Factory Wholesale Hot-Rolled/Cold-Drawn Square Hollow Section Galvanized Steel Pipe Q235/API 5L/ASTM A105

• Customization: Available
• After-sales Service: 24h Online
• Type: Seamless/Welded
• Model NO.: ASTM: A105, A106, A106B, A106C, A178, A179, A192,
• Technique: Hot/Cold Rolled,Cold Draw,ERW,Saw,Efw,Extrude
• Material: Carbon,Stainless,Alloy
• Surface Treatment: Black/Varnishing/Polished/Oiled/Galvanized
• Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
• Section Shape: Rectangular
• Payment: T/T,L/C,etc.
• Certificate: CCS, ABS, BV API, ISO9001
• Thickness: Customizable
• Length: Customizable
• Width: Customizable
• Delivery: at Stock or 7-15 Days According to The Quantity
• MOQ: Low MOQ
• Quality Control: 100% Inspection
• Secondary or Not: Non-Secondary
• Sample: Provide
• Standard and Grade-01: ASTM: A105, A106, A106b, A106c,
• Standard and Grade-02: SAE1018, SAE1020, SAE1045,etc
• Standard and Grade-03: 16mn, 50mn, Q195, Q215, Q235
• Technique-01: Hot Rolled, Cold Drawn, Forging, Seamless, Welded
• Transport Package: Neutral Standard Export Seaworthy Packing
• Specification: As requirement
• Trademark: Tongno
• Origin: Wuxi China
• Production Capacity: 200, 000 Ton/Year

Product Description

Product Description

Profiled Pipe The profiled pipe is an exquisitely crafted seamless steel conduit, meticulously produced from a variety of profiles through the sophisticated cold drawing technique. These profile tubes are adeptly classified based on cross-sectional design and material composition. They encompass a range of profiles including seamless steel pipe profile tubes, aluminum alloy profile tubes, and innovative plastic profile tubes.

Rectangular/Square Tube Characterized by its hollow, square cross-section, this lightweight, thin-walled steel marvel-known as a steel cooling bending profile-is crafted using Q235 hot-rolled or cold-rolled steel strip or coil. Through an intricate process of cold bending followed by high-frequency welding, it achieves a robust square cross-sectional configuration. Notably, the hot-rolled extra thick-walled square tube excels with superior corner dimensions and edge precision, often surpassing the standards of resistance-welded cold-formed square tubes.
Classification of Rectangular/Square Tube:
The classification encompasses both seamless and welded steel pipes (seamed pipes), including hot-rolled seamless square tubes, cold-drawn seamless square tubes, extruded seamless square tubes, and welded square tubes.
The welded square tube category is further divided into:
1. Process-based Classification - This includes the electric arc welding square tube, resistance welding square tube (available in both high frequency and low frequency), gas welding square tube, and the traditional furnace welding square tube.
2. Seam-based Classification - This involves the straight seam welded square tube and the spiral welded square tube, each serving distinct industrial applications.

