Magnesium Alloy EN-MC21110-T4
Temper
EN-MC21110
T4 = solution heat treated and naturally aged
Pick when maximum ductility and impact toughness are required from a sand or permanent-mould casting; not applicable to gas-porous die castings (blistering).
Values for the T4 condition
Other EN-MC21110 tempers and conditions
EN-MC21110 is listed in 4 conditions; see the grade overview at EN-MC21110.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
T4This page Solution heat treated and naturally aged | Pick when maximum ductility and impact toughness are required from a sand or permanent-mould casting; not applicable to gas-porous die castings (blistering). | 90 | 275 | 12 | 55 HB | 10 % IACS |
F | Choose for larger, thick-section sand or gravity-cast parts where die casting is not economical; coarser grain gives lower strength than HPDC. | 97 | 165 | 2.5 | 60 HB | 72 W/m·K |
FDefault As fabricated | Default condition for the overwhelming majority of AZ91 parts: thin-wall HPDC housings, covers and brackets used straight from the die. | 110 | 200 | 3 | 65 HB | 12 % IACS |
Solution heat treated and artificially aged | Use for sand/permanent-mould castings that need the highest yield strength and hardness, accepting low elongation. | 145 | 275 | 3 | 70 HB | 72 W/m·K |
What is EN-MC21110-T4?
EN-MC21110-T4 is EN-MC21110 in the T4 temper — pick when maximum ductility and impact toughness are required from a sand or permanent-mould casting; not applicable to gas-porous die castings (blistering). EN-MC21110-T4 has a yield strength of 90 MPa (13.1 ksi) and a tensile strength of 275 MPa (39.9 ksi) — weaker than 96% of magnesium alloy grades. Elongation at break is 12% and the elastic modulus is 45 GPa (6.53 Msi). EN-MC21110-T4 has a density of 1.81 g/cm³ (0.0654 lb/in³), heavier than 58% of magnesium alloy grades. It melts at 470°C (878 °F). F is the default condition FabDigit quotes; T4 is available on request or by drawing note.
Advantages
- Good corrosion resistance — 32/100, better than 96% of magnesium alloy grades
- Tough — resists crack growth — 17 MPa·√m (15.5 ksi·√in), better than 94% of magnesium alloy grades
Limitations
- Low electrical conductivity — 10 % IACS, worse than 99% of magnesium alloy grades
- Low strength — 90 MPa (13.1 ksi), worse than 96% of magnesium alloy grades
- Poor heat conductor — 66 W/m·K (38.1 BTU/hr·ft·°F), worse than 84% of magnesium alloy grades
- Limited service temperature — 120°C (248 °F), worse than 78% of magnesium alloy grades
EN-MC21110-T4 properties
Typical room-temperature values for EN-MC21110-T4; 41 are specific to this condition. Other listed values are EN-MC21110 reference data and may not represent this condition. Bars are the position among magnesium alloy grades.
Physical3
EN-MC21110-T4 has a density of 1.81 g/cm³ (0.0654 lb/in³), heavier than 58% of magnesium alloy grades. It melts at 470°C (878 °F).
Mechanical14
EN-MC21110-T4 has a yield strength of 90 MPa (13.1 ksi) and a tensile strength of 275 MPa (39.9 ksi) — weaker than 96% of magnesium alloy grades. Elongation at break is 12% and the elastic modulus is 45 GPa (6.53 Msi).
Thermal6
EN-MC21110-T4 is rated for continuous service to 120°C (248 °F). It conducts heat at 66 W/m·K (38.1 BTU/hr·ft·°F), worse than 84% of magnesium alloy grades. Thermal expansion is 26 µm/m·K (14.4 µin/in·°F).
Electrical3
EN-MC21110-T4 conducts electricity at 10 % IACS, worse than 99% of magnesium alloy grades.
Chemical & Environmental3
Corrosion resistance is poor (32/100), better than 96% of magnesium alloy grades.
Sustainability4
Producing a kilogram of EN-MC21110-T4 takes about 305 MJ of energy and emits 33 kg of CO₂ — less than 86% of magnesium alloy grades. Typical recycled content is 30%.
Manufacturability8
EN-MC21110-T4's machinability is excellent (95/100, better than 54% of magnesium alloy grades); weldability very good (70/100); formability poor (25/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with EN-MC21110-T4
Is EN-MC21110 easy to machine?
