Regarding the color of stainless steel welds
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It is preferable for stainless steel welds to have a golden or silver color. Are there any specifications (including ASME specifications) that address this?
It seems that no standards specify that stainless steel welds should be golden or silver in color; this is a matter of common sense. The color of the weld surface indicates the degree of oxidation on that surface. Factors such as the energy input during welding, the concentration and flow rate of the shielding gas, and the welding techniques all affect the degree of oxidation of the weld. Generally, a silver color is the best; golden or slightly blue colors are acceptable, while dark blue or black colors indicate excessive oxidation of the weld surface, which is not acceptable.
Stainless steel is usually silver in color; if it turns slightly red or black, it has been oxidized, and the color at the welds is slightly red
Check the welding manual for this; it contains descriptions on this topic