S350GD High Strength Structural Galvanized Coil Sheet 2.0mm Purlin Frame Grade

Structural steel does not have to be heavy to be strong. The S350GD High Strength Structural Galvanized Coil Sheet delivers a minimum yield strength of 350 MPa together with a full galvanized coating, letting engineers design lighter purlins, frames and racking that still carry heavy loads.

Supplied by Shandong Jingwei Steel Manufacturing Co., Ltd., this high-strength grade is roll-formed into cold-formed sections for construction and industry. The combination of strength and corrosion resistance reduces steel weight, lowers freight cost and removes the need for post-galvanizing.

• 350 MPa Minimum Yield: High yield strength allows thinner, lighter sections that carry the same load as heavier mild steel.
• Weight and Cost Savings: Less steel per section lowers material and transport costs without sacrificing structural capacity.
• Integrated Corrosion Protection: The galvanized coating removes the need for painting or hot-dip dipping after fabrication.
• Excellent Roll Forming: Consistent mechanical properties deliver clean bends and accurate profiles on high-speed mills.
• High Strength-to-Weight Ratio: Ideal for purlins, trusses and racking where dead load must be minimized.
• Grade Versatility: Available in S350GD and higher S550GD grades for demanding designs.
• Certified Consistency: Mechanical properties and coating mass are verified on every heat for predictable engineering.

High-strength galvanized coil is the backbone of cold-formed construction. It is roll-formed into C and Z purlins, roof and wall battens, truss chords and mezzanine beams, where light weight and long corrosion life are both essential.

Beyond buildings it is used for storage racking, solar mounting rails, agricultural structures, guardrail posts and transport frames. Designers choose S350GD when they need maximum strength per kilogram plus a maintenance-free galvanized finish.

Coils are oiled as required, wrapped in plastic film and waterproof paper, steel-strapped and shipped eye to sky or eye to wall to protect the edges during handling.

Material is manufactured under an ISO 9001:2015 system and supplied with a mill test certificate stating yield, tensile and coating mass. Shandong Jingwei Steel Manufacturing Co., Ltd. provides engineering buyers with grade data and third-party SGS or BV inspection on request.