Key Features
Fire protection for demanding hygienic environments
Premium Stainless Grades
304 grade for standard applications, 316 grade for marine, chemical, and pharmaceutical environments requiring maximum corrosion resistance.
- Corrosion resistance
- Chemical resistance
- Long service life
30-120 Minute Ratings
Full range of fire ratings available. Same fire performance as standard steel doors with added hygiene and corrosion benefits.
- Full rating range
- Critical applications
- Code compliance
Hygienic Construction
Smooth, non-porous surfaces with minimal joints. Easy to clean and sanitize. Resists bacterial growth and contamination.
- Bacterial resistance
- Easy sanitization
- Contamination control
Multiple Finish Options
#4 satin finish (standard), mirror polish, bead blast, or PVD coatings for color options.
- Aesthetic options
- Fingerprint resistance
- Easy maintenance
International Certifications
UL 10C, BS 476-22, EN 1634-1 certified. Additional certifications available for pharmaceutical and cleanroom applications.
- Global compliance
- Healthcare acceptance
- Project approval
Matching SS Frames & Hardware
Complete assemblies with stainless steel frames and fire-rated hardware. Consistent material throughout for hygiene requirements.
- Material consistency
- Simplified specification
- Aesthetic uniformity
Note: Stainless steel fire doors are essential where hygiene, corrosion resistance, and fire protection must all be achieved in demanding environments.
Stainless Steel Grades
Select the appropriate grade for your environment
18% Chromium, 8% Nickel. Good general corrosion resistance for most indoor applications.
Best For
16% Chromium, 10% Nickel, 2% Molybdenum. Excellent resistance to chlorides and harsh chemicals.
Best For
Low carbon version of 316. Superior resistance to weld decay for applications requiring field modifications.
Best For
Surface Finish Options
| Finish | Description | Ra Value | Application |
|---|---|---|---|
| No. 4 Brushed Satin | Unidirectional satin finish with fine lines | 0.5-1.0 µm | Most common—easy to maintain |
| No. 2B Mill Finish | Smooth, reflective mill finish | 0.1-0.5 µm | Industrial applications |
| Bead Blasted | Non-directional matte texture | 2.0-4.0 µm | Reduced glare, fingerprint resistance |
| Mirror Polished (No. 8) | High reflectivity mirror finish | <0.05 µm | Premium architectural |
| Electropolished | Chemically smoothed for maximum cleanability | <0.4 µm | Pharmaceutical cleanrooms |
Grade Selection Guidance
Specify 304 for most hospital and food service applications. Upgrade to 316/316L for coastal locations, swimming pool areas, chemical exposure, or pharmaceutical cleanrooms.
Construction Details
Corrosion-resistant engineering for hygienic and demanding environments
Stainless steel fire doors combine premium corrosion-resistant materials with proven fire-resistant construction methods. Full stainless steel exterior surfaces for corrosion and chemical resistance, fire-resistant core materials providing thermal barrier, welded construction for hygienic, crevice-free surfaces.
Door Leaf Components
1 Face Sheets
Stainless steel (304, 316, or 316L grade)
- • Thickness: 0.8-1.5mm (20-16 gauge)
- • Finish: No. 4 brushed satin (standard)
- • Provides corrosion resistance and hygiene
2 Internal Stiffeners
Galvanized or stainless steel reinforcement
- • Vertical stiffeners and horizontal rails
- • Hardware mounting points
- • Structural rigidity
3 Core Material
Fire-resistant insulation core
- • Mineral wool, honeycomb, or composite
- • Density: 120-200 kg/m³ by rating
- • Primary thermal barrier
4 Edge Construction
Folded and welded stainless steel edges
- • Continuous weld seams
- • Prevents moisture ingress
- • Eliminates bacterial harboring
Fire-Resistant Core Options
Mineral Wool Core
Density: 140-200 kg/m³
High-density mineral wool providing excellent fire resistance and acoustic properties.
Honeycomb Core
Aluminum or steel honeycomb
Lightweight core for standard fire ratings with good thermal performance.
