We offer a full range of stainless steel products, from pipes to plates, coils to profiles, to meet the needs of your diverse projects.
Royal Group, founded in 2012, is a high-tech enterprise focusing on the development, production and sales of architectural products. Our headquarter is located in Tianjin, the national central city and the birthplace of "Three Meetings Haikou". We also has branches in major cities across the country.
OUR CARBON STEEL COILS
We offer a full range of carbon steel products, from pipes to plates, coils to profiles, to meet the needs of your diverse projects.
OUR STEEL COILS
Galvanized steel coil is a metal coil made by hot-dip galvanizing or electroplating cold-rolled steel sheets, depositing a layer of zinc on the surface.
Zinc Coating Thickness: Hot-dip galvanized coil typically has a zinc coating thickness of 50-275 g/m², while electroplated coil typically has a zinc coating thickness of 8-70 g/m².
The thicker zinc coating of hot-dip galvanizing provides longer-lasting protection, making it suitable for buildings and outdoor applications with stringent corrosion protection requirements.
Electroplated zinc coatings are thinner and more uniform, and are commonly used in automotive and appliance parts requiring high surface precision and coating quality.
Zinc Flake Patterns: Large, Small, or No Spangles.
Widths: Commonly available: 700 mm to 1830 mm, meeting the processing needs of various industries and product specifications.
Galvalume steel coil is a metal coil made from a cold-rolled steel substrate, coated with an alloy layer composed of 55% aluminum, 43.4% zinc, and 1.6% silicon via a continuous hot-dip galvanizing process.
Its corrosion resistance is 2-6 times that of ordinary galvanized coil, and its high-temperature resistance is outstanding, allowing it to withstand long-term use at 300°C without significant oxidation.
The alloy layer thickness is typically 100-150g/㎡, and the surface exhibits a distinctive silver-gray metallic luster.
Surface conditions include: normal surface (no special treatment), oiled surface (to prevent white rust during transportation and storage), and passivated surface (to enhance corrosion resistance).
Widths: Commonly available: 700mm - 1830mm.
Color-coated coil is a novel composite material made from a galvanized or galvanized steel coil substrate, coated with one or more layers of organic coatings (such as polyester, silicone-modified polyester, or fluorocarbon resin) via roller coating or spraying.
Color-coated coil offers two advantages: 1. It inherits the corrosion resistance of the substrate, resisting erosion by moisture, acidic and alkaline environments, and 2. The organic coating provides a rich variety of colors, textures, and decorative effects, while also offering wear resistance, weather resistance, and stain resistance, extending the service life of the sheet.
The coating structure of color-coated coil is generally divided into a primer and a topcoat. Some high-end products also have a backcoat. The total coating thickness typically ranges from 15 to 35μm.
Width: Common widths range from 700 to 1830mm, but customization is possible. The substrate thickness typically ranges from 0.15 to 2.0mm, adapting to different load-bearing and forming requirements.
We offer a full range of carbon steel products, from pipes to plates, coils to profiles, to meet the needs of your diverse projects.
OUR STAINLESS STEEL COILS
Stainless Steel Surface Conditions
No.1 Surface (Hot-Rolled Black Surface/Pickled Surface)
Appearance: Dark brown or bluish black (covered by oxide scale) in the black Surface state, off-white after pickling. The surface is rough, matte, and has noticeable mill marks.
2D Surface (Cold-Rolled Basic Pickled Surface)
Appearance: The surface is clean, matte gray, lacking noticeable gloss. Its flatness is slightly inferior to that of the 2B surface, and slight pickling marks may remain.
2B Surface (Cold-Rolled Mainstream Matte Surface)
Appearance: The surface is smooth, uniformly matte, without noticeable grains, with high flatness, tight dimensional tolerances, and a delicate touch.
BA Surface (Cold-Rolled Bright Surface/Mirror Primary Surface)
Appearance: The surface exhibits a mirror-like gloss, high reflectivity (over 80%), and is free of noticeable blemishes. Its aesthetics are far superior to the 2B surface, but not as exquisite as a mirror finish (8K).
Brushed Surface (Mechanically Textured Surface)
Appearance: The surface features uniform lines or grains, with a matte or semi-matte finish that hides minor scratches and creates a unique texture (straight lines create a clean, random lines create a delicate effect).
Mirror Surface (8K Surface, Extremely Bright Surface)
Appearance: The surface exhibits a high-definition mirror effect, with a reflectivity exceeding 90%, providing clear images without any lines or blemishes, and a strong visual impact.
Colored Surface (Coated/Oxidized Colored Surface)
Appearance: The surface features a uniform color effect and can be combined with a brushed or mirrored base to create complex textures such as "colored brushed" or "colored mirror." The color is highly durable (PVD coating is heat-resistant up to 300°C and is not prone to fading).
Special Functional Surfaces
Fingerprint-Resistant Surface (AFP Surface), Antibacterial Surface, Etched Surface