High Quality Galvanized Square Pipe Rectangular Tube Gi Steel for Construction

Product Description

Basic info.

Galvanizing refers to a surface treatment technology that coats a layer of zinc on the surface of metals, alloys or other materials for aesthetics and anti-rust effects. The main method used is hot-dip galvanizing.
Zinc is easily soluble in acid and alkali, so it is called amphoteric metal. Zinc hardly changes in dry air. In humid air, a dense basic zinc carbonate film will be formed on the surface of zinc. In the atmosphere containing sulfur dioxide, hydrogen sulfide and marine atmosphere, the corrosion resistance of zinc is poor, especially in the atmosphere of high temperature, high humidity and organic acid, the zinc coating is easily corroded. The standard electrode potential of zinc is -0.76V. For the steel substrate, the zinc coating is an anodic coating. It is mainly used to prevent the corrosion of steel. The quality of its protective performance is closely related to the thickness of the coating. After the zinc coating is passivated, dyed or coated with light protection agent, its protection and decoration can be significantly improved.

Dimensions Table
Specification	Zinc layer	Material
0.20*1000*C	80	DX51D+Z
0.25*1000*C	80	DX51D+Z
0.3*1000*C	80	DX51D+Z
0.35*1000*C	80	DX51D+Z
0.4*1000*C	80	DX51D+Z
0.5*1000*C	80	S280GD+Z
0.5*1000*C	80	DX51D+Z
0.58*1000*C	80	S350GD+Z
0.6*1000*C	80	DX51D+Z
0.7*1000*C	80	DX51D+Z
0.75*1000*C	80	DX51D+Z
0.8*1000*C	80	DX51D+Z
0.8*1000*C	80	DX53D+Z
0.85*1000*C	80	DX51D+Z
0.9*1000*C	80	DX51D+Z
0.98*1000*C	80	DX51D+Z
0.95*1000*C	80	DX51D+Z
1.0*1000*C	80	DX51D+Z
1.1*1000*C	80	DX51D+Z
1.2*1000*C	80	DX51D+Z
1.2*1050*C	150	CSB
1.4*1000*C	80	DX51D+Z
1.5*1000*C	80	DX51D+Z
1.55*1000*C	180	S280GD+Z
1.55*1000*C	180	S350GD+Z
1.6*1000*C	80	DX51D+Z
1.8*1000*C	80	DX51D+Z
1.9*1000*C	80	DX51D+Z
1.95*1000*C	180	S350GD
1.98*1000*C	80	DX51D+Z
1.95*1000*C	180	S320GD+Z
1.95*1000*C	180	S280GD+Z
1.95*1000*C	275	S350GD+Z
2.0*1000*C	80	DX51D+Z
0.36*1250*C	80
0.4*1250*C	80	DX51D+Z
0.42*1250*C	80	DX51D+Z
0.45*1250*C	225	S280GD+Z
0.47*1250*C	225	S280GD+Z
0.5*1250*C	80	SGCC
0.55*1250*C	180	S280GD+Z
0.55*1250*C	225	S280GD+Z
0.6*1250*C	80	DX51D+Z
0.65*1250*C	180	DX51D+Z
0.7*1250*C	80	DX51D+Z
0.7*1250*C	80	SGCC
0.75*1250*C	80	DX51D+Z
0.8*1250*C	80	DX51D+Z
0.9*1250*C	80	DX51D+Z
0.95*1250*C	80	DX51D+Z
1.0*1250*C	80	DX51D+Z
1.15*1250*C	80	DX51D+Z
1.1*1250*C	80	DX51D+Z
1.2*1250*C	80	DX51D+Z
1.35*1250*C	80	DX51D+Z
1.4*1250*C	80	DX51D+Z
1.5*1250*C	80	DX51D+Z
1.55*1250*C	80	DX51D+Z
1.6*1250*C	120	SGCC
1.6*1250*C	80	DX51D+Z
1.8*1250*C	80	DX51D+Z
1.85*1250*C	90	DX51D+Z
1.95*1250*C	80	DX51D+Z
1.75*1250*C	80	DX51D+Z
2.0*1250*C	80	DX51D+Z
2.0*1250*C	120	SGCC
2.5*1250*C	80	DX51D+Z

 
Galvanized coil, a thin steel sheet that is dipped in a bath of molten zinc to adhere a layer of zinc to its surface. It is mainly produced by the continuous galvanizing process, that is, the coiled steel plate is continuously dipped in the galvanizing tank with molten zinc to make galvanized steel plate; alloyed galvanized steel plate. This kind of steel panel is also made by hot dip method, but it is heated to about 500ºC immediately after coming out of the tank, so that it can form an alloy film of zinc and iron. This galvanized coil has good paint adhesion and weldability.


