METAL TYPES: ERNE-COATED STAINLESS STEEL 316

Timeless Character. Modern Stainless Performance.

The Character of Aged Metal. The Performance of Stainless Steel.

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Terne-Coated Stainless Steel 316 combines a corrosion-resistant austenitic stainless steel substrate with a lead-free tin coating, delivering excellent durability and the soft, muted appearance traditionally associated with terne metal.


Beginning with a silvery-gray surface, the material gradually develops a subtle matte-gray patina through natural weathering. The result is a timeless architectural finish that complements both traditional and contemporary roofing designs.

A Surface That Evolves Naturally

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Blue-gray textured wall panels with dark vertical seams
Gray textured wall panels with vertical seams

SILVERY GRAY

Initial Appearance

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SOFT MATTE PATINA

Natural Weathering

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Mature Appearance

Protective Green Verdigris Finish

Performance Beyond Appearance

Marine-Grade Protection
Grade 316 stainless steel contains molybdenum, which enhances resistance to pitting and crevice corrosion in chloride-rich environments. This makes it a durable material choice for architectural roofing in coastal and other demanding locations.


Terne-Coated Protection
The lead-free tin coating provides the distinctive muted appearance associated with traditional terne metal. Through natural weathering, the surface develops a subtle matte-gray patina that adds lasting architectural character.


Strength & Workability
The austenitic stainless steel substrate offers excellent durability and formability, making it suitable for standing-seam roofing, custom flashing, and detailed architectural sheet-metal fabrication.

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Ideal Applications

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Standing-seam roofing

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Flat-lock roofing systems

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Architectural roof detailing

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Custom flashing and trim

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Historic roof restoration

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Custom residential roofing

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Institutional roofing projects

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Coastal roofing applications

Why Architects & Builders Choose Terne-Coated Stainless Steel 316

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Soft, naturally weathering matte-gray appearance

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Enhanced corrosion resistance with Grade 316 stainless steel

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Excellent suitability for demanding coastal roofing environments

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Traditional terne-metal aesthetic

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Ideal for historic restoration and contemporary roofing

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Minimal maintenance

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Long-lasting architectural performance

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Lead-free tin finish and recyclable stainless steel

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