Aluminum 4015
AA 4015 · UNS A94015 · EN AW-4015, AlSi2Mn
4015 is a moderate-silicon, manganese-stabilized wrought Al-Si alloy (EN AW-4015, AlSi2Mn, UNS A94015) rolled as brazing sheet core, heat exchanger tube and fin stock in O, H111, H12–H18 and H22–H26.
Reference datasheet — 4015 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 O condition
4015 tempers and conditions
4015 is supplied in 10 conditions, soft to hard. O is the default FabDigit quotes; the values on this page are for it.
Compare all 10 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ODefault Annealed | Default supply condition for brazing-sheet core and deep-drawn parts; maximum formability, lowest strength. | 55 | 120 | 26 | 31 HB | 43 % IACS |
Slightly strain hardened | Choose when flat, essentially soft sheet with mill leveling is needed; properties only marginally above O. | 60 | 125 | 23 | 33 HB | 43 % IACS |
As fabricated | Mill product taken directly from hot working; used as feedstock for further rolling, cladding or brazing-sheet manufacture. | 70 | 135 | 20 | 35 HB | 43 % IACS |
Strain hardened and partially annealed, quarter hard | Stabilized quarter-hard sheet giving H12-level strength with better ductility for forming. | 110 | 145 | 12 | 39 HB | 42.5 % IACS |
Strain hardened, quarter hard | Light cold work for slightly stiffer sheet that still bends and forms readily. | 120 | 148 | 9 | 40 HB | 42.5 % IACS |
Strain hardened and partially annealed, half hard | Half-hard sheet with recovered ductility; preferred over H14 when tighter bend radii are needed. | 125 | 160 | 9 | 44 HB | 42 % IACS |
Strain hardened, half hard | Most common work-hardened stock for brazed tube/plate stock needing handling stiffness before the braze cycle. | 138 | 163 | 6 | 45 HB | 42 % IACS |
Strain hardened and partially annealed, three-quarter hard | Stabilized three-quarter hard coil for roll-formed tube where springback must stay consistent. | 148 | 178 | 6 | 49 HB | 41.5 % IACS |
Strain hardened, three-quarter hard | Higher strength thin gauge where only mild bending is required. | 158 | 180 | 4 | 50 HB | 42 % IACS |
Strain hardened, full hard | Maximum as-rolled strength and flatness for fin/tube stock that is formed only by roll-forming, then softened by brazing. | 180 | 200 | 3 | 56 HB | 41.5 % IACS |
What is 4015?
4015 is a moderate-silicon, manganese-stabilized wrought Al-Si alloy (EN AW-4015, AlSi2Mn, UNS A94015) rolled as brazing sheet core, heat exchanger tube and fin stock in O, H111, H12–H18 and H22–H26. It is chosen where post-braze strength and corrosion resistance matter more than as-rolled strength: default values are 120 MPa tensile, 55 MPa yield, 26% elongation, 31 HB, 165 W/m·K and 43% IACS, with formability 90, weldability 88 and corrosion resistance 64. Machinability is poor (score 32) and service temperature is capped near 175 °C. For higher post-braze mechanical strength, step up to 4115. 4015 has a density of 2.69 g/cm³ (0.0972 lb/in³), lighter than 67% of aluminum grades. It melts at 630°C (1,166 °F). 4015 has a yield strength of 55 MPa (7.98 ksi) and a tensile strength of 120 MPa (17.4 ksi) — weaker than 94% of aluminum grades. Elongation at break is 26% and the elastic modulus is 70 GPa (10.2 Msi).
What is 4015 used for?
- brazing sheet core stock
- heat exchanger tubing
- fin stock
Advantages
- Ductile — tolerates forming and impact — 26%, better than 94% of aluminum grades
- Forms and bends easily — 90/100, better than 93% of aluminum grades
- Readily welded — 88/100, better than 85% of aluminum grades
- High service temperature — 175°C (347 °F), better than 83% of aluminum grades
- High electrical conductivity — 43 % IACS, better than 83% of aluminum grades
Limitations
- Low strength — 55 MPa (7.98 ksi), worse than 94% of aluminum grades
- Difficult to machine — 32/100, worse than 89% of aluminum grades
4015 properties
Typical room-temperature values for 4015-O; bars are the position among aluminum grades.
Physical3
4015 has a density of 2.69 g/cm³ (0.0972 lb/in³), lighter than 67% of aluminum grades. It melts at 630°C (1,166 °F).
Mechanical11
4015 has a yield strength of 55 MPa (7.98 ksi) and a tensile strength of 120 MPa (17.4 ksi) — weaker than 94% of aluminum grades. Elongation at break is 26% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
4015 is rated for continuous service to 175°C (347 °F). It conducts heat at 165 W/m·K (95.3 BTU/hr·ft·°F), better than 79% of aluminum grades. Thermal expansion is 23.2 µm/m·K (12.9 µin/in·°F).
