Aluminum A360-SR (Stress relieved)
Heat-treated state
AA A360 · UNS A13600
Standard condition for printed AlSi10Mg parts that must hold tight tolerances after machining — lower stress, more ductility.
Values for the SR condition
Other A360 tempers and conditions
A360 is listed in 4 conditions; see the grade overview at A360.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As fabricated | Standard supply condition for A360 die castings — use for thin-wall pressure-tight housings needing strength above ADC12. | 165 | 317 | 3.5 | 75 HB | 29 % IACS |
SRThis page Stress relieved | Standard condition for printed AlSi10Mg parts that must hold tight tolerances after machining — lower stress, more ductility. | 215 | 345 | 8 | 95 HB | 31 % IACS |
Solution heat treated and artificially aged | Choose for printed or gravity-cast AlSi10Mg needing isotropic, stable properties; not applied to gas-porous high-pressure die castings (blistering risk). | 235 | 335 | 8 | 100 HB | 35 % IACS |
As built (as printed) | Pick for printed AlSi10Mg parts used straight off the machine — highest strength but high residual stress and anisotropy. | 255 | 430 | 5 | 114 HB | 26 % IACS |
What is A360-SR?
A360-SR is A360 heat treated to SR — standard condition for printed AlSi10Mg parts that must hold tight tolerances after machining — lower stress, more ductility. A360-SR has a yield strength of 215 MPa (31.2 ksi) and a tensile strength of 345 MPa (50 ksi) — stronger than 58% of aluminum grades. Elongation at break is 8% and the elastic modulus is 70 GPa (10.2 Msi). A360-SR has a density of 2.63 g/cm³ (0.095 lb/in³), lighter than 95% of aluminum grades. It melts at 557°C (1,035 °F).
A360-SR properties
Typical room-temperature values for A360-SR; 22 are specific to this condition. Other listed values are A360 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
A360-SR has a density of 2.63 g/cm³ (0.095 lb/in³), lighter than 95% of aluminum grades. It melts at 557°C (1,035 °F).
Mechanical14
A360-SR has a yield strength of 215 MPa (31.2 ksi) and a tensile strength of 345 MPa (50 ksi) — stronger than 58% of aluminum grades. Elongation at break is 8% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
A360-SR is rated for continuous service to 150°C (302 °F). It conducts heat at 140 W/m·K (80.9 BTU/hr·ft·°F), worse than 52% of aluminum grades. Thermal expansion is 21 µm/m·K (11.7 µin/in·°F).
Electrical3
A360-SR conducts electricity at 31 % IACS, worse than 68% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), better than 62% of aluminum grades.
Sustainability4
Producing a kilogram of A360-SR takes about 200 MJ of energy and emits 12.5 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 70%.
Manufacturability7
A360-SR's machinability is good (55/100, worse than 59% of aluminum grades); weldability good (55/100); formability poor (15/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with A360-SR
Is A360 easy to machine?
Machines freely with sharp positive-rake tools and flood coolant, but 9–10 % Si is abrasive — use PCD or polished carbide and expect built-up edge with soft alloy chips.
Can A360 be welded?
TIG/MIG with 4043 or 4047 filler works on printed or low-porosity parts; high-pressure die castings often blister or crack from trapped gas, so favour mechanical joining or adhesive.
Can A360 be formed, bent or molded?
Excellent die-casting fluidity and hot-tear resistance for 1–3 mm walls; keep die temperature and vacuum control tight to limit porosity, and avoid post-cast solution treatment on HPDC parts.
What surface finishes work on A360?
Takes chromate/chrome-free conversion coatings, powder coat and paint well; anodizing gives a dark grey film, so use hardcoat only where wear matters and shot-blast or vibratory finish for cosmetics.
A360 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 | 9 – 10 | 9.5 |
| Mg | 0.4 – 0.6 | 0.5 |
| Felow-Fe version of 360.0 (which allows 2.0 %) | ≤ 1.3 | — |
| Cu | ≤ 0.6 | — |
| Mn | ≤ 0.35 | — |
| Ni | ≤ 0.5 | — |
| Zn | ≤ 0.5 | — |
| Sn | ≤ 0.15 | — |
| Others (total)each 0.10 max, total 0.25 max | ≤ 0.25 | — |
| Al | balance | — |
A360-SR — frequently asked
What is A360-SR used for?
A360-SR is typically used for cellphone and electronics housings, cookware, L-PBF printed brackets and manifolds, pressure-tight pump and valve housings, automotive covers and brackets and lighting and heat-sink bodies. In short: pressure die cast Al-Si-Mg.
What is the yield strength of A360-SR?
A360-SR has a typical yield strength of 215 MPa (31.2 ksi) and a tensile strength of 345 MPa (50 ksi) — stronger than 58% of aluminum grades. Strength varies by condition: see the 4 listed tempers.
Is A360-SR easy to machine?
Reasonably — machinability is rated good (55/100, worse than 59% of aluminum grades). Machines freely with sharp positive-rake tools and flood coolant, but 9–10 % Si is abrasive — use PCD or polished carbide and expect built-up edge with soft alloy chips.
Can A360-SR be welded?
Yes — weldability is rated good (55/100). TIG/MIG with 4043 or 4047 filler works on printed or low-porosity parts; high-pressure die castings often blister or crack from trapped gas, so favour mechanical joining or adhesive.
What surface finishes work on A360-SR?
Takes chromate/chrome-free conversion coatings, powder coat and paint well; anodizing gives a dark grey film, so use hardcoat only where wear matters and shot-blast or vibratory finish for cosmetics.
Can A360-SR be formed, bent or molded?
Excellent die-casting fluidity and hot-tear resistance for 1–3 mm walls; keep die temperature and vacuum control tight to limit porosity, and avoid post-cast solution treatment on HPDC parts.
What is the maximum service temperature of A360-SR?
A360-SR is rated for continuous use to about 150°C (302 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in A360-SR?
Yes — A360-SR is available for CNC machining; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- ASTM B85/B85M — Aluminum-Alloy Die Castings — ASTM International (2018)
- Designations and Chemical Composition Limits for Aluminum Alloys in the Form of Castings and Ingot (Pink Sheets) — The Aluminum Association (2018)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Specialty Handbook: Aluminum and Aluminum Alloys — ASM International (1993)
- AlSi10Mg L-PBF material data sheet — EOS / SLM Solutions (2023)
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.