Galvanized Steel Coils

Surface structure Code No. Features Application
Conventional spangle Z Spangles condensated on zinc coating under normal conditions after galvanizing. Commercial purposes
Small spangle X Surface in spangles smaller than conventional ones and due to controlled condensation of zinc coating. Applications where conventional spangles cannot meet the surface appearance requirements.
Skin passed spangle G Surface structure after special skin pass treatment. Applications of high surface quality requirements, such as color coating base plates.
Skin passed small spangle GX
Zero spangle N No visible spangles on coating surface as a result of a special production process.
Zn-Fe alloy R No spangle, gray, normally matte Applicable to further painting


Best Hot Dip Galvanized Steel Plate Supplier

Looking for a reliable hot dip galvanized steel plate supplier for your business needs? Look no further than our company! Rayiwell offers the highest quality products at competitive prices. Our hot dip steel plates have immersed the steel into a bath of molten zinc. As a result, it has a zinc coating layer on the steel’s surface. The hot-dip galvanized steel plate typically includes low-carbon steel with a maximum carbon content of 0.25%. The steel may also contain small amounts of other elements such as manganese, phosphorus, and sulfur.

The thickness of the zinc coating can vary but typically ranges from 50 to 200 microns. One can check the thickness of the coating by the length of time the steel. Rayiwell uses only the best raw materials and advanced technology in our manufacturing processes.

Premium Quality Hot Dip Steel Plate

Rayiwell hot dip galvanized steel plate is a type of steel coated with a layer of zinc through a process called hot-dip galvanization. The hot-dip galvanizing process involves several steps: surface preparation, pickling, fluxing, and immersion in molten zinc. The steel is cleaned and immersed in acid to remove rust or mill scale. It is then rinsed and fluxed to prepare the surface for the zinc coating. The steel is then immersed in a bath of molten zinc, where the zinc bonds with the steel to form a protective coating.

This process creates a barrier between the steel and the environment, protecting it from rust and other types of corrosion. Also, it is highly durable and can withstand harsh weather conditions, abrasion, and impacts. Moreover, as it is highly resistant to corrosion, it requires little to no maintenance over its lifetime. So, it saves time and money on repairs and replacement. Our plates are highly versatile and sustainable as our coating increases its life span and makes it an environmentally friendly option.

In addition to their corrosion resistance, our steel plates have superior mechanical properties. They have high tensile strength, which means they can withstand heavy loads without deformation or failure. They also have good flexibility, which allows them to change their shape without cracking or breaking.

Application Of Hot Dip Galvanized Steel Plate

As a leading supplier, we provide you the plates in different levels of thicknesses and sizes. Thus, it makes them ideal for a variety of applications. They are commonly used in construction, automotive manufacturing, and industrial applications where durability and strength are important factors.

Our hot dip galvanized steel plate is also ideal for outdoor use, as it can withstand harsh weather conditions without deteriorating. This makes these plates popular for infrastructure projects such as bridges, highways, and pipelines. Also, Rayiwell Galvanized steel plates are best for the construction industry. People can use them in roofing, walling, framings, and structural components, such as beams and columns.

Further, automakers can use them in making car body panels, chassis, and suspension components. The galvanized coating protects against rust and corrosion, improving the vehicle’s longevity. They are also useful in manufacturing refrigerators, washing machines, and other appliances.

Top Notch Hot Dip Steel Plate Manufacturer – Rayiwell

Rayiwell provides customers with high-quality hot dip galvanized steel plate at market competitive price. We pride ourselves on excellent customer service, fast delivery, and reliable products. We take quality control seriously and ensure that all our products meet the highest standards. Also, we test our galvanized steel plates to ensure they meet industry standards for corrosion resistance. Also, check their mechanical properties, and other key performance factors.

We also understand the importance of timely delivery, so we maintain a large inventory of galvanized steel plates in various sizes and thicknesses. This allows us to quickly fill orders and get our products to our customers as soon as possible. Our team of experts is always available to answer any questions and help you find the right products for your specific needs. We can guide you in selecting the right thickness and size for your application and offer advice on proper handling and storage. Contact Rayiwell HK Aluminum today to learn more and place your order!

