Aluminum 354.0
AA 354.0 · UNS A03540 · also SC92A
354.0 is an Al-Si-Cu-Mg permanent-mold casting alloy (UNS A03540, SC92A) in the ANSI/AA 3xx.x series, using about 9% Si with 1.8% Cu plus Mg and supplied F, T61 or T62.
Reference datasheet — 354.0 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 T61 condition
354.0 tempers and conditions
354.0 is supplied in 3 conditions, soft to hard. T61 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 | Pick only as an intermediate stock condition before solution treatment; 354.0 is not normally sold or used in the as-cast state. | 115 | 200 | 3 | 70 HB | 34 % IACS |
T61Default T6 variant, underaged | Standard premium-strength condition for structural permanent-mold castings needing high strength with usable ductility. | 255 | 330 | 3 | 100 HB | 32 % IACS |
T6, heat treated by the user | Choose when maximum strength and hardness are required and the lower elongation (≈2%) is acceptable. | 290 | 360 | 2 | 115 HB | 31 % IACS |
What is 354.0?
354.0 is an Al-Si-Cu-Mg permanent-mold casting alloy (UNS A03540, SC92A) in the ANSI/AA 3xx.x series, using about 9% Si with 1.8% Cu plus Mg and supplied F, T61 or T62. It is specified for structural automotive and aerospace castings that need 255 MPa yield, 330 MPa tensile and 100 HB in thin, complex sections. Elongation is only 3%, corrosion resistance is moderate, service is limited to about 175 °C, and the copper content makes the alloy hot-crack sensitive. A356.0 (EN AC-42100) is the nearest alternative when weldability and ductility matter more than strength. 354.0 has a density of 2.71 g/cm³ (0.0979 lb/in³), heavier than 51% of aluminum grades. It melts at 538°C (1,000 °F). 354.0 has a yield strength of 255 MPa (37 ksi) and a tensile strength of 330 MPa (47.9 ksi) — stronger than 67% of aluminum grades. Elongation at break is 3% and the elastic modulus is 74 GPa (10.7 Msi).
What is 354.0 used for?
- suspension components
- aerospace fittings
- high-strength housings
Advantages
- High service temperature — 175°C (347 °F), better than 83% of aluminum grades
Limitations
- Limited formability — 8/100, worse than 88% of aluminum grades
- Limited ductility — 3%, worse than 79% of aluminum grades
- Needs corrosion protection — 40/100, worse than 75% of aluminum grades
354.0 properties
Typical room-temperature values for 354.0-T61; bars are the position among aluminum grades.
Physical3
354.0 has a density of 2.71 g/cm³ (0.0979 lb/in³), heavier than 51% of aluminum grades. It melts at 538°C (1,000 °F).
Mechanical13
354.0 has a yield strength of 255 MPa (37 ksi) and a tensile strength of 330 MPa (47.9 ksi) — stronger than 67% of aluminum grades. Elongation at break is 3% and the elastic modulus is 74 GPa (10.7 Msi).
Thermal6
354.0 is rated for continuous service to 175°C (347 °F). It conducts heat at 126 W/m·K (72.8 BTU/hr·ft·°F), worse than 70% of aluminum grades. Thermal expansion is 21 µm/m·K (11.7 µin/in·°F).
Electrical3
354.0 conducts electricity at 32 % IACS, worse than 63% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is fair (40/100), worse than 75% of aluminum grades.
Sustainability4
Producing a kilogram of 354.0 takes about 205 MJ of energy and emits 12.5 kg of CO₂ — more than 76% of aluminum grades. Typical recycled content is 20%.
Manufacturability8
354.0's machinability is good (62/100, better than 55% of aluminum grades); weldability fair (35/100); formability not recommended (8/100).
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. 354.0 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 354.0
Is 354.0 easy to machine?
Machines well in T61/T62 with carbide or PCD tooling; the ~9% Si and hard Si particles cause abrasive tool wear, so use high speed, sharp positive-rake tools and flood coolant.