Product Name	Profiled Tubes
Standard	ASTM: A105, A106, A106B, A106C, A178, A179, A192, A210, A519, A53, A53A, A53B,API5L,etc
	ASME: B36.19, B36.10,etc
	SAE1018, SAE1020, SAE1045,etc
	JIS: S20C, S25C, S35C, S45C, S55C,etc
	DIN: C35, CK35, C45, CK45, etc
	GB/T: 10#, 20#, 35#, 45#, 55#, etc
Material	16Mn, 50Mn, 20Cr, 40Cr, 15CrMo, 20CrMo, 30CrMo, 35CrMo, 42CrMo, SS400,etc
	C35/CK35, C45/CK45, etc
	SAE1018, SAE1020, SAE1045,etc
	St37, St52, etc
	Q195, Q215, Q235, Q275,Q295,Q345,Q355,Q390,etc
	S235(JR,J0,J2),S275(JR,J0,J2),S355(JR,J0,J2),S420(N,ML),S460(M,ML)
Square Pipe Size	16×16×0.4~1.5 ; 18×18×0.4~1.5 ; 20×20×0.4~1.5 ; 25×25×0.6~2.0 ; 30×30×0.6~4.0 ; 34×34×1.0~2.0 ; 35×35×1.0~4.0 ; 38×38×1.0~4.0 ; 40×40×1.0~4.5 ; 44×44×1.0~4.5 ; 45×45×1.0~5.0 ; 50×50×1.0~5.0 ; 60×60×1.5~5.0 ; 70×70×2.0~6.0 ; 75×75×2.0~6.0 ; 80×80×2.0~6.0 ; 85×85×2.0~6.0 ; 95×95×2.0~8.0 ; 100×100×2.0~8.0 ; 120×120×4.0~8.0 ; 150×150×6.0~10.0 ; 180×180×6.0~12.0 ; 200×200×6.0~30.0 ; 220×220×6.0~30.0 ; 250×250×6.0~30.0 ; 280×280×6.0~30.0 ; 300×300×8.0~30.0 ; 320×320×8.0~30.0 ; 350×350×8.0~30.0 ; 380×380×8.0~30.0 ; 400×400×8.0~30.0 ; 420×420×10.0~30.0 ; 450×450×10.0~30.0 ; 480×480×10.0~30.0 ; 500×500×10.0~30.0
Rectangular Tube Size	10×20×0.6~1.5 ; 14×21×0.6~1.5 ; 15×30×1.5~1.5 ; 15×38×0.6~1.5 ; 20×30×0.6~2.0 ; 20×40×0.8~2.0 ; 20×50×1.0~2.0 ; 22×35×0.9~2.0 ; 25×40×0.9~3.75 ; 25×65×1.0~2.0 ; 30×40×1.0~3.75 ; 30×45×1.0~3.75 ; 30×50×1.0~4.0 ; 30×60×1.0~4.5 ; 40×50×1.0~4.5 ; 40×60×1.0~5.0 ; 40×80×1.5~5.0 ; 40×100×2.0~5.0 ; 50×60×2.0~5.0 ; 50×80×2.0~5.0 ; 50×100×2.0~8.0 ; 60×80×2.0~6.0 ; 80×100×2.0~8.0 ; 120×60×2.5~10.0 ; 120×80×2.5~10.0 ; 150×100×2.5~12.0 ; 180×150×2.5~12.0 ; 200×100×4~12.0 ; 200×150×4~12.0 ; 250×150×6~12.0 ; 250×100×6~12.0 ; 250×200×6~30.0 ; 300×150×6~30.0 ; 300×200×6~30.0 ; 300×250×6~30.0 ; 400×250×8~30.0 ; 400×300×8~30.0 ; 450×200×8~30.0 ; 450×250×8~30.0 ; 400×300×8~30.0 ; 400×350×8~30.0 ; 500×200×10~30.0 ; 500×250×10~30.0 ; 500×300×10~30.0 ; 500×350×10~30.0 ; 500×400×10~30.0 ; 500×450×10~30.0
Technique	Hot Rolled, Cold Drawn, Forging, Seamless or Welded
Pipe Ends	1) Plain  2) Beveled  3) Threaded with coupling and plastic cap
Deep Processing	Oiled, Painted, Galvanized, Powder Coating, Shrink Head, Pressure Groove, Welding Head, Punching, Threaded With Coupling and Plastic Cap
Package	Standard sea-worthy package or as required

Chemical Composition:

