Nickel Alloy BNi-1
UNS N99600 · ISO B-Ni1 · also Nicrobraz 150
BNi-1 is a high-chromium Ni-Cr-B-Si brazing filler (UNS N99600, also sold as Nicrobraz 150) with high carbon and boron content, supplied as powder, paste, tape or sintered preform.
Reference datasheet — BNi-1 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.
Values for the AS-BRAZED condition
BNi-1 tempers and conditions
BNi-1 is supplied in 2 conditions, soft to hard. AS-BRAZED is the default FabDigit quotes; the values on this page are for it.
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
extended hold below solidus | Pick when boron must be diffused out of the joint centre to reduce the continuous boride network and raise joint ductility and creep life. | 480 | 620 | 3 | 43 HRC | 1.8 % IACS |
AS-BRAZEDDefault furnace-brazed joint, as-solidified | Default state of a vacuum or dry-hydrogen furnace braze at 1066–1204 °C; hard, erosion-resistant, essentially non-ductile joint. | 500 | 550 | 1 | 52 HRC | 1.6 % IACS |
Supply forms, finishes and certifications
Ways BNi-1 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 | Braze Paste | Printing process |
POWDER | Atomized Powder | Printing process |
SINT-PREFORM | Sintered Preform / Rod | Printing process |
TAPE | Transfer Tape / Flexible Sheet Preform | Printing process |
What is BNi-1?
BNi-1 is a high-chromium Ni-Cr-B-Si brazing filler (UNS N99600, also sold as Nicrobraz 150) with high carbon and boron content, supplied as powder, paste, tape or sintered preform. It is chosen for hard, erosion- and corrosion-resistant joints on stainless steels and nickel alloys brazed in vacuum or dry hydrogen at 1066–1204 °C with 0.025–0.075 mm clearances. Joints run about 52 HRC and 550 MPa tensile with only 1 % elongation, and serve to 900 °C. The deposit is brittle, effectively unmachinable (machinability score 6) and can erode thin sections by boron diffusion; BNi-1a is the lower-carbon, slightly more ductile option. BNi-1 has a density of 7.89 g/cm³ (0.285 lb/in³), lighter than 94% of nickel alloy grades. It melts at 977°C (1,791 °F). BNi-1 has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 550 MPa (79.8 ksi) — stronger than 73% of nickel alloy grades. Elongation at break is 1% and the elastic modulus is 200 GPa (29 Msi).
What is BNi-1 used for?
- Stellite/carbide overlay joints
- aerospace honeycomb structures
- wear-resistant furnace parts
- vacuum furnace brazing of stainless steel
Advantages
- Conducts heat well — 16 W/m·K (9.24 BTU/hr·ft·°F), better than 82% of nickel alloy grades
Limitations
- Low fracture toughness — 20 MPa·√m (18.2 ksi·√in), worse than 100% of nickel alloy grades
- Limited ductility — 1%, worse than 98% of nickel alloy grades
- Difficult to machine — 6/100, worse than 98% of nickel alloy grades
- Limited formability — 3/100, worse than 97% of nickel alloy grades
- Difficult to weld — 10/100, worse than 94% of nickel alloy grades
BNi-1 properties
Typical room-temperature values for BNi-1-AS-BRAZED; bars are the position among nickel alloy grades.
Physical3
BNi-1 has a density of 7.89 g/cm³ (0.285 lb/in³), lighter than 94% of nickel alloy grades. It melts at 977°C (1,791 °F).
Mechanical16
BNi-1 has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 550 MPa (79.8 ksi) — stronger than 73% of nickel alloy grades. Elongation at break is 1% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
BNi-1 is rated for continuous service to 900°C (1,652 °F). It conducts heat at 16 W/m·K (9.24 BTU/hr·ft·°F), better than 82% of nickel alloy grades. Thermal expansion is 12.5 µm/m·K (6.94 µin/in·°F).
Electrical3
BNi-1 conducts electricity at 1.6 % IACS, better than 70% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is good (58/100), worse than 91% of nickel alloy grades.
Sustainability4
Producing a kilogram of BNi-1 takes about 200 MJ of energy and emits 15 kg of CO₂ — more than 78% of nickel alloy grades. Typical recycled content is 10%.
