Round Carbon Steel Pipe - High-Strength Seamless Tubing for Industrial Applications

Kuaima Steel Co., Ltd.

Verified Custom manufacturer · 7 yrs ·

China

Customizable Rock-bottom price

$560 1-49 ton Base price

$535 50-99 ton 4.5% off

$525 ≥100 ton 6.3% off

Price validity: subject to market conditions

Supplier's customization ability

Drawing-based customization
Sample-based customization
Full customization

Quantity

Minimum order quantity: 1 ton

Shipping total: To be negotiated

Subtotal of goods US$ 560.00

Start order request

Payment and delivery

Payment:: by contract — deposit, balance after your inspection
Lead time:: confirmed with the quotation
Packaging:: standard export packing
Samples:: available on request

Product details

Technical Specifications of Round Carbon Steel Pipe

Property	Parameter	Description
Product Name	Round Carbon Steel Pipe	Circular cross-section carbon steel tubular product
Material Grade	ASTM A53 Grade B / ASTM A106 Grade B / API 5L Grade B	Common international grade equivalents
Standard Compliance	ASTM A53, ASTM A106, API 5L, EN 10210, GB/T 8162	Meets major international pipe standards
Manufacturing Process	Seamless (SMLS) / ERW / LSAW	Hot-rolled seamless or welded production methods
Carbon (C)	≤0.30%	Carbon content for structural strength
Manganese (Mn)	0.29–1.06%	Improves hardenability and tensile strength
Phosphorus (P)	≤0.035%	Controlled for improved ductility
Sulfur (S)	≤0.035%	Low sulfur for better weldability
Silicon (Si)	≥0.10%	Acts as deoxidizer and strengthener
Tensile Strength	≥415 MPa	Minimum value per ASTM A106 Grade B
Yield Strength	≥240 MPa	Minimum yield strength requirement
Elongation	≥30%	Ductility in 50mm gauge length
Outer Diameter (OD)	10.3mm–914mm (1/8''–36'')	Available round pipe diameter range
Wall Thickness	1.0mm–60mm (SCH 10–SCH XXS)	Standard and heavy-wall thickness options
Length	5.8m, 6m, 11.8m, 12m or custom	Random and fixed length available
Surface Treatment	Black painted, oiled, galvanized, varnished	Multiple anti-corrosion surface options
Application	Construction, oil & gas, water supply, mechanical structure	Typical industrial application fields
Certification	EN 10204 3.1, ISO 9001, API 5L, ABS/DNV/LR	Quality and third-party certifications
Packaging	Bundled with steel strips, plastic caps on ends	Standard seaworthy export packaging
MOQ	5 tons	Minimum order quantity

Round Carbon Steel Pipe - High-Strength Seamless Tubing for Industrial Applications

Round carbon steel pipe is a fundamental structural and conveyance product employed across construction, petroleum, mechanical engineering, and general industrial sectors. Manufactured from low to medium carbon steel grades, this tubular product delivers robust mechanical strength, reliable weldability, and cost-effective performance for pressure service, structural framing, and fluid transportation. Whether you require seamless or welded configurations, our mill-direct round carbon steel pipe meets rigorous international standards to serve contractors, fabricators, and project engineers worldwide.

What Is Round Carbon Steel Pipe?

Round carbon steel pipe refers to hollow cylindrical steel tubing with a circular cross-section, produced from carbon steel alloys where carbon content typically ranges from 0.06% to 0.30% by weight. It is available in seamless (hot-rolled or cold-drawn) and welded (ERW or LSAW) forms, serving as a versatile solution for high-pressure pipelines, load-bearing structures, and mechanical assemblies.

Round carbon steel pipe supplier

Round Carbon Steel Pipe Technical Specifications

Our round carbon steel pipe conforms to multiple recognized standards to ensure consistent quality and traceability across global markets.

Parameter	Specification
Applicable Standards	ASTM A106 Grade B, ASTM A53 Grade B, API 5L Grade B, EN 10210, GB/T 8162
Outside Diameter	21.3 mm – 610 mm (1/2″ – 24″)
Wall Thickness	2.0 mm – 60 mm (SCH 10 – SCH XXS)
Length	5.8 m, 6 m, 11.8 m, 12 m or custom cut-to-length
Yield Strength (ASTM A106 Gr.B)	≥ 240 MPa minimum per ASTM A106/A106M-19a
Tensile Strength (ASTM A106 Gr.B)	≥ 415 MPa minimum
Carbon Content (A106 Gr.B)	≤ 0.30% maximum
Surface Finish	Black painted, oiled, varnished, or galvanized
End Type	Plain end, beveled end, or threaded and coupled

