Induction hardening is a form of heat treatment in which the chrome plated steel bar is heated by induction heating and then quenched. This heat treatment is increasing the hardness and brittleness of the chrome plated bars.

Induction Hardened Chrome plated steel bars are used as piston rods for hydraulic cylinders in applications operating in standard and demanding conditions.

Our customers use Induction Hardened Chrome plated steel bars to produce pneumatic cylinders that work at pressures higher than 200 bars.

Applications for standard conditions are defined as applications working in a non-particular corrosive environment. Applications for demanding conditions are used in heavy duty and corrosive environment.
We recommend these chrome plated steel bars made from C45E+IH steel for most standard piston rods.

Diameter Tolerance Standard is ISO-f7. We can provide special tolerance at a premium price.

Residual Magnetism Standard is Max. 50 Gauss. We can provide special magnetism at premium price.

Roundness – max ½ from the diameter tolerance.

Surface roughness: Ra0.2μm ~ Ra0.4μm (8 Ra – 16 Ra)

Surface Hardness Chrome Layer hardness is a minimum of 850 HV 0,1. Steel-grade C45E IH surface hardness is from 50~60HRC.

Straightness for ∅<20 [mm] is max 0,3 [mm]/1000 [mm] and for ∅≥20[mm] is max 0,2[mm]/1000[mm].

Chrome Layer thickness for ∅≤19.05 [mm] is minimum 15[µm] and for ∅>20[mm] is minimum 20[µm].

Corrosion Resistance is given by the salt spray test results. These tests are following the ISO 9227 and ISO 10289 standards. The results of these tests are giving the rating of our products.

Induction Hardened Depth, Hardness Depth 1.6-3.5 mm

Chemical Properties of C45E

Steel Grade C Si Mn P S Cr Mo Ni
C45E 0.42 Max 0.5 Max Max Max Max Max
0.50 0.4 0.8 0.03 0.035 0.4 0.1 0.4

Mechanical Properties of C45E

Diameter Tensile Strength Yield Point Elongation Hardness Brinell
Steel Grade mm Rm(N/mm2) Rp0.2(N/mm2) A5% HB
C45E Up 16 Min 710 Min500 Min 6 200
16~19.05 Min 650 Min 410 Min 7 200
20~100 Min 580 Min 305 Min 16 180~225
100~200 Min 560 Min 275 Min 16 180~225

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