Aluminum 4147
AA 4147 · EN AW-4147, AlSi11Cu3
4147 is a high-silicon, copper-modified Al-Si brazing filler (EN AW-4147, AlSi11Cu3) supplied as wire, rod, foil and cladding in O, F, H14 and as-brazed condition.
Reference datasheet — 4147 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
4147 tempers and conditions
4147 is supplied in 4 conditions, soft to hard. O is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ODefault Annealed | Standard soft-drawn/annealed condition for brazing wire, preforms, foil and brazing-sheet cladding; pick it for any brazing consumable. | 60 | 130 | 15 | 45 HB | 40 % IACS |
As fabricated | As-cast ingot or as-extruded rod with no thermal or mechanical control; used for remelt stock and powder/paste feedstock. | 90 | 170 | 6 | 55 HB | 39 % IACS |
solidified filler in the joint | Condition of the filler after it has melted and resolidified in a joint; use these numbers for joint strength checks, not the wire properties. | 90 | 160 | 3 | 55 HB | 37 % IACS |
Strain hardened, half hard | Cold-drawn stiffer wire chosen when spooled or hand-fed rod must resist bending during automated brazing; values are indicative only. | 140 | 175 | 5 | 60 HB | 40 % IACS |
What is 4147?
4147 is a high-silicon, copper-modified Al-Si brazing filler (EN AW-4147, AlSi11Cu3) supplied as wire, rod, foil and cladding in O, F, H14 and as-brazed condition. The Cu addition widens the melting range, which suits furnace and torch brazing of aluminum assemblies where joint gaps vary. Reference values are 130 MPa tensile, 60 MPa yield, 15% elongation, 45 HB, 155 W/m·K, 40% IACS and a 150 °C service limit, with low formability (35) and abrasive machining behaviour (32). For flux-free controlled-atmosphere brazing, use 4104 instead. 4147 has a density of 2.67 g/cm³ (0.0965 lb/in³), lighter than 78% of aluminum grades. It melts at 560°C (1,040 °F). 4147 has a yield strength of 60 MPa (8.7 ksi) and a tensile strength of 130 MPa (18.9 ksi) — weaker than 93% of aluminum grades. Elongation at break is 15% and the elastic modulus is 71 GPa (10.3 Msi).
What is 4147 used for?
- furnace brazing
- torch brazing
- aluminum assembly joining
Advantages
- Ductile — tolerates forming and impact — 15%, better than 82% of aluminum grades
Limitations
- Low strength — 60 MPa (8.7 ksi), worse than 93% of aluminum grades
- Hard to polish — 40/100, worse than 91% of aluminum grades
- Difficult to machine — 32/100, worse than 89% of aluminum grades
4147 properties
Typical room-temperature values for 4147-O; bars are the position among aluminum grades.
Physical3
4147 has a density of 2.67 g/cm³ (0.0965 lb/in³), lighter than 78% of aluminum grades. It melts at 560°C (1,040 °F).
Mechanical12
4147 has a yield strength of 60 MPa (8.7 ksi) and a tensile strength of 130 MPa (18.9 ksi) — weaker than 93% of aluminum grades. Elongation at break is 15% and the elastic modulus is 71 GPa (10.3 Msi).
Thermal6
4147 is rated for continuous service to 150°C (302 °F). It conducts heat at 155 W/m·K (89.6 BTU/hr·ft·°F), better than 71% of aluminum grades. Thermal expansion is 20 µm/m·K (11.1 µin/in·°F).
Electrical3
4147 conducts electricity at 40 % IACS, better than 72% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 51% of aluminum grades.
Sustainability4
Producing a kilogram of 4147 takes about 200 MJ of energy and emits 12 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 25%.
Manufacturability8
4147's machinability is poor (32/100, worse than 89% of aluminum grades); weldability fair (50/100); formability fair (35/100).
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. 4147 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 4147
Is 4147 easy to machine?
