Technical specification
Steel grade: St 52.3N / St 52.0 /
St 52 bk+s
Straightness: 1 : 1.000 mm
Tolerance O.D.: acc. DIN 2391 cold drawn
acc. DIN 2448/1629
hot rolled
Tolerance I.D.: acc. ISO H8 (H9 / H10)
depending on size
Roughness: Ra max. 0,5 µm
Random lengths: 6.000 – 9.000 mm
Material identification
Each tube is marked with code number which always
enables to find a chemical composition certificate for the
given source product.
Each tube is delivered with quality certificate according to
DIN 50049/3.1b
Packing and storing
Protected from corrosion with oil and then closed by means
of plastic stoppers