Nickel Alloy BNi-11
UNS N99624 · ISO B-Ni11
BNi-11 (UNS N99624) is a high-chromium, high-boron nickel brazing filler related to the BNi-10 group, used for wide-gap and diffusion brazing repairs of superalloy parts.
Reference datasheet — BNi-11 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.
BNi-11 tempers and conditions
BNi-11 is supplied in 3 conditions, soft to hard.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
BNi-11 mixed with superalloy or high-melt Ni powder | Choose for filling 0.25–2 mm gaps and crack repair in turbine blades/vanes where straight filler would erode or shrink. | 400 | 600 | 3 | 44 HRC | 1.4 % IACS |
Diffusion heat treated after brazing | Pick when joint ductility and stress-rupture life matter: long soak near braze temperature dissolves the centreline boride eutectic. | 430 | 650 | 4 | 40 HRC | 1.7 % IACS |
As-brazed joint (no diffusion cycle) | Baseline joint condition straight out of the braze cycle — highest hardness, most boride network, lowest ductility. | 480 | 520 | 1 | 54 HRC | 1.5 % IACS |
Supply forms, finishes and certifications
Ways BNi-11 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
PASTE | Powder in organic binder for dispensing/screen printing | Printing process |
POWDERDefault | Gas-atomized braze powder | Printing process |
TAPE | Transfer tape / flexible sheet preform | Printing process |
What is BNi-11?
BNi-11 (UNS N99624) is a high-chromium, high-boron nickel brazing filler related to the BNi-10 group, used for wide-gap and diffusion brazing repairs of superalloy parts. Density is 8.7 g/cm³ and the melting point is 970 °C, with furnace cycles run at roughly 1150–1205 °C in vacuum or dry hydrogen. It is supplied as powder, paste or binder-based tape and is frequently blended with high-melting superalloy powder to control shrinkage in wide joints. The as-brazed deposit is boride-hardened, crack-sensitive and cannot be machined conventionally; BNi-9 is the nearer option for narrow-gap, corrosion-driven joints. BNi-11 has a density of 8.7 g/cm³ (0.314 lb/in³), heavier than 75% of nickel alloy grades. It melts at 970°C (1,778 °F). The elastic modulus is 200 GPa (29 Msi).
What is BNi-11 used for?
- Turbine blade repair brazing
- Wide-gap diffusion brazing of superalloys
- Vane segment crack filling
- Shroud and platform build-up
- Hot-section component overhaul
- Diffusion-brazed high-temperature assemblies
Advantages
- Conducts heat well — 14 W/m·K (8.09 BTU/hr·ft·°F), better than 77% of nickel alloy grades
Limitations
- Difficult to machine — 5/100, worse than 99% of nickel alloy grades
- Difficult to weld — 10/100, worse than 94% of nickel alloy grades
- Needs corrosion protection — 60/100, worse than 89% of nickel alloy grades
- Hard to polish — 60/100, worse than 84% of nickel alloy grades
BNi-11 properties
Typical room-temperature values; bars are the position among nickel alloy grades.
Physical3
BNi-11 has a density of 8.7 g/cm³ (0.314 lb/in³), heavier than 75% of nickel alloy grades. It melts at 970°C (1,778 °F).
Mechanical7
The elastic modulus is 200 GPa (29 Msi).
Thermal6
BNi-11 is rated for continuous service to 980°C (1,796 °F). It conducts heat at 14 W/m·K (8.09 BTU/hr·ft·°F), better than 77% of nickel alloy grades. Thermal expansion is 12.5 µm/m·K (6.94 µin/in·°F).
Electrical2
BNi-11 has an electrical resistivity of 1.15×10⁻⁶ Ω·m.
Chemical & Environmental2
Corrosion resistance is good (60/100), worse than 89% of nickel alloy grades.
Sustainability3
Producing a kilogram of BNi-11 takes about 190 MJ of energy and emits 14 kg of CO₂ — more than 75% of nickel alloy grades. Typical recycled content is 10%.
