rectangular steel tubing for Hot Rolled Carbon Steel Hollow

Special models can be customized

rectangular tube from 3/8" x 1-1/2" up to 10" x 24".
square tube from 3/8" x 3/8" up to 24" x 24".

Min.Order Quantity: 1 Ton

Supply Ability: 4800 Tons / Month

Port: Tianjin port

Certification: SGS、BV、API、CCIC,CE、ISO

Delivery Detail: 10-20 days

Payment Terms: FOB, T/T, L/C,Deferred Payment L/C

Our company accept payment after material  at your warehouse.


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Hot Roll Steel Rectangular Tube

rectangular steel tubing welded structural grade tubing that is available in either type ASTM A500  or A513 Grade B is cold formed,

electric-resistance welded tubing. It has a high strength-to-weight ratio, is relatively low in cost and is easily welded.Rectangular

Tube The hollow shape offers good appearance and ease of maintenance.

rectangular steel tubing Applications

Structural Steel tube (tubing) can be used for a wide variety of mechanical applications. I’s close tolerances, good finish,

and dense structure make it ideal for parts such as structural support and parts, frames, racks, trailer beds and trailer components,

structural components and supports for buildings, bridges, and highways, conveyors, machine parts, guides, and supports,

safety and deck rails, sign posts, athletic equipment, ornamental usages and a wide range of applications in industrial, construction,

automotive, appliance, furniture and agricultural industries.



Largest Outside Dimension Across Flats Tolerance (+/-) inches*
2-1/2 and under 0.020
Over 2-1/2 to 3-1/2 incl 0.025
Over 3-1/2 to 5-1/2 incl 0.030
Over 5-1/2 1%

* Tolerances include allowance for convexity or concavity. Tolerance may be increased 50% when applied

to the smaller dimension of rectangular sections whose ratio if the cross-sectional dimensions is between 1.5 and 3,

and 100 percent when the ratio exceeds 3.

The tolerance for wall thickness exclusive of weld area shall be plus or minus 10% of the nominal wall thickness specified.

The wall thickness is to be measured at the center of the flat.

The permissible variation for straightness shall be 1/8" times the number of feet of the total length divided by 5.

Adjacent sides may deviate from 90° by a tolerance of plus or minus 2° maximum.

The radius of the outside corner of the section shall not exceed three times the specified wall athickness.

Twist is measured by holding down one end of square or rectangular tube on a flat surface plate with the bottom side of

the tube parallel to the surface plate and noting the height that either corner, at the opposite end of the bottom side of the tube,

extends above the surface plate.

Specified Dimension of Longest Side Maximum Twist (inches) in 3 feet
1-1/2 and Under 0.050"
Over 1-1/2 to 2-1/2 incl 0.062"
Over 2-1/2 to 4 incl 0.075"
Over 4 to 6 incl 0.087"
Over 6 to 8 incl 0.100"
Over 8 0.112"


Global Business

1. More than 10 years of sales experience

2. Product exported more than 150 countries

3. Arrange to produce according yo customer's request

Fast Delivery

1. AA level customs broker,Faster through

2. 20 years of experience in the freight forwarding company

3. Delivery Detail: 10-20 days

Trusted Quality

1. Certificate: API, CE, ISO9001.2000.MTC etc

2. Inspection: BV,SGS,others is avaliable.

3. A complete testing system and testing equipments

One-Step Service

1. Free sample can be provided

2. Small order is acceptable

3. OEM is acceptable

4. Any third party testing is acceptable




  • Phone0086-317-2159105


  • Phone0086-317-2159106