Honed Tube----Cold Drawn Cylinder Tubes and Hard Chrome Bars

Honed Tube----Cold Drawn Cylinder Tubes and Hard Chrome Bars

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Cold Drawn Cylinder Tubes Suitable To Hone (HPZ)

Specification:EN 10305 part 1/2 (former DIN 2391/3) 

Grade:E355 (St 52), other materials upon request 

Delivery condition:+ SR (BK+S) cold drawn and stress-relieved

Finish: Random lengths Cut lengths 

Outside diameter:30 to 200 mm 

Wall thickness:5 to 20 mm 

Certification:3.1 according to EN 10204, others upon request

Cold Drawn and Hot Finished Cylinder Tube with Honed or Skived- Roller Burnished Bore (HP)

Specification: Cold Drawn EN 10305-1/2 (former DIN 2391/3) 

Hot Finished EN 10297-1 or EN 10210 -1 

Grade: E355 or S355 (St 52), other materials on request 

Delivery condition: Cold drawn stress-relieved (BK+S). 

Hot finished as rolled (AR) or normalised (+ N )

Finish: Random lengths  Cut lengths

Ends: Capped

Tolerances ID: H8, ISO 286 Part 2 for cold finished, 

H8-H11, ISO 286 Part 2 for hot finished

Outside diameter: 25 to 280 mm for cold finished 

25 to 660 mm for hot finished 

Inner diameter: 20 to 600 mm 

Interior finish: Roller burnished or honed 

Surface Finish Ra max. 0.25 μm for cold finished 

Ra max. 0.5 μm for hot finished 

Certification: 3.1 according to EN 10204, others upon request

Seamless Cold Precision Steel Tubes for Piston Tube Applications (HPK) 

Delivery Terms: EN 10305-1 (former DIN 2391-2) 

Material: E355 (St 52), other materials on request 

Delivery Status:  C + (BK) cold drawn hard + SR (BK+S) cold drawn and stress-annealed 

+ N (NBK) normalised

Finish: Random lengths Cut lengths 

OD tolerances: TBA

ID Tolerances: TBA

Outside diameter: 35 to 140 mm 

Wall thickness: 3.5 to 15 mm 

Certification: 3.1 according to EN 10204, others upon request

Hard Chrome Piston Tubes (HPK) 

Specification: EN 10305-1 (former DIN 2391-2) 

Grade: E355 (St 52), other materials on request 

Delivery Condition:´ 

C + (BK) cold drawn hard 

+ SR (BKS) cold drawn and stress-annealed 

+ N (NBK) annealed normal 

Finish: Random lengths  Cut lengths

Tolerances OD: f7 -ISO 286 Part 2 

Outside diameter: 35 to 140 mm 

Wall thickness: 3.5 to 15.0 mm 

Surface: hard chrome 

Chrome layer thickness: 20 μm minimum 

Roughness: Ra max. 0.2 μm

 Micro hardness of chromium: min. 850 HV 0,1 min. 72 h NSS R 10

Test conditions: ISO 9227 

Evaluation: ISO 10289 

Certification 3.1 according to EN 10204, others on request

Hard Chrome Bars for Piston Rod Applications 

Grades: 20MnV6, Ck45 (C45E) AISI 329 Stainless AISI 630 Stainless Further materials upon request 

Finish: Random lengths  Cut lengths 

Tolerances OD: 8 to 16 mm -ISO f8; 18 to 160 mm = ISO f7

Surface: Hard chrome OD / 8 to 18 mm, 14 μm min

Chrome thickness: 20 to 160 mm 20 μm min

Roughness: Ra max. 0.2 μm

Micro hardness of chromium: min. 850 HV 0,1 

Corrosion resistance min. 72 h NSS rating 10. 

Min 216 hours NSS rating 9

OD 18 to 120 mm 

Certification:  3.1 according to EN 10204, others upon request

Typical Applications: 

Hydraulic and pneumatic cylinders for mining, agricultural and farm machinery, hoists, automotive and transport lifting equipment, waste disposal transport, food processing equipment, mechanical tools and equipment, compressors and earth moving equipment etc.