Hard chromium-plated and induction hardened bars
Application
Hard chromium-plated and induction hardened bars are used for the manufacturing of cylinders for building machinery and guiding shafts with ball bearings.

Exact description
Hard chromium-plated induction hardened bars.

Material
CK 45, material-no. 1.1191
42 Cr Mo 4 V, material-no. 1.7225

Dimensions
Diameter: 16 - 200 mm

Tolerances
Diameter tolerance: ISO-f7, for guiding shafts with ball bearings ISO-h6
Thickness of the chromium layer
Diameter:
16 and 18 mm : 18 +/- 3 µm
20 up to 200 mm : 25 +/- 5 µm
Surface roughness
· Ra value max. 0.3 µm
· Rt value max. 2 µm
Surface hardness
660 - 750 HV
Hardening depth
Diameter 16 - 20 mm: hardening depth 1.0 +/- 0.4 mm
Diameter 22 - 40 mm: hardening depth 1.5 +/- 0.4 mm
Diameter 45 - 80 mm: hardening depth 2.0 +/- 0.5 mm
Diameter 85 -200 mm: hardening depth 2.5 +/- 0.5 mm

Hardness of chromium layer
min. 66 - 68 HRC
Lengths
Production lengths of approx. 6 meters. Upon demand supply of fixed or combinable lengths.
Test certificate
Upon demand all the bars can be supplied with an EN 10204-3.1B factory certificate.

Mechanical features
 

Material Tensile strength
(N/mm2)		 Yield Stress
(N/mm2) 		Elongation (%) Delivery state
Ck 45 600 340 17 untretaed
42 Cr Mo 4 V 950 800 12 hardened and tempered

Delivery Time
For bars with f7 tolerance about 3 weeks from the order date, delivery time for bars with h6 tolerance has to be agreed upon.


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