Product Specification:

  • Galvanized hot dip steel plate DC51D,also named as hot dip galvanized steel sheet DC51D+Z and hot dip zinc coated steel plate and coil DC51D+ZF.Under Q/BQB 420 steel standard, there are DC51D+Z,DC51D+ZF which is for bending and profiling quality,DC52D+Z,DC52+ZF which is for drawing quality,DC53+Z,DC53+ZF which is for deep drawing quality,DC54D+Z,DC54D+ZF which is for special deep drawing quality,DC56D+Z,DC56D+ZF which is for extra deep drawing quality.
  • DX51D stands for galvanized steel sheet. The first D means flat steel for cold forming. The X means the rolling state is indefinite. 51 is the series number of the steel. The second D means hot dipped galvanized.
  • If the X become C, namely DC51D, it means that the substrate rolling state is cold rolling. While DD51D means that the rolling rolling state of the substrate is hot rolling.
  • What’s more, it’s easy to see DX51D-Z, DX51D-ZF or DX51D-AZ. The Z means that the galvanized coating is Zinc. ZF means that the galvanized coating is Zn-Fe alloy. AZ means that the galvanized coating is galvalume.
  • DX51D galvanized coils are produced according to EN 10346. The thickness of the zinc coating varies depending on consumers’ requirements.
  • DX51D galvanized coils are widely used for the production of steel structures, roofs, window profiles, drainage and ventilation systems, roads barriers, bridges, and household appliances (cases and internal parts).
  • DX51D steel products are produced in coils 0.4-1.6 mm thick and 950-1250 mm wide. The inner diameter of the coil is 600±20 mm and outer diameter is up to 1300 mm. Coil weight is up to 8 tons. Coils are supplied with cut edges (mill edges are also possible).
  • Chemical composition and mechanical properties according to EN 10346.

Note: Tolerances for dimensions and shapes are outlined in EN 10143 (tolerances for width are for coils a minimum of 0.7 mm thick).

Note: Requirements for forming and weldability of finished products should be taken into consideration when ordering the weight of zinc coating.

Applications and features are given as following table:

Steel Grade Application Feature
DC51D+Z (St01Z, St02Z, St03Z) , DC51D+ZF Commercial purpose Low carbon and/or ultra-low carbon steel
DC52D+Z (St04Z), DC52D+ZF Drawing
DC53D+Z (St05Z), DC53D+ZF Deep drawing Ultra-low carbon steel
DC54D+Z (St06Z), DC54D+ZF Extra deep drawing
DD54D+Z (St06ZR)
DC56D+Z (St07Z), DC56D+ZF Supreme extra deep drawing

Chemical Composition %:

C Si Mn P
Cold Rolled Steel Sheet DC51D+Z (St01Z, St02Z, St03Z) , DC51D+ZF ≤0.10 ≤0.50 ≤0.035
DC52D+Z (St04Z), DC52D+ZF ≤0.08 ≤0.45 ≤0.030
DC53D+Z (St05Z), DC53D+ZF ≤0.08 ≤0.40 ≤0.030
DC54D+Z (St06Z), DC54D+ZF ≤0.01 ≤0.10 ≤0.30 ≤0.025
DC56D+Z (St07Z), DC56D+ZF ≤0.01 ≤0.10 ≤0.30 ≤0.025
Hot Rolled Steel Sheet DD51D+Z (St01ZR, St02ZR) ≤0.10 ≤0.50 ≤0.035
DD54D+Z (St06ZR) ≤0.01 ≤0.10 ≤0.30 ≤0.025


Mechanical Performances & Coating Adhesiveness
Grade Mechanical performances Coating Adhesiveness
Yield Strength MP Tensile Strength MP ≥ After Breakage Percent Elongation (LO=80mm,b=20mm)% ≥ Bending Center Diameter in Following Coating Weight (g/m2)c (a=plate thickness)
Under following nominal thickness mm ≤140/140 >140/140~175/175 >175/175
≤0.7 >0.7
DC51D+Z (St01Z, St02Z, St03Z) , DC51D+ZF 270~500 20 22 0a 1a 2a
DC52D+Z (St04Z), DC52D+ZF 140~300 270~420 24 26
DC53D+Z (St05Z), DC53D+ZF 140~260 270~380 28 30
DC54D+Z (St06Z) 140~220 270~350 34 36
DC54D+ZF 32 34
DC56D+Z (St07Z) 120~180 270~350 38 40
DC56D+ZF 36 38


Surface Treatment
Chromate treatment (L) Chromate treatment is a chemical treatment with an aim to prevent white rusts formed on product surfaces during transportation and storage.
Oiling (Y) Oiling is to prevent white rusts formed on product surfaces during transportation and storage.
Chromate treatment+ Oiling (LY) Chromate treatment+ Oiling (LY) This treatment with oiling after surface chromate treatment is to further avoid the forming of white rusts.

