HARD CHROME PLATED PISTON ROD/BAR

Hard Chrome Plated Piston Rods/Bars

Metric Size	Dia 25mm to 250mm
Standard Lengths	3000mm to 10000mm Long
Surface Hardness	>HV-900-1150
Surface smoothness	Ra 0.2 Microns or Better
Surface Finish	Surface shall be free of dent or Scratches
Roundness	Out of Roundness is max 1/3 of Diameter tolerance
Chrome Thickness	25 Microns Min.
Tolerance	ISO f7, f8
Circularity	According to ISO f7, f8
Straightness	0.1/1000
Corrosion Resistance	Rating 10 Achieved after 120 hrs in neutral salt spray
Packing	Wrap in Plastic Tape & Individual put in hard cardboard sleeves. Wooden packing also available on request

Chemical Analysis For CK45

C (%)	Si (%)	Mn (%)	P (%)	S (%)
0.42 – 0.50	0.40 max	0.50 – 0.80	0.035 Max	0.035 Max

Mechanical Properties

Yield Stress Re (N/mm2)	Tensile Strenght Rm (n/mm2)	Elongation A (%)
350	600	> 20%

Induction hardened Hard chrome Plated Rods / Bars

Metric Size	Dia 20mm to 300mm, Our Stock CK45
Standard Lengths	3000mm to 8000mm
Surface Hardness	58-62 HRC
Roughness	Ra 0.07/0.20mµ
	Ry (Rmax):
Chrome Plating	950 to 1150 Hv 65 to 72 HRC
Chrome Thickness	Dia
Induction Harding Depth	Dia 18 < ɸ Dia 40 < ɸ Dia 80 < ɸ
Tolerance	ISO F7, F8
Circularity	< ¼ of the f7, f8, f9 Tolerance
Straightness	Max 0.2mm/m
Corrosion Resistance	Rating 9 Achieved after 126 Hrs in neutral salt spray
Packing	In packing used cardboard tube individually and bundled

Chemical Analysis For CK45

C (%) 0.42/0.50	Si (%) < 0.40	S (%) < 0.035	Mn (%) 0.50/0.80
P (%) < 0.035	Cr (%) < 0.40	M o (%) < 0.10	N i (%) < 0.40

Mechanical Properties

Range	Yield Stress Re (n/mm2)	Tensile Strength Rm (n/mm2)	Elongation A (%)
18 < ɸ < 40	> 400	630-780	> 18
40 < ɸ < 125	> 350	600-750	> 19

Chromed Deposit Characteristics

JMHSPL have the most modern plant where state-of-the-art technology is used. The process employed by us produced deposits, which are harder, smother, brighter and more durable. These deposits exhibit superior performance characteristics in term of Corrosion Resistance and Water resistance compared to deposits plated out of conventional Hard Chromium Processes. The Chromium Plating technology employed by us produces deposits with Microcrack Density (See Photo) greater than 1000 microcracks per liner inch. The actual magnified photographs of the deposits are shown. With higher Microcrack Density, The cracks are shorter and shallower, which provides superior protection to the subtracts under corrosive conditions. This holds more relevance in Hydraulic and other outdoor Applications, which are exposed to corrosive atmospheres during operation.

The Chromium oxide content in the deposit is high, which results in higher hardness of the deposit compared to conventional deposits. The hardness of the chromium deposit is greater than 900 HV (67 HRC). High oil retention in the lubricated application provides lower friction, resulting in low wear of the sliding components.