COMMERCIAL STEEL DOORS
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- Non-handed design
- Seamed or Seamless
- Impact Resistant
- 304 or 316 Stainless Steel Type
- 12, 14, 16 or 18 Gauge
- #4, #6, or #8 Finish
- Multi-Core Options
- Up to 3 hour fire rated
From healthcare facilities and clean rooms to transit, hospitality, and coastal projects, stainless steel doors deliver unmatched strength, hygiene, and also longevity. Whether you need seamless construction, decorative finishes, or specialized performance features, we offer fully customizable stainless door and frame solutions built to your exact specifications.
Stainless steel doors are chosen when performance, appearance, and long-term durability matter most. Unlike standard hollow metal doors, stainless provides superior resistance to corrosion, wear, and harsh environments.
Complete your opening with precision-engineered stainless steel frames designed to match your door and application requirements.
Single or Double Steel Doors
Stainless steel doors are available in both single and double door configurations to meet a wide range of opening sizes, traffic demands, and functional requirements. Whether you need a compact solution for tight spaces or a wider opening for high-traffic or equipment access, we provide fully customizable options built for performance and durability.
Stainless Types
304 – 304 stainless steel is one of the most common types of stainless steel. It is also known as “18/8” stainless steel because it contains 18% chromium and 8% nickel. 304 stainless steel is the most widely used type of stainless steel. It is often used in food processing, kitchenware, and medical equipment.
316 – 316 stainless steel is an alloy that contains chromium, nickel, and molybdenum. It’s often used in chemical processing, the food and beverage industry, and the pharmaceutical industry. 316 stainless steel is more expensive than 304, but it is also more corrosion resistant. It is often used in marine environments and chemical processing plants.
Stainless Steel Finish Options
Stainless steel doors are available in a range of finishes to meet both functional and aesthetic requirements. The most common finishes — #4, #6, and #8 — offer varying levels of reflectivity, texture, and also visual impact, allowing you to match the needs of your project.
#4 Finish (Brushed Finish)
The #4 finish is the most widely used stainless steel finish for commercial doors. It features a uniform, directional grain that provides a clean, professional appearance while helping to hide fingerprints and minor surface scratches.
Best For:
- Commercial buildings
- Hospitals and healthcare facilities
- Schools and public buildings
#6 Finish (Fine Satin Finish)
The #6 finish is a softer, more refined version of the #4 finish with a smoother and more consistent satin texture. It offers a more uniform appearance while still maintaining low reflectivity.
Best For:
- Architectural applications
- Interior feature doors
- Projects requiring a refined aesthetic
#8 Finish (Mirror Finish)
The #8 finish is a highly polished, mirror-like surface that delivers a premium, high-end appearance. It is the most reflective option and is often used in architectural or decorative applications.
Best For:
- High-end commercial spaces
- Hospitality and retail environments
- Decorative or statement entrances
Seamed VS. Seamless Stainless Steel Doors
Seamed Stainless Steel Doors
Seamed doors are constructed with visible joints where the face sheets are formed and joined at the edges. This is the most common and also cost-effective stainless door construction.
Seamless Stainless Steel Doors
Seamless doors feature continuously welded and ground edges that create a smooth, one-piece appearance without visible seams.
Stainless Steel Door Core Options
The core of a stainless steel door plays a key role in its strength, insulation, and overall performance. We offer four core options to match a range of commercial and specialty applications, from lightweight interior use to heavy-duty environments.
Honeycomb Core
A lightweight and economical core designed for standard interior applications.
Best For:
- Interior commercial openings
- Low to moderate traffic areas
Polystyrene Core
An insulated core that improves thermal performance for exterior or climate-controlled environments.
Best For:
- Exterior openings
- Temperature-controlled facilities
Urethane Core
A high performance insulated core offering greater strength and superior insulation compared to polystyrene.
Best For:
- Demanding commercial environments
- Projects requiring enhanced insulation and durability
Steel Stiffened Core
A heavy duty core reinforced with internal steel channels for maximum strength and also durability.
Best For:
- High-abuse environments
- Industrial and institutional applications
In House Fabrication
Our full service welding and fabrication shop handles all your custom metal needs. Making Doors Unlimited Shop your top choice for it’s one-stop-shop advantage.
Offering custom hardware prep, welding, sidelites, transoms & borrow lites as well as windows.
What are stainless steel doors used for?
Stainless steel doors are used in environments that require durability, corrosion resistance, and cleanliness. Common applications include hospitals, laboratories, clean rooms, food processing facilities, transit buildings, and coastal projects.
What is the difference between seamed and seamless stainless steel doors?
Commercial hollow metal doors are made from channel-reinforced steel sheets filled with polystyrene, honeycomb, or polyurethane cores for strength and insulation
What are the most common stainless steel finishes?
The most common finishes are #4 (brushed), #6 (fine satin), and #8 (mirror). Each offers a different level of texture and reflectivity, ranging from practical and low-maintenance to highly polished and decorative.
What gauge steel is used for hollow metal doors?
Most commercial hollow metal doors are manufactured using 16 or 18 gauge steel.
What core options are available for stainless steel doors?
Available core options include honeycomb, polystyrene, urethane, and steel stiffened. Each core provides different benefits such as insulation, strength, or cost efficiency depending on the application.
