Aluminum ZL207
GB ZL207
ZL207 (ZAlCu5Ni1Co1Mn1, close to 242.0) is an Al-Cu casting alloy with nickel, cobalt and manganese additions that retain strength at temperature, supplied F, T1 or T1(J).
Reference datasheet — ZL207 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 T1 condition
ZL207 tempers and conditions
ZL207 is supplied in 3 conditions, soft to hard. T1 is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As fabricated | Use only for non-critical or dimensionally sensitive parts; strength and heat stability are below the aged condition. | 120 | 155 | 2 | 70 HB | 30 % IACS |
T1Default Cooled from hot working and naturally aged | Standard supply condition for ZL207 sand castings — direct artificial aging develops the RE/Cu dispersoid strengthening for 300–350 °C service. | 150 | 185 | 1.5 | 80 HB | 32 % IACS |
T1 | Choose for thinner-wall, higher-integrity castings — the faster solidification of the metal mould raises strength above the sand-cast T1 level. | 165 | 200 | 2 | 85 HB | 32 % IACS |
What is ZL207?
ZL207 (ZAlCu5Ni1Co1Mn1, close to 242.0) is an Al-Cu casting alloy with nickel, cobalt and manganese additions that retain strength at temperature, supplied F, T1 or T1(J). It is used for engine and turbine castings operating to 350 °C, the highest service limit in this ZL group; default values are 185 MPa tensile, 150 MPa yield, 1.5 % elongation, 80 HB, 130 W/m·K and 32 % IACS. Ductility and corrosion resistance are low (corrosion score 33), and the Cu-rich, wide-freezing-range composition is hot-crack sensitive and effectively not repair-weldable. Use ZL110 where 200 °C service is sufficient. ZL207 has a density of 2.85 g/cm³ (0.103 lb/in³), heavier than 96% of aluminum grades. It melts at 545°C (1,013 °F). ZL207 has a yield strength of 150 MPa (21.8 ksi) and a tensile strength of 185 MPa (26.8 ksi) — weaker than 65% of aluminum grades. Elongation at break is 1.5% and the elastic modulus is 70 GPa (10.2 Msi).
What is ZL207 used for?
- High-temperature engine castings
- Turbine housings
- Air-cooled cylinder heads
- Pistons and piston crowns
- Exhaust-side brackets and adapters
- Hot-running pump housings
Advantages
- High service temperature — 350°C (662 °F), better than 100% of aluminum grades
Limitations
- Limited formability — 5/100, worse than 94% of aluminum grades
- Limited ductility — 1.5%, worse than 91% of aluminum grades
- Needs corrosion protection — 33/100, worse than 91% of aluminum grades
- Hard to polish — 40/100, worse than 91% of aluminum grades
- Difficult to weld — 25/100, worse than 76% of aluminum grades
ZL207 properties
Typical room-temperature values for ZL207-T1; bars are the position among aluminum grades.
Physical3
ZL207 has a density of 2.85 g/cm³ (0.103 lb/in³), heavier than 96% of aluminum grades. It melts at 545°C (1,013 °F).
Mechanical10
ZL207 has a yield strength of 150 MPa (21.8 ksi) and a tensile strength of 185 MPa (26.8 ksi) — weaker than 65% of aluminum grades. Elongation at break is 1.5% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
ZL207 is rated for continuous service to 350°C (662 °F). It conducts heat at 130 W/m·K (75.1 BTU/hr·ft·°F), worse than 65% of aluminum grades. Thermal expansion is 21 µm/m·K (11.7 µin/in·°F).
Electrical3
ZL207 conducts electricity at 32 % IACS, worse than 63% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is poor (33/100), worse than 91% of aluminum grades.
Sustainability4
Producing a kilogram of ZL207 takes about 200 MJ of energy and emits 13 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 15%.
Manufacturability8
ZL207's machinability is good (62/100, better than 55% of aluminum grades); weldability poor (25/100); formability not recommended (5/100).
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. ZL207 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with ZL207
Is ZL207 easy to machine?
Machines easily with sharp carbide tooling and high speeds, but hard RE/Cu intermetallics accelerate edge wear and porosity can be exposed on finish cuts.
Can ZL207 be welded?
Poor fusion weldability — Cu-rich, wide-freezing-range alloy is highly hot-crack sensitive; repair only by TIG with Al-Cu filler and immediate re-aging, otherwise use mechanical joints.
Can ZL207 be formed, bent or molded?
Casting alloy only: use generous fillets, directional solidification and chills to counter hot tearing; pour ~700–730 °C with degassing and RE-safe fluxing, no cold forming.
ZL207 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 |
|---|---|---|
| mischmetal, mainly Ce-rich | 4.4 – 5 | 4.7 |
| Cu | 3 – 3.4 | 3.2 |
| Si | 1.6 – 2 | 1.8 |
| Mn | 0.9 – 1.2 | 1.05 |
| Ni | 0.2 – 0.3 | 0.25 |
| Zr | 0.15 – 0.25 | 0.2 |
| Mg | 0.15 – 0.25 | 0.2 |
| Tigrain refiner | 0.05 – 0.2 | 0.12 |
| Feimpurity limit, sand cast | ≤ 0.6 | |
| Al | balance |
What surface finishes work on ZL207?
Best protected by hard anodizing, chromate-free conversion coating or heat-resistant paint; decorative anodizing gives dark, blotchy films because of Cu and RE phases.
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 ZL207 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- GB (China)
- ZAlCu5Ni1Co1Mn1
- Similar grades
- 242.0
How much does ZL207 cost?
ZL207 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.
ZL207 — frequently asked
What is ZL207 used for?
ZL207 is typically used for high-temperature engine castings, turbine housings, air-cooled cylinder heads, pistons and piston crowns, exhaust-side brackets and adapters and hot-running pump housings. In short: highest-temperature ZL alloy; 350 °C service capability; not practically weldable.
What is the yield strength of ZL207?
ZL207 has a typical yield strength of 150 MPa (21.8 ksi) and a tensile strength of 185 MPa (26.8 ksi) — weaker than 65% of aluminum grades. Strength varies by condition: see the 3 listed tempers.
Is ZL207 easy to machine?
Reasonably — machinability is rated good (62/100, better than 55% of aluminum grades). Machines easily with sharp carbide tooling and high speeds, but hard RE/Cu intermetallics accelerate edge wear and porosity can be exposed on finish cuts.
Can ZL207 be welded?
Not readily — weldability is rated poor (25/100). Poor fusion weldability — Cu-rich, wide-freezing-range alloy is highly hot-crack sensitive; repair only by TIG with Al-Cu filler and immediate re-aging, otherwise use mechanical joints.
What surface finishes work on ZL207?
Best protected by hard anodizing, chromate-free conversion coating or heat-resistant paint; decorative anodizing gives dark, blotchy films because of Cu and RE phases.
Can ZL207 be formed, bent or molded?
Casting alloy only: use generous fillets, directional solidification and chills to counter hot tearing; pour ~700–730 °C with degassing and RE-safe fluxing, no cold forming.
What is the maximum service temperature of ZL207?
ZL207 is rated for continuous use to about 350°C (662 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between ZL207-T1 and ZL207-F?
T1 is the default condition — standard supply condition for ZL207 sand castings — direct artificial aging develops the RE/Cu dispersoid strengthening for 300–350 °C service. F: use only for non-critical or dimensionally sensitive parts; strength and heat stability are below the aged condition. Yield strength is 150 MPa in T1 versus 120 MPa in F.
How much does ZL207 cost?
ZL207 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
- 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; 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.