Electrical3
4015 conducts electricity at 43 % IACS, better than 83% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (64/100), better than 70% of aluminum grades.
Sustainability4
Producing a kilogram of 4015 takes about 200 MJ of energy and emits 12.5 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 35%.
Manufacturability8
4015's machinability is poor (32/100, worse than 89% of aluminum grades); weldability excellent (88/100); formability excellent (90/100).
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. 4015 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 4015
Is 4015 easy to machine?
Gummy in O/H1x tempers — use sharp polished-flute carbide, high rake, high speed and flood coolant; the ~2% Si adds mild tool abrasion, chip breaking is poor.
Can 4015 be welded?
Excellent for GTAW/GMAW/resistance welding with 4043 or 4047 filler; no hot-cracking issues, but weld and braze zones return to near-O strength.
Can 4015 be formed, bent or molded?
O and H1x2 tempers deep-draw and roll-form well; work-hardens quickly so interstage anneal at 340–400 °C for severe draws, and Mn dispersoids prevent coarse post-braze grain.
4015 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 |
|---|---|---|
| Siprimary strengthening/brazing-compatible addition | 1.4 – 2.2 | 1.8 |
| Feimpurity limit | ≤ 0.7 | 0.35 |
| Cukept low for corrosion resistance | ≤ 0.2 | 0.05 |
| Mndispersoid former; controls post-braze grain size | 0.6 – 1.2 | 0.9 |
| Mglimited for CAB (NOCOLOK) brazing compatibility | ≤ 0.5 | 0.15 |
| Zn | ≤ 0.2 | 0.05 |
| Tigrain refiner residue | ≤ 0.1 | 0.02 |
| Others (each) | ≤ 0.05 | |
| Others (total) | ≤ 0.15 | |
| Al | balance |
What surface finishes work on 4015?
Chromate-free (Ti/Zr) conversion coating or painting is standard on heat-exchanger parts; anodizing is protective but grey/dark due to Si, so avoid for decorative bright finishes.
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 4015 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- A94015
- EN / DIN / Werkstoff-Nr.
- AW-4015AlSi2Mn
How much does 4015 cost?
4015 is a premium-cost aluminum ($$$), cheaper than about 51% 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.
4015 — frequently asked
What is 4015 used for?
4015 is typically used for brazing sheet core stock, heat exchanger tubing and fin stock. In short: weldable brazing-sheet core; best formability in family; fine post-braze grain structure.
What is the yield strength of 4015?
4015 has a typical yield strength of 55 MPa (7.98 ksi) and a tensile strength of 120 MPa (17.4 ksi) — weaker than 94% of aluminum grades. Strength varies by condition: see the 10 listed tempers.
Is 4015 easy to machine?
Not especially — machinability is rated poor (32/100, worse than 89% of aluminum grades). Gummy in O/H1x tempers — use sharp polished-flute carbide, high rake, high speed and flood coolant; the ~2% Si adds mild tool abrasion, chip breaking is poor.
Can 4015 be welded?
Yes — weldability is rated excellent (88/100). Excellent for GTAW/GMAW/resistance welding with 4043 or 4047 filler; no hot-cracking issues, but weld and braze zones return to near-O strength.
What surface finishes work on 4015?
Chromate-free (Ti/Zr) conversion coating or painting is standard on heat-exchanger parts; anodizing is protective but grey/dark due to Si, so avoid for decorative bright finishes.
Can 4015 be formed, bent or molded?
O and H1x2 tempers deep-draw and roll-form well; work-hardens quickly so interstage anneal at 340–400 °C for severe draws, and Mn dispersoids prevent coarse post-braze grain.
What is the maximum service temperature of 4015?
4015 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 4015-O and 4015-H18?
O is the default condition — default supply condition for brazing-sheet core and deep-drawn parts; maximum formability, lowest strength. H18: maximum as-rolled strength and flatness for fin/tube stock that is formed only by roll-forming, then softened by brazing. Yield strength is 55 MPa in O versus 180 MPa in H18.
How much does 4015 cost?
4015 is a premium-cost aluminum ($$$), cheaper than about 51% 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
- International Alloy Designations and Chemical Composition Limits for Wrought Aluminum (Teal Sheets) — The Aluminum Association (2018)
- EN 573-3 Aluminium and aluminium alloys — Chemical composition of wrought products — CEN (2019)
- EN 485-2 Aluminium and aluminium alloys — Sheet, strip and plate: Mechanical properties — CEN (2016)
- ASM Handbook Vol. 2: Properties and Selection — Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B: Corrosion — Materials — ASM International (2005)
- Aluminium brazing sheet core alloy data (CAB heat-exchanger materials) — Constellium / Gränges (typical producer literature) (2022)
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.