Aluminum EN AC-21200
EN AC-21200
EN AC-21200 (AlCu4MnMg) is an Al-Cu casting alloy with manganese and magnesium additions, used in T4, T6 or T7 for 210 MPa yield, 320 MPa tensile, 7% elongation and 95 HB.
Reference datasheet — EN AC-21200 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the T4 condition
EN AC-21200 tempers and conditions
EN AC-21200 is supplied in 4 conditions, soft to hard. T4 is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As fabricated | Rarely used shipping condition: as-cast strength is low and unstable; normally an intermediate state before solution treatment. | 110 | 190 | 5 | 60 HB | 38 % IACS |
T4Default Solution heat treated and naturally aged | Standard supply condition: highest ductility and fracture toughness at high strength — choose for aerospace/structural castings that see impact or damage-tolerance requirements. | 210 | 320 | 7 | 95 HB | 31 % IACS |
Solution heat treated and overaged (stabilized) | Overaged temper: slightly below peak strength but dimensionally stable and markedly less sensitive to intergranular/stress-corrosion attack — the choice for machined precision and long-life aerospace castings. | 260 | 330 | 4 | 105 HB | 38 % IACS |
Solution heat treated and artificially aged | Peak-aged condition for maximum yield strength and hardness where ductility and stress-corrosion resistance are less critical. | 320 | 390 | 4 | 125 HB | 35 % IACS |
What is EN AC-21200?
EN AC-21200 (AlCu4MnMg) is an Al-Cu casting alloy with manganese and magnesium additions, used in T4, T6 or T7 for 210 MPa yield, 320 MPa tensile, 7% elongation and 95 HB. It suits aerospace and precision-engineering sand and permanent-mould castings that are largely machined after ageing, with a machinability score of 75. The copper content limits corrosion resistance (score 38) and fusion weldability (25), and service temperature is about 150 °C. EN AC-21100 machines slightly better; EN AC-42100 is the choice when castability and corrosion resistance are decisive. EN AC-21200 has a density of 2.81 g/cm³ (0.102 lb/in³), heavier than 86% of aluminum grades. It melts at 545°C (1,013 °F). EN AC-21200 has a yield strength of 210 MPa (30.5 ksi) and a tensile strength of 320 MPa (46.4 ksi) — stronger than 56% of aluminum grades. Elongation at break is 7% and the elastic modulus is 72 GPa (10.4 Msi).
What is EN AC-21200 used for?
- aerospace structural parts
- precision machined castings
- engine brackets
Advantages
- Easy to machine — 75/100, better than 86% of aluminum grades
Limitations
- Needs corrosion protection — 38/100, worse than 79% of aluminum grades
- Difficult to weld — 25/100, worse than 76% of aluminum grades
EN AC-21200 properties
Typical room-temperature values for EN AC-21200-T4; bars are the position among aluminum grades.
Physical3
EN AC-21200 has a density of 2.81 g/cm³ (0.102 lb/in³), heavier than 86% of aluminum grades. It melts at 545°C (1,013 °F).
Mechanical12
EN AC-21200 has a yield strength of 210 MPa (30.5 ksi) and a tensile strength of 320 MPa (46.4 ksi) — stronger than 56% of aluminum grades. Elongation at break is 7% and the elastic modulus is 72 GPa (10.4 Msi).
Thermal6
EN AC-21200 is rated for continuous service to 150°C (302 °F). It conducts heat at 130 W/m·K (75.1 BTU/hr·ft·°F), worse than 65% of aluminum grades. Thermal expansion is 22.5 µm/m·K (12.5 µin/in·°F).
Electrical3
EN AC-21200 conducts electricity at 31 % IACS, worse than 68% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is fair (38/100), worse than 79% of aluminum grades.
Sustainability4
Producing a kilogram of EN AC-21200 takes about 200 MJ of energy and emits 12.5 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 25%.
Manufacturability8
EN AC-21200's machinability is very good (75/100, better than 86% of aluminum grades); weldability poor (25/100); formability poor (15/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the aluminum family
Yield strength against density for every aluminum grade FabDigit runs. EN AC-21200 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with EN AC-21200
Is EN AC-21200 easy to machine?
