Square and Rectangular Steel Tube
Product Name:Square pipe,Rectangular tube,SHS,RHS,Box pipe
Standard:ASTM A500, EN10219, JIS3466, GB/T 6728,EN10219
Material:Q195,Q235,Q355
Size:Square pipe: 10x10mm to 500x500mm ;Rectangular pipe: 20x40mm to 300x500mm
Surface:Black bared ,can be galvanized,oiled,painted,powdered.
Anti-rusty coating:pre-galvanized (zinc coating: 40-80g/m2)
hot dipped galvanized (zinc coating: 200-600g/m2 )
Wall thickness:1.0mm to 30mm （pre galvainzed 0.8mm to 2.2mm）
Length:common 5.8m or 6m or 12m, or cutted as required 2m to 12m
Description:Square rectangular carbon steel pipe refers to a steel pipe made of carbon steel, with cross-sections of square and rectangular respectively.
rectangular steel tube
hot dipped galvanized: 20x40mm to 300x500mm
pre galvainzed:6x10mm to 50x100mm
square steel tube
hot dipped galvanized: 20x20mm to 500x500mm
pre galvainzed: 10x10mm to 75x75mm
Square Rectangular tube Specification
| Square Hollow Section | Rectangular Hollow Section | Wall Thickness |
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| mm | mm | mm | |
| 20*20 25*25 30*30 | 20*40 30*40 | 1.7-2.75 | |
| 40*40 50*50 | 30*50 25*50 30*60 40*60 | 1.2-4.75 | |
| 60*60 | 50*70 40*80 40*50 | 1.2-5.75 | |
| 70*70 | 60*80 50*80 100*40 | 1.5-5.75 | |
| 80*80 75*75 90*90 | 60*100 50*100 120*60 100*80 | 1.5-8.0 | |
| 100*100 | 120*80 | 1.7-8.0 | |
| 120*120 | 160*80 150*100 140*80 | 2.5-10.0 | |
| 140*140 150*150 | 100*180 200*100 | 2.5-10.0 | |
| 160*160 180*180 | 200*150 | 3.5-12.0 | |
| 200*200 | 250*150 | 3.5-12.0 | |
| 250*250 280*280 | 250*200 300*200 | 4.5-15.75 | |
| 300*300 | 350*200 350*250 400*200 | 4.5-15.75 | |
| 350*350 | 350*300 450*250 400*300 500*200 | 4.5-15.75 | |
| 400*400 500*500 | 450*300 450*200 400*350 400*250 500*250 500*300 400*600 | 4.5-20.0 |
Some Surface treatment
Galvanized:Provides excellent corrosion resistance by forming a zinc coating on the surface, protecting the steel from rust and deterioration.
Oiled:Helps prevent rust and provides some degree of lubrication, protecting the surface during storage and transportation.
Painted:Allows for customization of color, enhances the aesthetic appeal, and offers a certain level of protection against corrosion.
Powdered: Creates a durable and uniform coating that provides good corrosion resistance, hardness, and abrasion resistance.
Bare/Natural
Black Painted
Galvanized
Square Rectangular tube standard
| Steel Grade | Q195 = S195 / A53 Grade A Q235 = S235 / A53 Grade B / A500 Grade A / STK400 / SS400 / ST42.2 Q355 = S355JR / A500 Grade B Grade C |
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| Specifications |
OD: 20*20mm~500*500mm;20*40mm~300*500mm WT:1.2mm~20mm Length:2.0m~12m |
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| Anti-rusty coating | pre-galvanized (Zinc coating: 40-80g/m2) hot dipped galvanized (Zinc coating: 200-600g/m2 ) |
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| Standard | EN10219,ASTM A500 A36,GB/T 6728,JIS G3466, ,EN10210 |
ASTM A 500 & EN10219 Requirements
EN10219 is the European standard for structural steel rectangular square tube , while ASTM A 500 is the American standard for structural steel square rectangular tube.
The minimum tensile strength of hollow section square rectangular pipes in ASTM A 500 standard may be higher for pipes of specific sizes and grades.
The welding seams of square rectangular pipes in EN10219 standard may require non-destructive testing to check their integrity.