Machinable but abrasive — use PCD or polished carbide, high speed, low feed and flood coolant; primary silicon dulls HSS quickly and gives a matte finish.
Can 4147 be welded?
Intended as a filler, not a base metal: it flows freely and resists hot cracking in Al-Si and Al-Mg-Si joints, but a resolidified bead is brittle and should not be bent or post-formed.
Can 4147 be formed, bent or molded?
Very limited cold formability; keep to wire drawing, foil rolling and cladding on brazing sheet, with interstage anneals, and avoid tight bends or deep forming.
4147 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 |
|---|---|---|
| Sinear-eutectic; sets the low melting range | 11 – 13 | 12 |
| Mgoxide getter for fluxless vacuum brazing; incompatible with NOCOLOK CAB flux | 0.1 – 0.5 | 0.3 |
| Feimpurity limit | ≤ 0.8 | |
| Cuimpurity limit | ≤ 0.25 | |
| Mnimpurity limit | ≤ 0.1 | |
| Znimpurity limit | ≤ 0.2 | |
| Others (each)others total 0.15 max | ≤ 0.05 | |
| Al | balance |
What surface finishes work on 4147?
Chemical conversion coating, chromate-free pretreatment or paint over brazed seams; anodizing turns high-Si filler dark grey and blotchy, and Mg-bearing joints must be cleaned of flux/oxide residue before finishing.
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 4147 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- AW-4147AlSi11Cu3
- Also called
- BAlSi-9
How much does 4147 cost?
4147 is a high-cost aluminum ($$$$), pricier than about 78% 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.
4147 — frequently asked
What is 4147 used for?
4147 is typically used for furnace brazing, torch brazing and aluminum assembly joining. In short: wide melting range filler; free-flowing braze alloy; brittle after resolidification.
What is the yield strength of 4147?
4147 has a typical yield strength of 60 MPa (8.7 ksi) and a tensile strength of 130 MPa (18.9 ksi) — weaker than 93% of aluminum grades. Strength varies by condition: see the 4 listed tempers.
Is 4147 easy to machine?
Not especially — machinability is rated poor (32/100, worse than 89% of aluminum grades). Machinable but abrasive — use PCD or polished carbide, high speed, low feed and flood coolant; primary silicon dulls HSS quickly and gives a matte finish.
Can 4147 be welded?
With care — weldability is rated fair (50/100). Intended as a filler, not a base metal: it flows freely and resists hot cracking in Al-Si and Al-Mg-Si joints, but a resolidified bead is brittle and should not be bent or post-formed.
What surface finishes work on 4147?
Chemical conversion coating, chromate-free pretreatment or paint over brazed seams; anodizing turns high-Si filler dark grey and blotchy, and Mg-bearing joints must be cleaned of flux/oxide residue before finishing.
Can 4147 be formed, bent or molded?
Very limited cold formability; keep to wire drawing, foil rolling and cladding on brazing sheet, with interstage anneals, and avoid tight bends or deep forming.
What is the maximum service temperature of 4147?
4147 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 4147-O and 4147-H14?
O is the default condition — standard soft-drawn/annealed condition for brazing wire, preforms, foil and brazing-sheet cladding; pick it for any brazing consumable. H14: cold-drawn stiffer wire chosen when spooled or hand-fed rod must resist bending during automated brazing; values are indicative only. Yield strength is 60 MPa in O versus 140 MPa in H14.
How much does 4147 cost?
4147 is a high-cost aluminum ($$$$), pricier than about 78% 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)
- AWS A5.8/A5.8M — Specification for Filler Metals for Brazing and Braze Welding (BAlSi series) — AWS (2019)
- EN 573-3 — Aluminium and aluminium alloys, chemical composition of wrought products — CEN (2019)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 6 — Welding, Brazing and Soldering (aluminium brazing) — ASM International (1993)
- Aluminium brazing sheet and filler alloy data (Al-Si-Mg vacuum brazing cladding) — Gränges / Aleris (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.