 

Galvanized sheet refers to a steel sheet coated with a layer of zinc on the surface. Galvanizing is an economical and effective rust prevention method that is often used, and about half of the world's zinc production is used in this process.
 

Standard	ASTM, AISI, DIN, GB, EN, JIS etc
Grade	SGCC, DC51D, DX51D, DX52D, SGCD, SGHC, DX54D, S350GD, S450GD, S550GD etc
Thickness	0.12mm-4.0mm or 0.8mm/1.0mm/1.2mm/1.5mm/2.0mm,etc
Width	600mm, 762mm, 914mm, 1000mm, 1200mm, 1219mm, 1250mm, 1500mm
Zinc Coating	Z40-Z275g/m2, or as clients required
Spangle	Big,regular,mini or zero spangle
Hardness	Soft or hardness, as clients required
Packing	Waterproof paper+plastic film+iron packing+bundling or as per customers request
Application	Ceiling channel,industrial refrigeration,cold storage,sandwich panel,PU panel,writing board,PCM steel plate
Delivery time	In 15-30 after receipt advance or LC
Payment	T/T or L/C at sight
Min order	25 Mt (one 20ft FCL)

 

index

Galvanized sheet and strip steel products are mainly used in construction, light industry, automobile, agriculture, animal husbandry, fishery and commercial industries. Among them, the construction industry is mainly used to manufacture anti-corrosion industrial and civil building roof panels, roof grids, etc.; the light industry industry uses it to manufacture home appliance shells, civil chimneys, kitchen utensils, etc., and the automobile industry is mainly used to manufacture corrosion-resistant parts of cars, etc. ; Agriculture, animal husbandry and fishery are mainly used for grain storage and transportation, frozen meat and aquatic products, etc.; commercial is mainly used for storage and transportation of materials, packaging equipment, etc.

Hot-dip galvanized steel sheet (coil) surface treatment
L Chromate passivation;
Y Oiled;
LY chromic acid passivation plus oiling;
GZ skin pass machine;

Surface Structure Features Uses
Normal spangle (Z) After galvanizing, the zinc layer is still condensed under normal conditions. General purpose;
Skin-passing spangle (GZ) The skin-passing machine is used to lighten the galvanized sheet and smooth the spangle on the surface of the galvanized sheet. It is mainly used as the substrate of the color-coated sheet;



Processability      Yield strength      Tensile strength       Elongation% 180o     cold bending
Ordinary PV - 270-500 - d=0, intact, no dezincification Deep drawing SC - 270-380 ≥30 d=0, intact, no dezincification;
Mechanical interlocking JY - 270-500 - d=0, intact, without dezincification Super deep drawing SC - 270-380 ≥30 d=0, intact, without dezincification;
Structure JG ≥240 ≥370 ≥18 d=0, intact, no dezincification.
 

Use galvanized steel over uncoated steel or other coated materials. Galvanneal is primarily designed for spray painting. The matte finish of the zinc coating is more absorbent than standard galvanized steel, allowing paint to adhere to the surface better. Galvanized steel also has a harder zinc coating than many other types of galvanized steel. This increases its resistance to scratches and other types of coating damage that could expose the underlying steel to the environment. The formability and weldability of galvanized coatings are generally superior to other types of galvanized steel.
 

Detailed Photos

 

Features

A thick and dense layer of pure zinc covers the surface of the steel fastener, which can prevent the steel substrate from contacting any corrosive solution and protect the steel fastener substrate from corrosion. In the general atmosphere, a thin and dense layer of zinc oxide is formed on the surface of the zinc layer. It is difficult to dissolve in water, so it has a certain protective effect on the steel fastener matrix. If zinc oxide and other components in the atmosphere form insoluble zinc salts, the anti-corrosion effect is more ideal; it has a zinc-iron alloy layer, which is densely combined, and exhibits unique corrosion resistance in marine salt spray atmospheres and industrial atmospheres; due to the combination Strong, zinc-iron mutual solubility, strong wear resistance; due to the good ductility of zinc, its alloy layer is firmly attached to the steel substrate, so hot-dip galvanizing can be used for cold punching, rolling, drawing, bending, etc. The forming process does not damage the coating; after the steel structure is hot-dip galvanized, it is equivalent to an annealing treatment, which can effectively improve the mechanical properties of the steel substrate, eliminate the stress of the steel forming and welding, and facilitate the turning of the steel structure; The surface of the fastener after galvanizing is bright and beautiful; the pure zinc layer is the most plastic galvanized layer in hot-dip galvanizing, its properties are basically close to pure zinc, and it has good ductility.

