The first, and obvious, point to make about dimensioning braze fillets on drawings is that once a braze-fillet size is specified on a drawing, it must be inspected and measured to verify compliance.

Many brazing shops use graphite fixtures on which they set parts that are being brazed.

It is NOT recommended that either dye-penetrant inspection (DPI) or fluorescent-penetrant inspection (FPI) be used for inspecting brazed joints, particularly on any parts for which subsequent braze repair may be required!

A number of corporations use radiography as an important part of their accept/reject criteria for in-house brazing operations, believing that X-ray films can always show any imperfections, voids, etc. in any of the components they braze.

Question: We braze steel components together using a copper brazing paste. After furnace brazing, we notice a carbon residue around the edge of the brazed joint. Where is this coming

Extensive testing over the years in many places has shown that the best surface (generally speaking) for brazing is the "as-received" surface roughness of the material coming into the shop.

Question: I have heard the terms "diffusion bonding" and "diffusion brazing" both used in reference to the joining of metallic substrates, and I was wondering if there is really any

Question: We tried water quenching some parts during our automated flame-brazing operation, and the joints don't look good. Some are weak, showing poor filler-metal solidification around the joint. We sprayed

In today's tough economy, brazing shops need to take a closer look at ways to lower their brazing costs.

Fig. 1. Expansion curves for some common metals Question (Part 2 from last week): Even with built-in "holds" when we heat our low-carbon steel parts up to brazing temp, we