Specification :

Grade: ST 52
Size range
Inside diameter from 40 to 1000mm, Max length 20 meters.

Straightness: 0.5 / 1000
Tolerance EXT: DIN 2391
Tolerance INT: ISO H8
Roughness( Ra) : 0.2 to 0.4u
Type: cold drawing, normalizing treatment, honing.

Marking: SunnySteel, ID, OD
Length: unfixed length or fixed length
Package: banding with steel strips, braiding parcel at outside
Conservation: Anti rust oiled coating on the inside and outside of the surface, plastic caps at both ends.
Impact test: -20Degrees Celsius , 27 J ( only for special requirement)

High precision cold drawn tube( ready to honed tube) can also be supplied.