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Hot-dip steel square pipe

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Size:15*15-500*500mm / 20*30-400*600mm

Zinc coating:200~280g/m2 or 400~600g/m2

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Product Detail

PRODUCT HIGHLIGHTS

Need square or rectangular tubes with maximum corrosion resistance for outdoor structures? ——Hot-dip galvanized square and rectangular tubes are the ultimate solution. Firststeel supplies hot-dip galvanized square and rectangular tubes with superior quality. Material: Q235, Q345, A36, A500, S235JR etc. Square Tube Size Range: 15×15mm – 500×500mm. Rectangular Tube Size Range: 20×30mm – 400×600mm. Zinc Coating: 220~280g/m2 or 400~600g/m2. Length: 1m~12m or custom cut. Ideal for : outdoor structures, scaffolding, fencing, handrails, structural columns, marine environments, transmission towers, solar mounting systems, agricultural equipment.
Strict QC at every step — thick zinc coating, uniform coverage, sharp corners. ——We implement full-process quality control: incoming raw material inspection with verified chemical composition, in-process monitoring at every production stage, and final inspection for dimensional accuracy, surface quality, and mechanical properties. With professional testing instruments and batch traceability, every shipment is verified before leaving our factory — ensuring consistent quality you can rely on, order after order.
Not sure whether to choose hot-dip galvanized or pre-galvanized tube?—— Our professional technical team provides one-on-one consultation. Tell us your application, environment, and service life requirements — we'll recommend the optimal galvanizing process and specification for your project. Get the right product the first time — no over-spec spending, no under-spec risks.
Worried about delivery delays disrupting your project schedule? Choose Firststeel — we guarantee 100% on-time shipment. With large stock of standard sizes and stable raw material supply, most orders ship 15~20 days. Your project timeline stays on track, every time.
Tired of sourcing galvanized square & rectangular tubes, round pipes, oval tubes, and structural parts from different suppliers? We supply everything you need: hot-dip galvanized square tubes, rectangular tubes, round pipes, pre-galvanized tubes, oval tubes, and custom steel structure parts — all from one factory. One-Stop Steel Sourcing — Save on Consolidation Costs. ✓ Fewer suppliers to manage ✓ Lower shipping & consolidation costs ✓ Single point of contact for all your steel needs

High Strength Prime Astm A36 Metal Hollow Pipe Gi Galvanized square Steel Tube 15x15 100x100 for Construction Project Use

China First Steel Co., Ltd. is a leading professional manufacturer and exporter of a comprehensive range of steel products. With over 20 years of industry experience, we have built long-term stable cooperative relationships with more than 600 clients across 100+ countries and regions worldwide. Adhering to strict quality control standards and professional service concepts, our products have gained widespread recognition and high customer praise for reliable quality, competitive pricing and efficient one-stop solutions. We are committed to delivering premium steel materials and customized services to meet diverse global project and procurement needs.

FAQs

What is your time of making a sample?

Usually we will take 1~3 days to make the sample.

What is your MOQ?

Carbon and Alloy steel, Usually 3 - 5tons for Customized, 1 piece for stocks.

Stainless steel, Usually 1 - 2 tons for Customized, 1 piece for stocks.

What is your delivery time?

For stocks, we can ship goods within 7 days after receiving your deposit

For customize, it usually needs around 15days- 30 days after receiving the deposit

What is your shipping port?

Tianjin port, Qingdao port, Shanghai Port.

What is your payment terms?

Usually 30% deposit by TT in advance and balance against copy of BL.

What is your company locations?

Shandong province.

What is your main/advantaged products?

1. Carbon&Stainless steel strip, packing steel strap, spring steel strip etc.

2. Carbon&Stainless steel flat bar, round bar, square bar, Hexagon bar, half round bar.

3. Section Steel: C channel, U channels, I beam, H beam, angles etc.

4. Carbon&Stainless Steel pipes, welded rectangular tube, pipes. Seamless pipe.

5. Hot rolled steel coils, plates, CR coils, sheets.

6. Galvanized steel coils, sheet, PPGI,corrugated sheets.

What is your Main exporting countries?

Australia, New Zealand, Middle&South America, Southeast Asia, Middle east, Africa countries are our main market.

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Product Detail

PRODUCT HIGHLIGHTS

Need square or rectangular tubes with maximum corrosion resistance for outdoor structures? ——Hot-dip galvanized square and rectangular tubes are the ultimate solution. Firststeel supplies hot-dip galvanized square and rectangular tubes with superior quality. Material: Q235, Q345, A36, A500, S235JR etc. Square Tube Size Range: 15×15mm – 500×500mm. Rectangular Tube Size Range: 20×30mm – 400×600mm. Zinc Coating: 220~280g/m2 or 400~600g/m2. Length: 1m~12m or custom cut. Ideal for : outdoor structures, scaffolding, fencing, handrails, structural columns, marine environments, transmission towers, solar mounting systems, agricultural equipment.
Strict QC at every step — thick zinc coating, uniform coverage, sharp corners. ——We implement full-process quality control: incoming raw material inspection with verified chemical composition, in-process monitoring at every production stage, and final inspection for dimensional accuracy, surface quality, and mechanical properties. With professional testing instruments and batch traceability, every shipment is verified before leaving our factory — ensuring consistent quality you can rely on, order after order.
Not sure whether to choose hot-dip galvanized or pre-galvanized tube?—— Our professional technical team provides one-on-one consultation. Tell us your application, environment, and service life requirements — we'll recommend the optimal galvanizing process and specification for your project. Get the right product the first time — no over-spec spending, no under-spec risks.
Worried about delivery delays disrupting your project schedule? Choose Firststeel — we guarantee 100% on-time shipment. With large stock of standard sizes and stable raw material supply, most orders ship 15~20 days. Your project timeline stays on track, every time.
Tired of sourcing galvanized square & rectangular tubes, round pipes, oval tubes, and structural parts from different suppliers? We supply everything you need: hot-dip galvanized square tubes, rectangular tubes, round pipes, pre-galvanized tubes, oval tubes, and custom steel structure parts — all from one factory. One-Stop Steel Sourcing — Save on Consolidation Costs. ✓ Fewer suppliers to manage ✓ Lower shipping & consolidation costs ✓ Single point of contact for all your steel needs

FAQs

What is your time of making a sample?

Usually we will take 1~3 days to make the sample.

What is your MOQ?

Carbon and Alloy steel, Usually 3 - 5tons for Customized, 1 piece for stocks.

Stainless steel, Usually 1 - 2 tons for Customized, 1 piece for stocks.

What is your delivery time?

For stocks, we can ship goods within 7 days after receiving your deposit

For customize, it usually needs around 15days- 30 days after receiving the deposit

What is your shipping port?

Tianjin port, Qingdao port, Shanghai Port.

What is your payment terms?

Usually 30% deposit by TT in advance and balance against copy of BL.

What is your company locations?

Shandong province.

What is your main/advantaged products?

1. Carbon&Stainless steel strip, packing steel strap, spring steel strip etc.

2. Carbon&Stainless steel flat bar, round bar, square bar, Hexagon bar, half round bar.

3. Section Steel: C channel, U channels, I beam, H beam, angles etc.

4. Carbon&Stainless Steel pipes, welded rectangular tube, pipes. Seamless pipe.

5. Hot rolled steel coils, plates, CR coils, sheets.

6. Galvanized steel coils, sheet, PPGI,corrugated sheets.

What is your Main exporting countries?

Australia, New Zealand, Middle&South America, Southeast Asia, Middle east, Africa countries are our main market.

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Hot-dip steel square pipe

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