- Overview
- Detailed Photos
- Product Parameters
- Normal Size
- Application And Usage
- Packaging & Shipping
- Company Profile
- Sales Market
- FAQ
Basic Info.
Product Description
| Name | Black Square Tube Ms Carbon 2x4 Rectangular Steel Tubing Price |
| Specification | 20mmx20mm - 800mmx800mm 20mmx30mm - 400mmx800mm |
| Wall Thickness | 1.0mm - 30mm |
| Length | 1m - 16m or Customerized |
| Steel material | Q195 → SS330,ST37,ST42 Q235 → SS400,S235JR Q345 → S355JR,SS500,ST52 |
| Surface Treatment | 1) Bared 2) Black Painted (varnish coating) 3) Galvanized 4) Oiled 5) PE,3PE, FBE, corrosion resistant coating, Anti corrosion coating |
| Normal Size of Square Tubes | |||||||
| Specification (mm) | Thickness (mm) | Specification (mm) | Thickness (mm) | Specification (mm) | Thickness (mm) | Specification (mm) | Thickness (mm) |
| 15*15 | 0.6-2.2 | 16*16 | 0.6-2.0 | 18*18 | 0.6-2.0 | 20*20 | 0.6-2.0 |
| 25*25 | 0.6-3.0 | 30*30 | 0.8-3.0 | 34*34 | 1.0-3.5 | 38*38 | 1.0-3.5 |
| 40*40 | 1.0-3.5 | 48*48 | 1.2-3.5 | 50*50 | 1.2-4.0 | 60*60 | 1.2-4.0 |
| 70*70 | 1.2-4.0 | 75*75 | 1.2-4.0 | 80*80 | 1.2-5.0 | 90*90 | 1.2-5.0 |
| 100*100 | 1.2-6.0 | 110*110 | 1.2-6.0 | 120*120 | 2.0-6.0 | 125*125 | 2.0-6.0 |
| 130*130 | 2.0-6.0 | 140*140 | 3.0-6.0 | 150*150 | 3.75-8.0 | 160*160 | 3.75-8.0 |
| 175*175 | 4.0-8.0 | 180*180 | 4.0-8.0 | 200*200 | 4.0-12 | 250*250 | 4.0-12 |
| 280*280 | 4.0-12 | 300*300 | 4.0-12 | 350*350 | 4.0-12 | 400*400 | 4.0-12 |
| Normal Size of Rectangular Tubes | |||||||
| Specification (mm) | Thickness (mm) | Specification (mm) | Thickness (mm) | Specification (mm) | Thickness (mm) | Specification (mm) | Thickness (mm) |
| 10*20 | 0.6-2.0 | 14*20 | 0.6-2.0 | 15*25 | 0.6-2.0 | 20*30 | 0.6-2.0 |
| 20*40 | 0.6-3.0 | 20*50 | 0.6-3.0 | 25*40 | 0.8-3.0 | 25*50 | 0.8-3.0 |
| 30*40 | 0.8-3.5 | 30*50 | 0.8-3.5 | 30*60 | 0.8-3.5 | 30*70 | 0.8-4.0 |
| 40*60 | 0.8-4.0 | 40*70 | 1.0-4.0 | 40*80 | 1.0-4.0 | 40*90 | 1.0-4.0 |
| 40*100 | 1.2-4.0 | 40*120 | 1.2-5.0 | 50*70 | 1. 2-4.0 | 50*80 | 1.2-4.0 |
| 50*90 | 1.2-4.0 | 50*100 | 1.2-4.0 | 50*120 | 1.2-5.0 | 50*150 | 1.2-6.0 |
| 60*80 | 1. 2-5.0 | 60*90 | 1.2-5.0 | 60*100 | 1.2-5.0 | 60*120 | 1.2-5.0 |
| 60*180 | 2.0-6.0 | 60*200 | 2.0-6.0 | 70*140 | 2.0-6.0 | 70*190 | 2.0-6.0 |
| 80*100 | 2.0-6.0 | 80*120 | 2.0-6.0 | 80*160 | 2.0-6.0 | 80*180 | 3.0-6.0 |
| 80*200 | 3.0-6.0 | 85*175 | 3.0-6.0 | 90*190 | 3.0-6.0 | 100*120 | 2.0-6.0 |
| 100*125 | 2.0-6.0 | 100*140 | 2.0-6.0 | 100*150 | 2.0-6.0 | 100*160 | 2.0-6.0 |
| 100*180 | 3.0-6.0 | 100*200 | 3.75-8.0 | 110*140 | 4.0-6.0 | 120*130 | 4.0-6.0 |
| 120*140 | 4.0-6.0 | 120*200 | 4.0-8.0 | 125*135 | 4.0-8.0 | 150*200 | 4.0-12 |
| 150*250 | 4.0-12 | 150*300 | 4.0-12 | 150*350 | 4.0-12 | 206*300 | 4.0-12 |
Black steel square pipes are often used for glass curtain walls, power towers, communication grids, water and gas transmission, wire sleeves, houses, bridges, metal structures, power transmission, and other aspects due to their excellent performance.
is a comprehensive enterprise group integrating sales and after-sales service of steel products, design and maintenance of intelligent pipe network, and domestic and international trade.
