St52 BK Ready to Honed Cold Drawn Seamless Tube
DIN2391 Precision Seamless Steel Tube
O.D.: 6-256mm, W.T.:1-25mm,
Length: 5.2-5.8M random length, 5.5M fixed length, 5.8M fixed length
Size Tolerance: O.D.±0.10mm, I.D.±0.10mm
Material: St52 (DIN2391), E355 (EN10305-1)
Delivery Condition: BK, +LC
1. Cold drawn/Rolled steel pipe without anneal +BK condition
OD roughness : Ra 0.8um
2. Cold drawn/Rolled steel pipe annealed +BKS condition
Od roughness; Ra 0.8um, stress relieved, good mechanical property.
3. ID honed/ OD without polishing.
ID roughness>ra0.8um , High precision with Good quality ID tolerance H8
4. ID honed/ OD Polished.
ID tolerance ; H8 , roughness; ra0.4-ra0.6um
100% Eddy Current Testing.
100% Size Tolerance Checking.
100% Tube surface checking to avoid surface defects.