S550GD Pre-Painted Galvanized Coil

S550GD Pre-Painted Galvanized Coil (PPGI) represents a high-strength, corrosion-resistant steel solution that combines the exceptional durability of zinc-aluminum-magnesium coated steel with an attractive painted finish. This advanced material is manufactured through a continuous coil coating process, where a galvanized steel substrate is cleaned, pretreated, and coated with high-quality organic coatings. The S550GD base material offers a minimum yield strength of 550 MPa and a tensile strength exceeding 560 MPa, making it significantly stronger than conventional structural steels while mainta...

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Detailed Description

S350GD Pre-Painted Galvanized Coil represents a high-performance metallic material that combines structural strength with superior corrosion resistance and aesthetic appeal. This product is essentially a hot-dip galvanized steel coil with a pre-painted organic coating applied over the zinc layer, creating a multifaceted material that offers both protection and visual elegance. The designation "S350GD" follows the European standard EN 10346-2009, where "S" stands for structural steel, "350" indicates the minimum yield strength of 350 MPa, "GD" signifies hot-dip galvanizing, and the pre-painted aspect refers to the additional colored coating applied to the galvanized surface.

Product Name	S350GD Pre-Painted Galvanized Coil
Standard	ASTM,DIN,JIS,BS,GB/T, etc.
Material	S350GD
Surface	black painted, anti rust varnished, PE coated, anti rust oiled, galvaniZed, checkered, color coated
Width	600mm-1500mmor as required
Thickness	0.12mm-6.00mm or as required
Technical Methods	Hot Rolled/Cold rolled
Coil ID	508-610mm or as per your request
Packaging	According to customer required
Coil Weight	3-5 Tons, or as required
Application	Construction, machinery manufacturing, container manufacturing, shipbuilding, bridges, etc.
Packing	Standard Seaworthy Packing (Plastic film in the first layer,second layer is Kraft paper. Third layer is galvanized sheet)
MOQ	1 Ton, more quantity price will be lower
Zinc coating	30-275g/m2
Color	Standard Color: red, blue, White, Gray Special Colors: based on Ral colors

Key Features and Advantages

Exceptional Corrosion Resistance: The zinc-aluminum-magnesium coating provides 10-20 times better corrosion resistance compared to standard galvanized coatings, approaching the performance level of stainless steel in many environments. The coating exhibits self-healing properties at cut edges and drilled holes, preventing red rust formation and eliminating the need for additional edge protection treatments.
Superior Mechanical Properties: With a yield strength ≥550 MPa and tensile strength ≥560 MPa, S550GD PPGI offers outstanding structural performance while allowing for weight reduction in applications. The material maintains excellent formability and can be subjected to deep drawing, bending, and other forming operations without compromising its protective qualities.
Enhanced Surface Durability: The pre-painted finish provides additional protection against UV radiation, chemical exposure, and physical abrasion. Various coating systems are available including PE (Polyester), SMP (Silicone Modified Polyester), HDP (High Durability Polyester), and PVDF (Polyvinylidene Fluoride), each offering different levels of durability and weather resistance.
Aesthetic Versatility: Available in a wide range of colors according to RAL standards, with custom colors and patterns (including wood grain, brick, floral, and other designs) also available to meet specific design requirements. Various surface finishes including matt, glossy, embossed, and textured appearances can be provided to suit different applications.
Excellent Welding and Fabrication Properties: The zinc-aluminum-magnesium coating reduces spatter during laser welding operations and provides consistent friction characteristics that are beneficial for stamping and forming operations.

Technical Specifications

Table 1: Standard Technical Parameters of S550GD Pre-Painted Galvanized Coil*

Parameter	Specification Range
Base Material	S550GD+Z (Zinc-Aluminum-Magnesium)
Thickness Range	0.13 mm - 2.0 mm
Width Range	600 mm - 1,600 mm
Coating Weight (Zinc layer)	30 g/m² - 275 g/m² (dual-side)
Paint Coating Thickness	Top: 10-35 μm; Back: 5-14 μm
Coil Weight	3-9 tons (customizable)
Inner Diameter	508 mm / 610 mm

Table 2: Available Coating Types and Properties

Coating Type	Characteristics	Typical Applications
PE (Polyester)	Good adhesion, formability, and cost-effectiveness	General construction, furniture
SMP (Silicone Modified Polyester)	Enhanced durability and weather resistance	Building roofs, wall panels
HDP (High Durability Polyester)	Excellent color retention and weathering resistance	Architectural applications
PVDF (Polyvinylidene Fluoride)	Superior weather resistance, chemical resistance	High-end architectural, coastal applications

Manufacturing Process

The production of S550GD Pre-Painted Galvanized Coil involves a sophisticated continuous coil coating process:

Uncoiling and Cleaning: The Galvanized Steel Coil is uncoiled and passed through cleaning stations to remove oils and contaminants.
Pretreatment: Chemical conversion coating is applied to enhance paint adhesion.
Priming: A primer coat is applied to both sides for additional corrosion protection.
Paint Application: Top and back coats are applied using precise roller coating technology.
Curing: The painted coil passes through oven sections to cure the organic coatings.
Cooling and Recoiling: The finished material is cooled and recoiled for shipment.

Applications

S550GD Pre-Painted Galvanized Coil finds applications across diverse industries:

Building and Construction: Roofing and wall systems, ceiling panels, partition walls, garage doors, and structural components benefiting from the combination of high strength and corrosion resistance.
Transportation Industry: Truck trailers, container panels, RV components, and automotive parts where durability and weight reduction are critical.
Household Appliances: Refrigerator, washing machine, air conditioner, and microwave oven cabinets where both aesthetic appeal and protection against humidity are required.
Furniture and Storage Solutions: Wardrobes, storage cabinets, shelving systems, and office furniture benefiting from the material's structural performance and design flexibility.
Industrial Equipment: Electrical enclosures, switchgear, cable trays, and agricultural buildings requiring superior protection against harsh environments.