Heavy-Duty Black Steel Entry Door Black Steel Frame Doors Moisture-Proof Smart Lock Mail Slot Plate

The Heavy-Duty Black Steel Entry Door by YSM is engineered from the ground up for maximum security and all-weather durability. Each door features a 1.5mm–2.0mm thick galvanized steel panel with reinforced internal stiffeners, creating an exceptionally rigid structure that resists prying, impact, and forced entry. The moisture-proof matte black finish is independently tested to withstand 1,000+ hours of salt spray (ASTM B117), ensuring outstanding anti-corrosion performance in any climate. Operating reliably from -20°C to 45°C, this door is trusted by contractors and developers worldwide. Full OEM/ODM service available — specify your dimensions, finish, hardware, and accessories. All doors are CE EN 14351-1, RoHS certified, produced in ISO 9001:2015 facilities.

• Heavy-duty 1.5mm–2.0mm galvanized steel panel with internal reinforcement ribs — delivers exceptional structural rigidity and impact resistance, tested to withstand 500,000+ open/close cycles without deformation
• Moisture-proof matte black finish with 1,000+ hour salt spray rating (ASTM B117 equivalent) — outstanding anti-corrosion performance for coastal properties, pool houses, and high-humidity regions like Southeast Asia and the Gulf
• Integrated mail slot and customizable house number plate — polished stainless steel or brass finish options, with weather-sealed flap and internal privacy cover to prevent drafts and maintain thermal performance
• CE EN 14351-1 and RoHS certified — full technical documentation package available including DoP, test reports, and installation instructions in English, French, Spanish, or Arabic
• OEM/ODM with ISO 9001:2015 quality assurance — from custom dimensions to bespoke hardware selections, every order is managed through our ERP system with production status updates and pre-shipment inspection reports

Engineered for high-traffic residential entrances, single-family homes in coastal or humid regions, apartment complexes, and townhouse communities. The moisture-proof finish makes it the preferred choice for properties in Southeast Asia, the Caribbean, Gulf states, and other high-humidity environments. Building contractors and developers rely on its ISO 9001:2015 consistency for multi-unit project supply.

Q: What makes this door specifically suitable for humid and coastal environments?

A: This door features a proprietary moisture-proof coating system with enhanced anti-corrosion performance — tested to 1,000+ hours salt spray resistance. The galvanized steel substrate (Z275 zinc coating) provides sacrificial protection even if the surface is scratched. EPDM weather seals remain flexible and watertight from -20°C to 45°C. Combined with CE EN 14351-1 certified weather tightness (Class 4 air, Class 5A water), this door is purpose-built for tropical, coastal, and high-humidity installations.

Q: Do you offer sample doors for evaluation before bulk ordering?

A: Yes, we can provide sample doors for your evaluation. Sample pricing, lead time, and shipping cost depend on the specific configuration. Many of our long-term distributor partners started with a sample order to verify quality firsthand. We encourage customers to inspect the material thickness, coating quality, hardware operation, and overall finish before committing to volume orders. Contact our OEM/ODM team with your requirements for a sample quotation.