Our mission
Provide a standardized trade platform based on strict quality control, technological innovation and professional services, to be a brand enterprise in the field of international trade of metal materials and add luster to China's manufacturing.
[Our factory] 
[Hot rolled product production line] 
[Cold rolled coil production equipment] 
[Cold-rolled seamless steel pipe production equipment]
[Steel custom cutting equipment] 
[Customer visits the company's factory/business manager provides on-site guidance to the customer's company] 
Q: How to contact us?
A: If you are interested in our products, please feel free to contact us at any time. You can inquire with our overseas department manager through TradeMessenger. Or call us at+86 18810048889
Q: What are your main products?
A: Our main products are galvanized steel coils and various types of steel pipes. In addition, we also have carbon steel coils, stainless steel coils, corrugated plates, angle steel, H (I) steel, channel steel, bars, and pipe fittings.
Q: Do you provide customized product services?
A: Of course, we can design and produce the products you need based on your specifications and drawings. For example: special dimensions, special controls, OEM, etc.
Q: How long can I get the price?
A: Please provide the product specifications, such as material, size, quantity, and other requirements. We usually quote within 6 hours, and the steel price fluctuates daily with the market. Our prices are very competitive because we are a factory. If you are very eager to obtain a price, please call us or let us know in an email so that we can prioritize your inquiry.
Q: Are you a manufacturer?
A: Yes, we are manufacturers, not agents. We are a manufacturer with 17 years of experience in producing steel pipes and galvanized sheet coils. We have our own factory located in Shandong, China. You can get the true factory price and quality from us. Welcome to contact us!
Q: Can we visit your factory?
A: Of course, we welcome you to visit our factory on-site or visit our production line through online videos to learn more about our strength and quality. Once we have your schedule, we will arrange a professional sales team to follow up with you.
Q: What are the equipment in your factory?
A: Our factory has advanced processing and testing equipment such as hot-rolled product production lines, cold-rolled seamless steel pipe production equipment, cold-rolled coil production equipment, customized steel cutting equipment, ultrasonic testing systems, element analyzers, coating thickness gauges, etc., making our products of higher quality and production efficiency.
Q: How do you ensure the quality of the product?
A: All products must undergo three inspections throughout the entire manufacturing process, including production, cutting, and packaging. The factory inspection report is provided with the goods. If necessary, third-party inspections such as SGS can be accepted.
Q: How can I trust you?
A: We believe that honesty is the life of our company. We welcome you to visit our factory in Shandong, China, and inspect our company, factory, and products through video, live streaming, and other means. In addition, there is a trade guarantee from Chinese manufacturing, and your order and funds will be well guaranteed.
Q: How can I get the sample? What is the cost?
A: We provide free samples, and you only need to send us inquiries or contact us via email or phone. After discussion, we will prepare samples for you. Welcome to contact us for free samples!
Q: What is your delivery time?
A: Different products and procurement quantities have different delivery times. The product will be delivered as soon as possible on the basis of quality assurance. Usually, if the goods are in stock, it takes 7-14 days. Alternatively, if the goods are out of stock, it will take 25 to 45 days.
Q: What is the transaction process for your inventory products?
A: We have various types and sizes of products for you to choose from. After communication, after selecting the product:
1. We will plan the most suitable transportation method for you and calculate the cost, and immediately issue a formal invoice to you.
2. Check the quality again and ship within 1-2 working days after payment.
3. Send you a tracking number via email and help track the package until it reaches you.
Q: Can you arrange shipment?
A: Of course, we have freight forwarders who have been cooperating for many years. We are VIP and can provide you with the most favorable prices and professional services.
Q: What is the loading port?
A: Under normal circumstances, we ship from ports in Tianjin, Qingdao, and Shanghai. You can choose other ports as needed.
Q: How to package the product?
A: According to the characteristics and transportation method of the product, fixing it in the most suitable and stable way can ensure problems such as bumps, corrosion, scratches, etc. during transportation.
Q: What if I don't have import experience?
A: We have rich export experience. As long as you have an import license, please leave the rest to us! We will help you choose the most suitable transportation service to safely and accurately deliver the product to the place where it is needed.