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Graded:St 52
Metric size: Inside diameter from 40 to 250mm
Max length:14m.
Straightness:0.5 /1000
Tolerance INT:ISO H9
Type: cold drawing
Tubes are provided according to the norm EN10305-1, DIN 2391
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
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: 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: -20℃, 27 J (only for special requirement)
Graded:St 52
Metric size: Inside diameter from 40 to 250mm
Max length:14m.
Straightness:0.5 /1000
Tolerance INT:ISO H9
Type: cold drawing
Tubes are provided according to the norm EN10305-1, DIN 2391
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
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: 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: -20℃, 27 J (only for special requirement)