Welding on Stainless Steel

Stainless steel resists corrosion and it is one of the iron based alloys. They usually do not rust and they are able to withstand certain types of liquids, chemicals or gases without corroding. They are versatile in their ability to withstand high temperatures and have some iron in them. ip69 enclosure

Stainless steel melts at a lower temperature, is more resistant to electricity and transfers heat at a lower level. They also expand at a higher rate when heated than other metals.
This can cause problems when welding because it has different reactions than other metals.

Stainless steel reacts differently to heat temperatures and if it is given too much heat, it can warp or create other distortions as it cools. Also, it is not as forgiving as mild steel so any mistakes you make along the way will show up and you can scratch it easily.

Rather than to use metal tables that can scratch the metal some welder use an aluminum or brass heat sink. This can prevent burn through because it actually will absorb the heat. When you are working the metal it is good to use the least amount of heat that you can.

There are several varieties of stainless steel and they are more difficult to engage in the welding process than mild steels made from carbon, basically because their physical properties are different. Here are a few:

Austenitic stainless steel — they are ones that weld easier because they have a lower thermal conductivity and they have a higher “coefficient of expansion” than other types of stainless steels.

Ferritic stainless steels — these are harder than other stainless steels and they do not become harder with heat. They also have the power to create their own magnetism called, “ferromagnetism” that can get in the way of the meld. In order to stop this, these types of stainless steels us a ferritic filler when necessary especially in arc welding.

Martensitic Stainless Steels — these are similar to the ferric stainless steels in that they are also magnetic but they will become harder when heated. Some of these will also have different percentages of carbon in them and if you have over a 0.15% of carbon, they will have to be preheated and post heated in order to make them work properly.

You will find stainless steel used in a variety of ways to build many products. You can look in your kitchen and find it in sinks in your breaker boxes and with some of your electronic counter appliances.

It is a major material that is used in construction of buildings, particularly with roofing, elevator doors or signage. You will also find it in the building of bridges and barrier walls.

Farming is another area where you will find stainless steel applications because they are used for milk silos , juice tanks and piping. The makers of beer and whine will use stainless steel vats to ferment wine and display it once it is ready. This type of equipment is easier to clean than others and is easily sanitized.

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