Aluminum 392.0
AA 392.0 · UNS A03920 · ASTM S19
392.0 is a hypereutectic Al-Si-Cu-Ni die casting alloy (A03920, S19) whose primary silicon particles provide wear resistance and low thermal expansion; F, T5, T6 and T7 conditions are on file.
Reference datasheet — 392.0 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
392.0 tempers and conditions
392.0 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 | Standard supply condition for 392.0 die castings — maximum wear resistance and dimensional simplicity at lowest cost. | 255 | 290 | 0.8 | 100 HB | 26 % IACS |
Solution heat treated and overaged (stabilized) | Pick for maximum thermal/dimensional stability in hot-running parts (pistons, compressor bodies), trading some strength for stability. | 260 | 285 | 0.8 | 105 HB | 28 % IACS |
Cooled from hot working and artificially aged | Choose when castings must hold dimensions after machining and in service near 150–200 °C; small strength gain over F. | 275 | 300 | 0.6 | 110 HB | 27 % IACS |
Solution heat treated and artificially aged | Used for gravity/permanent-mold 392.0 parts where peak strength and hardness are needed; not applicable to high-pressure die castings (blistering). | 310 | 330 | 0.5 | 125 HB | 25 % IACS |
What is 392.0?
392.0 is a hypereutectic Al-Si-Cu-Ni die casting alloy (A03920, S19) whose primary silicon particles provide wear resistance and low thermal expansion; F, T5, T6 and T7 conditions are on file. F-temper values are about 255 MPa yield, 290 MPa tensile, 100 HB and 134 W/m·K, with service to 200 °C, which suits pistons and bore surfaces that run hot. Elongation is only 0.8%, so the alloy is brittle, unsuited to shock loading and effectively unweldable for structural repair, and a machinability rating of 25 means diamond tooling. 390.0 is the nearest hypereutectic alternative. 392.0 has a density of 2.64 g/cm³ (0.0954 lb/in³), lighter than 94% of aluminum grades. It melts at 574°C (1,065 °F). 392.0 has a yield strength of 255 MPa (37 ksi) and a tensile strength of 290 MPa (42.1 ksi) — stronger than 67% of aluminum grades. Elongation at break is 0.8% and the elastic modulus is 82 GPa (11.9 Msi).
What is 392.0 used for?
- Engine pistons
- Cylinder bores
- Rotary compressor parts
Advantages
- Stiff — 82 GPa (11.9 Msi), better than 97% of aluminum grades
- High service temperature — 200°C (392 °F), better than 90% of aluminum grades
Limitations
- Limited ductility — 0.8%, worse than 97% of aluminum grades
- Difficult to machine — 25/100, worse than 96% of aluminum grades
- Limited formability — 5/100, worse than 94% of aluminum grades
- Hard to polish — 40/100, worse than 91% of aluminum grades
- Low electrical conductivity — 26 % IACS, worse than 90% of aluminum grades
392.0 properties
Typical room-temperature values for 392.0-F; bars are the position among aluminum grades.
Physical3
392.0 has a density of 2.64 g/cm³ (0.0954 lb/in³), lighter than 94% of aluminum grades. It melts at 574°C (1,065 °F).
Mechanical12
392.0 has a yield strength of 255 MPa (37 ksi) and a tensile strength of 290 MPa (42.1 ksi) — stronger than 67% of aluminum grades. Elongation at break is 0.8% and the elastic modulus is 82 GPa (11.9 Msi).
Thermal6
392.0 is rated for continuous service to 200°C (392 °F). It conducts heat at 134 W/m·K (77.4 BTU/hr·ft·°F), worse than 60% of aluminum grades. Thermal expansion is 17.8 µm/m·K (9.89 µin/in·°F).
Electrical3
392.0 conducts electricity at 26 % IACS, worse than 90% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 51% of aluminum grades.
Sustainability4
Producing a kilogram of 392.0 takes about 200 MJ of energy and emits 12 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 70%.
