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Old 10-25-2010
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18-8: 300 series stainless steel having approximately (not exactly) 18% chromium and 8% nickel. The term "18-8" is used interchangeably to characterize fittings made of 302, 302HQ, 303, 304, 305, 384, XM7, and other variables of these grades with close chemical compositions. There is little overall difference in corrosion resistance among the "18-8" types, but slight differences in chemical composition do make certain grades more resistant than others do against particular chemicals or atmospheres. "18-8" has superior corrosion resistance to 400 series stainless, is generally nonmagnetic, and is hardenable only by cold working.


18-8 is covers a bit to much ground BUT i have never seen many problems in above the water line use other than staining which is pretty easy to resolve these days with a product like spotless stainless
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1981 J24 Tangent 2930
Tommays
Northport NY


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