Aluminum 4115
AA 4115 · EN AW-4115, AlSi2MnMgCu
4115 is a higher-strength Al-Si-Mn-Mg-Cu wrought alloy (EN AW-4115, AlSi2MnMgCu) rolled as brazing sheet core in O, H12–H18 and H26 tempers.
Reference datasheet — 4115 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
4115 tempers and conditions
4115 is supplied in 6 conditions, soft to hard. O is the default FabDigit quotes; the values on this page are for it.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ODefault Annealed | Choose for deep-drawn or heavily formed brazing-sheet parts (tubes, header plates) where maximum formability before the braze cycle is needed. | 55 | 130 | 25 | 38 HB | 44 % IACS |
Strain hardened, quarter hard | Light cold work for slightly stiffer sheet that still bends and draws easily before brazing. | 130 | 160 | 10 | 45 HB | 43 % IACS |
Strain hardened, half hard | The usual as-supplied condition for stamped heat-exchanger plates and fin/tube stock — good stiffness with workable ductility. | 155 | 180 | 8 | 50 HB | 43 % IACS |
Strain hardened and partially annealed, three-quarter hard | Stabilised/partially annealed route to near-H16 strength with better ductility and flatness for formed brazing-sheet components. | 165 | 195 | 7 | 54 HB | 43 % IACS |
Strain hardened, three-quarter hard | Higher-strength coil for roll-formed tube and fin where only gentle bending is required. | 180 | 200 | 5 | 56 HB | 42 % IACS |
Strain hardened, full hard | Maximum pre-braze strength and stiffness; use for thin fin stock or where sagging resistance during the braze cycle matters. | 205 | 225 | 4 | 62 HB | 42 % IACS |
What is 4115?
4115 is a higher-strength Al-Si-Mn-Mg-Cu wrought alloy (EN AW-4115, AlSi2MnMgCu) rolled as brazing sheet core in O, H12–H18 and H26 tempers. It is used where post-braze mechanical strength must exceed that of a standard 3000-series core: default values are 130 MPa tensile, 55 MPa yield, 25% elongation, 38 HB, 175 W/m·K, 44% IACS, a 200 °C service limit and a formability score of 90. The Cu addition lowers corrosion resistance (score 47), so a sacrificial clad layer or coating is needed, and with a solidus near 600 °C and weldability of 55 it is joined by brazing rather than fusion welding. Where corrosion resistance outranks strength, use 4015. 4115 has a density of 2.71 g/cm³ (0.0979 lb/in³), heavier than 51% of aluminum grades. It melts at 600°C (1,112 °F). 4115 has a yield strength of 55 MPa (7.98 ksi) and a tensile strength of 130 MPa (18.9 ksi) — weaker than 94% of aluminum grades. Elongation at break is 25% and the elastic modulus is 70 GPa (10.2 Msi).
What is 4115 used for?
- High-strength brazing sheet core
- Automotive heat exchanger tanks and headers
- Radiator and condenser tube plate
- Charge-air cooler side plates
- Stamped and roll-formed brazing sheet components
Advantages
- Ductile — tolerates forming and impact — 25%, better than 94% of aluminum grades
- Forms and bends easily — 90/100, better than 93% of aluminum grades
- High service temperature — 200°C (392 °F), better than 90% of aluminum grades
- Conducts heat well — 175 W/m·K (101.1 BTU/hr·ft·°F), better than 85% of aluminum grades
- High electrical conductivity — 44 % IACS, better than 85% of aluminum grades
Limitations
- Low strength — 55 MPa (7.98 ksi), worse than 94% of aluminum grades
- Hard to polish — 40/100, worse than 91% of aluminum grades
- Difficult to machine — 35/100, worse than 86% of aluminum grades
4115 properties
Typical room-temperature values for 4115-O; bars are the position among aluminum grades.
Physical3
4115 has a density of 2.71 g/cm³ (0.0979 lb/in³), heavier than 51% of aluminum grades. It melts at 600°C (1,112 °F).
Mechanical11
4115 has a yield strength of 55 MPa (7.98 ksi) and a tensile strength of 130 MPa (18.9 ksi) — weaker than 94% of aluminum grades. Elongation at break is 25% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
4115 is rated for continuous service to 200°C (392 °F). It conducts heat at 175 W/m·K (101.1 BTU/hr·ft·°F), better than 85% of aluminum grades. Thermal expansion is 22.3 µm/m·K (12.4 µin/in·°F).
