Aluminum ZL112
GB ZL112
ZL112 is an AlSi9Cu2 general-purpose casting alloy corresponding to ANSI/AA 319.0, available as-cast (F) and in T5, T6 and T7.
Reference datasheet — ZL112 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 F condition
ZL112 tempers and conditions
ZL112 is supplied in 4 conditions, soft to hard. F 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 |
|---|---|---|---|---|---|---|
FDefault As fabricated | Default supply condition: lowest cost, adequate strength for general housings and pressure-tight castings. | 130 | 235 | 2.5 | 85 HB | 27 % IACS |
Solution heat treated and overaged (stabilized) | Use for parts that run hot or must hold dimensions long term; trades peak strength for stability and slightly better ductility. | 165 | 245 | 3 | 85 HB | 30 % IACS |
Cooled from hot working and artificially aged | Choose when higher hardness and dimensional stability are needed without the distortion risk of solution quenching. | 180 | 250 | 1.5 | 95 HB | 28 % IACS |
Solution heat treated and artificially aged | Highest strength condition — pick for structurally loaded castings where some distortion and extra cost are acceptable. | 185 | 275 | 3 | 95 HB | 28 % IACS |
What is ZL112?
ZL112 is an AlSi9Cu2 general-purpose casting alloy corresponding to ANSI/AA 319.0, available as-cast (F) and in T5, T6 and T7. Default-condition values are 130 MPa yield, 235 MPa tensile, 2.5% elongation and 85 HB, with 109 W/m·K thermal conductivity, 27% IACS and 200 °C maximum service. Silicon gives good fluidity and pressure tightness for sand, permanent-mold and low-pressure housings, while copper raises strength but lowers corrosion resistance and increases hot-cracking risk in repair welds. Where corrosion resistance or ductility matters more, a Cu-free Al-Si-Mg alloy such as 356.0 is the usual substitute. ZL112 has a density of 2.79 g/cm³ (0.101 lb/in³), heavier than 77% of aluminum grades. It melts at 516°C (961 °F). ZL112 has a yield strength of 130 MPa (18.9 ksi) and a tensile strength of 235 MPa (34.1 ksi) — weaker than 73% of aluminum grades. Elongation at break is 2.5% and the elastic modulus is 74 GPa (10.7 Msi).
What is ZL112 used for?
- Pump housings
- Valve bodies
- Engine blocks and crankcases
- Gearbox and transmission housings
- Hydraulic manifolds
- Compressor bodies
- Oil pans and covers
Advantages
- High service temperature — 200°C (392 °F), better than 90% of aluminum grades
Limitations
- Hard to polish — 35/100, worse than 98% of aluminum grades
- Limited formability — 5/100, worse than 94% of aluminum grades
- Poor heat conductor — 109 W/m·K (63 BTU/hr·ft·°F), worse than 90% of aluminum grades
- Low electrical conductivity — 27 % IACS, worse than 86% of aluminum grades
- Limited ductility — 2.5%, worse than 83% of aluminum grades
ZL112 properties
Typical room-temperature values for ZL112-F; bars are the position among aluminum grades.
Physical3
ZL112 has a density of 2.79 g/cm³ (0.101 lb/in³), heavier than 77% of aluminum grades. It melts at 516°C (961 °F).
Mechanical12
ZL112 has a yield strength of 130 MPa (18.9 ksi) and a tensile strength of 235 MPa (34.1 ksi) — weaker than 73% of aluminum grades. Elongation at break is 2.5% and the elastic modulus is 74 GPa (10.7 Msi).
Thermal6
ZL112 is rated for continuous service to 200°C (392 °F). It conducts heat at 109 W/m·K (63 BTU/hr·ft·°F), worse than 90% of aluminum grades. Thermal expansion is 21.5 µm/m·K (11.9 µin/in·°F).
Electrical3
ZL112 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 ZL112 takes about 200 MJ of energy and emits 12 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 80%.
Manufacturability7
ZL112's machinability is good (65/100, better than 62% of aluminum grades); weldability fair (45/100); 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. ZL112 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with ZL112
Is ZL112 easy to machine?
Machines well with carbide or PCD tooling and free chip breaking; primary Si particles cause abrasive wear, so use high speed, positive rake and flood coolant.
