Grade 304 is common for general construction, but 316 is preferred in marine or highly corrosive environments. Both offer excellent corrosion resistance, but 316 provides better protection against chlorides and saltwater.
Most stainless steel screws are only slightly magnetic or non-magnetic, depending on the alloy. 304 stainless is generally non-magnetic, while cold-working or certain alloys can increase magnetism.
Yes, stainless steel is compatible with pressure-treated lumber. It resists the corrosion caused by the chemical preservatives used in treated wood, unlike zinc-plated or plain carbon steel screws.
