... , GB/T14975, GB/T3090,A269, A213, A312, A490...DIN Standard: DIN17456, DIN17458... EN Standard: EN10216, EN10305JIS StandardApplications: Heat exchanger ,Industry,Automobile parts,Textile ... hydraulic, pneumatic control components. Both inside and outside the roughness of up to Ra0.2-0.4, both inside and outside ...