Grade		Chemical Composition
		C Max	Mn	SI Max	P Max	S Max	V	Nb	Ti	Al Min	Cr Max	Ni Max
Q295	A	0.16	0.80-0.15	0.55	0.045	0.045	0.02-0.15	0.015-0.060	0.02-0.20	-
	B	0.16	0.80-0.15	0.55	0.04	0.04	0.02-0.15	0.015-0.060	0.02-0.20	-
Q345	A	0.2	1.00-1.6o	0.55	0.045	0.045	0.02-0.15	0.015-0.060	0.02-0.20	-
	B	0.2	1.00-1.60	0.55	0.04	0.04	0.02-0.15	0.015-0.060	0.02-0.20	-
	c	0.2	1.00-1.60	0.55	0.035	0.035	0.02-0.15	0.015-0.060	0.02-0.20	0.015
	D	0.18	1.00-1.60	0.55	0.03	0.03	0.02-0.15	0.015-0.060	0.02-0.20	0.015
	E	0.18	1.00-1.60	0.55	0.025	0.025	0.02-0.15	0.015-0.060	0.02-0.20	0.015
Q390	A	0.2	1.00-1.60	0.55	0.045	0.045	0.02-0.20	0.015-0.060	0.02-0.20	-	0.3	0.7
	B	0.2	1.00-1.60	0.55	0.04	0.04	0.02-0.20	0.015-0.060	0.02-0.20	-	0.3	0.7
	c	0.2	1.00-1.60	0.55	0.035	0.035	0.02-0.20	0.015-0.060	0.02-0.20	0.015	0.3	0.7
	D	0.2	1.00-1.60	0.55	0.03	0.03	0.02-0.20	0.015-0.060	0.02-0.20	0.015	0.3	0.7
	E	0.2	1.00-1.60	0.55	0.025	0.025	0.02-0.20	0.015-0.060	0.02-0.20	0.015	0.3	0.7
Q420	A	0.2	1.00-1.70	0.55	0.045	0.045	0.02-0.20	0.015-0.060	0.02-0.20	-	0.4	0.7
	B	0.2	1.00-1.70	0.55	0.04	0.04	0.o2-0.20	0.015-0.060	0.02-0.20	-	0.4	0.7
	c	0.2	1.00-1.70	0.55	0.035	0.035	0.02-0.20	0.015-0.060	0.02-0.20	0.015	0.4	0.7
	D	0.2	1.00-1.70	0.55	0.03	0.03	0.02-0.20	0.015-0.060	0.02-0.20	0.015	0.4	0.7
	E	0.2	1.00-1.70	0.55	0.025	0.025	0.02-0.20	0.015-0.060	0.02-0.20	0.015	0.4	0.7
Q460	A	0.2	1.00-1.70	0.55	0.035	0.035	0.02-0.20	0.015-0.060	0.02-0.20	0.015	0.7	0.7
	B	0.2	1.00-1.70	0.55	0.03	0.03	0.02-0.20	0.015-0.060	0.02-0.20	0.015	0.7	0.7
	C	0.2	1.00-1.70	0.55	0.025	0.025	0.02-0.20	0.015-0.060	0.02-0.20	0.015	0.7	0.7

Detailed Photos

 

Certifications

Packaging & Shipping

1.Each Customizable Thickness Rectangle Hollow Section is carefully encased in an export sea worthy package, complemented by an additional layer of water-proof paper to ensure impeccable condition upon delivery.
2. Safe loading and fixing is guaranteed by our professional teams, who meticulously handle every step of the process to ensure your product arrives intact and flawless.

Delivery Detail: Expect your order to be dispatched within 7-10 working days after we receive your deposit, or we can adjust based on the specifics of your order quantity to meet your unique needs.

Company Profile

Wuxi Tongno Special Steel Co., Ltd. Established in 2013 with a registered capital of 5 million yuan, WUXI TONGNO SPECIAL STEEL CO., LTD is a dynamic enterprise specializing in the professional production of seamless steel pipes. With remarkable advancements over the years, the company now boasts three sophisticated seamless steel pipe production lines.

