Galvanized Steel
The Hot -Dip Galvanized Plate Roll Is Produced With A Hot -Rolled Steel Belt Or A Cold -Rolled Steel Belt, Which Is Produced By A Continuous Heat -Soaking Galvanized Process. The Hot -Galvanized Rolls Supplyed By Curls Were Taken. The Hot -Dip Galvanized Plate Roll Can Therefore Be Divided Into Hot -Rolled Galvanized Plate Rolls And Cold -Rolled Galvanized Plate Rolls, Which Are Used In Construction, Home Appliances, Automobiles, Containers, Transportation, And Family Business.
| Grade | Yield Strength/Mpa | Tensile Strength/Mpa | Elongation/% |
| DX51D+Z | ≤360 | ≤440 | ≥20 |
| Dx52D+Z | ≤260 | 330-390 | ≥28 |
| DX53D+Z | ≤200 | 270-320 | ≥38 |
| DX54D+Z | ≤180 | 270-310 | ≥40 |
| S250GD+Z | ≥250 | ≥330 | ≥19 |
| S350GD+Z | ≥350 | ≥420 | ≥16 |
| S450GD+Z | ≥450 | ≥510 | ≥14 |
| S550GD+Z | ≥550 | ≥560 | / |
Applications
Galvanized coil features lightweight, aesthetics, and excellent corrosion resistance. It can be used directly or as the base metal for PPGI steel. Therefore, GI coil has been a new material for many fields, such as construction, shipbuilding, vehicle manufacturing, furniture, home appliances, etc.
1. Construction
They are often used as roofing sheets, interior and exterior wall panels, door panels and frames, the surface sheet of the balcony, ceiling, railings, partition walls, windows, and doors, gutter, sound insulation walls, ventilation ducts, rainwater pipes, rolling shutters, agricultural warehouses, etc.
2. Home Appliances
GI coil is widely applied to home appliances, such as the back panel of air conditioners, and the outer casing of washing machines, water heaters, refrigerators, microwave ovens, switch cabinets, instrument cabinets, etc.
3. Transportation
It is mainly used as decorative panels for cars, corrosion-resistant parts for cars, decks of trains or ships, containers, road signs, isolation fences, ship bulkheads, etc.
4. Light Industry
It is ideal for making chimneys, kitchen utensils, garbage cans, paint buckets, etc. At GNEE Steel, we also make some galvanized products, such as chimney pipes, door panels, corrugated roofing sheets, floor decks, stove panels, etc.
5. Furniture, such as wardrobes, lockers, bookcases, lampshades, desks, beds, bookshelves, etc.
QUALITY CONTROL
GNEE STEEL Have The Strictest Product Quality Control System, Which Starts From The Purchase Of Raw Materials. During The Production, Packaging And Transportation, We Have To Strictly Refer To The Specifications.
| Inspection Item | Technical Requirements |
| Appearance |
1) Mainly check that the steel sheet surface has no obvious discoloration, oxidation, rust spots, or defects. At the same time, evaluate the uniformity and consistency of the coating layer. The zinc coating shall be even, without obvious streaks, corrosion, scratches, dents, or substrate exposure. 2) Model, specifications, and labeling must meet inspection requirements. |
| Packaging Requirements | The outer packaging must have product name, model, batch number, quantity, and other labels with clear text. Packaging must provide waterproof and anti-corrosion protection. |
| Dimensions | Thickness (mm): Standard thickness ±0.05 Width (mm): Standard width before slitting; width after slitting ±0.5 |
| Zinc Coating Weight (Double-sided) g/m² | Three-point test average value |
| Acid Resistance Test | Immerse the galvanized steel sheet in acidic solution for a certain time, then observe corrosion on the surface. According to standards, the steel sheet shall show no obvious corrosion spots. |
| Yield Strength Rel MPa | 140-300 |
| Tensile Strength Rm MPa | 270-420 |
| Elongation After Fracture A80 mm % | ≥ 26 |
| Salt Spray Test ★ | Conducted according to MWE-WWQM099 Salt Spray Test Procedure.Must pass continuous salt spray test for 21 hours. |
| Inspection Standard | GB/T 2518-2008 Continuous Hot-dip Zinc-coated Steel Sheet and Strip |
| Notes | Items marked with ★ are type tests; |
Material Comparison
| Chinese Standard | Japan Standard | European Standard |
| DX51D Z/DC51D Z (CR) | SGCC | DX51D Z |
| DX52D Z/DC52D Z | SGCD1 | DX52D With |
| DX53D Z/DC53D Z/DX54D Z/DC54D Z | SGCD2/SGCD3 | DX53D Z/DX54D Z |
| S220/250/280/320/350/550GD Z | SGC340/400/440/490/570 | S220/250/280/320/350GD Z |
| DX51D Z/DD51D Z (HR) | SGHC | DX51D Z |
