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Nickel Alloy BNi-11 WIDE-GAP

Grade

UNS N99624 · ISO B-Ni11

Choose for filling 0.25–2 mm gaps and crack repair in turbine blades/vanes where straight filler would erode or shrink.

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Request a quote in BNi-11 WIDE-GAPBNi-11 overview

Values for the WIDE-GAP condition

Other BNi-11 tempers and conditions

BNi-11 is listed in 3 conditions; see the grade overview at BNi-11.

Compare all 3 conditionsHide
Condition · open for datasheetBest forYield MPaTensile MPaElong. %HardnessConductivity
WIDE-GAPThis page
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.400600344 HRC1.4 % IACS
DIFF
Diffusion heat treated after brazing
Pick when joint ductility and stress-rupture life matter: long soak near braze temperature dissolves the centreline boride eutectic.430650440 HRC1.7 % IACS
AS-BRAZED
As-brazed joint (no diffusion cycle)
Baseline joint condition straight out of the braze cycle — highest hardness, most boride network, lowest ductility.480520154 HRC1.5 % IACS

What is BNi-11 WIDE-GAP?

BNi-11 WIDE-GAP is BNi-11 in the WIDE-GAP grade — choose for filling 0.25–2 mm gaps and crack repair in turbine blades/vanes where straight filler would erode or shrink. The elastic modulus is 205 GPa (29.7 Msi). BNi-11 WIDE-GAP 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).

Advantages

  • High service temperature — 1,010°C (1,850 °F), better than 82% of nickel alloy grades

Limitations

  • Difficult to weld — 8/100, worse than 99% of nickel alloy grades
  • Difficult to machine — 8/100, worse than 96% of nickel alloy grades
  • Needs corrosion protection — 62/100, worse than 87% of nickel alloy grades
  • Hard to polish — 60/100, worse than 84% of nickel alloy grades

BNi-11 WIDE-GAP properties

Typical room-temperature values for BNi-11 WIDE-GAP; 22 are specific to this condition. Other listed values are BNi-11 reference data and may not represent this condition. Bars are the position among nickel alloy grades.

Physical3

BNi-11 WIDE-GAP 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).

Density8.7 g/cm³0.31 lb/in³
Melting Point (Solidus)970°C1,778 °F
Liquidus Temperature1,095°C2,003 °F

Mechanical7

The elastic modulus is 205 GPa (29.7 Msi).

Elastic (Young's) Modulus205 GPa29.7 Msi
Shear Modulus77 GPa11.2 Msi
Bulk Modulus167 GPa24.2 Msi
Poisson's Ratio0.3
Shear Strength280 MPa40.6 ksi
Hardness, Rockwell C44 HRC
Hardness, Vickers435 HV

Thermal6

BNi-11 WIDE-GAP is rated for continuous service to 1,010°C (1,850 °F). It conducts heat at 13 W/m·K (7.51 BTU/hr·ft·°F), better than 71% of nickel alloy grades. Thermal expansion is 12.5 µm/m·K (6.94 µin/in·°F).

Thermal Conductivity13 W/m·K7.5 BTU/hr·ft·°F
Specific Heat Capacity460 J/kg·K0.11 BTU/lb·°F
Thermal Expansion (CTE, 20–100 °C)12.5 µm/m·K6.9 µin/in·°F
Latent Heat of Fusion255 J/g110 BTU/lb
Max Service Temperature (continuous)1,010°C1,850 °F
Min Service Temperature-195°C-319 °F

Electrical2

BNi-11 WIDE-GAP has an electrical resistivity of 1.23×10⁻⁶ Ω·m.

Electrical Resistivity1.23×10⁻⁶ Ω·m48.4 µΩ·in
Magnetic Responsenon-magnetic to weakly magnetic (austenitic Ni matrix with boride phases)

Chemical & Environmental2

Corrosion resistance is good (62/100), worse than 87% of nickel alloy grades.

Corrosion ResistanceGood62/100
Chemical Resistance SummaryGood oxidation resistance to ~1000 °C in air and good resistance to hot combustion gases; the boride/carbide network is attacked by strong oxidizing acids and by molten salts/sulfidizing atmospheres.

Sustainability3

Producing a kilogram of BNi-11 WIDE-GAP takes about 190 MJ of energy and emits 14 kg of CO₂ — more than 75% of nickel alloy grades. Typical recycled content is 10%.

Embodied Energy (primary production)190 MJ/kg81,685 BTU/lb
Embodied Carbon (primary production)14 kg CO₂/kg
Typical Recycled Content10%

Manufacturability5

BNi-11 WIDE-GAP's machinability is not recommended (8/100, worse than 96% of nickel alloy grades); weldability not recommended (8/100).

MachinabilityNot recommended8/100
WeldabilityNot recommended8/100
CastabilityPoor30/100
Brazeability / SolderabilityExcellent95/100
PolishabilityGood60/100

Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.

Working with BNi-11 WIDE-GAP

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.

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.

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.

ElementSpec limit (wt %)Nominal
Cr9 – 11.7510.2
W11.5 – 12.7512
Simelting-point depressant3.35 – 4.253.6
Bmelting-point depressant; diffuses into base metal2.2 – 32.5
Fe2.5 – 3.53
C0.3 – 0.50.4
Pimpurity limit≤ 0.02—
Simpurity limit≤ 0.02—
Alimpurity limit≤ 0.05—
Tiimpurity limit≤ 0.05—
Nibalance, plus other elements 0.50 max totalbalance—

BNi-11 WIDE-GAP — frequently asked

What is BNi-11 WIDE-GAP used for?

BNi-11 WIDE-GAP 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 WIDE-GAP easy to machine?

Not especially — machinability is rated not recommended (8/100, worse than 96% of nickel alloy grades). Solidified braze deposit is boride-hardened and essentially unmachinable — finish by grinding, EDM or abrasive blending only.

Can BNi-11 WIDE-GAP be welded?

Not readily — weldability is rated not recommended (8/100). 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 WIDE-GAP?

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 WIDE-GAP 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 WIDE-GAP?

BNi-11 WIDE-GAP is rated for continuous use to about 1,010°C (1,850 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.

Sources

  1. AWS A5.8/A5.8M — Specification for Filler Metals for Brazing and Braze Welding — American Welding Society (2019)
  2. ASM Handbook Vol. 6 — Welding, Brazing, and Soldering (Nickel-base brazing filler metals) — ASM International (1993)
  3. GB/T 10859 (2008)
  4. 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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.