matching Al-Mg filler under strict oxide removal and low heat input; avoid preheat/soaking that sensitizes grain boundaries.
Can EN AC-51200 be formed, bent or molded?
Difficult to cast: melt oxidizes and picks up hydrogen readily, requiring protective flux/cover gas, Be-free modern melt protection, chilled feeding and generous risers to control hot tearing and shrinkage.
What surface finishes work on EN AC-51200?
Excellent bright/clear anodizing and polishing response; chromate-free conversion coats and paints adhere well — plating is rarely used.
EN AC-51200 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 |
|---|---|---|
| Mgprincipal alloying element | 8 – 10.5 | 9 |
| Siimpurity limit per EN 1706; kept <0.3 in 520.0/ZL301 | ≤ 2.5 | — |
| Fe | ≤ 0.55 | — |
| Cu | ≤ 0.1 | — |
| Mn | ≤ 0.55 | — |
| Zn | ≤ 0.25 | — |
| Tigrain refiner | ≤ 0.2 | — |
| Others (each) | ≤ 0.05 | — |
| Others (total) | ≤ 0.15 | — |
| Al | balance | — |
EN AC-51200-T4 — frequently asked
What is EN AC-51200-T4 used for?
EN AC-51200-T4 is typically used for marine hardware, aerospace fittings and decorative/architectural castings. In short: strongest Al-Mg casting alloy; excellent seawater resistance; demanding foundry practice.
What is the yield strength of EN AC-51200-T4?
EN AC-51200-T4 has a typical yield strength of 175 MPa (25.4 ksi) and a tensile strength of 310 MPa (45 ksi) — weaker than 55% of aluminum grades. Strength varies by condition: see the 2 listed tempers.
Is EN AC-51200-T4 easy to machine?
Yes — machinability is rated very good (80/100, better than 92% of aluminum grades). Machines very freely with sharp high-rake carbide/PCD tools and generous coolant; gives short chips and an excellent finish, better than Al-Si castings.
Can EN AC-51200-T4 be welded?
Yes — weldability is rated good (55/100). TIG/MIG weldable with 5356 or matching Al-Mg filler under strict oxide removal and low heat input; avoid preheat/soaking that sensitizes grain boundaries.
What surface finishes work on EN AC-51200-T4?
Excellent bright/clear anodizing and polishing response; chromate-free conversion coats and paints adhere well — plating is rarely used.
Can EN AC-51200-T4 be formed, bent or molded?
Difficult to cast: melt oxidizes and picks up hydrogen readily, requiring protective flux/cover gas, Be-free modern melt protection, chilled feeding and generous risers to control hot tearing and shrinkage.
What is the maximum service temperature of EN AC-51200-T4?
EN AC-51200-T4 is rated for continuous use to about 80°C (176 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between EN AC-51200-F and EN AC-51200-T4?
F is the default condition — standard EN 1706 delivery condition for AlMg9 chill castings — good corrosion resistance and machinability with no heat treatment. T4: pick when maximum strength plus very high ductility/toughness and best corrosion resistance are needed (equivalent to 520.0-T4 / ZL301-T4); long ~18–24 h solution soak near 430 °C is required. Yield strength is 150 MPa in F versus 175 MPa in T4.
Sources
- EN 1706 — Aluminium and aluminium alloys: castings, chemical composition and mechanical properties — CEN (2020)
- GB/T 1173 (ZL301 / ZAlMg10) — SAC (2013)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys (520.0) — ASM International (1990)
- ASM Handbook Vol.15 — Casting — ASM International (2008)
- Aluminum Association Pink 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.