Does anyone know what grade of stainless steel the PG500 is made of ? 

Original Post

If CS would specify the parts made of 400 series, there might not be such a strong concern. I suspect those are the exterior parts needed to have a shiny finish. I have had my SM-066 for about 5 years in a salt environment (NJ shore) with no sign of corrosion or rust. I'm assuming the SS usage is about the same as in the PG.

Percy I got with our engineer and the majority of the parts are 430 stainless. The flame deflector is 201 and the Drain trough,air plenum bracket and the probe bracket are 304.

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