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HonED TUBES FOR HYDRAULIC & PNEUMATIC CYLINDERS

1. MATERIAL SPECIFICATION AND REF. document

ST52,BK+S,DIN2391 OR Equivalent

2. CHEMICAL COMPOSITION (%)

C (Max) Mn(Max) Si(Max) S(Max) P(Max)

0.22 1.6 0.5 0.035 0.035

3. MECHANICAL PROPERTIES

Elongation(Min) Y.S (Min.) UTS (Min.)

=15 470 N/MM2 580 N/MM2

4. SUPPLY CONDITION

Cold drawn seamless steel tube, stress relieved and honed or skived roller burnished

5. SURFACE ROUGHNESS

Ra = 0.4~0.8Micron

6. TOLERANCES ON INNER DIA

ISO H8

7.TOLERANCES ON WALL THICKNESS

= Dia120 +/-10 % of wall thickness

= Dia120 +/-10 % of wall thickness

8. STRAIGHTNESS

=1 mm/M

9. OD TOLERANCE

= Dia 40 +/-0.2 mm

= Dia 40 = Dia 100 +/-0.3mm

= Dia 100 +/-0.5mm

10. LENGTH AND CUT TOLERANCE

Length = 500mm , +2mm

> 500mm = 2000mm, +3mm

> 2000mm = 5000mm, +5mm

> 2000mm = 7000mm, +10mm