Aluminum ZL107 J-T6
Temper
GB ZL107 · ASTM 319.0
Highest-strength ZL107 condition; choose for metal-mould production parts with the tightest strength requirements.
Values for the J-T6 condition
Other ZL107 tempers and conditions
ZL107 is listed in 4 conditions; see the grade overview at ZL107.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As fabricated | Lowest-cost condition for lightly loaded general castings where heat treatment is not justified. | 120 | 180 | 2 | 68 HB | 28 % IACS |
permanent (metal) mould, as cast | Metal-mould as-cast condition: faster solidification raises strength over sand casting without heat treatment. | 135 | 210 | 2.5 | 75 HB | 28 % IACS |
T6Default Solution heat treated and artificially aged | Standard strengthened condition for structural sand castings needing ≥245 MPa tensile strength. | 180 | 250 | 2 | 95 HB | 27 % IACS |
J-T6This page permanent (metal) mould, solution treated and artificially aged | Highest-strength ZL107 condition; choose for metal-mould production parts with the tightest strength requirements. | 205 | 285 | 2.5 | 105 HB | 27 % IACS |
What is ZL107 J-T6?
ZL107 J-T6 is ZL107 in the J-T6 temper — highest-strength ZL107 condition; choose for metal-mould production parts with the tightest strength requirements. ZL107 J-T6 has a yield strength of 205 MPa (29.7 ksi) and a tensile strength of 285 MPa (41.3 ksi) — stronger than 54% of aluminum grades. Elongation at break is 2.5% and the elastic modulus is 74 GPa (10.7 Msi). ZL107 J-T6 has a density of 2.77 g/cm³ (0.1 lb/in³), heavier than 71% of aluminum grades. It melts at 516°C (961 °F). T6 is the default condition FabDigit quotes; J-T6 is available on request or by drawing note.
Advantages
- Low embodied carbon — 9.5 kg CO₂/kg, better than 97% of aluminum grades
- High service temperature — 200°C (392 °F), better than 90% of aluminum grades
Limitations
- Poor heat conductor — 110 W/m·K (63.6 BTU/hr·ft·°F), worse than 88% of aluminum grades
- Low electrical conductivity — 27 % IACS, worse than 86% of aluminum grades
- Limited ductility — 2.5%, worse than 83% of aluminum grades
- Hard to polish — 45/100, worse than 76% of aluminum grades
- Needs corrosion protection — 40/100, worse than 75% of aluminum grades
ZL107 J-T6 properties
Typical room-temperature values for ZL107 J-T6; 10 are specific to this condition. Other listed values are ZL107 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
ZL107 J-T6 has a density of 2.77 g/cm³ (0.1 lb/in³), heavier than 71% of aluminum grades. It melts at 516°C (961 °F).
Mechanical12
ZL107 J-T6 has a yield strength of 205 MPa (29.7 ksi) and a tensile strength of 285 MPa (41.3 ksi) — stronger than 54% of aluminum grades. Elongation at break is 2.5% and the elastic modulus is 74 GPa (10.7 Msi).
Thermal6
ZL107 J-T6 is rated for continuous service to 200°C (392 °F). It conducts heat at 110 W/m·K (63.6 BTU/hr·ft·°F), worse than 88% of aluminum grades. Thermal expansion is 21.5 µm/m·K (11.9 µin/in·°F).
Electrical3
ZL107 J-T6 conducts electricity at 27 % IACS, worse than 86% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is fair (40/100), worse than 75% of aluminum grades.
Sustainability4
Producing a kilogram of ZL107 J-T6 takes about 150 MJ of energy and emits 9.5 kg of CO₂ — less than 97% of aluminum grades. Typical recycled content is 60%.
Manufacturability7
ZL107 J-T6's machinability is good (68/100, better than 67% of aluminum grades); weldability fair (35/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with ZL107 J-T6
Is ZL107 easy to machine?
Machines well for a casting alloy thanks to the Cu content and T6 hardness; use PCD or carbide tooling because of the eutectic Si and expect abrasive tool wear.
Can ZL107 be welded?
TIG/MIG repair is possible with 4043/4047 filler but the ~4 % Cu makes it hot-crack sensitive; preheat and re-heat-treat locally repaired structural castings.
Can ZL107 be formed, bent or molded?
Excellent fluidity and low hot-tearing tendency in sand and permanent-mould casting; feed heavy sections well and degas the melt to avoid porosity.
What surface finishes work on ZL107?
Takes paint and chromate/phosphate conversion coatings well; anodizing yields only a dark grey film, so use hard-coat only for wear, not appearance.
ZL107 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 |
|---|---|---|
| Si | 6.5 – 7.5 | 7 |
| Cu | 3.5 – 4.5 | 4 |
| Fe≤0.5 for sand casting, ≤0.6 for permanent mould | ≤ 0.6 | — |
| Mgimpurity limit | ≤ 0.1 | — |
| Mnimpurity limit | ≤ 0.5 | — |
| Znimpurity limit | ≤ 0.3 | — |
| Tigrain refiner residual / impurity | ≤ 0.2 | — |
| Others (total)≤1.0 sand, ≤1.4 permanent mould | ≤ 1.4 | — |
| Al | balance | — |
ZL107 J-T6 — frequently asked
What is ZL107 J-T6 used for?
ZL107 J-T6 is typically used for general machinery castings, housings and brackets. In short: 319-equivalent general workhorse; 200 °C service capability; low hot-tearing tendency.
What is the yield strength of ZL107 J-T6?
ZL107 J-T6 has a typical yield strength of 205 MPa (29.7 ksi) and a tensile strength of 285 MPa (41.3 ksi) — stronger than 54% of aluminum grades. Strength varies by condition: see the 4 listed tempers.
Is ZL107 J-T6 easy to machine?
Reasonably — machinability is rated good (68/100, better than 67% of aluminum grades). Machines well for a casting alloy thanks to the Cu content and T6 hardness; use PCD or carbide tooling because of the eutectic Si and expect abrasive tool wear.
Can ZL107 J-T6 be welded?
With care — weldability is rated fair (35/100). TIG/MIG repair is possible with 4043/4047 filler but the ~4 % Cu makes it hot-crack sensitive; preheat and re-heat-treat locally repaired structural castings.
What surface finishes work on ZL107 J-T6?
Takes paint and chromate/phosphate conversion coatings well; anodizing yields only a dark grey film, so use hard-coat only for wear, not appearance.
Can ZL107 J-T6 be formed, bent or molded?
Excellent fluidity and low hot-tearing tendency in sand and permanent-mould casting; feed heavy sections well and degas the melt to avoid porosity.
What is the maximum service temperature of ZL107 J-T6?
ZL107 J-T6 is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between ZL107-T6 and ZL107-F?
T6 is the default condition — standard strengthened condition for structural sand castings needing ≥245 MPa tensile strength. F: lowest-cost condition for lightly loaded general castings where heat treatment is not justified. Yield strength is 180 MPa in T6 versus 120 MPa in F.
Sources
- ASM Handbook Vol.2: Properties and Selection — Nonferrous Alloys (319.0) — ASM International (1990)
- ASM Handbook Vol.15: Casting — ASM International (2008)
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.