Aluminum B535.0-T5
Temper
AA B535.0 · UNS A25350
T5 = cooled from hot working and artificially aged
Optional low-temperature stabilizing soak used for dimensionally critical instrument castings; relieves residual stress with little strength change.
Values for the T5 condition
Other B535.0 tempers and conditions
B535.0 is listed in 3 conditions; see the grade overview at B535.0.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
FDefault As fabricated | Standard supply condition: sand castings used as-cast, no heat treatment, best combination of ductility, corrosion resistance and machinability. | 125 | 255 | 9 | 65 HB | 24 % IACS |
T5This page Cooled from hot working and artificially aged | Optional low-temperature stabilizing soak used for dimensionally critical instrument castings; relieves residual stress with little strength change. | 125 | 250 | 9 | 65 HB | 24 % IACS |
F | Choose when higher production rates and slightly finer structure are needed; permanent-mold pouring of high-Mg alloys demands tight gating and mold-coat control. | 135 | 275 | 10 | 70 HB | 24 % IACS |
What is B535.0-T5?
B535.0-T5 is B535.0 in the T5 temper — optional low-temperature stabilizing soak used for dimensionally critical instrument castings; relieves residual stress with little strength change. B535.0-T5 has a yield strength of 125 MPa (18.1 ksi) and a tensile strength of 250 MPa (36.3 ksi) — weaker than 75% of aluminum grades. Elongation at break is 9% and the elastic modulus is 70 GPa (10.2 Msi). B535.0-T5 has a density of 2.62 g/cm³ (0.0947 lb/in³), lighter than 96% of aluminum grades. It melts at 549°C (1,020 °F). F is the default condition FabDigit quotes; T5 is available on request or by drawing note.
Advantages
- Easy to machine — 88/100, better than 96% of aluminum grades
- Good corrosion resistance — 78/100, better than 94% of aluminum grades
- Polishes to a fine finish — 80/100, better than 93% of aluminum grades
Limitations
- Low electrical conductivity — 24 % IACS, worse than 95% of aluminum grades
- Poor heat conductor — 100 W/m·K (57.8 BTU/hr·ft·°F), worse than 93% of aluminum grades
- Limited service temperature — 120°C (248 °F), worse than 79% of aluminum grades
- Low strength — 125 MPa (18.1 ksi), worse than 75% of aluminum grades
B535.0-T5 properties
Typical room-temperature values for B535.0-T5; 20 are specific to this condition. Other listed values are B535.0 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
B535.0-T5 has a density of 2.62 g/cm³ (0.0947 lb/in³), lighter than 96% of aluminum grades. It melts at 549°C (1,020 °F).
Mechanical10
B535.0-T5 has a yield strength of 125 MPa (18.1 ksi) and a tensile strength of 250 MPa (36.3 ksi) — weaker than 75% of aluminum grades. Elongation at break is 9% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
B535.0-T5 is rated for continuous service to 120°C (248 °F). It conducts heat at 100 W/m·K (57.8 BTU/hr·ft·°F), worse than 93% of aluminum grades. Thermal expansion is 24.5 µm/m·K (13.6 µin/in·°F).
Electrical3
B535.0-T5 conducts electricity at 24 % IACS, worse than 95% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (78/100), better than 94% of aluminum grades.
Sustainability4
Producing a kilogram of B535.0-T5 takes about 200 MJ of energy and emits 12 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 55%.
Manufacturability7
B535.0-T5's machinability is excellent (88/100, better than 96% of aluminum grades); weldability very good (75/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with B535.0-T5
Is B535.0 easy to machine?
One of the best-machining cast aluminums — sharp uncoated carbide or PCD, high speed, low feed pressure, gives bright chip-free surfaces with minimal built-up edge.
Can B535.0 be welded?
Readily GTAW/GMAW welded with 5356 or 5556 filler; preheat sparingly, keep interpass low and avoid Si-bearing 4043 filler which forms brittle Mg2Si.
Can B535.0 be formed, bent or molded?
Difficult foundry alloy: low fluidity and high hot-tear sensitivity require chills, generous risering, careful degassing/fluxing and tight mold-coating; not suitable for thin, intricate die castings.
What surface finishes work on B535.0?
Anodizes bright and uniformly (clear, color and hard coats), polishes and buffs well; chromate/trivalent conversion coating gives good paint adhesion; not brazeable.
B535.0 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 |
|---|---|---|
| Mgprimary strengthening solute | 6.5 – 7.5 | 7 |
| Tigrain refiner | 0.1 – 0.25 | 0.18 |
| Siimpurity limit | ≤ 0.15 | — |
| Feimpurity limit | ≤ 0.15 | — |
| Cuimpurity limit (relaxed vs 535.0) | ≤ 0.1 | — |
| Mnimpurity limit | ≤ 0.05 | — |
| Znimpurity limit | ≤ 0.05 | — |
| Besometimes added at trace level to limit melt oxidation; check local regulations | ≤ 0 | — |
| Others (each) | ≤ 0.05 | — |
| Others (total) | ≤ 0.15 | — |
| Al | balance | — |
B535.0-T5 — frequently asked
What is B535.0-T5 used for?
B535.0-T5 is typically used for marine fittings and deck hardware, architectural and façade castings, anodized housings and covers, polished decorative castings, saltwater-exposed brackets and machined instrument bases. In short: free-machining marine casting; no heat treatment required; difficult to pour.
What is the yield strength of B535.0-T5?
B535.0-T5 has a typical yield strength of 125 MPa (18.1 ksi) and a tensile strength of 250 MPa (36.3 ksi) — weaker than 75% of aluminum grades. Strength varies by condition: see the 3 listed tempers.
Is B535.0-T5 easy to machine?
Yes — machinability is rated excellent (88/100, better than 96% of aluminum grades). One of the best-machining cast aluminums — sharp uncoated carbide or PCD, high speed, low feed pressure, gives bright chip-free surfaces with minimal built-up edge.
Can B535.0-T5 be welded?
Yes — weldability is rated very good (75/100). Readily GTAW/GMAW welded with 5356 or 5556 filler; preheat sparingly, keep interpass low and avoid Si-bearing 4043 filler which forms brittle Mg2Si.
What surface finishes work on B535.0-T5?
Anodizes bright and uniformly (clear, color and hard coats), polishes and buffs well; chromate/trivalent conversion coating gives good paint adhesion; not brazeable.
Can B535.0-T5 be formed, bent or molded?
Difficult foundry alloy: low fluidity and high hot-tear sensitivity require chills, generous risering, careful degassing/fluxing and tight mold-coating; not suitable for thin, intricate die castings.
What is the maximum service temperature of B535.0-T5?
B535.0-T5 is rated for continuous use to about 120°C (248 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between B535.0-F and B535.0 F-PM?
F is the default condition — standard supply condition: sand castings used as-cast, no heat treatment, best combination of ductility, corrosion resistance and machinability. F-PM: choose when higher production rates and slightly finer structure are needed; permanent-mold pouring of high-Mg alloys demands tight gating and mold-coat control. Yield strength is 125 MPa in F versus 135 MPa in F-PM.
Sources
- ASTM B26/B26M — Aluminum-Alloy Sand Castings — ASTM International (2018)
- Registration Record of International Alloy Designations and Chemical Composition Limits for Aluminum Alloys in the Form of Castings and Ingot (Pink Sheets) — The Aluminum Association (2019)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
- Aluminum Casting Technology — American Foundry Society (2001)
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.