ASTM A519 Structural Seamless Hollow Steel Pipes Alloy Steel Shaped Tube Pipe

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Product Description

📋 Overview - Basic Info
Model NO.
smls
Material
Carbon Steel
Surface Treatment
Antiseptical
Usage
Hydraulic/Automobile Pipe, Machinery Industry
Section Shape
Special Section
Outer Diameter
10-120mm (0.4 Inch - 4.7 Inch)
Wall Thickness
1-20mm (0.04 Inch - 0.78 Inch)
Tolerance
±0.15mm
Capacity
50000 Ton/Year
📦 Product Description

Seamless Steel Pipe/Tube: Seamless steel pipe is a type of steel pipe made of a single piece of metal with no joints on the surface. The production methods include hot rolling, cold rolling, cold drawing, extrusion, and pipe jacking. Available in circular and irregular shapes including square, elliptical, triangular, hexagonal, etc.

The diameter varies from 650 millimeters to several millimeters, with wall thicknesses ranging from thick-walled to thin-walled. Widely used for conveying fluids, structural components, boilers, chemicals, electricity, petroleum, and automotive manufacturing.

Seamless Steel Pipe
📊 Product Parameters
Parameters Overview
Technical Specifications
Main Production Category Seamless Steel Tube/Pipe, Cold Drawn Steel Bar, Precision Welded Pipe, Rebar Coupler, Further Processing
Outer Diameter 10-120mm (0.39 inch - 4.72 inch)
Wall Thickness 1-20mm (0.039 inch - 0.79 inch)
Tolerance Standard ±0.10mm, Superior ±0.05mm
Technique Cold Drawn / Cold Rolled
Material Grade (Carbon) 10#, 20#, 45#, Q235B, ASTM 1010-1050, DIN ST35-ST52
Material Grade (Alloy) 16Mn, 40Cr, 15CrMo, 42CrMo, ASTM 4130, 4140
⭐ Our Advantages
Precise custom outer diameter and inner diameter.
Tight tolerances, resulting in reduced machine time and high dimensional accuracy.
Smooth and Clean OD and ID surfaces.
Small batch, high quality customization.
Excellent machining characteristics.
Product Advantages
⚙ Production & Inspection Process

We maintain a full-process production line where delivery time and quality are strictly guaranteed through integrated monitoring.

Production Process
Quality Assurance Inspection

Quality Guarantee: Ultrasonic & eddy current flaw detection integrated machine detects defects on inner and outer surfaces with accuracy up to 0.02mm.

🚢 Package and Shipment

Standard Export Packaging, suitable for long-distance sea transportation to ensure products arrive in perfect condition.

Packaging and Shipment
🏭 About The Manufacturer

Established in 2004, we are a technology-based manufacturer integrating seamless steel tube design, R&D, and production with an annual capacity of over 60,000 tons. We have focused on R&D of seamless steel tubes for more than 30 years.

Our self-customized high-precision straightening machine helps customers improve post-processing efficiency and increase equipment lifespan.

Factory Overview
Manufacturing Detail
Workshop
📜 Certifications
Certifications
❓ FAQ
FAQ Image
1. What is the Minimum Order Quantity (MOQ)?
Our standard MOQ is 5 tons per size.
2. What are your payment terms?
We accept L/C or T/T, with a 30% deposit and the remaining 70% balance against the copy of the Bill of Lading (BL).
3. How long is the typical delivery time?
Delivery usually takes 30-50 days. This includes the full production cycle: perforation, pickling, annealing, cold rolling/drawing, straightening, and final inspection.
4. Do you provide a quality warranty?
Yes. Any quality issues that do not comply with the contract specifications before the use of the tubes are eligible for a return or refund.
5. Can you produce special shapes other than round?
Yes, we can customize various irregular shapes including square, elliptical, triangular, and hexagonal tubes based on your specific requirements.
6. What testing methods are used for quality assurance?
We utilize Ultrasonic & eddy current flaw detection, tensile tests, and manual finished product inspections to ensure all products meet international standards.

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