EAST AI Hydraulic Manufacturer
Since 2006
Since 2006
Q355B is a low-alloy high-strength structural steel with superior mechanical properties.
Ensures excellent load-bearing capacity for heavy-duty hydraulic cylinders.
Honing process produces a smooth bore surface with low roughness (Ra 0.2–0.8 μm).
Improves sealing, reduces leakage, and increases system efficiency.
Tight ID and OD tolerance with roundness and straightness well-controlled.
Guarantees perfect fit with piston seals and hydraulic components.
Q355B material is easy to weld and machine, reducing manufacturing costs.
Ideal for fabricating custom hydraulic cylinder barrels.
Reduced friction and wear protect seals and extend cylinder lifespan.
High fatigue resistance makes it suitable for long-term use in harsh conditions.
To achieve the superior quality required in hydraulic applications, each Q355B honed tube undergoes a strict production process:
Q355B seamless steel tubes are sourced with certified quality assurance.
Material is tested for chemical composition and mechanical properties.
Tubes are cold drawn to refine the microstructure, increase strength, and achieve accurate dimensions.
Stress-relieving or normalization improves toughness and dimensional stability.
The inner bore is processed to remove defects and prepare for honing.
Multi-step honing ensures precision surface roughness (Ra 0.2–0.8 μm).
Bore roundness and straightness are precisely controlled.
Each tube is tested for size tolerance, roughness, hardness, and mechanical performance.
The Q355B Honed Tube is widely applied in industries where hydraulic power is critical:
Excavators, loaders, bulldozers, cranes.
Aerial work platforms, scissor lifts, forklift trucks.
Hydraulic supports, drilling machines, dump trucks.
Harvesters, tractors, irrigation systems.
Press machines, hydraulic presses, manufacturing equipment.
Its combination of strength, toughness, and precision makes it an ideal choice for demanding environments.
At EASTAI, we maintain a large inventory of Q355B honed tubes to meet urgent delivery needs of distributors, stockists, and engineering companies.
Multiple OD and ID combinations available.
Tailored solutions for non-standard dimensions.
2,000+ tons of honed tubes.
Stock-ready sizes shipped within days.
Our robust inventory management ensures that partners can minimize downtime and maximize operational efficiency.
To guarantee consistent quality, every tube undergoes rigorous testing:
OD, ID, wall thickness, and straightness measurement.
Ensuring Ra ≤ 0.8 μm.
To confirm material strength and durability.
Verifying sealing and pressure resistance.
Detecting internal or external defects.
For corrosion resistance evaluation.
Our Q355B Honed Tubes comply with international standards and certifications:
These certifications ensure reliability and traceability for engineering projects worldwide.
