Carbon mild steel square tubing Q235 Q235B S275 S275jr A53 st37 square metal tube

Carbon mild steel square tubing is used in most general purpose applications. Low carbon content relatively good mechanical properties along with high quality weldability make it a common choice in fabrication and structural applications. Easily drilled, welded and bolted. Uses include: general machinery where suface imperfections may be tolerated

WELDED PIPE SURFACE TREATMENT

HOT DIP GALVANIZEDZINC COATING: 220g/m2 or customized

BLACK PAINTED (RED, BLUE, GRAY OR OTHER COLORS )

ANTI-RUST OILED（Light oiled or Heavy oiled）

BARE PIPES ONLY （It will cover rust more or less after long time stock）

Production process

Generally, the strip steel is unpacked, flattened, crimped, and welded to form a round tube, then the round tube is rolled into a square tube and then cut to the required length. Usually 50 pieces per pack. Square pipes are divided into seamless and welded seams. Seamless square pipes are formed by extruding seamless round pipes.

The square tube is divided according to the production process:

hot rolled seamless square tube,

cold drawn seamless square tube,

extruded seamless square tube,

welded square tube. Among them, the welded square tube is divided into:

(a) According to the process-arc welding square tube, resistance welding square tube (high frequency, low frequency), gas welding square tube, furnacewelding square tube

(b) According to the weld seam-straight seam welded square tube, spiral welded square tube

Product Advantages
1.High quality raw materials
It is made of high-quality steel, with flat appearance and widely used in curtain wall, building, machinery manufacturing, etc
2.Stable structure and excellent property Excellent acid and alkaline resistance, able to with stand the wind and sun in harsh environment.
3.Accept any shear & sufficientstock
Our factory have hundreds of tons of square tube, which has complete specifications and can be customized according your needs.

Use of carbon steel square tubing

Square tubings have many uses in different industries and fields.

1. You can use it to make brackets and bases for solar panels and solar mounts.

2. For manufacturing various types of construction equipment, such as bulldozers, steam rollers, cranes.

3. Also used as a support structure for bridges, buildings, and towers.

4. Manufacture trucks and trailers, railcar frames and bases.

5. You can easily use it as a railing for stairs, as well as an entrance gate and fence around the courtyard door.

Main Applications:

The purpose of square pipe includes building, machinery manufacturing, steel structure building, shipbuilding, solar power generation support, steel Structural engineering, electric power engineering, power plant, agricultural machinery, glass curtain wall, automobile chassis, airport, boiler construction, highway railing, housing construction, pressure vessels, Storage tank, bridges, power station equipment, lifting and lifting and transportation machinery, and other high load welded structural parts, etc

The steel pipe production line with an annual output of 700,000 tons, has a CNAS certification laboratory, adopts advanced American GBNB and electrical control systems from the German brain. And cooperate with many large steel plate factories to re-inspect raw materials. The zinc coating ranges from 40-220 g/m², the surface is passivated and can be oiled, and the pipe section can be processed into bevels, threads, and grooves. In addition, the company has also introduced a slitting machine to meet the different requirements of customers for products.

Our products are sold to all parts of China and 78 countries and regions widely used in many national key projects such as Beijing Capital International Airport,Shanghai Pudong International Airport and Olympic venues, and exported to Europe, America,Australia, Southeast Asia,the Middle East and other regions.

Packing and delivery

1.Waterproof plastic bag then bundle with strip, On the all.
2.Waterproof plastic bag then bundle with strip, On the end.
3. 20 ft container: not more than 28 mt. and the length is not more than 5.8 m.
4. 40 ft container: not more than 28 mt. and the length is not more than 11.8 m.
5.We currently have a large inventory of steel.