Hybrid/Composite Core
Honeycomb + mineral materials
Engineered core balancing weight and fire performance.
Stainless Steel Frame Types
| Frame Type | Construction | Applications | Cost |
|---|---|---|---|
| Full Stainless Steel Frame | Welded SS box section or pressed profile (304/316) | Pharmaceutical, food processing—complete hygienic system | $$$ |
| Stainless Steel Clad Frame | Carbon steel core with SS facing | Cost-effective with stainless appearance | $$ |
| Pressed Steel Frame + SS Door | Standard pressed steel frame, powder coated | Budget option where frame exposure is limited | $ |
Stainless Steel Hardware
Hinges
316 SS fire-rated ball bearing
Locks
SS body with matching levers
Closers
SS housing or covers available
Kick/Push Plates
Matching SS grade, welded
Fire Ratings
Corrosion-resistant fire protection from 30 to 120 minutes
Stainless steel fire doors provide the same fire protection capabilities as standard steel doors while offering superior corrosion resistance and hygienic properties. Stainless steel construction does not compromise fire performance—the material's higher melting point and thermal stability provide excellent fire resistance when properly engineered.
EI30 / FD30
Entry-level fire protection with full corrosion resistance. Ideal for hygienic environments requiring frequent cleaning and chemical exposure resistance.
Applications
EI60 / FD60
Standard commercial fire protection for demanding environments. Meets most building code requirements while providing hygienic, corrosion-resistant surfaces.
Applications
EI90 / FD90
Enhanced fire protection for critical applications combining extended evacuation time with maximum corrosion and chemical resistance.
Applications
EI120 - Maximum
Maximum fire protection in corrosion-resistant construction. For the most demanding applications requiring both extended fire resistance and environmental durability.
Applications
Fire Testing Standards
| Standard | Region | Description | Stainless Note |
|---|---|---|---|
| UL 10C / NFPA 252 | North America | Positive pressure fire test for door assemblies | Material grade does not affect results |
| BS 476-22 | UK/Commonwealth | Fire resistance test—integrity and insulation | Equivalent or superior to carbon steel |
| EN 1634-1 | Europe | European harmonized fire door testing | Classification applies regardless of grade |
Material Comparison
How stainless steel fire doors compare with other fire-rated door materials
Stainless Steel vs Other Materials
| Feature | Stainless Steel | Steel | Wood | Glass |
|---|---|---|---|---|
| Maximum Fire Rating | 120 minutes | 120 minutes | 90 minutes | 120 minutes |
| Corrosion Resistance | Excellent | Good (with coating) | N/A | Excellent |
| Chemical Resistance | Excellent | Limited | Poor | Good |
| Hygiene/Cleanability | Excellent | Good | Poor | Good |
| Cost | $$$ | $$ | $$$ | $$$$ |
| Maintenance | Very Low | Low | Moderate | Low |
| Food Contact Safe | Yes | No (painted) | No | Yes |
| Best Applications | Healthcare, food, pharma, coastal | Commercial, industrial | Hospitality, offices | Lobbies, storefronts |
304 vs 316 Grade Comparison
| Property | 304 Stainless | 316 Stainless | Carbon Steel (Ref) |
|---|---|---|---|
| General Corrosion | Good | Excellent | Poor without coating |
| Chloride Resistance | Moderate | Excellent | Poor |
| Chemical Resistance | Good | Excellent | Limited |
| Coastal/Marine Use | Limited | Recommended | Not suitable |
| Cost vs Carbon Steel | +50-70% | +70-100% | Base |
| Typical Applications | Indoor hygienic | Harsh environments | Standard commercial |
Why Choose Stainless Steel Fire Doors?
Corrosion Immunity
Inherent corrosion resistance eliminates rust concerns in humid, wet, or corrosive environments.
Hygienic Properties
Non-porous surface prevents bacterial growth and supports infection control protocols.
Chemical Resistance
Withstands cleaning chemicals, disinfectants, and mild acids without degradation.
