WELDING 304/304L TO A36 AND I HAVE A QUESTION

[whitetop]

This is a low load requirement weld using 309 filler to weld 304/304L to A36. If the weld isn't purged will the resulting "sugar" affect the strength of the joint or is it just a cosmetic problem? Maybe I should also be asking what transformation causes the "sugar"? This is a machine application and welding isn't one of my strong points. Any help will be appreciated.

 

[unclesyd]

What is the physical description of the two parts being welded togather?

Can you SMAW, stick welding?

Sugar is fessentially oxidized metals.

 

[metengr]

Depending on intended service application, as mentioned above, "sugaring" will have more of an impact on the corrosion properties in comparison to mechanical properties. If you are not concerned about corrosion properties, there should be no adverse effects in strength reduction for the weld or base metal.

 

[whitetop]

Clarification:

unclesyd; the parts being joined are crossed angles of the two materials, the welds are intended to be fillets. I probably would not specify (limited knowledge) the weld process leaving it to the fab shop to determine.

metengr; the environment is indoors with temperature and humidity control. The equipment is not intended for "wash-down" service. The A36, weld and heat effected zone (for approximately 2" beyond weld) will be painted.