Brazing is one technique that is used around the world because it is so effective in creating a solid, durable and leak proof joint. It is ideal for connecting and joining similar metals or different types of metals since it doesn’t require the heating and melting of either one of the metals, rather it relies on the melting of a softer alloy that forms the bond and joint between the two. Brazing steel is commonly used in many different applications to provide a strong, leak proof joint.
Make the Joint Right
While this may seem obvious even the best professional brazing steel is at a disadvantage if the joint is not properly designed and manufactured. You want to ensure the two metals that are being joined have an equal clearance, which should be uniform and to the set standard for the types of metal, to allow the drawing or capillary action to bring in the filler to create the joint.
Areas where the joint is too close will result in lower overall strength as sufficient filler is not equally distributed. When the joint is too wide there may be pockets were the filler is not uniformly thick, weakening the overall joint. There is also more risk of problems where the filler is not actually bonded to either metal but simple to itself, making the joint only as strong as that hi-temp brazing stainless steel alloy’s tensile strength.
Clean Before Brazing Steel
It is essential to remove all oxidation from the brazing steel to allow the filler to be drawn into the joint. However, rust is not the only problem. Any type of surface contaminant or debris can cause serious issues with getting a uniform joint. This is because dirt, grease, oil or metal shavings or filings will all prevent the braze from being drawn into the joint and providing the bonding required. Keep in mind that even grease from your hands can cause a problem and should be removed.
You should carefully clean all parts based on the type of surface contaminant that may be present. Always start with removing surface grease or oil and then remove any rust or scale. It is also highly recommended to complete the cleaning right before you actually complete the process of brazing steel to have the best possible surface preparation.
There are many Steel Brazing Companies in the market today. Hi-Temp Brazing started to torch braze in 1974 to offer services for clients. There are three commonly used forms of brazing; manual, machine, and automatic.