Manufacturability8
392.0's machinability is poor (25/100, worse than 96% of aluminum grades); weldability poor (20/100); 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. 392.0 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 392.0
Is 392.0 easy to machine?
Requires PCD or diamond-coated tooling with high speed and light feed — carbide wears in minutes against the primary Si; expect excellent chip break and good bore finish once tooling is right.
Can 392.0 be welded?
Essentially not weldable for structural repair — hot cracking and Si segregation; use mechanical joining or bonding, or 4047 filler only for cosmetic fill.
Can 392.0 be formed, bent or molded?
Casting-only alloy: melt superheat 750–800 °C with P grain refinement of primary Si, controlled cooling to keep Si particles fine; no cold forming.
392.0 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 |
|---|---|---|
| Siprimary silicon particles provide wear resistance and low CTE | 18 – 20 | 19 |
| Femax; aids die release in pressure die casting | ≤ 1.5 | 0.9 |
| Cu | 0.4 – 0.8 | 0.6 |
| Mn | 0.2 – 0.6 | 0.4 |
| MgMg2Si strengthening | 0.8 – 1.2 | 1 |
| Ni | ≤ 0.5 | |
| Zn | ≤ 0.5 | |
| Sn | ≤ 0.3 | |
| Ti | ≤ 0.2 | |
| Others (each) | ≤ 0.15 | |
| Al | balance |
What surface finishes work on 392.0?
Hard anodize gives a wear-resistant but dark, non-uniform film; chemical conversion coating or ceramic/PTFE overlays are common for bores, and polishing tends to expose Si particles.
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 392.0 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- A03920
- ASTM
- S19
How much does 392.0 cost?
392.0 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.
392.0 — frequently asked
What is 392.0 used for?
392.0 is typically used for engine pistons, cylinder bores and rotary compressor parts. In short: hypereutectic wear-resistant alloy; low thermal expansion; highest service temperature here.
What is the yield strength of 392.0?
392.0 has a typical yield strength of 255 MPa (37 ksi) and a tensile strength of 290 MPa (42.1 ksi) — stronger than 67% of aluminum grades. Strength varies by condition: see the 4 listed tempers.
Is 392.0 easy to machine?
Not especially — machinability is rated poor (25/100, worse than 96% of aluminum grades). Requires PCD or diamond-coated tooling with high speed and light feed — carbide wears in minutes against the primary Si; expect excellent chip break and good bore finish once tooling is right.
Can 392.0 be welded?
Not readily — weldability is rated poor (20/100). Essentially not weldable for structural repair — hot cracking and Si segregation; use mechanical joining or bonding, or 4047 filler only for cosmetic fill.
What surface finishes work on 392.0?
Hard anodize gives a wear-resistant but dark, non-uniform film; chemical conversion coating or ceramic/PTFE overlays are common for bores, and polishing tends to expose Si particles.
Can 392.0 be formed, bent or molded?
Casting-only alloy: melt superheat 750–800 °C with P grain refinement of primary Si, controlled cooling to keep Si particles fine; no cold forming.
What is the maximum service temperature of 392.0?
392.0 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 392.0-F and 392.0-T6?
F is the default condition — standard supply condition for 392.0 die castings — maximum wear resistance and dimensional simplicity at lowest cost. T6: used for gravity/permanent-mold 392.0 parts where peak strength and hardness are needed; not applicable to high-pressure die castings (blistering). Yield strength is 255 MPa in F versus 310 MPa in T6.
How much does 392.0 cost?
392.0 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
- Aluminum Association Teal Sheets — Designations and Chemical Composition Limits for Aluminum Alloys in the Form of Castings and Ingot — The Aluminum Association (2015)
- ASTM B85 / B108 — Aluminum-Alloy Die Castings and Permanent Mold Castings — ASTM International (2021)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Specialty Handbook: Aluminum and Aluminum Alloys — ASM International (1993)
- Cast aluminium alloy property tables (hypereutectic Al-Si series) — MatWeb / NADCA design data (2020)
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.