Electrical3
4115 conducts electricity at 44 % IACS, better than 85% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is fair (47/100), worse than 59% of aluminum grades.
Sustainability4
Producing a kilogram of 4115 takes about 200 MJ of energy and emits 12 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 30%.
Manufacturability8
4115's machinability is fair (35/100, worse than 86% of aluminum grades); weldability good (55/100); 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. 4115 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 4115
Is 4115 easy to machine?
Machines like a soft Al-Mn sheet but the Si particles are abrasive — use PCD or polished-flute carbide, high speed, low feed and flood coolant to avoid built-up edge in O temper.
Can 4115 be welded?
GTAW/GMAW with 4043 filler is possible on bare core, but the ~600 °C solidus and clad braze layers mean joining is normally done by CAB (NOCOLOK) brazing rather than fusion welding.
Can 4115 be formed, bent or molded?
Excellent cold formability in O/H12; stamped and roll-formed as brazing sheet, with H14–H18 reserved for shallow forming and sag resistance during the braze cycle.
4115 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 |
|---|---|---|
| Siprincipal alloying addition, Al-Si2 core | 1.5 – 2.5 | 2 |
| Feimpurity limit | ≤ 0.6 | 0.3 |
| Cupost-braze age hardening | 0.1 – 0.6 | 0.3 |
| Mndispersoid strengthening / grain control | 0.5 – 1.2 | 0.9 |
| Mglimited for controlled-atmosphere (NOCOLOK) brazing | 0.05 – 0.5 | 0.2 |
| Zn | ≤ 0.25 | |
| Tigrain refiner | ≤ 0.15 | |
| Others (each)others total 0.15 max | ≤ 0.05 | |
| Alremainder; verify exact limits against current AA Teal Sheet / EN 573-3 registration | balance |
What surface finishes work on 4115?
Anodizes grey/dull because of Si; for service protection rely on the sacrificial clad layer, Zn-arc spray, chromate-free conversion coating or e-coat rather than decorative anodising or polishing.
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 4115 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- AW-4115AlSi2MnMgCu
How much does 4115 cost?
4115 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.
4115 — frequently asked
What is 4115 used for?
4115 is typically used for high-strength brazing sheet core, automotive heat exchanger tanks and headers, radiator and condenser tube plate, charge-air cooler side plates and stamped and roll-formed brazing sheet components. In short: strongest brazing-sheet core; sag-resistant during brazing; cu lowers corrosion resistance.
What is the yield strength of 4115?
4115 has a typical yield strength of 55 MPa (7.98 ksi) and a tensile strength of 130 MPa (18.9 ksi) — weaker than 94% of aluminum grades. Strength varies by condition: see the 6 listed tempers.
Is 4115 easy to machine?
Not especially — machinability is rated fair (35/100, worse than 86% of aluminum grades). Machines like a soft Al-Mn sheet but the Si particles are abrasive — use PCD or polished-flute carbide, high speed, low feed and flood coolant to avoid built-up edge in O temper.
Can 4115 be welded?
Yes — weldability is rated good (55/100). GTAW/GMAW with 4043 filler is possible on bare core, but the ~600 °C solidus and clad braze layers mean joining is normally done by CAB (NOCOLOK) brazing rather than fusion welding.
What surface finishes work on 4115?
Anodizes grey/dull because of Si; for service protection rely on the sacrificial clad layer, Zn-arc spray, chromate-free conversion coating or e-coat rather than decorative anodising or polishing.
Can 4115 be formed, bent or molded?
Excellent cold formability in O/H12; stamped and roll-formed as brazing sheet, with H14–H18 reserved for shallow forming and sag resistance during the braze cycle.
What is the maximum service temperature of 4115?
4115 is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 4115-O and 4115-H18?
O is the default condition — choose for deep-drawn or heavily formed brazing-sheet parts (tubes, header plates) where maximum formability before the braze cycle is needed. H18: maximum pre-braze strength and stiffness; use for thin fin stock or where sagging resistance during the braze cycle matters. Yield strength is 55 MPa in O versus 205 MPa in H18.
How much does 4115 cost?
4115 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 sheet, strip and plate — Mechanical properties — CEN (2016)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering (aluminium brazing sheet) — ASM International (1993)
- Aluminium brazing sheet core alloy data (heat-exchanger products) — Novelis / Constellium / Granges (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.