Machines very well in T4/T7 with sharp carbide tooling, high speeds and flood coolant; chips are short and surface finish is excellent.
Can EN AC-21200 be welded?
Poor fusion weldability — high hot-tearing risk; repair welding only with 2319/4145-type filler under qualified procedure followed by re-solution treatment.
Can EN AC-21200 be formed, bent or molded?
Difficult casting alloy: long freezing range, hot tearing and shrink porosity demand chills, generous risers, clean low-Fe charge and tight solution treatment (~525–530 °C) with rapid quench.
EN AC-21200 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 |
|---|---|---|
| Cuprincipal strengthening element | 4.2 – 5 | 4.6 |
| Mn | 0.2 – 0.5 | 0.35 |
| Mgboosts age-hardening response | 0.15 – 0.35 | 0.25 |
| Tigrain refinement | 0.15 – 0.3 | 0.22 |
| Siimpurity limit | ≤ 0.15 | |
| Fekept low for toughness | ≤ 0.15 | |
| Znimpurity limit | ≤ 0.1 | |
| Niimpurity limit | ≤ 0.05 | |
| Others (each)total ≤ 0.15 | ≤ 0.05 | |
| Al | balance |
What surface finishes work on EN AC-21200?
Chromate/chemical conversion coating plus primer is standard; sulfuric or chromic anodize is possible but films are darker and less protective than on Al-Si-Mg alloys.
Surface treatments FabDigit runs on aluminum parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Equivalent designations
Standards and trade names that resolve to Aluminum EN AC-21200 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- AC-21200AlCu4MnMg
How much does EN AC-21200 cost?
EN AC-21200 is a premium-cost aluminum ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
EN AC-21200 — frequently asked
What is EN AC-21200 used for?
EN AC-21200 is typically used for aerospace structural parts, precision machined castings and engine brackets. In short: heat-treatable Al-Cu casting alloy; machines cleanly in T4/T7; low weldability.
What is the yield strength of EN AC-21200?
EN AC-21200 has a typical yield strength of 210 MPa (30.5 ksi) and a tensile strength of 320 MPa (46.4 ksi) — stronger than 56% of aluminum grades. Strength varies by condition: see the 4 listed tempers.
Is EN AC-21200 easy to machine?
Yes — machinability is rated very good (75/100, better than 86% of aluminum grades). Machines very well in T4/T7 with sharp carbide tooling, high speeds and flood coolant; chips are short and surface finish is excellent.
Can EN AC-21200 be welded?
Not readily — weldability is rated poor (25/100). Poor fusion weldability — high hot-tearing risk; repair welding only with 2319/4145-type filler under qualified procedure followed by re-solution treatment.
What surface finishes work on EN AC-21200?
Chromate/chemical conversion coating plus primer is standard; sulfuric or chromic anodize is possible but films are darker and less protective than on Al-Si-Mg alloys.
Can EN AC-21200 be formed, bent or molded?
Difficult casting alloy: long freezing range, hot tearing and shrink porosity demand chills, generous risers, clean low-Fe charge and tight solution treatment (~525–530 °C) with rapid quench.
What is the maximum service temperature of EN AC-21200?
EN AC-21200 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-21200-T4 and EN AC-21200-T6?
T4 is the default condition — standard supply condition: highest ductility and fracture toughness at high strength — choose for aerospace/structural castings that see impact or damage-tolerance requirements. T6: peak-aged condition for maximum yield strength and hardness where ductility and stress-corrosion resistance are less critical. Yield strength is 210 MPa in T4 versus 320 MPa in T6.
How much does EN AC-21200 cost?
EN AC-21200 is a premium-cost aluminum ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- EN 1706 — Aluminium and aluminium alloys: castings, chemical composition and mechanical properties — CEN (2020)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys (206.0/A206.0 data) — ASM International (1990)
- ASM Specialty Handbook: Aluminum and Aluminum Alloys — ASM International (1993)
- ASTM B26/B26M — Aluminum-Alloy Sand Castings — ASTM (2018)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.