Detailed Product Description

hydraulic cylinder tube:

GradeST45.8, ST 52.3 BK+S
Metric size
O.D: 30 to 700mm, Max length 12m.
Straightness: 0.5 -1.0/1000
Tolerance EXT: DIN 2391
Tolerance INT: ISO H8
Roughness(Ra): 0.2 to 0.4μ
Typecold drawing, cold rolling, honed

Marking: JW, material grade, specification
Length: unbending length or fix length
Package: steel strip bundle, knitting strip bundle or steel box.
Conservation: Anti rust oiled inside and outside surface, cap in both end.
WELD ABILITY
Very good weld ability according to the common welding system.

Impact test: -20, 27 J (only for especial require)
 
TOLERANCES
1.OUTER DIA
<40mm ±0.2mm
FROM 40 TO 100mm±0.3mm
>100mm±0.5mm
2.WALL THK
<120mm OD±5%
>120mm±7.5%