Professional manufacturer of Hard chrome rod for hydraulic, founded in 2004, major in honed tube, hydraulic tube, chrome rod, chrome bar, chrome shaft, at present we are biggest manufacturer and wholesaler in north of China.
Induction hardened hard chrome bar
Material: CK45, ST52, 20MnV6, 42CrMo4, 40Cr, stainless steel, alloy steel and special steel.
Delivery Condition: Chrome plated + Induction hardened
Chrome Thickness: 20 to 50 micron
Surface Roughness: 0.2-0.4um
Outside Diameter Tolerances：ISO f7
Ovality：Half of the tolerance ISO f7
Corrosion Resistance：Test in natural salt spray according to ASTM B 117-72hours
Results evaluation according to ISO 4540 RATING 7-10
Packing：Antirust oil spread on rod surface and each rod was packed in paper tube and then in wooden cases or bundled by plastic film and cotton rope.
Certificate：All certificate related with material heat treatment and plating is required.
We are one of biggest manufacturer in China. Raw material is mainly from famous refinery steel mills, such as BAO STEEL, Tianjin, and Chengdu etc., which are the best and largest raw material manufacturers in China. we have been passed ISO9001:2000 international quality system certification.
We own 35 sets honing machines producing tube ID from 38.1mm to 1000mm, at max length of 18m. We also have skiving & burnishing machine (made in Italy and Korea), which can make tube ID max 530mm.
We own 18 sets of equipment for piston rod in completely production, producing OD from 12mm to 500mm, at max length of 16m. Plate according to customers’ different requirements such as Chrome, Nickel, and Ceramic. Thickness is from 10μm to 100μm.
Honed tube (Roughness as 0.2μm and straightness ≤ 1/1000mm).
Piston rod (Chrome thickness is 10-50 micron. Roughness as 0.2μm and straightness ≤ 0.15/1000).
Product details are completely meet international Standard, chrome rod and honed tube must be cut flatly.
Long Warranty Period
Warranty period for our honed tubes and chrome bars is 2 years. For some special or important requirement, the period is 5 years. All the orders, records of production and inspection would be kept for 5 years.
The average delivery time is 5-30 days after order confirmed.
Output for honed tubes is about 300tons per month and 200tons for chrome bars per month.
our packages are safer than others’ supplier in China. Packing for rod normally we choose is cardboard that film attached inside, which does not only prevent rods from scratch but also from oil rusting. Tubes are sealed by caps at both end and painted oil on inside and outside surface.
For full container, extra package like parcel at outside will be using.
Raw material – Peeling – Straightening – Heat treatment – Cutting – Grinding 3 times – Straightening – Grinding 2 times – Polishing Ra0.2 – Chrome plating – Polishing Ra0.2 – Finished products