H8 Tubes

H8 Tubes

Hydraulic cylinder tubes are produced with H8 tolerance in accordance with DIN 2391 (EN 10305-1) standards. Standard OD range is 50 mm - 320 mm; and the standard length is between 6 m - 9 m. H8 tubes are produced from cold drawn seamless St52 material, heat treatment in BK + S standards.

Standard

  • OD : 50 mm - 350 mm
  • Length : 6 m - 9 m
  • Material : St 52 BK+S (E355 SR)

On Demand

  • OD : 350 mm - 400 mm
  • Length : 9 m - 14 m
  • Material : St 52 BK+S (E355 SR)
  • ID Tolerance : H8
  • Surface Roughness : 0,4 - 0,8 micron
  • Quality Standard : DIN 2391 (EN 10305-1)
  • Material : St 52 BK+S
  • Tensile Strength : min 640 Mpa
  • Elongation : 11,5%
  • Impact Strength (-20 C) : min 40 J
40 mm x 50 mm 50 mm x 60 mm 50 mm x 65 mm
60 mm x 70 mm 60 mm x 75 mm 60 mm x 80 mm
70 mm x 80 mm 70 mm x 85 mm 70 mm x 90 mm
75 mm x 90 mm 80 mm x 90 mm 80 mm x 95 mm
80 mm x 100 mm 90 mm x 105 mm 90 mm x 110 mm
100 mm x 115 mm 100 mm x 120 mm 100 mm x 125 mm
110 mm x 125 mm 110 mm x 130 mm 115 mm x 130 mm
120 mm x 135 mm 120 mm x 140 mm 120 mm x 145 mm
125 mm x 140 mm 125 mm x 150 mm 130 mm x 150 mm
130 mm x 160 mm 130 mm x 160 mm 140 mm x 170 mm
140 mm x 165 mm 140 mm x 170 mm 150 mm x 180 mm
160 mm x 180 mm 160 mm x 185 mm 160 mm x 190 mm
170 mm x 200 mm 180 mm x 200 mm 180 mm x 210 mm
190 mm x 215 mm 200 mm x 220 mm 200 mm x 230 mm
200 mm x 245 mm 220 mm x 245 mm 220 mm x 270 mm
250 mm x 280 mm 250 mm x 300 mm 250 mm x 325 mm
300 mm x 350 mm 320 mm x 377 mm 350 mm x 400 mm

Production Stages for H8 Tubes

01

Cold Drawing

02

Stress Relieving

03

Roller Burnishing

All Hydraulic Cylinder Tubes Properties

Hydraulic Cylinder Tubes Cold Drawn Seamless Heat Treatment ID Tolerance Material
H8 Tubes H8 St 52 BK+S
H9 Tubes   H9 St 52
Ready-to-Hone Tubes 0,6 mm - 0,9 mm St 52 BK+S