Seamless square tube
Seamless square tube
Seamless pipe is a long steel strip with a hollow section and no joints on the periphery.Seamless steel pipes are widely used in the transportation of petroleum, natural gas, gas, water, and certain solid materials.1. According to different production methods, seamless steel pipes can be divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes, and extruded pipes.
2. According to the shape, there are round pipes and special-shaped pipes. In addition to square tubes and rectangular tubes, special-shaped tubes also include oval tubes, semicircular tubes, triangular tubes, hexagonal tubes, convex-shaped tubes, plum-shaped tubes, etc.
3. According to different materials, it can be divided into ordinary carbon structure tube, low alloy structure tube, high quality carbon structure tube, alloy structure tube, stainless tube, etc.
4. According to the special purpose, there are boiler tubes, geological tubes, oil tubes, etc.
Seamless square tube Features
- Seamless steel pipes are widely used in the transportation of petroleum, natural gas, gas, water, and certain solid materials because of their hollow section and no joints around them.
- Compared with other steel pipes, seamless steel pipes have strong advantages in terms of bending resistance.
- The seamless steel pipe is light in weight and is a very economical cross-section steel.
- The corrosion resistance of seamless steel pipes is resistant to acid, alkali, salt and atmospheric corrosion, high temperature resistance, good impact resistance and fatigue resistance, no regular maintenance, and effective service life of up to 15 years;
- The tensile strength of seamless steel pipe is more than 8-10 times that of ordinary steel, the modulus of elasticity is better than that of steel, and it has excellent creep resistance, corrosion resistance and shock resistance;
- The seamless steel pipe has excellent mechanical properties and easy machining, etc.;
- The seamless steel pipe is highly elastic, reusable in mechanical equipment, no memory, no deformation, and antistatic.
Seamless square tube Equivalent Material
| Grade | Euronorm | China GB | |
| 20# | C22、C20C | GB/T8163-2008 | |
Seamless square tube Standard Specification
| Thickness | 2.5mm-75mm | ||||||
| OD | 5mm-630mm | ||||||
| Length | 1000mm-10000mm | ||||||
Seamless square tube Metal Content
| Grade | Element | C | Si | Mn | P | S | Ni | Cr | Cu |
| 20# | 0.17～0.24" | 0.17～0.37 | 0.35～0.65 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 | ≤0.25 |
- Tensile strength σb (MPa): ≥410(42)
- Yield strength σs (MPa): ≥245(25)
- Elongation δ5 (%): ≥25
- Reduction of area ψ (%): ≥55
- Hardness: not heat-treated, ≤156HB
Seamless square tube Processing technology
Tube blank - inspection - peeling - inspection - heating - perforation - pickling - grinding - lubricating and air drying - welding head - cold drawing - solution treatment - pickling - pickling Passivation-Inspection-Cold Rolling-Degreasing-Cutting Head-Air Drying-Internal Polishing-External Polishing-Inspection-Marking-Finished Product Packaging
Seamless square tube Features
| Seamless square tube | FOB Shanghai Per Unit (USD) | |||||||
| $660~2500 | ||||||||