Can ZL112 be welded?
Fair — repair welding with 4043 or 4145 filler is possible but Cu content raises hot-cracking risk; preheat 150–200 °C and re-age heat-treated parts after welding.
Can ZL112 be formed, bent or molded?
Foundry alloy only: good fluidity and pressure tightness for sand, permanent-mold and low-pressure casting; feed heavy sections well and control Fe to avoid brittle needles.
ZL112 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 |
|---|---|---|
| Siper AA 319.0; Chinese literature describes ZL112 as an AlSi9Cu2-type alloy, so verify Si level with the foundry (8–10 % in some AlSi9Cu2 chemistries) | 5.5 – 6.5 | 6 |
| Cusome AlSi9Cu2 chemistries run 1.5–2.5 % Cu | 3 – 4 | 3.5 |
| Fe0.8 max for sand castings | ≤ 1 | 0.6 |
| Mn | ≤ 0.5 | 0.2 |
| Mghigher Mg (0.2–0.5) in the 319-derived heat-treatable variants | ≤ 0.1 | 0.05 |
| Ni | ≤ 0.35 | |
| Zn | ≤ 1 | 0.3 |
| Tigrain refiner | ≤ 0.25 | 0.1 |
| Others (total) | ≤ 0.5 | |
| Al | balance |
What surface finishes work on ZL112?
Best finished by chromate/anodic hard coat, powder coat or paint; decorative sulfuric anodizing gives a dark blotchy gray because of Si and Cu, and Cu content lowers coating corrosion life.
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 ZL112 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Similar grades
- 319.0
How much does ZL112 cost?
ZL112 is a standard-cost aluminum ($$), cheaper than about 71% 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.
ZL112 — frequently asked
What is ZL112 used for?
ZL112 is typically used for pump housings, valve bodies, engine blocks and crankcases, gearbox and transmission housings, hydraulic manifolds and compressor bodies. In short: pressure-tight Al-Si-Cu workhorse; good castability, moderate strength; copper limits corrosion life.
What is the yield strength of ZL112?
ZL112 has a typical yield strength of 130 MPa (18.9 ksi) and a tensile strength of 235 MPa (34.1 ksi) — weaker than 73% of aluminum grades. Strength varies by condition: see the 4 listed tempers.
Is ZL112 easy to machine?
Reasonably — machinability is rated good (65/100, better than 62% of aluminum grades). Machines well with carbide or PCD tooling and free chip breaking; primary Si particles cause abrasive wear, so use high speed, positive rake and flood coolant.
Can ZL112 be welded?
With care — weldability is rated fair (45/100). Fair — repair welding with 4043 or 4145 filler is possible but Cu content raises hot-cracking risk; preheat 150–200 °C and re-age heat-treated parts after welding.
What surface finishes work on ZL112?
Best finished by chromate/anodic hard coat, powder coat or paint; decorative sulfuric anodizing gives a dark blotchy gray because of Si and Cu, and Cu content lowers coating corrosion life.
Can ZL112 be formed, bent or molded?
Foundry alloy only: good fluidity and pressure tightness for sand, permanent-mold and low-pressure casting; feed heavy sections well and control Fe to avoid brittle needles.
What is the maximum service temperature of ZL112?
ZL112 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 ZL112-F and ZL112-T6?
F is the default condition — default supply condition: lowest cost, adequate strength for general housings and pressure-tight castings. T6: highest strength condition — pick for structurally loaded castings where some distortion and extra cost are acceptable. Yield strength is 130 MPa in F versus 185 MPa in T6.
How much does ZL112 cost?
ZL112 is a standard-cost aluminum ($$), cheaper than about 71% 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
- GB/T 1173 Casting aluminium alloys — SAC (2013)
- ASTM B26/B26M Aluminum-Alloy Sand Castings — ASTM (2018)
- ASTM B108/B108M Aluminum-Alloy Permanent Mold Castings — ASTM (2019)
- ASM Handbook Vol.2 — Properties of Aluminum Casting Alloys (319.0) — ASM International (1990)
- International Alloy Designations and Chemical Composition Limits for Aluminum Alloys in the Form of Castings and Ingot (Pink Sheets) — The Aluminum Association (2019)
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.