2205 Stainless Steel Welding

Because welding duplex stainless steel.

2205 stainless steel welding. 2205 is a duplex austenitic ferritic stainless steel containing about 40 50 ferrite in the annealed condition. Selection of a joint design should accommodate the following guidelines. Applications include chemical processing oil and gas exploration marine and other high chloride environments and paper digestors. Alloy 2205 material has lower nickel and molybdenum contents than austenitic stainless steel and have.

It is not prequalified so it must be qualified by testing. 2205 maintains its corrosion resistance in temperatures up to 600 f. A suitable electrode diameter is 5 64 3 32 inch 2 2 4 mm depending on base metal thickness welding position and accessibility for root side grinding. Also known as duplex stainless steel it has twice the strength of 316 stainless steel.

If embrittled this can only be rectified by a full solution annealing treatment. I believe it is a duplex stainless steel. Most duplex stainless steels have an over alloyed filler. Saf duplex 2205 stainless steel uns s32205 formerly known as uns s31803 and commonly known as alloy 2205 has a mixed microstructure of austenite and ferrite and is a two phase alloy based on the fe cr ni series.

In order to obtain a considerable proportion of post weld structure it is critical to know the line energy when welding 2205 duplex steel. Saf duplex 2205 stainless steel uns s32205 s31803 alloy material. In order to avoid the grain growth too fast or coarse control the heat. It should not be too big or too small.

In terms of process the welding process of ordinary austenitic stainless steel is sufficient. Here are links for welding 2205 duplex and for zeron 100 super duplex. Post weld heat treatment to soften and toughen the weld. For example 2205 uses 2209 and zeron 100 uses zeron 100x.

2205 is the most widely used duplex ferritic austenitic stainless steel grade. Its most important properties are excellent corrosion resistance and high strength. 2205 is annealed at 1020 1100 o c followed by rapid cooling. Use it for high pressure applications in caustic environments.

The notes below are shortened rules of thumb so please consult the full welding guides for details. As such it is not prequalified under aws d1 6. 2205 is listed in aws d1 6 2007 table f 1 page 204 8th column from the right margin. 4 type 2205 code plus two duplex stainless steel welding.

2205 stainless steel resists cracking even when faced with a combination of tensile stress corrosive chemicals and heat. It should be easy to achieve full penetration. Although 2205 has good high temperature oxidation resistance this grade like other duplex stainless steels suffers from embrittlement if held for even short times at temperatures above 300 o c.