Galvanized Square Steel Tube


Standards: ASTM A106, ASTM A53 Grade A/B

Shape: Square and Rectangular

Size: DN15-200

Zinc Coating: 300-500g/m2, (42um-70um)

Applications: Construction foundation piles, steel structures or outdoors such as scaffolding and fence posts.

WIHO METALS is a specialist manufacturer and supplier of hot-dip galvanized steel tube or pipe, we supply and stock a large inventory of welded square galvanized steel tubes in accordance with ASTM A106 and A53 Grade A, and Grade B intended for mechanical and pressure applications. Galvanized square tube(GI square tube) is a great choice for structural applications and and for many other applications. One of the biggest advantages of using square tubing is its flat surface, which allows for the attachment of objects. Because square tubing is flat, it can be fabricated to be closer to nearby objects. Galvanized square steel tube is easy to machine, weld, and form, and it offers corrosion protection at a lower cost. While it’s not as flexible as stainless steel, it is easy to machine and weld and has comparable strength. Because of this, it is used in construction applications such as fencing, railings, and more.

Why Choose Galvanized Square Tubing?

Compared to round galvanized tubing, square tubing doesn’t require as much specialized measuring as its round counterpart, making it an ideal choice for many projects. The process of galvanizing square tube steel consists of applying a zinc coating to prevent rusting. This zinc layer forms a special metallurgical structure and can withstand higher pressure and mechanical damage, is an excellent choice for use in outdoor and exposed environments such as construction sites. For a variety of applications, round or square tubing is a better choice. While round tubing the works well for most projects, square tube is more appropriate for projects involving tight spaces or sharp turns.

Size of Galvanized Square Steel Pipe

Size, mm W.T,mm Size, mm W.T,mm Size, mm W.T,mm Size, mm W.T,mm
15*15 0.6-2.0 16*16 0.6-2.0 18*18 0.6-2.0 20*20 0.6-2.0
25*25 0.6-3.0 30*30 0.8-3.0 34*34 1.0-3.5 38*38 1.0-3.5
40*40 1.0—3.5 48*48 1.2-3.5 50*50 1.2-4.0 60*60 1.2-4.0
70*70 1.2-4.0 75*75 1.2-4.0 80*80 1.2-5.0 90*90 1.2-5.0
100*100 1.2-6.0 110*110 1.2-6.0 120*120 2.0-6.0 125*125 2.0-6.0
130*130 2.0-6.0 140*140 3.0-6.0 150*150 3.75-8.0 160*160 3.75-8.0
175*175 4.0-8.0 180*180 4.0-8.0 200*200 4.0-12 250*250 4.0-12
280*280 4.0-12 300*300 4.0-12 350*350 4.0-12 400*400 4.0-12


We also are a professional supplier of black and hot-dipped, zinc-coated steel square tubing that is extremely durable and strong, with excellent thermal transmission properties, and can be used in structural applications. The steel tubes provided by us are from china’s leading steel mills and we also offer steel additional services like cutting, welding, bending, machining, pre-coating and beveling. For more information on our extensive steel alloys inventory, please contact us or fill in the form below.

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