Carbon steel rectangular tubing

Carbon steel rectangular tubing, also widely named Rectangular Hollow Section (RHS), is cold-formed structural hollow steel manufactured mainly by ERW electric resistance welding process. It is available under international standards including ASTM A500 Grade A/B/C/D and EN10219, widely adopted for structural engineering and metal fabrication projects.This rectangular hollow tube features flat outer surfaces, sharp and clean corners, uniform wall thickness and tight dimensional tolerances. It delivers outstanding strength-to-weight ratio, good bending performance, reliable weldability and formability. Compared with solid steel profiles, RHS greatly reduces dead load while maintaining high load-bearing and anti-bending capacity, making it a cost-effective structural material.

Carbon steel rectangular tubing is extensively used for building structural frames, workshop steel structures, curtain wall supports, machinery & equipment frames, trailer and truck chassis, fence posts, railings, brackets, agricultural frames and general metal fabrication.

For export shipment, seaworthy packing is adopted: bundled with steel strips, wrapped by waterproof protective film, palletized and secured inside containers with steel cables to avoid shifting and damage during ocean transportation.

Key Features

Rectangular hollow section (RHS), cold formed ERW welded carbon steel
High strength-to-weight ratio, excellent bending resistance
Smooth flat surface, precise dimension & uniform wall thickness
Great weldability, cuttable and easy for machining & fabrication
Multiple sizes, wall thickness and custom cut lengths available
Optional black / oiled / hot-dip galvanized surface treatment
ASTM A500 Gr.B / EN10219 standard available
Cost-effective for structural construction

Carbon Steel Rectangular Tubing Specifications

Item	Available Range
Product	Carbon Steel Rectangular Tubing / Rectangular Hollow Section(RHS)
Standard	ASTM A500 Gr.A/B/C/D, EN10219, Q235B, Q355B
Manufacturing Process	Cold formed, ERW Electric Resistance Welded
Size Range	Width:20–300mm, Height:10–200mm, Wall Thickness:1.2–16mm
Length	Standard 6m / 12m, Custom cut-to-length available
Surface Finish	Black bare, Anti-rust oil, Hot-dip galvanized(HDG)
Certificate	Mill Test Certificate(MTC) available
Package	Steel strip bundling, waterproof film wrapped, seaworthy export packing
Application	Building steel structure, machinery frame, trailer chassis, fence, metal fabrication

Application

Building & workshop steel structures
Curtain wall keels and supporting brackets
Machinery and equipment frames
Truck, trailer and transport chassis
Fencing, handrails and guardrails
Agricultural and greenhouse frames
General metal fabrication & engineering projects

Frequently Asked Questions About Carbon steel rectangular tubing

1. How can we trust your company?

We specialize in steel business for many years, you are welcome to investigate in any way,anyway, you can place an order on Alibaba, with trade assurance, which can ensure your payment.

2. How do you guarantee the quality?

①We have passed ISO9001, SGS, CE and other certifications;

②Always have pre-production samples before mass production,and always do final inspection before shipment;

③Acceptable third-party inspection.

3. About the product price?

Due to the cyclical changes in raw material prices, prices vary from period to period. You can consult us, you can communicate with us online through the platform, We Chat, WhatsApp and other platforms, and we will reply within 24 hours. Please give us your requirements and specifications (steel grade, size, quantity, destination port), and we will work out the best price at the first time.

4. Can I visit your factory?

Of course, we welcome customers from all over the world to visit our factory. However, some factories are not open to the public.

5. Can you send samples?

Of course, we can send samples to all over the world, our samples are free,but customers need to bear the express cost.

6. How long is your delivery time?

Generally speaking, our delivery time is within 7-10 days, if the demand is particularly large or there are special circumstances, the delivery time may be delayed.