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Standard | DIN2391, EN10305, JIS G3445, ASTM A519, GB/T 8713... | ||
Material | ST45, ST52, E355, E355SR, STKM13C, SAE1026, 20#, Q235B, CK45... | ||
Heat treatment | BK+S | ||
Specification | Outer diameter(mm) | Inner diameter(mm) | |
50-300mm | 40-250 | ||
I.D Tolerance | H8-H9 | ||
Length | 3-9m (Customers usually choose the 4~5.8m) | ||
Straightness | 1/1000 | ||
ID roughness | RA 0.4micron(max) | ||
Technology | Honed & SRB(SKIVED AND ROLLER BURNISHED ) | ||
Scope | Honed tube for hydraulic cylinder, swivel crane, injection machine and construction machine application | ||














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