WUXI TONGNO SPECIAL STEEL CO., LTD is steadfast in its commitment to the philosophy of 'quality first, customer first.' This dedication ensures that our products are of the utmost precision, available in a wide range of wall thicknesses, and cater to small quantities across diverse varieties. Our production is characterized by its rapid pace and adherence to domestic advanced standards, particularly excelling in the manufacturing of small-diameter, medium-thick-walled, and large-caliber thin-walled alloy seamless steel pipes. Our products are renowned both domestically and internationally, powering various construction projects and showcasing our manufacturing prowess.

Our Advantages

1. Exceptional Customer Service: We promise to address all your inquiries with unparalleled efficiency, offering responses within an impressive timeframe of just 12 hours.

2. Prestigious Certifications: With utmost pride, we hold esteemed certifications including ISO 9001, CE, and SGS, ensuring the highest standards of quality.

3. Cost-Effective Excellence: Experience unbeatable value with our competitive pricing, while enjoying superior quality directly from our dedicated factory operations.

4. Impressive Production Capacity: Boasting a remarkable monthly production capability of 20,000 tons, we guarantee uninterrupted and efficient supply.

5. Adaptable Payment Solutions: We offer flexible payment options, accommodating various methods such as T/T and L/C to suit your convenience.

6. Rapid Delivery & Professional Export Packaging: Anticipate swift delivery as well as meticulously packaged products, adhering strictly to international export protocols.

7. Direct Factory Edge: Our proprietary factory empowers us to provide competitive pricing, steadfastly maintaining premium quality standards.

8. Independent Quality Verification: We encourage any third-party verification to substantiate the exceptional quality of our esteemed products.

9. Support from an Expert Team: Our expert sales team, coupled with a dependable factory, stands ready to support and guide you.

10.Commitment to Customized Excellence: Your unique requirements are celebrated as the foundation of our service. We pledge to fulfill each custom request with utmost dedication.

FAQ

Q1: What are your primary product offerings?

A1: We are a leading manufacturer and supplier of high-quality steel products, specializing in:
Stainless Steel & Carbon Steel: Sheets/plates, coils, and pipes/tubes (both seamless and welded)
Structural Components: Various bar profiles (round, square, hexagonal, flat, angle), C-channels, and H/I-beams
Custom Fabrications: Tailored solutions to meet specific project requirements

Q2: What quality assurance measures do you have in place?

A2: We maintain stringent quality control through:
Comprehensive Mill Test Certificates provided with all shipments
Optional third-party inspection services (SGS, BV, etc.)
ISO-certified manufacturing processes
Rigorous in-house testing and quality checks

Q3: What are your standard packaging terms?

A3: Our standard packaging includes:
Bundled or coiled goods secured with steel rods/straps
Custom packaging solutions available per customer specifications
Export-grade packaging to ensure optimal protection during transit

Q4: What is your typical delivery timeline?

A4: We offer flexible delivery options:
Stock items: Ready for shipment within 3 business days after deposit confirmation
Made-to-order items: Production typically completed within 7-15 working days post-deposit
Expedited options available for urgent requirements

Q5: What competitive advantages does your company offer?

A5: We differentiate ourselves through:
A team of highly skilled professionals and technical experts
Industry-leading pricing without compromising quality
Unparalleled after-sales support and customer service
Extensive inventory and reliable supply chain management

Q6: Do you provide product samples?

A6: Yes, we're pleased to offer:
Complimentary small samples from existing inventory
Customer only responsible for shipping costs
Custom samples available for specific project needs

Q7: What are your payment terms?

A7: Our standard payment structure:
30% advance payment via T/T to initiate production/order
Remaining 70% balance due prior to shipment
Full documentation including product photos and packaging details provided before final payment

Why Choose Us?

√ Quality Assurance: Rigorous testing and certification
√Competitive Pricing: Cost-effective solutions without compromise
√ Reliable Delivery: On-time fulfillment guaranteed
√ Custom Solutions: Tailored to your exact specifications
√ Expert Support: Technical guidance at every stage
For further inquiries or specific requirements, please contact our sales team. We're committed to providing exceptional service and top-quality steel products for your projects.