Cuts faster and with lower power than any other structural metal — use sharp, high-rake carbide tools, high speeds and dry or mineral-oil cutting; never use water-based coolant on fine chips and keep chips/fines controlled against fire.
Can EN-MC21110 be welded?
Sand/permanent-mould castings weld well by GTAW/GMAW with AZ92A or AZ101A filler and preheat for thick sections; HPDC parts usually cannot be fusion welded because entrapped gas causes porosity and blistering.
Can EN-MC21110 be formed, bent or molded?
Excellent hot-chamber and cold-chamber die-casting alloy — long fluid life, low die soldering, thin walls down to ~1 mm; protect the melt with SF6-replacement cover gas and control Fe/Ni/Cu for corrosion performance.
What surface finishes work on EN-MC21110?
Requires chromate-free conversion coating, plasma-electrolytic oxidation or e-coat plus primer/topcoat; isolate steel and aluminium fasteners with sealants or coated inserts to avoid galvanic attack.
EN-MC21110 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 |
|---|---|---|
| Al | 8.3 – 9.7 | 9 |
| Zn | 0.35 – 1 | 0.7 |
| Mn | 0.15 – 0.5 | 0.25 |
| Si | ≤ 0.1 | — |
| Cuhigh-purity (D-type) limit 0.025 | ≤ 0.03 | — |
| Fehigh-purity limit 0.004; critical for corrosion | ≤ 0.01 | — |
| Nihigh-purity limit 0.001 | ≤ 0 | — |
| Others (each) | ≤ 0.01 | — |
| Others (total) | ≤ 0.02 | — |
| Mg | balance | — |
EN-MC21110-T4 — frequently asked
What is EN-MC21110-T4 used for?
EN-MC21110-T4 is typically used for die-cast automotive housings for the EU market, steering column and instrument panel brackets, electronics and camera housings, power tool casings, seat frame and interior structural castings and thin-wall covers and enclosures. In short: EN equivalent of AZ91D; thin-wall die-casting workhorse; lowest-density structural casting metal.
What is the yield strength of EN-MC21110-T4?
EN-MC21110-T4 has a typical yield strength of 90 MPa (13.1 ksi) and a tensile strength of 275 MPa (39.9 ksi) — weaker than 96% of magnesium alloy grades. Strength varies by condition: see the 4 listed tempers.
Is EN-MC21110-T4 easy to machine?
Yes — machinability is rated excellent (95/100, better than 54% of magnesium alloy grades). Cuts faster and with lower power than any other structural metal — use sharp, high-rake carbide tools, high speeds and dry or mineral-oil cutting; never use water-based coolant on fine chips and keep chips/fines controlled against fire.
Can EN-MC21110-T4 be welded?
Yes — weldability is rated very good (70/100). Sand/permanent-mould castings weld well by GTAW/GMAW with AZ92A or AZ101A filler and preheat for thick sections; HPDC parts usually cannot be fusion welded because entrapped gas causes porosity and blistering.
What surface finishes work on EN-MC21110-T4?
Requires chromate-free conversion coating, plasma-electrolytic oxidation or e-coat plus primer/topcoat; isolate steel and aluminium fasteners with sealants or coated inserts to avoid galvanic attack.
Can EN-MC21110-T4 be formed, bent or molded?
Excellent hot-chamber and cold-chamber die-casting alloy — long fluid life, low die soldering, thin walls down to ~1 mm; protect the melt with SF6-replacement cover gas and control Fe/Ni/Cu for corrosion performance.
What is the maximum service temperature of EN-MC21110-T4?
EN-MC21110-T4 is rated for continuous use to about 120°C (248 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between EN-MC21110-F and EN-MC21110-T6?
F is the default condition — default condition for the overwhelming majority of AZ91 parts: thin-wall HPDC housings, covers and brackets used straight from the die. T6: use for sand/permanent-mould castings that need the highest yield strength and hardness, accepting low elongation. Yield strength is 110 MPa in F versus 145 MPa in T6.
Sources
- EN 1753 — Magnesium and magnesium alloys: magnesium alloy ingots and castings — CEN (2019)
- ASTM B94 — Standard Specification for Magnesium-Alloy Die Castings — ASTM International (2018)
- ASTM B80 — Magnesium-Alloy Sand Castings — ASTM International (2015)
- ASM Specialty Handbook: Magnesium and Magnesium Alloys — ASM International (1999)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
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.