Qingzhou Longyue Hydraulic Machinery Co.,Ltd



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St52 Honed Tube
St52 Honed Tube

St52 Honed Tube

Specefication Standard: DIN2391, EN 10305, JIS G3445, ASTM A519, GB/T 8713… Material: ST45, ST52, E355, E355SR, STKM13C, SAE 1026, 20#, Q235B, CK45… Heat treatment: BK+S Specification: Out diameter: 20-800mm, Inner diameter: 40-250mm I.D Tolerance: H7-H8 Length: 3-13m (Customers usually choose the 4-5.8m) Straightness: 1/1000 ID roughness: RA 0.8-1.6 micron (max) Technology: Cold drawn Scope: Honed tube for hydraulic cylinder, swivel crane, injection machine and construction machine application

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  • Product Details

Steel Grades

ST52 ST45 E355

Quality Standards

→DIN 2391 Seamless Precison Steel Tubes

→EN10305 Steel Tubes for Precision Applications Seamless Cold Drawn Tubes

→ASTM A519 Standard Specification for Seamless Carbon and Alloy Steel Mechanical Tubing

→JIS G3445 Carbon Steel Tubes for Machine Structural Purposes


Longyue's hydraulic honed tube is produced using our "Suitable To Hone" Drawn Over Mandrel (DOM) and Cold Drawn Seamless (CDS). 

The honing process involves using abrasive polishing stones and abrasive paper to remove small amounts of material, to produce extremely precise ID dimensions and improved finishes.

Honed tube is ready to use for hydraulic cylinder applications without further ID processing.

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