There are two general series of stainless steel grades used in the gas grill industry: 300 series and 400 series.
The 300 series group of alloys are non-magnetic and the basic 300 alloy contains 18% chromium and 8% nickel.
The 400 Series group of alloys are magnetic and the basic 400 alloy contains 11% chromium and 1% manganese. This series offers a much lower cost option in stainless steel parts.
-The 300 series is subject to corrosion at crevice points, while the 400 series has a considerably lower resistance to corrosion in general.
Knowing that, we choose the parts we sell to our customers very carefully! We try to gain as much information as possible about the grades of stainless steel we offer our customers so we can help them know what to expect from the parts they purchase.
As for burners and heat plates, they certainly are exposed to moisture but are exposed to much more heat. Heat is just as much of an enemy to steel, if not more so, as moisture and oxygen. Heating and cooling are used in the production of metals to actually change the chemical/molecular bonds and subsequent performance of the metal. It is no different inside your grill. While 300 series stainless will technically last longer than a 400 series plate of equal thickness, the benefit is only marginal. That marginal benefit compared to the substantial increase in cost doesn’t really pay off. We have found by spending a little more to make the plate out of a thicker 400 series stainless, you gain close to the same amount of life you would get out of a 300 series product at a fraction of the cost.
Answered by GPS on Apr 17, 2019
