Grade : ST52

Metric size Outside diameter from 40 to 406mm, Max length 14m.

Straightness: 1 /1000mm or better

Tolerance EXT: DIN 2391 Tolerance INT: ISO H8

Roughness :(Ra) 0.2 to 0.4

Type:cold drawing, normalizing treatment, honing or skiving.

CHEMICAL COMPOSITION (%) Si (Max) Mn (Max) C (Max) P (Max.) S (Max)

                                           0.55     1.60         0.22      0.025   0.025

MECHANICAL PROPERTIES :

Tensile strength      Min Yield Point    Min Elongation % Min

      580 N/mm2          420 N/mm2          10

Length: unfixed length or fixed length
Package: bunding with steel strips

Conservation: Anti rust oiled coating on the inside and outside of the surface, plastic caps at both ends.