Door frame
Material: High-quality galvannealed steel/galvanized steel/cold-rolled steel, featuring high strength, durable and rustproof.
Process: Precision stamping, bending and welding, with surface spraying/coating, beautiful and anti-corrosion.Applicable Scenarios: Indoor and outdoor door frames, fire doors, anti-theft doors, commercial and residential doors and windows.
Features: Stable structure, resistance to deformation, waterproof and moisture-proof, and support customized size and style.
Major parameters
Parameter Items
Description of specification
Base material
Galvannealed（DX51D+ZF)/galvanized steel sheet（SGCC）/cold-rolled steel sheet（SPCC）
Thickness range
0.8mm-2.0mm
Surface treatment
Zinc coating（≥80g）、Powder coating (RAL color numbers available)、 PVC film coating
Corrosion resistance
Salt spray test＞300 hours（galvannealed、galvanized）
Size ranges
Height 2000mm-3000mm，width 800mm-1500mm（Support non-standard customization）
Installation system
Pre-buried type, flat frame type, expansion bolt fixation (accessories are optional)
Fireproofing grade
Optional A-level fire resistance (conforming to GB12955 standard)
Environmental protection standard
Compliant with RoHS/REACH, it features an environmentally friendly process free of lead and chromium
Our door frame is engineered with structural stability in mind. Manufactured from premium-grade steel, it delivers excellent load-bearing capacity and long-term reliability. Compared with ordinary frames, the reinforced profile design significantly enhances resistance to bending, twisting, and external pressure. Even under frequent opening and closing, the frame maintains its original shape without sagging or warping.
As one of the professional steel door frame suppliers, we understand that strength is the foundation of safety. That is why every galvanized steel door frame undergoes strict quality inspection, including thickness tolerance control and welding seam testing. The solid internal structure improves impact resistance, making it suitable for high-traffic environments such as commercial buildings, apartments, hospitals, and industrial facilities.
Whether installed indoors or outdoors, these galvanized steel door frames provide dependable support for heavy fire doors, security doors, and customized metal doors. Their anti-deformation capability ensures long-term structural integrity and reduces maintenance costs over time.
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