InvariGrain is a rolled-in grit line finish, similar to conventional #4 stainless, with superb overall consistency. Designed for architectural applications such as wall panels, elevators, coping and trim, InvariGrain offers excellent panel-to-panel matching. Since the rolled-in pattern does not employ abrasives in processing, the surface is microscopically smoother than conventional #4 polish, having fewer places for dirt and corrosives to settle. It is therefore easier to clean and more corrosion-resistant. Since InvariGrain has no coatings to deteriorate, it will last indefinitely without maintenance.

 

Grade Selection
The long-term performance of InvariGrain is dependent on proper grade selection. In most environments, Type 304 will be sufficient to prevent corrosion. In normal seacoast applications, Type 316 should be specified. If parts are to be welded, the low carbon versions of these grades (304L/316L) should be used. Highlights of chemical analyses and properties appear in table I. Severe environments such as seacoast atmospheres subjected to salt water spray and chemical plants will require different alloys, subject to application review.

Pounds Per Piece
Thickness (in.) x Width (in.) x Length (in.) x .292

Available Sizes
Coils and cut lengths up to 288" are available.

Typical Surface Characteristics
Spectral Gloss at 85°............................. 60
Ra....................................................... 20-35

Fire Resistance
Since stainless steel is dimensionally stable up to 2000°F, InvariGrain provides an added measure of protection in the event of a fire.

Flatness
InvariGrain is supplied within five I units of flatness, which is well below standard commercial allowances.

 

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