honed tube
GradeST45.8, ST 52

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

Type: cold drawing, cold rolling, honed

CHEMICAL COMPOSITION (%)

MECHANICAL PROPERTIES

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 OD                                ±7.5%