Aluminum BAlSi-11-H14
Temper
ASTM AWS A5.8 BAlSi-11
H14 = strain hardened, half hard
Choose when the filler is rolled as the clad layer of vacuum brazing sheet or supplied as stiffer strip for stamped preforms.
Values for the H14 condition
Other BAlSi-11 tempers and conditions
BAlSi-11 is listed in 3 conditions; see the grade overview at BAlSi-11.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Choose for hand-fed rod, coiled wire and rolled foil preform stock supplied soft for easy shaping. | 65 | 145 | 8 | 50 HB | 38 % IACS |
AS-BRAZEDDefault filler deposit after vacuum/flux-free braze cycle | Default condition: properties of the solidified fillet/joint after a 588–604 °C vacuum braze cycle. | 90 | 170 | 3 | 60 HB | 37 % IACS |
H14This page Strain hardened, half hard | Choose when the filler is rolled as the clad layer of vacuum brazing sheet or supplied as stiffer strip for stamped preforms. | 150 | 195 | 3 | 70 HB | 37 % IACS |
What is BAlSi-11-H14?
BAlSi-11-H14 is BAlSi-11 in the H14 temper — choose when the filler is rolled as the clad layer of vacuum brazing sheet or supplied as stiffer strip for stamped preforms. BAlSi-11-H14 has a yield strength of 150 MPa (21.8 ksi) and a tensile strength of 195 MPa (28.3 ksi) — weaker than 65% of aluminum grades. Elongation at break is 3% and the elastic modulus is 71 GPa (10.3 Msi). BAlSi-11-H14 has a density of 2.66 g/cm³ (0.0961 lb/in³), lighter than 84% of aluminum grades. It melts at 559°C (1,038 °F). AS-BRAZED is the default condition FabDigit quotes; H14 is available on request or by drawing note.
Limitations
- Hard to polish — 35/100, worse than 98% of aluminum grades
- Low fracture toughness — 17 MPa·√m (15.5 ksi·√in), worse than 83% of aluminum grades
- Limited ductility — 3%, worse than 79% of aluminum grades
- Limited service temperature — 120°C (248 °F), worse than 79% of aluminum grades
BAlSi-11-H14 properties
Typical room-temperature values for BAlSi-11-H14; 18 are specific to this condition. Other listed values are BAlSi-11 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
BAlSi-11-H14 has a density of 2.66 g/cm³ (0.0961 lb/in³), lighter than 84% of aluminum grades. It melts at 559°C (1,038 °F).
Mechanical15
BAlSi-11-H14 has a yield strength of 150 MPa (21.8 ksi) and a tensile strength of 195 MPa (28.3 ksi) — weaker than 65% of aluminum grades. Elongation at break is 3% and the elastic modulus is 71 GPa (10.3 Msi).
Thermal6
BAlSi-11-H14 is rated for continuous service to 120°C (248 °F). It conducts heat at 130 W/m·K (75.1 BTU/hr·ft·°F), worse than 65% of aluminum grades. Thermal expansion is 21 µm/m·K (11.7 µin/in·°F).
Electrical3
BAlSi-11-H14 conducts electricity at 37 % IACS, better than 58% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is fair (53/100), worse than 55% of aluminum grades.
Sustainability4
Producing a kilogram of BAlSi-11-H14 takes about 205 MJ of energy and emits 12.5 kg of CO₂ — more than 76% of aluminum grades. Typical recycled content is 10%.
Manufacturability8
BAlSi-11-H14's machinability is fair (45/100, worse than 72% of aluminum grades); weldability poor (30/100); formability poor (30/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with BAlSi-11-H14
Is BAlSi-11 easy to machine?
Rarely machined as a bulk product; braze fillets are abrasive from primary Si — use sharp polished-flute carbide, high speed and generous lubricant to avoid smearing.
Can BAlSi-11 be welded?
Not a structural welding filler — the high Mg plus Bi content is intended for brazing; arc welding of the deposit causes Mg loss and porosity.
Can BAlSi-11 be formed, bent or molded?
Supplied as rolled foil/clad layer or drawn wire; anneal between passes since the near-eutectic Si structure work-hardens and cracks quickly in cold forming.
What surface finishes work on BAlSi-11?
Anodizes dark and blotchy because of the Si and Bi phases; for cosmetic assemblies use chemical conversion coating or paint rather than clear anodize.
BAlSi-11 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 |
|---|---|---|
| Simelting-point depressant, near-eutectic flow | 9 – 10.5 | 9.8 |
| Mgoxide-disrupting getter for vacuum brazing | 1 – 2 | 1.5 |
| Bilowers surface tension, improves flow without flux | 0.02 – 0.2 | 0.1 |
| Feimpurity limit | ≤ 0.8 | — |
| Cuimpurity limit | ≤ 0.25 | — |
| Mnimpurity limit | ≤ 0.1 | — |
| Znimpurity limit | ≤ 0.2 | — |
| Others (each) | ≤ 0.05 | — |
| Others (total) | ≤ 0.15 | — |
| Al | balance | — |
BAlSi-11-H14 — frequently asked
What is BAlSi-11-H14 used for?
BAlSi-11-H14 is typically used for flux-free vacuum brazing of aluminum assemblies, specialty heat exchanger cores, brazing preforms and rings, clad foil layers on brazing sheet, vacuum-brazed cold plates and manifolds and powder and paste braze deposits. In short: bismuth-modified vacuum braze filler; no flux required; low-ductility brittle deposit.
What is the yield strength of BAlSi-11-H14?
BAlSi-11-H14 has a typical yield strength of 150 MPa (21.8 ksi) and a tensile strength of 195 MPa (28.3 ksi) — weaker than 65% of aluminum grades. Strength varies by condition: see the 3 listed tempers.
Is BAlSi-11-H14 easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 72% of aluminum grades). Rarely machined as a bulk product; braze fillets are abrasive from primary Si — use sharp polished-flute carbide, high speed and generous lubricant to avoid smearing.
Can BAlSi-11-H14 be welded?
Not readily — weldability is rated poor (30/100). Not a structural welding filler — the high Mg plus Bi content is intended for brazing; arc welding of the deposit causes Mg loss and porosity.
What surface finishes work on BAlSi-11-H14?
Anodizes dark and blotchy because of the Si and Bi phases; for cosmetic assemblies use chemical conversion coating or paint rather than clear anodize.
Can BAlSi-11-H14 be formed, bent or molded?
Supplied as rolled foil/clad layer or drawn wire; anneal between passes since the near-eutectic Si structure work-hardens and cracks quickly in cold forming.
What is the maximum service temperature of BAlSi-11-H14?
BAlSi-11-H14 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 BAlSi-11 AS-BRAZED and BAlSi-11-H14?
AS-BRAZED is the default condition — default condition: properties of the solidified fillet/joint after a 588–604 °C vacuum braze cycle. H14: choose when the filler is rolled as the clad layer of vacuum brazing sheet or supplied as stiffer strip for stamped preforms. Yield strength is 90 MPa in AS-BRAZED versus 150 MPa in H14.
Sources
- AWS A5.8/A5.8M — Specification for Filler Metals for Brazing and Braze Welding — American Welding Society (2019)
- AWS Brazing Handbook, 5th ed. — Aluminum and Aluminum Alloys — American Welding Society (2007)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering — ASM International (1993)
- International Alloy Designations and Chemical Composition Limits for Wrought Aluminum (Teal Sheets) — The Aluminum Association (2018)
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.