Grade：ST 52
Size range:
Inside diameter from 40 to 250mm
Max length 14m.
Straightness: 0.5 /1000
Tolerance INT: ISO H9
Tubes are provided according to the norm EN10305-1, DIN 2391
Type：cold drawing
ST 52 CHEMICAL COMPOSITION (%)
| Si (Max) |
Mn (Max) |
C (Max) |
P (Max) |
S (Max) |
| 0.55 | 1.6 | 0.22 | 0.025 | 0.025 |
MECHANICAL PROPERTIES
| Tensile strength Min | Yield Point Min | Elongation % Min |
| 580 N/mm² | 420 N/mm² | 10 |
EXCENTRICITY
| Outer Diameter | Excentricity |
| 125 mm | 5% |
| > 125 mm | 7% |
measured according to the formula:
E = (max Wt – min Wt)/( max Wt + min Wt) x 100 %
BORE OVALITY
The bore ovality is comprised in the 50 % of the inside diameter tolerances.
Marking: JW, 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: -20℃, 27 J (only for special requirement)
