Aluminum B535.0
AA B535.0 · UNS A25350
B535.0 is the relaxed-impurity secondary version of the 535.0 Al-Mg casting alloy, used as-cast (F, F-PM) or in T5 with no solution treatment required.
Reference datasheet — B535.0 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
B535.0 tempers and conditions
B535.0 is supplied in 3 conditions, soft to hard. F 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 |
|---|---|---|---|---|---|---|
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 |
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?
B535.0 is the relaxed-impurity secondary version of the 535.0 Al-Mg casting alloy, used as-cast (F, F-PM) or in T5 with no solution treatment required. It offers 255 MPa tensile, 125 MPa yield, 9% elongation and 65 HB together with a machinability rating of 88, a corrosion resistance score of 78 and bright anodizing, mainly in sand and permanent-mold marine and architectural castings. Foundry practice is demanding because of low fluidity and hot-tear sensitivity, and service is limited to 120 °C at 100 W/m·K; A535.0 is the tighter-impurity equivalent. B535.0 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). B535.0 has a yield strength of 125 MPa (18.1 ksi) and a tensile strength of 255 MPa (37 ksi) — weaker than 75% of aluminum grades. Elongation at break is 9% and the elastic modulus is 70 GPa (10.2 Msi).
What is B535.0 used for?
- Marine fittings and deck hardware
- Architectural and façade castings
- Anodized housings and covers
- Polished decorative castings
- Saltwater-exposed brackets
- Machined instrument bases
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 properties
Typical room-temperature values for B535.0-F; bars are the position among aluminum grades.
Physical3
B535.0 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 has a yield strength of 125 MPa (18.1 ksi) and a tensile strength of 255 MPa (37 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 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 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 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's machinability is excellent (88/100, better than 96% of aluminum grades); weldability very good (75/100).
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. B535.0 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with B535.0
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.
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 |
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.
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 B535.0 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- A25350
How much does B535.0 cost?
B535.0 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.
B535.0 — frequently asked
What is B535.0 used for?
B535.0 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?
B535.0 has a typical yield strength of 125 MPa (18.1 ksi) and a tensile strength of 255 MPa (37 ksi) — weaker than 75% of aluminum grades. Strength varies by condition: see the 3 listed tempers.
Is B535.0 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 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?
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 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?
B535.0 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.
How much does B535.0 cost?
B535.0 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
- 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; 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.