They each have their own chemical composition, mechanical properties, dimensions, and tolerance standards.
| Specifications | Chemical Requirement(%) | Physical Requirement | Elongation Min(%) | ||||||||
| C | Si | Mn | P | S | Others | Tensile Strengtr Min Mpa(Psi) | Yield Strengt Min Mpa(Psi) | Longitudinal Direction | Transverse Direction |
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| (Max) | Max) | (Max) | Max) | (Max) | |||||||
| BS EN10219 | S235JRH | 0.17 | 1.4 | 0.045 | 0.045 | 0.009(N | 360-510Mpa(<3mm 340-470Mpa(≥3≤ 40mm |
235Mpa(≤16mm 225Mpa (>16< 40mm) |
24 ≤40mm) | 20(℃) | |
| S275JOH | 0.2 | 一 | 1.5 | 0.04 | 0.04 | 0.009(N | 430-580Mpa(<3mm 410-560Mpa(=3≤ 40mm) |
975Mna(≤16mm 265Mpa (>16≤40mm |
20 ≤40mm) | 0 | |
| S275J2H | 0.2 | 1.5 | 0.035 | 0.035 | 20 | ||||||
| S355JOH | 0.2 | 0.55 | 1.6 | 0.04 | 0.04 | 0.009(N | 510-680Mpa(<3mm) 490-630Mpa(23 40mm |
355Mpa (≤16mm 345Mpa (>16≤ 40mm |
20 ≤40mm) | ||
| S355J2H | 0.2 | 0.55 | 1.6 | 0.035 | 0.035 | 20 | |||||
| ASTM A500 | A | 0.3 | 1.4 | 0.045 | 0.045 | Cu≥0.20 When Reguirec |
310Mpa (45000 psi) |
Z70Mpa 39000 psi |
25 | ||
| B | 0.3 | 1.4 | 0.045 | 0.045 | 400Mpa (58000 psi |
315Mpa (46000 psi |
23 | ||||
| C | 0.27 | 1.4 | 0.045 | 0.045 | 425Mpa 62000 psi) |
345Mpa 50000 psi |
21 | ||||
| D | 0.3 | 1.4 | 0.045 | 0.045 | 400Mpa 58000 psi) |
250Mpa (38000 psl |
23 | ||||
Square Rectangular Pipe manufacture
When producing a square rectangular steel pipe for building structures, Youfa Steel Pipe first selects high-quality carbon steel raw materials, cuts them into suitable blanks, and then uses hot forming technology to preliminarily shape them. After welding and weld treatment, size adjustment and heat treatment are carried out, and finally surface galvanizing treatment and quality inspection are carried out. After passing the inspection, packaging and storage are carried out.
During the production of mild steel square tube, the following steps require special attention
Forming process
Hot forming or cold forming can affect the shape and dimensional accuracy of rectangular steel tube.
High Frequency welding
The welding quality is crucial for the strength and sealing of steel square tube. It will affect the structural stability and corrosion resistance of square steel tubes.
heat treatment
Appropriate heat treatment can optimize the mechanical properties of square steel pipe, such as improving strength, toughness, and hardness.
Square Rectangular tube packing & Loading
Usually, suitable bundling materials are selected to provide bundling packaging, such as steel strips, steel wires, or plastic bands.For longer steel pipes, bundling points can be appropriately increased to prevent displacement of erw black square rectangular steel tube during transportation.
For the packaging of hot dip galvanized square and rectangular pipe, we can provide various packaging methods such as plastic film packaging, frame fixed packaging, and rust proof paper packaging. Youfa steel pipe can also customize according to customer requirements.
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square and rectangular steel tubes product
Application of Square Rectangular Steel Pipe
Building Atructure——Used for structural framework, providing support and stability. Make balcony railings, stair handrails, etc.
Mechanical Manufacturing——As components in mechanical equipment, such as frames and brackets. Used for manufacturing machine tool beds, workbenches, etc.
Transportation——Used for car frames and chassis components. In railway and rail transit, it is used to manufacture track supports, signal poles, etc.
Furniture Manufacturing——Create the framework for tables and chairs, the skeleton for beds, etc.
Agriculture Field——Create greenhouse frames and support structures for breeding equipment.
Electric Power——As a supporting structure for utility poles, street lamp brackets, and cable trays.
Shelves and Storage——Build columns and beams for shelves to improve the utilization and stability of storage space.
Energy Sector——Solar panel installation bracket
Decoration Engineering——Used to create unique decorative shapes for both internal and external architectural styles, enhancing aesthetics.
Why Choose Youfa Steel Pipe
Tianjin Youfa Steel Pipe Group Co., Ltd. was established on July 1, 2000, Youfa is a large scale steel products manufacturing enterprise. In December 2020, Youfa Group successfully landed on the main board of Shanghai Stock Exchange .We mainly manufacture ERW steel pipe, galvanized steel pipe, hollow section steel pipes, SSAW steel pipe, plastic lining composite pipe, plastic coated steel pipe, stainless steel pipe and pipe fitting, and scaffolding, etc.
We have built a long-term cooperation with many clients, and have received word of praise from customers all over the world.possessing normative QAS, we have acquired certificates of API5L, ISO9001,ISO14000, ISO18000, FPC, BSI and UL/FM quality system.We are committed to meet customer's various after-processing requirements.
