... the very root for the company to survive and expand. In May 2003 Toncom compnay passed ISO9001 Quality Certification.We have ... -to-order high-precision machine chassis and frames. Standard: AISI, ASTM, BS, DIN, GB, JISGrade: SGCH,SGCC, DX51D,Q195Thickness: 0.10mm ... : About 60g-180g/m2Technique: hot rolled and cold rolled AISI, ASTM, BS, DIN, GB, JIS Galvanized steel coil