Manufacturability8
BNi-1's machinability is not recommended (6/100, worse than 98% of nickel alloy grades); weldability not recommended (10/100); formability not recommended (3/100).
Common Calculations5
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-1 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with BNi-1
Is BNi-1 easy to machine?
Solidified filler is boride-hardened and effectively unmachinable — remove excess by grinding, EDM or abrasive blasting, never by turning or drilling.
Can BNi-1 be welded?
Do not fusion weld the joint; boron promotes hot cracking — repair by cleaning and re-brazing, and keep filler away from areas to be later welded.
Can BNi-1 be formed, bent or molded?
Supplied as powder, paste, tape or sintered preform; free-flowing at 1066–1204 °C in vacuum or dry hydrogen with clearances of 0.025–0.075 mm, and it will erode thin sections by boron diffusion if held too long.
BNi-1 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 | 13 – 15 | 14 |
| Bmelting-point depressant, forms hard borides | 2.75 – 3.5 | 3.1 |
| Si | 4 – 5 | 4.5 |
| Fe | 4 – 5 | 4.5 |
| Chigh-carbon version; BNi-1a limits C to 0.06 max | 0.6 – 0.9 | 0.75 |
| P | ≤ 0.02 | |
| S | ≤ 0.02 | |
| Al | ≤ 0.05 | |
| Ti | ≤ 0.05 | |
| Zr | ≤ 0.05 | |
| Other (total)max total of other elements | ≤ 0.5 | |
| Nibalance, nominally ~73 % | balance |
What surface finishes work on BNi-1?
Brazed surfaces can be passivated, aluminized or coated with the parent alloy; plating adheres poorly to boride-rich fillets and polishing gives slight phase relief.
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-1 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- N99600
- ISO
- B-Ni1
- Trade names
- Nicrobraz 150
How much does BNi-1 cost?
BNi-1 is a high-cost nickel alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
BNi-1 — frequently asked
What is BNi-1 used for?
BNi-1 is typically used for stellite/carbide overlay joints, aerospace honeycomb structures, wear-resistant furnace parts and vacuum furnace brazing of stainless steel. In short: hardest nickel braze filler; erosion-resistant brazed joints; service to 900 °C.
What is the yield strength of BNi-1?
BNi-1 has a typical yield strength of 500 MPa (72.5 ksi) and a tensile strength of 550 MPa (79.8 ksi) — stronger than 73% of nickel alloy grades. Strength varies by condition: see the 2 listed tempers.
Is BNi-1 easy to machine?
Not especially — machinability is rated not recommended (6/100, worse than 98% of nickel alloy grades). Solidified filler is boride-hardened and effectively unmachinable — remove excess by grinding, EDM or abrasive blasting, never by turning or drilling.
Can BNi-1 be welded?
Not readily — weldability is rated not recommended (10/100). Do not fusion weld the joint; boron promotes hot cracking — repair by cleaning and re-brazing, and keep filler away from areas to be later welded.
What surface finishes work on BNi-1?
Brazed surfaces can be passivated, aluminized or coated with the parent alloy; plating adheres poorly to boride-rich fillets and polishing gives slight phase relief.
Can BNi-1 be formed, bent or molded?
Supplied as powder, paste, tape or sintered preform; free-flowing at 1066–1204 °C in vacuum or dry hydrogen with clearances of 0.025–0.075 mm, and it will erode thin sections by boron diffusion if held too long.
What is the maximum service temperature of BNi-1?
BNi-1 is rated for continuous use to about 900°C (1,652 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does BNi-1 cost?
BNi-1 is a high-cost nickel alloy ($$$$), 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)
- ASM Handbook Vol. 6 — Welding, Brazing and Soldering — ASM International (1993)
- AWS Brazing Handbook, 5th ed. — American Welding Society (2007)
- Nicrobraz nickel brazing filler metal data sheets — Wall Colmonoy (2022)
- Brazing alloy powders and pastes (Ni-Cr-B-Si) technical data — Höganäs / Lucas-Milhaupt (2021)
- GB/T 10859 — SAC (2008)
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.