Product Categories:
Finished door
Product Description
Our finished steel doors are made of military-grade steel materials (galvannealed steel/ hot-dip galvanized/cold-rolled steel), refined through an integrated molding process and multi-layer protection technology. The door structure integrates three functions of anti-theft, fire resistance, and sound insulation, which is suitable for high-end residences, commercial spaces, medical and educational facilities, etc. They meet the anti-theft standards of GB17565-2007 and the fire protection certification requirements of GB12955-2008.
Major parameters
| Parameter Items | Description of specification |
| Base material | Door panel: galvannealed（high corrosion resistance）/ galvanized（anticorrosive coating≥80g） |
| Internal framework: galvanized（1.2mm thickened square tube, compressive strength≥300MPa） | |
| Door frame structure: galvannealed（salt spray test＞500hours） | |
| Performance index | Anti-theft grade: Class A (Destruction time ≥30 minutes) |
| Fire resistance duration: Grade B (≥60 minutes flame retardant) | |
| Sound insulation coefficient: Rw 35dB (filled with composite rock wool) | |
| Adapted specifications | Standard door thickness: 50/70/90mm |
| Door opening size: 860×2050mm to 1200×2300mm（support non-standard customization） |
Product advantage
Military-grade protection system
Galvannealed door frame: Active sacrificial anode protection, completely eliminating the risk of door frame rusting
Double-sided hot-dip galvanized panels: Dense zinc layer forms a physical barrier, extending service life in humid environments by 3 times
SPCC frame structure: Through high-frequency welding and stress relief treatment, anti-deformation ability is enhanced by 40%
Integrated tripartite functionality
Anti-theft: Multiple locking latches + C-level lock cylinder, passing the 3000N static pressure test
Fireproof: Expansion sealing strips + flame-retardant core material, automatically sealing gaps upon fire
Sound insulation: Sandwich structure + gradient filling, effectively blocking mid-to-low frequency noises
Full-process efficiency enhancement design
Pre-installed anti-pickout hinges (with load capacity ≥ 200kg), reducing installation time by 50%
Pre-installed anti-corrosion positioning pins in the door frame, resolving closure deviations caused by wall settlement
Standardized interface design, compatible with 90% of the current smart lock systems on the market
Life cycle value
Material recovery rate > 95%, certified by SGS for environmental protection
Self-repairing coating technology, the scratched area regenerates an oxide film within 72 hours
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Contact Us
E-mail: partner@rosensteelga.com
Tel: +86-27-86615388
WhatsApp: +86 177 6252 7953
WeChat:Rosen17762527953
Add.: No. 1, 30th Floor, Building 1, Fuxing Huiyu Waterfront International, Sanjiao Road Village, Xujiapeng Street, Wuchang District, Wuhan City, Hubei Province,P.R.China