Can 354.0 be welded?
Fusion welding is difficult — the 1.8% Cu makes it hot-crack sensitive; if unavoidable use 4145/4043-type filler on preheated parts and re-solution + re-age locally, otherwise join mechanically.
Can 354.0 be formed, bent or molded?
Permanent-mold (and low-pressure/gravity) casting alloy with excellent fluidity for thin, complex sections; requires tight Fe control, good gating/feeding and a full T6-type cycle to develop properties — not cold formable.
354.0 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 |
|---|---|---|
| Si | 8.6 – 9.4 | 9 |
| Cu | 1.6 – 2 | 1.8 |
| Mg | 0.4 – 0.6 | 0.5 |
| Femax — low iron required for premium ductility | ≤ 0.2 | |
| Mn | ≤ 0.1 | |
| Zn | ≤ 0.1 | |
| Timax — grain refinement | ≤ 0.2 | |
| Others (each) | ≤ 0.05 | |
| Others (total) | ≤ 0.15 | |
| Al | balance |
What surface finishes work on 354.0?
Chromate conversion or paint/powder coat for corrosion protection; hard anodizing gives a wear layer but decorative anodizing is dark and blotchy due to silicon; impregnation is common for pressure-tight parts.
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 354.0 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- A03540
- Trade names
- SC92A
How much does 354.0 cost?
354.0 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.
354.0 — frequently asked
What is 354.0 used for?
354.0 is typically used for suspension components, aerospace fittings and high-strength housings. In short: high-strength permanent-mold alloy; stronger than A356.0 T6; hot-crack sensitive.
What is the yield strength of 354.0?
354.0 has a typical yield strength of 255 MPa (37 ksi) and a tensile strength of 330 MPa (47.9 ksi) — stronger than 67% of aluminum grades. Strength varies by condition: see the 3 listed tempers.
Is 354.0 easy to machine?
Reasonably — machinability is rated good (62/100, better than 55% of aluminum grades). Machines well in T61/T62 with carbide or PCD tooling; the ~9% Si and hard Si particles cause abrasive tool wear, so use high speed, sharp positive-rake tools and flood coolant.
Can 354.0 be welded?
With care — weldability is rated fair (35/100). Fusion welding is difficult — the 1.8% Cu makes it hot-crack sensitive; if unavoidable use 4145/4043-type filler on preheated parts and re-solution + re-age locally, otherwise join mechanically.
What surface finishes work on 354.0?
Chromate conversion or paint/powder coat for corrosion protection; hard anodizing gives a wear layer but decorative anodizing is dark and blotchy due to silicon; impregnation is common for pressure-tight parts.
Can 354.0 be formed, bent or molded?
Permanent-mold (and low-pressure/gravity) casting alloy with excellent fluidity for thin, complex sections; requires tight Fe control, good gating/feeding and a full T6-type cycle to develop properties — not cold formable.
What is the maximum service temperature of 354.0?
354.0 is rated for continuous use to about 175°C (347 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 354.0-T61 and 354.0-F?
T61 is the default condition — standard premium-strength condition for structural permanent-mold castings needing high strength with usable ductility. F: pick only as an intermediate stock condition before solution treatment; 354.0 is not normally sold or used in the as-cast state. Yield strength is 255 MPa in T61 versus 115 MPa in F.
How much does 354.0 cost?
354.0 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
- Registration Record of Aluminum Association Alloy Designations and Chemical Composition Limits for Aluminum Alloys in the Form of Castings and Ingot ('Pink Sheets') — The Aluminum Association (2018)
- ASTM B108/B108M — Aluminum-Alloy Permanent Mold Castings — ASTM International (2019)
- ASM Handbook, Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASM Specialty Handbook: Aluminum and Aluminum Alloys — ASM International (1993)
- SAE AMS 4225 / UNS A03540 alloy data — SAE International (2017)
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.