Nickel Alloy BNi-11 AS-BRAZED
Heat-treated state
UNS N99624 · ISO B-Ni11
Baseline joint condition straight out of the braze cycle — highest hardness, most boride network, lowest ductility.
Values for the AS-BRAZED 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 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-BRAZEDThis page 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 |
What is BNi-11 AS-BRAZED?
BNi-11 AS-BRAZED is BNi-11 heat treated to AS-BRAZED — baseline joint condition straight out of the braze cycle — highest hardness, most boride network, lowest ductility. The elastic modulus is 205 GPa (29.7 Msi). BNi-11 AS-BRAZED 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).
Limitations
- Difficult to machine — 3/100, worse than 100% of nickel alloy grades
- Difficult to weld — 5/100, worse than 99% of nickel alloy grades
- Needs corrosion protection — 55/100, worse than 92% of nickel alloy grades
- Hard to polish — 60/100, worse than 84% of nickel alloy grades
BNi-11 AS-BRAZED properties
Typical room-temperature values for BNi-11 AS-BRAZED; 21 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 AS-BRAZED 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 205 GPa (29.7 Msi).
Thermal6
BNi-11 AS-BRAZED is rated for continuous service to 980°C (1,796 °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).
Electrical2
BNi-11 AS-BRAZED has an electrical resistivity of 1.15×10⁻⁶ Ω·m.
Chemical & Environmental2
Corrosion resistance is good (55/100), worse than 92% of nickel alloy grades.
Sustainability3
Producing a kilogram of BNi-11 AS-BRAZED 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 AS-BRAZED's machinability is not recommended (3/100, worse than 100% of nickel alloy grades); weldability not recommended (5/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with BNi-11 AS-BRAZED
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.
| 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 | — |
BNi-11 AS-BRAZED — frequently asked
What is BNi-11 AS-BRAZED used for?
BNi-11 AS-BRAZED 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 AS-BRAZED easy to machine?
Not especially — machinability is rated not recommended (3/100, worse than 100% of nickel alloy grades). Solidified braze deposit is boride-hardened and essentially unmachinable — finish by grinding, EDM or abrasive blending only.
Can BNi-11 AS-BRAZED be welded?
Not readily — weldability is rated not recommended (5/100). 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 AS-BRAZED?
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 AS-BRAZED 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 AS-BRAZED?
BNi-11 AS-BRAZED 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.