Carbon Steel O.D. Ground Tube
Precision Outer Diameter Ground Steel Tube for Hydraulic & Industrial Applications.
Product Overview
Carbon Steel O.D. Ground Tube is a precision steel tube designed for hydraulic and mechanical applications requiring high dimensional stability, controlled surface integrity, and consistent fatigue resistance under cyclic pressure loading.
It is manufactured through a controlled industrial process including hot rolling or cold drawing, optional heat treatment, and precision outer diameter grinding (OD grinding) to ensure stable geometry and repeatable performance in industrial production environments.
This product is widely used in hydraulic cylinders, pneumatic systems, automotive components, and precision mechanical assemblies, where long-term reliability and batch consistency are critical.
Manufacturing Capability & OEM Supply Stability
We operate a dedicated production system focused on long-term OEM supply for industrial customers.
- Annual production capacity: 50,000+ tons
- OD grinding lines: 12 sets
- Cold drawing / finishing lines: 8+ lines
- Supply model: OEM production + long-term contract manufacturing
- Export markets: North America / Europe / South America / Southeast Asia
Production Stability Statement
Our manufacturing system is designed to ensure repeatable batch-to-batch consistency, which is essential for hydraulic system manufacturers requiring stable long-term sourcing without specification deviation.
International Standards & Verified Compliance
Our products are manufactured in accordance with internationally recognized standards:
•EN 10305-1 – Precision cold drawn steel tubes for hydraulic applications
•ASTM A519 – Seamless carbon and alloy steel mechanical tubing
•ISO 3304 – Dimensional tolerance standards for steel tubes
Verified Quality Documentation (Available per Batch)
Each shipment can be supported with independently verifiable documents:
•Mill Test Certificate (MTC) issued per batch
•Chemical composition analysis report
•Dimensional inspection report
•Mechanical hardness test report
•Straightness & roundness inspection report
•Third-party inspection reports (SGS / BV / TÜV available upon request)
•Full traceability record from raw material to finished product
Key Engineering Performance
Dimensional Accuracy Control
•Outer diameter tolerance: ±0.01 – ±0.02 mm (depending on specification)
•Stable repeatability across mass production batches
•Suitable for hydraulic sealing and precision assembly systems
>Engineering principle:
Dimensional precision is achieved through controlled cold drawing and OD grinding, eliminating forming deviation and ensuring geometric consistency in mass production.
Surface Integrity (OD Grinding Process)
•Surface roughness: Ra ≤ 0.4 – 0.8 μm
•Uniform surface condition across production batches
•Improved wear resistance in dynamic hydraulic systems
>Technical explanation:
OD grinding removes surface defects such as micro-cracks, decarburized layers, and forming marks generated during previous processing stages, improving fatigue resistance under cyclic loading conditions.
Fatigue Resistance & Operational Stability
•Improved resistance to cyclic hydraulic pressure loading
•Stable roundness under dynamic mechanical stress
•Straightness: ≤ 1.0 mm/m (or tighter upon request)
>Application relevance:
Hydraulic systems operate under continuous pressure cycles. Improved geometric stability reduces stress concentration and extends service life of seals, pistons, and cylinder components.
Material Control System
•Material grades: SAE 1010 / SAE 1020 / ST52 / ASTM A106 or customized
•Controlled chemical composition for batch consistency
•Optional heat treatment: Normalizing / stress relieving
Quality Assurance & Traceability System
Each production batch is controlled under a structured quality system:
Raw material traceability from steel mill to finished tube.
Dimensional inspection using precision measuring equipment (micrometer / CMM).
Surface roughness testing (profilometer).
Mechanical hardness testing (Brinell / Rockwell).
Straightness and roundness inspection.
100% final inspection before shipment.
Quality Control Principle
We apply process-based quality control instead of final inspection-only methods, ensuring consistency at every production stage and reducing batch variation risk.
Third-Party Verification & Procurement Risk Control
To support international procurement requirements, we provide:
Third-party inspection: SGS / BV / TÜV (optional per order)
Mill Test Certificate (MTC) for each production batch
Full traceability documentation (raw material → finished product)
Pre-shipment inspection reports available upon request
Procurement Risk Reduction Framework
These systems are designed to allow buyers to independently verify product quality and reduce procurement risk in global supply chains.
Export Packaging & Delivery Assurance
Anti-corrosion oil protection for long-distance transport.
Seaworthy export packaging standards.
Steel bundle reinforcement for container loading.
Moisture-proof and impact-resistant packaging options.
Applications
Carbon Steel O.D. Ground Tubes are widely used in:
Hydraulic cylinder systems
Pneumatic equipment
Automotive shock absorbers
Agricultural machinery
Industrial automation systems
Precision mechanical assemblies
Technical Specifications
|
Item |
Specification |
|
Material |
SAE 1010 / SAE 1020 / ST52 / ASTM A106 / Customized |
|
Standards |
EN 10305-1 / ASTM A519 / ISO 3304 |
|
Outer Diameter |
10 mm – 300 mm |
|
Wall Thickness |
1 mm – 20 mm |
|
Length |
1 m – 12 m or customized |
|
OD Tolerance |
±0.01 – ±0.05 mm |
|
Surface Roughness |
Ra ≤ 0.4 – 0.8 μm |
|
Straightness |
≤ 1 mm / meter |
|
Process |
Cold Drawn + OD Ground |
|
Heat Treatment |
Optional |
Why Choose Us
Stable OEM manufacturing system for industrial supply chains.
Compliance with international standards (EN / ASTM / ISO).
Precision OD grinding for hydraulic-grade applications.
Full traceability and verifiable quality documentation system.
Third-party inspection support for procurement risk control.
Long-term supply capability for global OEM customers.
FAQ
Q: What is an O.D. Ground Tube?
A: An O.D. Ground Tube is a precision steel tube whose outer diameter is finished by grinding to achieve tight dimensional tolerances and high surface integrity for hydraulic applications.
Q: How do you ensure product consistency?
A: We use process-controlled manufacturing combined with full-stage inspection and batch traceability to ensure consistent dimensional and mechanical performance across production batches.
Q: What quality documents can be provided?
A: We provide:
Mill Test Certificate (MTC)
Chemical composition report
Dimensional inspection report
Mechanical hardness report
Third-party inspection report (SGS / BV / TÜV upon request)
Q: Can buyers independently verify product quality?
A: Yes. We support third-party inspection and provide full traceability documentation to allow independent verification before shipment.
Q: Do you support OEM and long-term supply contracts?
A: Yes. We specialize in OEM production and long-term supply agreements for industrial customers requiring stable and continuous sourcing.
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