A53 Gr. B 4 Inch Std Galvanized Rectangular Steel Tube

Customization: Available
Type: Seamless
Technique: Hot Rolled

Product Description

Basic Information

Model NO.
A53 Gr. B
Material
Carbon Steel
Surface Treatment
Galvanized / Oiled
Standards
ASTM A53-2007, GB/T 3094-2000, JIS G3466, En10219
Grade
10#-45#, Q195-Q345, St35-St52
Thickness
1.5 - 30 mm
Outer Diameter
20*20mm-300*300mm
Length
2-12 M
Steel Grade
300 Series
Alloy
Non-Alloy
HS Code
7306309000
Capacity
30,000 Metric Tons Per Month

Product Description

Carbon Square Hollow Galvanized Section Pipe is a high-quality structural material designed for durability and strength in various industrial applications.

Product Parameters

Technical Specifications
ShapeSquare: 20*20-200*200mm | Rectangular: 30*20-250*150mm
Thickness1.0-12.0mm
Length3-12m, or custom request
TechniqueHot Rolled, Cold Rolled, ERW, High-frequency welded, Extruded
SurfaceBared, Oil, Galvanized, Paint, etc
MaterialQ195, Q235, Q275, Q345, S355, St33, St37, St52, A500, A513, A106
CertificationISO9001:2000, CE, SGS
UsageMachinery manufacture, Roads and Bridges, Construction, Transportation

Square & Rectangular Size Chart

Size (mm)Wall Thickness (mm) Size (mm)Wall Thickness (mm) Size (mm)Wall Thickness (mm)
20x201.0-3.060x601.8-6.0115x1151.8-8.0
40x401.0-6.0100x1001.8-8.0150x1504.0-10.0
30x201.0-3.0100x501.8-6.0200x1002.5-10.0
50x301.8-4.0120x801.8-10.0250x1504.0-12.0

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Quality Control

Our products undergo rigorous inspections including dimensional checks, surface evaluation, and material testing to ensure compliance with international standards such as ASTM, JIS, and EN. We provide warm-hearted service and reliable quality for every order.

Frequently Asked Questions

1. What is the main advantage of A53 Gr. B galvanized pipes?
A53 Gr. B steel provides excellent tensile strength and weldability. The galvanization process adds a protective zinc coating that prevents rusting and extends the service life in outdoor or corrosive environments.
2. What size ranges do you offer for square sections?
We offer square hollow sections ranging from 20x20mm up to 300x300mm, with wall thicknesses starting from 1.0mm up to 30mm.
3. Can the length be customized?
Yes, while our standard lengths are between 2-12 meters, we can cut the pipes to specific lengths according to customer requirements.
4. What surface treatments are available?
Options include hot-dip galvanized, pre-galvanized, oiled for rust prevention, painted, or bared (black) finishes.
5. Which international standards do your pipes comply with?
Our production follows ASTM A53, GB/T 3094, JIS G3466, and EN10219 standards, and we hold ISO9001, CE, and SGS certifications.
6. What are the common applications for these tubes?
They are widely used in machinery manufacturing, construction (structural frames), bridge engineering, road signage supports, and general transportation infrastructure.

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