Galvanized Steel Coil gets coated in layers of zinc because rust won't attack this protective metal. The most external layer is all zinc, but successive layers are a mixture of zinc and iron, with an interior of pure steel. These multiple layers are responsible for the amazing property of the metal to withstand corrosion-inducing circumstances. Zinc also protects the steel by acting as a "sacrificial layer." If rust does take hold on the surface of Galvanized steel Coil, the zinc will get corroded first. This allows the zinc that is spread over the breach or scratch to prevent rust from reaching the steel. For countless outdoor, marine, or industrial applications, Galvanized steel Coil is an essential fabrication component.
Hot dipped galvanized steel sheet/coil
EN10147 ASTM A 653
Zinc Alunimum Coating
Top Coating Thickness
Back Coated Thickness
15-30 days after receive deposit
30% T/T as a deposit and the balance 70% paid 7 days before shipping
Waterproof paper,galvanized steel covered and steel strip packed with iron pallet
Hot Dip Galvanized steel produced by ZHONGYUAN,is coated with zinc using a continuous and controlled process. The tight metallurgical bond between the steel and coating takes place in a continuous galvanizing line. This process results in a material with the strength and formability of steel and with the corrosion protection provided by zinc. The zinc coating protects the base metal from external corrosive elements in two main ways, by acting as (1) a physical barrier and (2) a sacrificial anode.
Tolerance on Nominal Thickness for galvanized steel
0.18 – 0.40
0.401 – 1.00
1.01 – 1.50
1.51 – 2.00
Note: Restricted gauge ranges and customized thickness tolerances can be offered on request.
Images of Galvanized steel
Zero Spangle Minimized Spangle Medium Spangle Regular Spangle
Quality Inspection for Galvanized steel
What is the Lead-Safe Limit in Zinc?
The maximum safe limit for the amount of lead in zinc specified in ASTM A653/A653M is 0.009% (90 mg/kg). Exceeding this limit may have a negative impact on the product performance, such as delayed adhesion failure and spangle darkening. Further, excess levels of lead are harmful to human health, especially via the inhalation of fumes and dust generated during the welding and grinding operations performed during fabrication using galvanized steel and when this product is used in applications involving direct contact with human beings or indirect contact via the air, water, and soil, such as in storage tanks and water pipe lines. UNICOIL strictly complies with the lead-safe limit in zinc, and actually provides product with much lower values of lead (e.g., 60 mg/kg). UNICOIL uses high-purity zinc (minimum of 99%), which is procured from vendors approved by the London Metal Exchange.
What is the Mandatory Minimum Zinc Coating of Galvanized Steel?
The mandatory Minimum zinc coating as per SASO ASTM A653M-A1-15 is 60 gsm (grams per square meter) in order to deliver the minimum expected product performance and life span. Applications that are closer to the sea, offshore, or in urban areas will require a heavier zinc coating. The thickness of the steel also significantly affects the product performance and its life span, and should be determined based on the final product end use and the site of installation.
To prevent staining during storage and in transit, the galvanized coils are lightly oiled or subjected to online chemical passivation treatment. Hot-dip coatings are specified in a wide range of coating mass categories.
Triple Spot Test (Total both sides) minimum
Single Spot Test (Total both sides) minimum
G30 / Z90
G40 / Z120
G60 / Z180
G90 / Z275
G115 / Z350
Note: coating mass of 7.14 g/m2 = coating thickness of 1.00 µm
More PPGI coils
There are mainly the following products,galvanized steel coils,prepainted steel coils,galvanized round pipes,galvanized square pipes,galvanized steel sheets,etc...
Packaging & Shipping
1.Less than 400 tons of galvanized steel coils or PPGI coils can be shipped by 20’’ or 40’’ foot container.
2.More than 400 tons galvanized steel coils or PPGI coils can be transported by bulk ship.
3.About containers, the details are as follow:
20'' foot container contains dimension;Width under 2300mm, length under 6000mm;
40'' foot container contains dimension;Width under 2300mm, length under 12000mm.
Zhongyuan Metal Material Co.,Ltd can supply high quality with lowest prices for you.
We can promise to deliver all products timely
About US Taian Zhongyuan Metal Material Co., Ltd. was established in 2012, with a total area of 50,000 square meters. More than 216 employees, including more than 40 professional and technical personnel. Now our company is a large-scale steel industry and trade company integrating production, deep processing and trade.
Zhongyuan Company is committed to professional production of galvanizing.Aluminized galvanized steel sheets, prepainted galvanizing steel coils, galvalume steel coil, textured board, printed board and other products, can also be used for subsequent pressing, flattening, slitting, laminating, pressing diamond pattern, pressing orange peel The deep processing directly delivers the finished product that the customers need.
Zhongyuan Company has 5 color coating production lines and 3 galvanizing production lines. The production thickness is 0.12-1.2cm, the width is form 600CM to 1250CM, the galvanizing capacity is 300,000 tons per year, the color coating capacity is 500,000 tons per year.