Maintenance Freedom
No painting, no rust treatment—simple cleaning maintains appearance for decades.
Food Safety Compliance
FDA and EC approved for food contact—essential for food processing facilities.
Long-Term Value
Higher initial cost offset by elimination of maintenance and longer service life.
Recommendation: Stainless steel fire doors are the definitive choice for healthcare, food processing, pharmaceutical, and corrosive environments. The material's inherent corrosion resistance and hygienic properties justify the premium over standard steel in demanding applications.
Applications
Where stainless steel fire doors are essential
Healthcare Facilities
Operating rooms, sterile corridors, pharmaceutical storage, and patient care areas requiring hygiene and fire protection.
Key Requirements
- Easy sanitization
- Bacterial resistance
- Vision panels
Food Processing
Processing areas, cold storage, and USDA/FDA regulated spaces requiring food-safe materials and fire separation.
Key Requirements
- Food-safe materials
- Wash-down capability
- Chemical resistance
Pharmaceutical & Biotech
Cleanrooms, labs, and GMP facilities requiring contamination control and fire protection.
Key Requirements
- Cleanroom compatible
- Smooth surfaces
- 316 grade for chemicals
Commercial Kitchens
Restaurant kitchens, hotel food service, and institutional kitchens requiring grease and heat resistance.
Key Requirements
- Grease resistance
- Heat tolerance
- Easy cleaning
Marine & Coastal
Shipboard applications and coastal buildings where salt air corrosion is a concern.
Key Requirements
- 316 grade required
- Salt resistance
- Marine certifications
Cleanrooms & Labs
ISO-rated cleanrooms, research laboratories, and semiconductor facilities.
Key Requirements
- Low particle generation
- Flush surfaces
- Vision panels
Grade Selection Guide
304 grade is suitable for most indoor applications. 316 grade is required for marine environments, chemical exposure, pharmaceutical manufacturing, and coastal locations. Consult with Euwoo technical team for grade recommendations for your specific application.
Technical Specifications
Detailed specifications for stainless steel fire doors
Standard Dimensions
| Width | 762mm - 1219mm (30"-48") |
| Height | 2032mm - 2743mm (80"-108") |
| Standard | 914 x 2134mm (36" x 84") |
| Width | 1524mm - 2438mm (60"-96") |
| Height | 2032mm - 2743mm (80"-108") |
| Standard | 1828 x 2134mm (72" x 84") |
Door Thickness by Fire Rating
Materials
| Component | Specification |
|---|---|
| Face Skins | 304 or 316 SS, 18-14 gauge |
| Core | Mineral fiber fire-resistant |
| Edges | Seamless or welded SS |
| Available Gauges | 18ga (1.2mm), 16ga (1.5mm), 14ga (1.9mm) |
Performance Data
| Property | Value |
|---|---|
| Fire Rating | 30, 60, 90, 120 minutes |
| Salt Spray (304) | 1000+ hours (ASTM B117) |
| Salt Spray (316) | 2000+ hours (ASTM B117) |
| Acoustic Rating | STC 35-45 |
Customization Options
Configure corrosion-resistant fire doors for your specific application requirements
Stainless Grade
- • 304 - Base pricing, indoor hygienic
- • 316 - +15-20%, coastal/chemical
- • 316L - +18-25%, critical pharma
Surface Finish
- • #4 Brushed Satin - Most popular
- • Bead Blasted - Fingerprint resistant
- • Mirror/Electropolished - Premium
- • PVD Colors - Gold, bronze, black
Frame Options
- • Full SS Frame - Complete hygienic
- • SS Clad Frame - Cost-effective
- • Pressed Steel - Budget option
Vision Panels
- • Standard - 200x600mm, 300x300mm
- • Flush Glazing - For cleanrooms
- • Full Lite - Maximum visibility
Hardware Prep
- • Hinge prep (standard/continuous)
- • Lock prep (mortise/cylindrical)
- • Closer prep (surface/concealed)
- • Panic hardware prep
Special Features
- • Cleanroom - Flush, ground welds
- • Radiation - Lead lining
- • Acoustic - STC 35-45
- • Kickplate - Welded SS
Custom Order Process
Minimum Order Quantities
Certifications
Internationally certified corrosion-resistant fire door assemblies
Fire Door Certifications
UL
UL Listed - UL 10C
North America
UL certification for stainless steel fire door assemblies. Positive pressure testing verifies that stainless steel construction performs equivalently to standard steel in fire conditions.
