Nickel Alloy BNi-1 AS-BRAZED
Heat-treated state · default condition
UNS N99600 · ISO B-Ni1 · also Nicrobraz 150
Default state of a vacuum or dry-hydrogen furnace braze at 1066–1204 °C; hard, erosion-resistant, essentially non-ductile joint.
Values for the AS-BRAZED condition
Other BNi-1 tempers and conditions
BNi-1 is listed in 2 conditions; see the grade overview at BNi-1.
- BRAZE-DIFF
- AS-BRAZED
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-BRAZEDDefaultThis page 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 |
What is BNi-1 AS-BRAZED?
BNi-1 AS-BRAZED is BNi-1 heat treated to AS-BRAZED — default state of a vacuum or dry-hydrogen furnace braze at 1066–1204 °C; hard, erosion-resistant, essentially non-ductile joint. BNi-1 AS-BRAZED 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). BNi-1 AS-BRAZED 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).
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 AS-BRAZED properties
Typical room-temperature values for BNi-1 AS-BRAZED; 22 are specific to this condition. Other listed values are BNi-1 reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
BNi-1 AS-BRAZED 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 AS-BRAZED 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 AS-BRAZED 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 AS-BRAZED 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 AS-BRAZED 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 AS-BRAZED'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. Confirm any required mill or lot documentation when quoting.
Working with BNi-1 AS-BRAZED
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.
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.
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 | — |
BNi-1 AS-BRAZED — frequently asked
What is BNi-1 AS-BRAZED used for?
BNi-1 AS-BRAZED 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 AS-BRAZED?
BNi-1 AS-BRAZED 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 AS-BRAZED 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 AS-BRAZED 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 AS-BRAZED?
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 AS-BRAZED 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 AS-BRAZED?
BNi-1 AS-BRAZED 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.