Welding Stainless Steel to other Steel Material

Welding austenitic stainless steel to carbon and other low alloy steel are established methods in the process and construction industries. Dissimilar metal welds involving stainless steel can be done using most full fusion weld methods, including TIG (Tungsten Inert Gas) and MIG (Metal Inert Gas).

Weld procedures using filler (consumable) enable better control of joint corrosion resistance and mechanical properties. In selecting the weld filler, the joint is considered as being stainless, rather than the carbon steel. Over-alloyed fillers are used to avoid dilution of the alloying elements in the fusion zone of the parent stainless steel.

The most common combinations of dissimilar steel involving stainless steel are plain carbon or low alloy structural grades and austenitic stainless steel grades such as 1.4301 (304) or 1.4401 (316).

Carbon steel and alloy steel containing less than 0.20%C do not normally need any preheat when being welded to austenitic stainless steel. Carbon and alloy steels with carbon levels over 0.20% may require preheat. High restraint joints, where material thickness is over 30mm, should also be preheated. Temperature of 150 C are usually adequate.

Carbon steel may be more prone to hydrogen associated defects than austenitic stainless steel and so careful drying of welding consumables is advisable.

When welding stainless steel to galvanised steel, the zinc coating around the area to be joined should be removed before welding. Molten zinc if present in the weld fusion zone can result in embrittlement or reduced corrosion resistance of the finished weld. When welding stainless steel to mild steel, LDX309L, S32304, S32205, 309L, P5,P10,P16,904L are frequently be used.

When welding Stainless Steel to Nickel base alloy steel P10 P12 are frequently used.

Directory | Standard | Heat | Heat Exchanger | Temperature | Pressure | Corrosion | Hardness | Surface | Properties | Select Stainless Steel | Contact US