Q355B Honed Tube
The Q355B Honed Tube is a high-strength precision steel tube specially designed for hydraulic cylinder applications. Manufactured with advanced cold drawing and honing processes, it features exceptional dimensional accuracy, superior toughness, and a smooth internal surface finish. These properties ensure minimal friction, excellent sealing performance, and extended service life of hydraulic systems. Widely used in engineering machinery, lifting platforms, mining equipment, and industrial systems, Q355B honed tubes offer a cost-effective, durable, and reliable solution for demanding hydraulic applications.
Model:Honed Tube
Brand:EAST AI
Material:Q355B
Length:Max. 13m
ID Tolerance:H8 (customizable on request)
Straightness:0.5/1000
Application:Hydraulic cylinders for mobile equipment, industrial machinery, and heavy-duty systems
Packing:Wooden cases
Roughness:≤0.4u
Product Description
Advantages of Q355B Honed Tube
High Strength and Toughness
Q355B is a low-alloy high-strength structural steel with superior mechanical properties.
Ensures excellent load-bearing capacity for heavy-duty hydraulic cylinders.
Precision Surface Finish
Honing process produces a smooth bore surface with low roughness (Ra 0.2–0.8 μm).
Improves sealing, reduces leakage, and increases system efficiency.
Accurate Dimensional Tolerance
Tight ID and OD tolerance with roundness and straightness well-controlled.
Guarantees perfect fit with piston seals and hydraulic components.
Good Weldability and Machinability
Q355B material is easy to weld and machine, reducing manufacturing costs.
Ideal for fabricating custom hydraulic cylinder barrels.
Extended Service Life
Reduced friction and wear protect seals and extend cylinder lifespan.
High fatigue resistance makes it suitable for long-term use in harsh conditions.
Production Process of Q355B Honed Tube
To achieve the superior quality required in hydraulic applications, each Q355B honed tube undergoes a strict production process:
Raw Material Selection
Q355B seamless steel tubes are sourced with certified quality assurance.
Material is tested for chemical composition and mechanical properties.
Cold Drawing
Tubes are cold drawn to refine the microstructure, increase strength, and achieve accurate dimensions.
Heat Treatment
Stress-relieving or normalization improves toughness and dimensional stability.
Boring and Rough Machining
The inner bore is processed to remove defects and prepare for honing.
Honing Process
Multi-step honing ensures precision surface roughness (Ra 0.2–0.8 μm).
Bore roundness and straightness are precisely controlled.
Final Inspection
Each tube is tested for size tolerance, roughness, hardness, and mechanical performance.
Applications of Q355B Honed Tube
The Q355B Honed Tube is widely applied in industries where hydraulic power is critical:
Construction Machinery
Excavators, loaders, bulldozers, cranes.
Lifting Equipment
Aerial work platforms, scissor lifts, forklift trucks.
Mining Equipment
Hydraulic supports, drilling machines, dump trucks.
Agricultural Machinery
Harvesters, tractors, irrigation systems.
Industrial Systems
Press machines, hydraulic presses, manufacturing equipment.
Its combination of strength, toughness, and precision makes it an ideal choice for demanding environments.
Factory Inventory and Supply Capability
At EASTAI, we maintain a large inventory of Q355B honed tubes to meet urgent delivery needs of distributors, stockists, and engineering companies.
Standard Sizes in Stock
Multiple OD and ID combinations available.
Customized Production
Tailored solutions for non-standard dimensions.
Monthly Capacity
2,000+ tons of honed tubes.
Quick Delivery
Stock-ready sizes shipped within days.
Our robust inventory management ensures that partners can minimize downtime and maximize operational efficiency.
Quality Inspection of Q355B Honed Tube
To guarantee consistent quality, every tube undergoes rigorous testing:
Dimensional Inspection
OD, ID, wall thickness, and straightness measurement.
Surface Roughness Test
Ensuring Ra ≤ 0.8 μm.
Hardness Testing
To confirm material strength and durability.
Hydraulic Pressure Test
Verifying sealing and pressure resistance.
Eddy Current and Ultrasonic Test
Detecting internal or external defects.
Salt Spray Test (upon request)
For corrosion resistance evaluation.
Certificates and Compliance
Our Q355B Honed Tubes comply with international standards and certifications:
ISO 9001:2015 Quality Management System
GL Approval of Material Manufacturers (AMM)
Mill Test Certificate (EN 10204 3.1/3.2)
Compliance with DIN 2391, EN 10305, ASTM A519 standards
These certifications ensure reliability and traceability for engineering projects worldwide.
