DX51D Galvanized Steel Tube
GengFei Steel is a manufacturer and supplier of DX51D galvanized steel pipes, providing DX51D galvanized seamless pipes, galvanized welded pipes at wholesale prices.
DX51D galvanized steel tube is a European standard galvanized steel pipe. Its base plate is hot rolled, stamping grade 51, and low-carbon steel as the base material. DX51D+Z is its hot-dip galvanized version. The hot-dip galvanized surface is plated with a layer of zinc; 140 means 140 grams of zinc is applied, and 275 means 275 grams of zinc is applied. The base plate used in hot-dip galvanizing is cold-rolled, and coating the cold-rolled plate with zinc is called galvanizing. Ordinary hot-dip galvanizing is 80 grams, and 140 and 275 are high zinc layers. The purpose of hot-dip galvanizing is to prevent steel from rusting. Compared with ordinary steel pipes, DX51D galvanized tubes have stronger corrosion resistance and longer service life, so they are widely used in construction, municipal engineering, industry, and other fields. At the same time, it has good mechanical and processing properties. It can withstand certain pressure and bending, and is easy to cut, bend, and weld, so it also has good processing performance when making various metal products and pipes.
Product Description
| Product Name | DX51D Galvanized Steel Tube |
| Standard | ASTMA53, ASTM A573, ASTM A283, GB/T 700-2006, GB/T711-2008, JIS G3101, JIS G3131, JIS G3016 |
| Material | DX51D+Z, DX52D+Z, DX53D+Z, DX54D+Z, S220GD+Z, DX51D+Z/SGCC/A653, etc. |
| Zinc Coating | 40-600g/㎡ |
| Width | 1000mm, 1219mm, 1250mm, 1500mm, or customized as required |
| Thickness | 0.1-6.5mm or customized as required |
| Surface Finish | Regular spangle, Big spangle, minimum spangle, zero spangle |
| Zinc Coating (repeated) | 30-600g/m2 |
| MOQ | 1 Ton |
The mechanical properties of DX51D galvanized steel tube include: yield strength of 270~370MPa, high strength, and hardness, which can meet the requirements of construction, transportation, and other fields. It also has good impact resistance and wear resistance, and can maintain good performance in complex environments.
At the same time, the base plate of this galvanized pipe is hot-rolled. After high-temperature rolling and cooling treatment, it has good plasticity and toughness and can meet the requirements of various forming processes. In addition to being able to perform bending, folding, welding, and other processing, it is also convenient for users to perform secondary processing.
The mechanical properties of DX51D galvanized steel tube are reflected in its minimum elongation. Specifically, when the nominal thickness of the product is greater than 0.5mm and less than or equal to 0.7mm, the minimum elongation is reduced by 2% from the value in the table; when the nominal thickness of the product is not greater than 0.5 mm, the minimum elongation is 4% less than the value in the table. If the nominal thickness of the product is between 0.35mm and 0.5mm, the minimum elongation is reduced by 7% from the value in the table. In addition, the tensile test also reflects the mechanical properties of DX51D galvanized steel tube, which requires yield point, tensile strength, and elongation.
Chemical Composition of DX51D Galvanized Steel Tube
| Element | Carbon (C) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Aluminum (Al) | Nitrogen (N) | Silicon (Si) |
| Content (Max% % by Weight) | 0.12% | 0.60% | 0.10% | 0.05% | 0.015 – 0.07% | 0.01% | 0.50% (max) |
Mechanical Properties of DX51D Galvanized Steel Tube
| Property | Value/Range |
| Tensile Strength (Rm) | 270 – 500 MPa |
| Yield Strength (Re) | Minimum 140 MPa |
| Elongation (A80) | Minimum 22% (for thickness > 0.7 mm *) |
| Vickers Hardness (HV) | 70 – 120 HV |
| Brinell Hardness (HB) | Approx. 50 – 75 HB |
| Rockwell Hardness (HRB) | Approx. 50 – 70 HRB |
| Elastic Modulus (E) | Approximately 210 GPa |
*(Thickness) t≤0.5mm, elongation reduced by 4%; 0.5mm＜t≤0.7mm, elongation reduced by 2%.
Application of DX51D Galvanized Steel Tube
- Firefighting facilities: Galvanized steel pipes are corrosion-resistant and rust-resistant, and they are widely used in firefighting water pipes. They are often painted red as a logo.
- Steel structure welding projects: Galvanized pipes replace welded steel pipes, which is time-saving and durable, especially suitable for steel structure projects.
- Scaffolding: Galvanized pipes replace traditional welded steel pipes due to their good anti-rust performance and are widely used in building scaffolding.
- Manufacturing: Used in machinery manufacturing, transportation, automobiles, agricultural machinery, and other industries to provide corrosion protection and strength support.
- High-tech fields: Used in aerospace, nuclear energy, and other fields, and are valued for their corrosion resistance and aesthetics.
+Z275 means the zinc layer weight is 275 grams per square meter. In addition to +Z (for hot-dip galvanizing), DX51D can also be represented by other symbols according to different surface treatments and coating methods:
+ZF: Electroplated zinc/zinc-iron alloy coating, good wear resistance, commonly used in home appliances and automobiles.
+AZ: Alu-zinc coating, strong corrosion resistance, suitable for building exterior walls and high temperature environments.
+AS: Alu-silicon coating, high temperature resistance, used in equipment such as automobile exhaust and ovens.
+AL: Aluminum coating, anti-oxidation, used for high-temperature equipment.
+P: Color coating/organic coating, anti-corrosion, and beautiful, suitable for roof and wall panels.
Application
Agricultural Modernization
Construction Engineering
Environmental Protection Engineering
Food Processing Industry
Intelligent Home Appliances
Medical and Health Field
New Energy Infrastructure
