Nickel Alloy BNi-10
UNS N99622 · ISO B-Ni10
BNi-10 (UNS N99622) is a nickel-base brazing filler with tungsten and molybdenum additions that raise high-temperature strength in the joint.
Reference datasheet — BNi-10 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-10 tempers and conditions
BNi-10 is supplied in 2 conditions, soft to hard.
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As-brazed joint (vacuum, 1149–1204 °C) | Reference condition for joint design data straight out of the vacuum furnace without post-braze diffusion cycle. | 500 | 550 | 1 | 47 HRC | 1.6 % IACS |
Brazed + diffusion heat treated | Pick when a post-braze diffusion/solution cycle is used to break up centreline borides and raise joint ductility and creep life. | 540 | 650 | 2.5 | 40 HRC | 1.8 % IACS |
Supply forms, finishes and certifications
Ways BNi-10 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/gel for dispensing | Printing process |
SINT-PREFORM | Pre-sintered preform | Printing process |
TAPE | Transfer tape / flexible preform sheet | Printing process |
PDefault | Atomized powder | Supply option |
What is BNi-10?
BNi-10 (UNS N99622) is a nickel-base brazing filler with tungsten and molybdenum additions that raise high-temperature strength in the joint. Density is 9.1 g/cm³ and the alloy melts at 971 °C; it is supplied only as powder, paste, tape or pre-sintered preform because the high B, Si and C content prevents wire drawing or rolling. Engineers use it for wide-gap brazing and structural repair of turbine hardware, brazed at 1149–1204 °C in high vacuum or dry hydrogen. The boride-hardened deposit is effectively unmachinable (machinability score 5) and cannot be fusion welded; BNi-11 is the closest wide-gap alternative. BNi-10 has a density of 9.1 g/cm³ (0.329 lb/in³), heavier than 94% of nickel alloy grades. It melts at 971°C (1,780 °F). BNi-10 has a tensile strength of 550 MPa (79.8 ksi), weaker than 77% of nickel alloy grades. Elongation at break is 1% and the elastic modulus is 200 GPa (29 Msi).
What is BNi-10 used for?
- wide-gap turbine component brazing
- superalloy repair
- high-temperature structural joints
Advantages
- Conducts heat well — 20 W/m·K (11.6 BTU/hr·ft·°F), better than 87% of nickel alloy grades
Limitations
- Difficult to machine — 5/100, worse than 99% of nickel alloy grades
- Limited ductility — 1%, worse than 98% of nickel alloy grades
- Difficult to weld — 10/100, worse than 94% of nickel alloy grades
- High embodied carbon — 16 kg CO₂/kg, worse than 93% of nickel alloy grades
- Needs corrosion protection — 55/100, worse than 92% of nickel alloy grades
BNi-10 properties
Typical room-temperature values; bars are the position among nickel alloy grades.
Physical3
BNi-10 has a density of 9.1 g/cm³ (0.329 lb/in³), heavier than 94% of nickel alloy grades. It melts at 971°C (1,780 °F).
Mechanical7
BNi-10 has a tensile strength of 550 MPa (79.8 ksi), weaker than 77% of nickel alloy grades. Elongation at break is 1% and the elastic modulus is 200 GPa (29 Msi).
Thermal5
BNi-10 is rated for continuous service to 980°C (1,796 °F). It conducts heat at 20 W/m·K (11.6 BTU/hr·ft·°F), better than 87% of nickel alloy grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical2
BNi-10 has an electrical resistivity of 1.1×10⁻⁶ Ω·m.
Chemical & Environmental2
Corrosion resistance is good (55/100), worse than 92% of nickel alloy grades.
Sustainability3
Producing a kilogram of BNi-10 takes about 210 MJ of energy and emits 16 kg of CO₂ — more than 81% of nickel alloy grades. Typical recycled content is 10%.
Manufacturability3
BNi-10's machinability is not recommended (5/100, worse than 99% of nickel alloy grades); weldability not recommended (10/100).
Common Calculations4
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-10 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with BNi-10
Is BNi-10 easy to machine?
Solidified BNi-10 is boride-hardened and effectively unmachinable by turning/milling — dress fillets by grinding, EDM or belt finishing.
Can BNi-10 be welded?
Not a weldable structural alloy; do not fusion weld the braze deposit (hot cracking) — remachine and re-braze instead.
Can BNi-10 be formed, bent or molded?
Supplied only as powder, paste, tape or pre-sintered preform because the high B/Si/C content makes wire drawing or rolling impossible.
BNi-10 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 | 10 – 13 | 11.5 |
| Wprovides high-temperature strength | 15 – 17 | 16 |
| Bmelting-point depressant; diffuses into base metal | 2.75 – 3.5 | 3.1 |
| Si | 3 – 4 | 3.5 |
| Fe | 2.5 – 4.5 | 3.5 |
| C | 0.4 – 0.55 | 0.47 |
| P | ≤ 0.02 | |
| S | ≤ 0.02 | |
| Al | ≤ 0.05 | |
| Ti | ≤ 0.05 | |
| Zr | ≤ 0.05 | |
| Others (total)max, per AWS A5.8 | ≤ 0.5 | |
| Nibalance, ~62–66 % | balance |
What surface finishes work on BNi-10?
Braze in high vacuum (10⁻⁴ mbar) or dry hydrogen at 1149–1204 °C with 0.05–0.10 mm gap (or blended preform for wide gaps); no flux, and avoid plating over unfinished fillets.
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-10 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- N99622
- ISO
- B-Ni10
How much does BNi-10 cost?
BNi-10 is a high-cost nickel alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
BNi-10 — frequently asked
What is BNi-10 used for?
BNi-10 is typically used for wide-gap turbine component brazing, superalloy repair and high-temperature structural joints. In short: W- and Mo-strengthened braze filler; wide-gap superalloy repair; preform and paste forms only.
What is the tensile strength of BNi-10?
BNi-10 has a typical tensile strength of 550 MPa (79.8 ksi) — weaker than 77% of nickel alloy grades. Strength varies by condition: see the 2 listed tempers.
Is BNi-10 easy to machine?
Not especially — machinability is rated not recommended (5/100, worse than 99% of nickel alloy grades). Solidified BNi-10 is boride-hardened and effectively unmachinable by turning/milling — dress fillets by grinding, EDM or belt finishing.
Can BNi-10 be welded?
Not readily — weldability is rated not recommended (10/100). Not a weldable structural alloy; do not fusion weld the braze deposit (hot cracking) — remachine and re-braze instead.
What surface finishes work on BNi-10?
Braze in high vacuum (10⁻⁴ mbar) or dry hydrogen at 1149–1204 °C with 0.05–0.10 mm gap (or blended preform for wide gaps); no flux, and avoid plating over unfinished fillets.
Can BNi-10 be formed, bent or molded?
Supplied only as powder, paste, tape or pre-sintered preform because the high B/Si/C content makes wire drawing or rolling impossible.
What is the maximum service temperature of BNi-10?
BNi-10 is rated for continuous use to about 980°C (1,796 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does BNi-10 cost?
BNi-10 is a high-cost nickel alloy ($$$$), 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 A5.8M/A5.8 — Specification for Filler Metals for Brazing and Braze Welding — American Welding Society (2019)
- ASME BPVC Section II Part C, SFA-5.8 — ASME (2023)
- ASM Handbook Vol. 6 — Welding, Brazing and Soldering (Nickel-base brazing filler metals) — ASM International (1993)
- Nickel braze powder/paste datasheets (Ni-Cr-W-B-Si wide-gap grades) — Various braze filler producers (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.