Key Applications of Round Carbon Steel Pipe

Oil & Gas Pipelines: Seamless round carbon steel pipe manufactured to API 5L PSL1/PSL2 serves critical roles in upstream gathering lines and downstream transmission networks operating at pressures up to 2,500 psi.
Structural & Construction: Architects and engineers specify this tubing for columns, trusses, scaffolding, and piling due to its superior tensile properties and consistent dimensional tolerances per EN 10210-2:2019.
Boiler & Heat Exchanger Service: ASTM A106 Grade B seamless pipe finds extensive application in power plants and refineries where operating temperatures reach 400°C (750°F).
Mechanical & General Fabrication: Machine builders and fabricators rely on carbon steel round tubing for shafts, cylinders, and conveyor components requiring exceptional mechanical strength.

Frequently Asked Questions

What is the minimum order quantity (MOQ) for round carbon steel pipe?

Our standard MOQ starts at 5 metric tons per size and specification. For project-based procurement or trial orders, smaller quantities may be arranged upon request.

Do you provide material test certificates?

Yes. Every shipment includes EN 10204 Type 3.1 Mill Test Certificates (MTC) detailing chemical composition, mechanical properties, hydrostatic test results, and dimensional inspection records.

Round carbon steel pipe wholesale

What is the typical delivery time?

Stock items in common sizes ship within 7–10 business days. Custom-manufactured round carbon steel pipe with specific wall thicknesses or coatings typically requires 25–35 days from order confirmation.

Round carbon steel pipe China

Can you cut to custom sizes?

Absolutely. We offer precision cut-to-length service, beveling, threading, and groove preparation. Tolerances comply with ASTM A530/A530M standard requirements for carbon steel pipe processing.

Get a Competitive Quote for Round Carbon Steel Pipe

Sourcing reliable round carbon steel pipe at factory-competitive pricing starts with the right supplier. Contact our technical sales team today with your project specifications—including grade, diameter, wall thickness, quantity, and delivery destination—and receive a detailed quotation within 24 hours. We support OEM packaging, third-party inspection, and flexible payment terms for bulk orders.

Ratings & Reviews

4.5

Based on 8 reviews

5 5

4 2

3 1

2 0

1 0

Wei Chen

Singapore

2025-02-25

Perfect Mill-Direct Pricing on Carbon Steel Pipe for Regional Distribution

As a regional steel distributor serving Southeast Asian contractors, we placed a consolidated order of 55 tons across multiple sizes — OD 33.7mm to 219.1mm, various wall thicknesses, mix of ASTM A53 Grade B ERW and ASTM A106 Grade B seamless. This is our fourth order with this supplier. Mill-direct pricing allowed us to remain competitive against local stockists while maintaining full 3.1 MTC traceability, which our end customers in the oil and gas sector require. OEM bundling with our company labels was handled correctly. Shipment was consolidated into two 20-foot containers and loaded within 9 days for the stock items. The technical sales team prepared a detailed packing list and certificate set that cleared Singapore customs without any queries. Consistent quality and documentation across all four orders is why we keep returning.

Chris Martin

Canada

2025-03-18

Acceptable Carbon Steel Pipe Quality — Coating Issue Resolved

Ordered 8 tons of round carbon steel pipe, OD 114.3mm, SCH 40, black painted finish, ASTM A106 Grade B, for a mechanical contractor client. The pipe dimensions and mechanical properties per the MTC were correct and delivery arrived in 10 business days as quoted. However, approximately 15% of the pipes in one bundle showed uneven paint coverage with thin spots near the pipe ends, which was a concern for our client's corrosion protection requirement. Raised this with the supplier immediately — they responded within 12 hours and offered a partial credit plus priority supply of replacement pieces on our next order. The issue was handled professionally and the resolution was fair. Mechanical performance of the material itself was not in question. Would give a trial order again to see if coating consistency has improved.

Carlos Silva

Brazil

2025-04-13

Reliable Carbon Steel Round Tube for Mechanical Fabrication

We placed an order for 10 tons of cold-drawn carbon steel round tube, OD 76.1mm and 101.6mm, SCH 20 wall, for conveyor shaft and cylinder components in our agricultural machinery production line. The material chemistry was within GB/T 8162 limits and our machining team confirmed the microstructure was uniform with no hard spots during turning operations. Documentation package was complete including dimensional inspection records. Delivery was 31 days as this was a non-stock specification — acceptable given the lead time was communicated clearly upfront. Pricing was slightly above our local market but the quality consistency justified the premium, as we had scrapping issues with a previous local supplier. Will consider for future mechanical tubing requirements.