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carbon steel square tube

length: 1m-12m

Thickness: 0.5 – 30mm

Design Style: Customizable

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Product Details

WHY choose us

Product Introduce

Carbon steel square tubes are hollow, seamless, long strips of steel, formed through hot rolling, cold drawing, and extrusion. They are typically square or rectangular in cross-section and are available for structural, fluid transport, and boiler applications. They operate in temperatures ranging from -40°C to 450°C.

Product Parameters

Item	Parameters
Products name	Carbon steel square tube
Thickness	0.25-30 mm
Side Length	20×20 ~ 600×600 (mm)
Length	4~12m, customer requirements
MOQ	10 tons
Delivery time	15-30 days for conventional products, negotiated for customized products
Payment Term	T/T,100% L/C at sight
Packing	Standard freight packaging

Common grades and properties

Grade	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)	Application
Q235B	≥235	370~500	≥26	Building supports, guardrails
Q355B	≥355	470~630	≥22	Factory trusses, construction machinery
Q420C	≥420	520~680	≥19	Bridge structures, heavy-duty racking

Common application scenarios

1.Building and Steel Structures

Factory Columns, Curtain Wall Frames, Fire Stair Frames

2.Logistics and Warehousing

Heavy-Duty Shelf Beams, Automated Warehouse Brackets

3.Infrastructure and Energy

Photovoltaic Brackets, Agricultural Greenhouses, Bridge Guardrail Bases

Our Certificates

ISO 45001

ISO 14001

ISO 9001

SGS Shandong Wanzhi

SGS Zhengzhou Wanzhi

Customer visit

Customers visit and sign contracts on site

Customer Praise

Why choose us ?

Wanzhi Steel Co., Ltd. Suppliers offer:

Customized solutions: customized profiles (wavy, tile) and sequined finishes (regular, no sequins).
Timely delivery: fast delivery, as fast as within a week.
Competitive pricing: bulk discounts available for orders over 10 tons.
Professional logistics support: ocean-safe packaging with moisture barrier and steel strapping to prevent damage.