Customizable High carbon Steel Spring for Standard and High Lift Industrial Doors

Customizable High carbon Steel Spring for Standard and High Lift Industrial Doors. Premium Material Construction: Made of high carbon steel and 60Si2MnA alloy steel for high hardness and strong bearing capacity. Long Service Life: Professional heat treatment ensures over 18,000 open and close cycles with stable performance. Anti-Rust Surface Treatment: Available in powder coated, galvanized, oiled, and electrophoretic options for various environments. Full Customization Support: Customizable wire diameter, inner diameter, length, color, and loading weight to match specific needs. Strict Quality Inspection: 100% inspection before shipment including tension, hardness, and fatigue resistance tests. SGS Certified Quality: All products come with SGS test reports, material certificates, and factory inspection reports. Fast Delivery Options: 7-15 working days for formal orders and 3-5 days for sample orders with sufficient stock. Professional Technical Support: Expert team available to solve installation and matching problems for global customers.