Standard DIN2391, EN10305, ASTM A519, GB/T 8713 etc. Material ST45, ST52, E355, E355SR, STKM13C, 27SiMn SAE1020, C20 Q235B, CK45, etc. Heat treatment BK+S condition Specification Outer diameter(mm)                               Inner diameter(mm)                               50-299 40-250 I.D Tolerance H8~H9 Length 3-9 Mtr (Suggested length 3-5.8 Mtr suitable for 20' container) Straightness 0.3/1000 ID roughness RA 0.4 micron(max) Technology Honing Scope Honed tube for hydraulic cylinder, crane, injection machine and construction machine application Foton Light Truck Spare Parts,Foton Spare Parts,Foton Truck Spare Parts,Foton Light Truck Spares Jinane Baisheng International Trade Co.,Ltd , https://www.jnbisontruck.com
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E355 Carbon Seamless Precision SRB H8 Honed Steel Tube