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Black Flux - Black Brazing Flux, 1 Lb
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$23.52
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SKU: 100007031
Overview
This paste flux is intended for high-temperature silver solder work where controlled application matters. It is formulated for use with Silvaloy 355 silver solder and is especially suited to stainless steel and other refractory metals within its 1,100°–1,800°F working range. The paste consistency helps place the flux precisely on the joint, and cleanup is straightforward with hot water. It is not intended for aluminum, magnesium, or titanium, so it is best matched to compatible high-temperature brazing and soldering jobs.
Why Hunters Choose the Brownells
Working Range
Of 1,100°F to 1,800°F suits
Use Silvaloy
355 silver solder
Works Particularly
Well on stainless steel and
Paste Formula
Allows precise application where needed
Cleans Up
Hot water for easier post-use
Key Features
- High-quality paste flux for high-temperature silver solder applications.
- Working range of 1,100°-1,800°F.
- Designed for use with Silvaloy 355 silver solder.
- Works particularly well on stainless steel and other refractory metals.
- Paste formula applies precisely where needed and cleans up with hot water.
- Meets Fed. Spec. 0-F-499 Type B, AMS 3411, and AWS FB3-C standards.
Best Used For
- Stainless steel silver solder work requiring a high-temperature paste flux
- High-temperature brazing tasks using Silvaloy 355 silver solder
- Precise flux application on refractory metals in shop settings
- Users needing a cleanable paste flux for controlled solder joints
Specifications
| Cleanup | hot water |
|---|---|
| Designed For | Silvaloy 355 silver solder |
| Formula | Paste |
| Iso Certification | ISO 9002 certified |
| Meets Ams Specification | 3411 |
| Meets Aws Specification | FB3-C |
| Meets Federal Specification | 0-F-499 Type B |
| Not For Use On | aluminum, magnesium, or Titanium |
| Recommended For | Stainless Steel |
| Suitable Materials | stainless steel and other refractory metals |
| Working Range | 1,100Adeg-1800Adeg F |
Pros
- Working range of 1,100°F to 1,800°F suits high-temperature silver solder applications.
- Designed for use with Silvaloy 355 silver solder.
- Works particularly well on stainless steel and other refractory metals.
- Paste formula allows precise application where needed.
- Cleans up with hot water for easier post-use cleanup.
Considerations & Trade-offs
- Designed for high-temperature silver solder applications, so it is not a general-purpose flux for lower-temperature jobs.
- Specifically intended for Silvaloy 355 silver solder, which may make it less versatile if you use other solder systems.
- Not for use on aluminum, magnesium, or titanium, limiting material compatibility.
- Paste form allows precise application, but it may require careful cleanup with hot water after use.
Suggested Comparisons
- Silver brazing fluxes
- High-temperature soldering fluxes
- Stainless steel brazing supplies
- Refractory metal joining supplies
Suggested Accessories
- Flux brush
- Heat-resistant gloves
- Silver solder
- Pickling solution
Frequently Asked Questions
What is Black Flux intended for?
Black Flux is a high-quality paste flux designed for high-temperature silver solder applications, and it is specifically recommended for use with Silvaloy 355 silver solder.
Can this flux be used on stainless steel?
Yes. The product description says it works particularly well on stainless steel and other refractory metals.
What temperature range does it work in?
Its working range is listed as 1,100°F to 1,800°F.
Is Black Flux suitable for aluminum, magnesium, or titanium?
No. The product description specifically says it is not for use on aluminum, magnesium, or titanium.
How is the flux applied and cleaned up?
It comes as a paste formula that is easy to apply where needed, and it cleans up with hot water.