The requirements for the chemical composition of galvanized sheet substrates vary from country to country. The national standards generally detect the content of carbon, manganese, phosphorus, sulfur and silicon.
 

Application

This plating method is especially suitable for strong corrosive environments such as various strong acids and alkali mist.

1.The construction industry is mainly used to manufacture anti-corrosion industrial and civil building roof panels, roof grids, etc.;

2.The light industry industry uses it to manufacture home appliance shells, civil chimneys, kitchen utensils, etc.,

3.The automobile industry is mainly used to manufacture corrosion-resistant parts of cars, etc.;

 4.Agriculture, animal husbandry and fishery are mainly used for grain storage and transportation, frozen processing equipment for meat and aquatic products, etc.;

5.Commercial use is mainly used for storage and transportation of materials, packaging equipment, etc.

 

Quality Testing

(1) Tensile test:
1.Performance indicators: Generally speaking, only galvanized sheets for structure, stretching and deep drawing have tensile performance requirements. Among them, the galvanized sheet for structure requires yield point, tensile strength and elongation, etc.; for stretching, only elongation is required. See the relevant product standards in "8" of this section for specific values;
2.Test method: the same as the test method for general thin steel plates, see the relevant standards provided in "8" and the test method standards listed in "Ordinary carbon steel thin steel plates".

(2) Bending test:
Bending test is the main item to measure the technical performance of thin plate, but the requirements of various galvanized sheets are not consistent in national standards. Except for structural grade, American standards do not require bending and tensile tests. In Japan, bending tests are required except for structural grades, architectural corrugated plates and general corrugated plates.

Requirements: It is generally required that after the galvanized sheet is bent for 180 degrees, there must be no zinc layer on the outer surface, and no cracks or breaks on the base of the sheet.
 

Packaging & Shipping

 

Divided into two kinds of galvanized sheet cut to length and galvanized sheet packaged in coils. Generally, it is packaged in iron sheet, lined with moisture-proof paper, and bound on the bracket with iron waist outside. The binding should be firm to prevent the internal galvanized sheets from rubbing against each other.

 

 

About us

Jinan Zunkai Group founded in 2002, with five branch companies and is wel-funded. Ourannual sales nearly one billion, about 300,000 tons steel. Our company is located in JinarCity, Shandong Province. We entered into a strategic partnership with Bao Steel, LaiwuSteel, Rizhao Steel, Handan Steel, Anyang Steel, Maanshan Steel and other domesticlarge steel companies. Zunkai is the largest steel agent in Shandong Province, we alsohave ourselves steel process factory with 100000 Square meter for steel laser cutting.surface treatment and other further processing , and our stock always more than 20.000tons.Zunkai Group mainly engaged in : PPGl ,galvanized steel , steel plate , round bar.steel pipe ,Stainless steel product ,angle bar, steel pile ,H beam ,l beam, angle, Channelflat steel etc . Our good quality and reliable service will be your best trusted partner.Sincerely wish to building long and regular business with you forever!


 

Our Partner

FAQ

1. Who are we?
We are based in Shandong, China, start from 2016,sell to South America(20.00%),Africa(20.00%),Southeast Asia(15.00%),Central America(10.00%),North America(5.00%),Oceania(5.00%),Mid East(5.00%),Eastern Asia(5.00%),Western Europe(5.00%),South Asia(5.00%),Domestic Market(5.00%). There are total about 11-50 people in our office.

2. How can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

3.What can you buy from us?
Galvanized Steel,Corrugated Roofing Sheet,Galvanized Coil,PPGI,Steel Plate,Steel Stainless

4. Why should you buy from us not from other suppliers?
Jinan Zunkai Group founded in 2002, with five branch companies and is well-funded. Mainly engaged in : PPGI ,galvanized steel , steel plate , round bar, steel pipe ,Stainless steel product ,angle bar, steel pile ,H beam ,I beam, angle, Channel flat steel

5. What services can we provide?
Accepted Delivery Terms: FOB, CFR, CIF, EXW, FCA;
Accepted Payment Currency:USD, EUR, JPY, HKD, CHF;
Accepted Payment Type: T/T, L/C, MoneyGram, Credit Card, PayPal, Western Union, Cash