Manufacturability5
BNi-11's machinability is not recommended (5/100, worse than 99% of nickel alloy grades); weldability not recommended (10/100).
Common Calculations2
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 nickel alloy family
Yield strength against density for every nickel alloy grade FabDigit runs. BNi-11 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with BNi-11
Is BNi-11 easy to machine?
Solidified braze deposit is boride-hardened and essentially unmachinable — finish by grinding, EDM or abrasive blending only.
Can BNi-11 be welded?
Not a fusion filler; the braze zone is crack-sensitive, so avoid arc welding directly over a BNi-11 joint.
Can BNi-11 be formed, bent or molded?
Supplied as powder, paste or binder-based tape; wide-gap repairs use blends with high-melt superalloy powder to control shrinkage.
BNi-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 |
|---|---|---|
| Cr | 9 – 11.75 | 10.2 |
| W | 11.5 – 12.75 | 12 |
| Simelting-point depressant | 3.35 – 4.25 | 3.6 |
| Bmelting-point depressant; diffuses into base metal | 2.2 – 3 | 2.5 |
| Fe | 2.5 – 3.5 | 3 |
| C | 0.3 – 0.5 | 0.4 |
| Pimpurity limit | ≤ 0.02 | |
| Simpurity limit | ≤ 0.02 | |
| Alimpurity limit | ≤ 0.05 | |
| Tiimpurity limit | ≤ 0.05 | |
| Nibalance, plus other elements 0.50 max total | balance |
What surface finishes work on BNi-11?
Vacuum or dry-hydrogen furnace cycle at roughly 1150–1205 °C with clean, oxide-free joint faces; grit-blast and passivate afterwards, and add a diffusion soak to reduce boron segregation.
Surface treatments FabDigit runs on nickel alloy 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).
Plating
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Nickel Alloy BNi-11 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- N99624
- ISO
- B-Ni11
How much does BNi-11 cost?
BNi-11 is a high-cost nickel alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
BNi-11 — frequently asked
What is BNi-11 used for?
BNi-11 is typically used for turbine blade repair brazing, wide-gap diffusion brazing of superalloys, vane segment crack filling, shroud and platform build-up, hot-section component overhaul and diffusion-brazed high-temperature assemblies. In short: high-boron wide-gap braze alloy; diffusion brazing of superalloys; blends with superalloy powder.
Is BNi-11 easy to machine?
Not especially — machinability is rated not recommended (5/100, worse than 99% of nickel alloy grades). Solidified braze deposit is boride-hardened and essentially unmachinable — finish by grinding, EDM or abrasive blending only.
Can BNi-11 be welded?
Not readily — weldability is rated not recommended (10/100). Not a fusion filler; the braze zone is crack-sensitive, so avoid arc welding directly over a BNi-11 joint.
What surface finishes work on BNi-11?
Vacuum or dry-hydrogen furnace cycle at roughly 1150–1205 °C with clean, oxide-free joint faces; grit-blast and passivate afterwards, and add a diffusion soak to reduce boron segregation.
Can BNi-11 be formed, bent or molded?
Supplied as powder, paste or binder-based tape; wide-gap repairs use blends with high-melt superalloy powder to control shrinkage.
What is the maximum service temperature of BNi-11?
BNi-11 is rated for continuous use to about 980°C (1,796 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does BNi-11 cost?
BNi-11 is a high-cost nickel alloy ($$$$), 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
- AWS A5.8/A5.8M — Specification for Filler Metals for Brazing and Braze Welding — American Welding Society (2019)
- ASM Handbook Vol. 6 — Welding, Brazing, and Soldering (Nickel-base brazing filler metals) — ASM International (1993)
- GB/T 10859 (2008)
- High-temperature nickel braze powder / paste / transfer tape datasheets (Nicrobraz-type Ni-Cr-W-B-Si) — Wall Colmonoy / Lucas-Milhaupt / Höganäs (2023)
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.