Material: GCr15 Standard: as per ASTM, DIN, JISG Size: OD:9mm~95mm; WT:1.5mm~10mm ... all kinds of steel tubes, we are rich in experices and advanced technic in producing seamless steel tube.Material: carbon steel series ... , 1020, 1026, 1045, SAE52100, GCr15 T11, T12, T22Standard: as per ASTM, DIN, JIS, GBSize: OD: 9-91mm, WT:1-12mm, L ...