Aluminum ADC5-O (Annealed)
Temper
JIS ADC5
Used when maximum dimensional stability and SCC resistance are wanted for service above room temperature, accepting a drop in strength.
Values for the O condition
Other ADC5 tempers and conditions
ADC5 is listed in 3 conditions; see the grade overview at ADC5.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
OThis page Annealed | Used when maximum dimensional stability and SCC resistance are wanted for service above room temperature, accepting a drop in strength. | 130 | 250 | 11 | 58 HB | 26 % IACS |
As-cast plus low-temperature stress relief | Choose when castings must hold tight tolerances after heavy machining; strength is essentially unchanged from F. | 170 | 290 | 9 | 68 HB | 24.5 % IACS |
FDefault As fabricated | Standard supply condition for ADC5 high-pressure die castings; Al-Mg alloys are not precipitation hardenable so as-cast properties are used directly. | 175 | 300 | 8 | 70 HB | 24 % IACS |
What is ADC5-O?
ADC5-O is ADC5 in the O temper — used when maximum dimensional stability and SCC resistance are wanted for service above room temperature, accepting a drop in strength. ADC5-O has a yield strength of 130 MPa (18.9 ksi) and a tensile strength of 250 MPa (36.3 ksi) — weaker than 73% of aluminum grades. Elongation at break is 11% and the elastic modulus is 70 GPa (10.2 Msi). ADC5-O has a density of 2.58 g/cm³ (0.0932 lb/in³), lighter than 98% of aluminum grades. It melts at 535°C (995 °F). F is the default condition FabDigit quotes; O is available on request or by drawing note.
Advantages
- Polishes to a fine finish — 75/100, better than 90% of aluminum grades
- Good corrosion resistance — 75/100, better than 88% of aluminum grades
- Easy to machine — 76/100, better than 87% of aluminum grades
Limitations
- Poor heat conductor — 103 W/m·K (59.5 BTU/hr·ft·°F), worse than 92% of aluminum grades
- Low electrical conductivity — 26 % IACS, worse than 90% of aluminum grades
ADC5-O properties
Typical room-temperature values for ADC5-O; 22 are specific to this condition. Other listed values are ADC5 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
ADC5-O has a density of 2.58 g/cm³ (0.0932 lb/in³), lighter than 98% of aluminum grades. It melts at 535°C (995 °F).
Mechanical12
ADC5-O has a yield strength of 130 MPa (18.9 ksi) and a tensile strength of 250 MPa (36.3 ksi) — weaker than 73% of aluminum grades. Elongation at break is 11% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
ADC5-O is rated for continuous service to 150°C (302 °F). It conducts heat at 103 W/m·K (59.5 BTU/hr·ft·°F), worse than 92% of aluminum grades. Thermal expansion is 24.1 µm/m·K (13.4 µin/in·°F).
Electrical3
ADC5-O conducts electricity at 26 % IACS, worse than 90% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (75/100), better than 88% of aluminum grades.
Sustainability4
Producing a kilogram of ADC5-O takes about 200 MJ of energy and emits 12 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 50%.
Manufacturability8
ADC5-O's machinability is very good (76/100, better than 87% of aluminum grades); weldability good (55/100); formability poor (26/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with ADC5-O
Is ADC5 easy to machine?
Excellent — Si-free matrix cuts cleanly with polished-flute carbide, high speed and low built-up-edge; chips are stringy so use chipbreaker geometry and coolant.
Can ADC5 be welded?
TIG/MIG weldable with ER5356 filler on low-porosity (vacuum or squeeze) castings; conventional HPDC parts blister from entrapped gas, so mechanical joining or adhesive is preferred.
Can ADC5 be formed, bent or molded?
Hardest of the common die-cast alloys to run: poor fluidity, strong hot-tearing and die-soldering tendency, requires cover-gas/melt protection, higher metal and die temperatures and generous fillets.
What surface finishes work on ADC5?
Best die-cast aluminium for clear or dyed anodizing and bright polishing; also takes chromate-free conversion coats and powder paint well thanks to its high natural corrosion resistance.
ADC5 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 |
|---|---|---|
| MgJIS H 5302 ADC5; A518.0 narrows to 7.5–8.5 % | 4 – 8.5 | 6.5 |
| Sikept low to preserve anodizing brightness | ≤ 0.3 | 0.15 |
| Fereduces die soldering | ≤ 1.8 | 1 |
| Culimited for corrosion resistance | ≤ 0.2 | 0.05 |
| Mn | ≤ 0.3 | 0.15 |
| Zn | ≤ 0.1 | 0.05 |
| Ni | ≤ 0.1 | 0.02 |
| Sn | ≤ 0.1 | 0.01 |
| Al | balance | — |
ADC5-O — frequently asked
What is ADC5-O used for?
ADC5-O is typically used for marine hardware, food processing equipment and decorative parts. In short: best-anodizing die-cast aluminum; highest corrosion resistance ADC; hardest ADC to cast.
What is the yield strength of ADC5-O?
ADC5-O has a typical yield strength of 130 MPa (18.9 ksi) and a tensile strength of 250 MPa (36.3 ksi) — weaker than 73% of aluminum grades. Strength varies by condition: see the 3 listed tempers.
Is ADC5-O easy to machine?
Yes — machinability is rated very good (76/100, better than 87% of aluminum grades). Excellent — Si-free matrix cuts cleanly with polished-flute carbide, high speed and low built-up-edge; chips are stringy so use chipbreaker geometry and coolant.
Can ADC5-O be welded?
Yes — weldability is rated good (55/100). TIG/MIG weldable with ER5356 filler on low-porosity (vacuum or squeeze) castings; conventional HPDC parts blister from entrapped gas, so mechanical joining or adhesive is preferred.
What surface finishes work on ADC5-O?
Best die-cast aluminium for clear or dyed anodizing and bright polishing; also takes chromate-free conversion coats and powder paint well thanks to its high natural corrosion resistance.
Can ADC5-O be formed, bent or molded?
Hardest of the common die-cast alloys to run: poor fluidity, strong hot-tearing and die-soldering tendency, requires cover-gas/melt protection, higher metal and die temperatures and generous fillets.
What is the maximum service temperature of ADC5-O?
ADC5-O 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.
What is the difference between ADC5-F and ADC5-O?
F is the default condition — standard supply condition for ADC5 high-pressure die castings; Al-Mg alloys are not precipitation hardenable so as-cast properties are used directly. O: used when maximum dimensional stability and SCC resistance are wanted for service above room temperature, accepting a drop in strength. Yield strength is 175 MPa in F versus 130 MPa in O.
Sources
- JIS H 5302 Aluminium alloy die castings — JSA (2006)
- ASM Handbook Vol.2: Properties and Selection – Nonferrous Alloys (518.0) — ASM International (1990)
- ASM Handbook Vol.13B: Corrosion – Materials (Al-Mg alloys) — ASM International (2005)
- ASTM B85 / B85M Aluminum-Alloy Die Castings — ASTM (2018)
- NADCA Product Specification Standards for Die Castings — NADCA (2018)
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.