When sourcing metal conference chairs, prioritize the frame material and thickness; a steel or aluminum frame with a wall thickness of at least 1.2mm to 1.5mm is essential for commercial durability. Ensure the welding points are smooth and full (360-degree welding) to prevent structural failure under heavy use. For comfort, specify high-density cold-molded foam (density ≥45kg/m³), which retains its shape significantly longer than cut foam. Additionally, check the surface treatment, such as electrostatic powder coating or chrome plating, to ensure resistance to scratches and corrosion.