Surface quality:

Code No. Features
FB (O3) It is allowed for the existence of small erosion spots, dark spots, strip marks, minor chromate treatment defects and small zinc particles.
FC (O4) No erosion spot is allowed. However, it is allowed for the existence of light impression, scratches, zinc flow ripple marks, minor chromate treatment defects in small range, while the other side must reach FB requirements at least.
FD (O5) One side of relatively good quality must further restrict on defects, namely appearance quality after painting is not affected, and the other side must reach FB requirements at least.

Steel grade reference list of the standards, the cited standards and other standards:

Q/BQB 420-2003 EN10142:2000 EN10147:2000 EN10292:2000 EN 10142:1990 EN 10147:1991 JISG3302-1994 ASTMA653M-2002
DC51D+Z (St01Z, St02Z, St03Z) , DC51D+ZF DC51D+Z, +ZF FeP02GZ, ZF SGCC CS type C
DC52D+Z (St04Z), DC52D+ZF DC52D+Z, +ZF FeP03GZ, ZF SGCC CS type A, type B
DC53D+Z (St05Z), DC53D+ZF DC53D+Z, +ZF FeP05GZ, ZF SGCD1 FS type A, type B
DC54D+Z (St06Z), DC54D+ZF DC54D+Z, +ZF FeP06GZ, ZF SGCD2 DDS
DC56D+Z (St07Z), DC56D+ZF DC56D+Z, +ZF DX56D+Z, +ZF (SEW 021) SGCD3 EDDS
Q/BQB 420 Hot-dip galvanized/zinc-iron alloy/zinc-magnesium alloy coated steel sheet and strip
Steel Name Hot dip galvanized/cold rolled substrate Hot dip galvanized/ hot rolled substrate Zinc iron alloy Zinc magnesium alloy
Mild steel or interstitial-free steel DC51D+Z DD51D+Z DC51D+ZF DC51D+ZM
Carbon structural steel or low alloy steel S220GD+Z S220GD+ZF S220GD+ZM
S250GD+Z S250GD+ZF S250GD+ZM
S280GD+Z S280GD+ZF S280GD+ZM
S320GD+Z S320GD+ZF S320GD+ZM
S350GD+Z S350GD+ZF S350GD+ZM
S550GD+Z S550GD+ZM
Interstitial-free high-strength steel HC180YD+Z HC180YD+ZF HC180YD+ZM
B240P1D+Z B240P1D+ZF B240P1D+ZM
Bake Hardened Steel HC180BD+Z HC180BD+ZF HC180BD+ZM
Low Alloy High Strength Steel HC260LAD+Z HC260LAD+ZF HC260LAD+ZM
Duplex steel HC250/450DPD+Z HC250/450DPD+ZF HC250/450DPD+ZM
HC300/500DPD+Z HC300/500DPD+ZF HC300/500DPD+ZM
HC280/590DPD+Z HC280/590DPD+ZF HC280/590DPD+ZM
HC340/590DPD+Z HC340/590DPD+ZF HC340/590DPD+ZM
B340/590DPD+Z B340/590DPD+ZF B340/590DPD+ZM
HC420/780DPD+Z HC420/780DPD+ZF
HC500/780DPD+Z HC500/780DPD+ZF
HC550/980DPD+Z HC550/980DPD+ZF
HC650/980DPD+Z HC650/980DPD+ZF
HC700/980DPD+Z HC700/980DPD+ZF
HC740/1180DPD+Z HC740/1180DPD+ZF
HC820/1180DPD+Z HC820/1180DPD+ZF
Transformation induced plasticity steel HC380/590TRD+Z HC380/590TRD+ZF
HC400/690TRD+Z HC400/690TRD+ZF
HC420/780TRD+Z HC420/780TRD+ZF
Complex phase steel HC570/780CPD+Z HD660/760CPD+Z
Hardened Ductile Steel HC600/980QPD+Z