Test Method: Positive pressure fire exposure per ASTM E119 with hose stream test.
BS
BS 476-22:1987
UK & Commonwealth
British Standard certification recognized throughout UK, Middle East, and Commonwealth regions. Stainless steel doors achieve full FD ratings including FD120.
Test Method: Furnace exposure with integrity and insulation measurements.
CE
CE Marking - EN 1634-1
European Union
European CE marking based on harmonized testing. Enables stainless steel fire doors to be sold throughout the European Economic Area.
Classification: E (integrity), EI (integrity + insulation) with Declaration of Performance (DoP).
GB
GB 12955-2008
China
Chinese national standard for fire-resistant doors. Stainless steel construction available for all grade classifications.
Hygienic Environment Certifications
Cleanroom Compatibility
ISO 14644, GMP Guidelines
- • Flush construction
- • Welded seams
- • Minimal crevices
- • Compatible with cleaning agents
Healthcare Infection Control
HTM 03-01, CDC Guidelines
- • Easy disinfection
- • Chemical resistance
- • No paint to chip
- • Bacterial resistance
HACCP Compliance Support
HACCP Principles
- • Food-safe material
- • Cleanable surfaces
- • Corrosion resistance
- • FDA/EC 1935/2004 compliant
Manufacturing Quality Certifications
Certification Documentation Available
- Fire test reports from accredited labs
- Product certification certificates
- Declaration of Performance (DoP)
- Mill test certificates (EN 10204 3.1)
- Material grade verification
- Installation & maintenance instructions
Installation Guide
Installation requirements for corrosion-resistant fire door assemblies
Important: Fire doors must be installed by qualified personnel familiar with NFPA 80 requirements. Protect stainless steel surfaces from scratching and contamination during installation.
Pre-Installation Requirements
Surface Protection
- • Keep protective film until installation complete
- • Handle with clean gloves
- • Store in clean, dry area
- • Avoid contact with carbon steel tools
Opening Verification
- • Verify dimensions match frame requirements
- • Confirm plumb, level, square (3mm tolerance)
- • Check wall construction is complete
- • Verify floor is level for threshold
NFPA 80 Clearance Requirements
| Location | Maximum Clearance | Note |
|---|---|---|
| Hinge edge | 3mm (1/8") | Standard NFPA 80 |
| Lock edge | 3mm (1/8") | Standard NFPA 80 |
| Top edge | 3mm (1/8") | Standard NFPA 80 |
| Meeting edges (pairs) | 3mm (1/8") | With astragal |
| Bottom edge | 20mm (3/4") | Standard |
| Bottom with threshold | 10mm (3/8") | With seal |
Maintenance Guidelines
Routine Maintenance
Warm water + mild detergent. Wipe in direction of grain. Rinse and dry.
Silicone-based lubricant on hinges and lock mechanism.
Visual inspection. Replace if damaged, cracked, or missing.
Do NOT
- Use chloride-containing cleaners (bleach)
- Use steel wool or abrasive pads
- Allow carbon steel tools to contact surface
- Leave wet materials against surface
- Paint over fire labels
Common Issues & Solutions
| Problem | Cause | Solution |
|---|---|---|
| Tea staining / rust | Airborne iron particles or salt | Clean with SS cleaner. Consider 316 for coastal. |
| Fingerprints | Natural oils from handling | Regular cleaning. Consider bead-blasted finish. |
| Scratches | Abrasive cleaning or impacts | Blend with scotch-brite following grain. |
| Door not latching | Closer maladjustment or strike misalignment | Adjust closer force. Realign strike. |
Frequently Asked Questions
Common questions about stainless steel fire doors