Carbon steel pipes meet the following standards: API 5L, ASTM A53/A500,ASTM A795, EN10219/10255, BS1387,BS1139, EN39, ISO65, DIN2440, JIS G3444/3466, etc. and are approved by the Third Party. They are widely used in oil and natural gas, low pressure liquid and mineral powder delivery, and for industrial and civil construction fields and for piles field.
What are square steel tubes called?
Square steel tubes are commonly referred to as "square hollow sections" or "square steel hollow sections" in the industry. They may also be simply called "square steel pipes" or "square tubes" for short.
In some countries, they may be referred to as "square steel hollow sections" or "square box sections". Also known as "square steel hollow pipes" or "square structural tubes" .
How do you measure square or rectangular pipe size?
To measure the size of square or rectangular pipes, two main dimensions need to be considered: outer length and wall thickness.
The outer length is the distance from one outer edge of a square cross-section to the opposite outer edge, which can be measured using a digital caliper or steel ruler. Usually measured in millimeters (mm), centimeters (cm), or inches.
For the outer length, place the measuring tool along one side of the square cross-section, ensuring it is perpendicular to the edge, and measure from one outer edge to another. For rectangular steel pipes, due to the involvement of two different side lengths, it is necessary to measure the length and width of the outer rectangle. Also ensure that measurements are taken perpendicular to the edge.
For wall thickness, the thickness is measured by carefully positioning the jaws of the caliper at the same position on the inner and outer surfaces of the pipe wall, and the difference between the two measurements is the wall thickness. It is important to measure at several locations around the pipeline to consider any changes in thickness.
For example, if the outer length of the square tube is 50 mm and the wall thickness is 3 mm, it is described as a 50 x 50 x 3 mm square tube. The inner length is 50- (2 x 3)=44 mm, and the pipeline can also be described as a square pipeline of 44 x 44 x 3 mm. If the outer length of the rectangular steel pipe is 80 mm, the outer width is 60 mm, and the wall thickness is 4 mm, it is described as an 80 x 60 x 4 mm rectangular steel pipe. The internal length is 80- (2 x 4)=72 mm, and the internal width is 60- (2 x 5)=52 mm.
Ultimate FAQ Guide To Scaffolding Tube
What is square tube metal?
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Square tube metal refers to a type of structural material in the form of a hollow tube with a square cross-section. It is typically made from various metals or alloys, with steel being the most common.Metal square tube offers several advantages. It provides good strength and rigidity due to its shape and material composition. It can be fabricated and welded easily, allowing for the creation of diverse structures and frameworks.The properties and applications of metal square tube depend on the specific metal or alloy used. mor example, steel square tubes are widely used in construction for building frames, fences, and handrails.
What is the advantage of square tube?
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Structural stability: commonly used in building scaffolds and industrial racks.
Space utilization: This is useful in storage systems and enclosures.
Aesthetic appeal: They can add a modern and clean look to designs, both in architecture and in furniture making.
Versatility: Square tubes can be easily cut, welded, and fabricated to meet specific design requirements.
Strength and durability: Made from materials like steel or aluminum, they are often strong and resistant to wear and tear, ensuring a long lifespan.
How strong is galvanized square steel?
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Material composition: High-quality alloys or specific steel grades can offer greater strength.
Dimensions: The size and thickness of the square section affect its strength. Larger and thicker sections can withstand higher loads.
Galvanization process: Common galvanized square steels have yield strengths ranging from around 250 MPa to over 550 MPa, and ultimate tensile strengths from 350 MPa to 800 MPa or more.
Why is galvanized square steel so popular?
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Corrosion resistance: Galvanization provides a protective zinc coating that helps prevent rust and corrosion.
Strength and durability: Square steel offers good structural strength, and when galvanized, it retains this strength while being protected from degradation.
Versatility: It can be easily fabricated and cut to the desired lengths and shapes, allowing for customization in various projects.
Low maintenance: Due to its corrosion resistance, it requires minimal upkeep over time, saving on maintenance costs and effort.
Aesthetic appeal: It has a clean and industrial look that can be aesthetically pleasing in certain designs, both modern and traditional.
What is galvanized steel grade?
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Galvanized steel grades refer to the classification or specification of the steel based on its chemical composition, mechanical properties, and manufacturing process.Common factors cinclude:Carbon content、Alloying elements、Yield strength and tensile strength
Some common galvanized steel grades include:
S235JR: A low-carbon steel grade with moderate strength.
S355JR: Offers higher strength compared to S235JR.
Choose S355JR in heavy construction. For lower requirements, a level like S235JR is sufficient.