Chrome-plated honed tube
Request a Quote>Grade：ST 52
Metric size：
Inside diameter from 40 to 300mm,
Max length 16m.
Straightness: 0.5 /1000
Tolerance EXT: DIN 2391
Tolerance INT: ISO H8
Roughness(Ra): 0.2 to 0.4µ
Tolerance EXT: DIN 2391
Tolerance INT: ISO H8
Roughness(Ra): 0.2 to 0.4µ
Chrome thickness: 20 TO 50 Micron
Type：cold drawing, normalizing treatment, honing, chrome outside surface.
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: wooden box
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)
Tolerance standard
|
ID(mm)
|
TOLERANCE(mm)
|
|||
|
H7
|
H8
|
H9
|
H10
|
|
|
≦30
|
+0.021/0
|
+0.033/0
|
+0.052/0
|
+0.084/0
|
|
30 - ≦50
|
+0.025/0
|
+0.039/0
|
+0.062/0
|
+0.100/0
|
|
50 - ≦80
|
+0.030/0
|
+0.046/0
|
+0.074/0
|
+0.120/0
|
|
80 - ≦120
|
+0.035/0
|
+0.054/0
|
+0.087/0
|
+0.140/0
|
|
120 - ≦180
|
+0.040/0
|
+0.063/0
|
+0.100/0
|
+0.160/0
|
|
180 - ≦250
|
+0.046/0
|
+0.072/0
|
+0.115/0
|
+0.185/0
|
|
250 - ≦315
|
+0.052/0
|
+0.081/0
|
+0.130/0
|
+0.210/0
|
|
315 - ≦700
|
+0.057/0
|
+0.089/0
|
+0.140/0
|
+0.230/0
|
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