MARCROME® is a superior hard chrome plated steel bar renowned for its strength, smoothness, corrosion and wear resistance. MARCROME® is used primarily as piston rod material in hydraulic and pneumatic equipment operating in conditions of high stress, abrasive and corrosive environments. The powerful performance, weldability and machinability of MARCROME® is second to none – the perfect solution for piston, hydraulic and pneumatic applications. These features are synonymous with: wear resistance, corrosion resistance, superior mechanical strength, fine dimensional tolerances, and a smooth surface. These features ensure longevity and performance every time.
Milltech’s ongoing capital expenditure to upgrade its Continuous Chrome Plating process means it is now able to offer the full 19 – 160mm Ø range produced by this process.
The continuous plating process employed by Milltech represents the newest and most advanced technology in Chrome Plating.
Unlike the clamping system generally used globally, the through feed plating process is a true continuous process which together with axial rotation of the bars through the plating bath ensures perfectly concentric deposition of chrome. This eliminates the problems of ovality and the “dog bone” effect that can occur with other processes.
We are now able to offer lengths to 7.5m as standard with longer lengths available on enquiry.
Full adoption of this advanced technology will ensure Milltech Martin Bright’s ongoing role as the leader in the supply of chrome bar in Australian and international markets.
HIGH GRADE BASE METAL
|STEEL GRADE||METAL FINISHING PROCESS||YIELD STRENGTH MPa||TENSILE STRENGTH MPa||ELONGATION % (5D)||HB BRINELL HARDNESS|
|AISI 1045||Drawn or Peeled||700 470||800 670||9 20||230 200|
|AISI 1045 Induction Hardened||Turned||-||-||-||Core 200 HB Case 55-60 HRc|
|AISI 4140 Hardened and Tempered||Turned||800||930||20||280|
|AISI 4140 H&T Induction Hardened||Turned||800||950||18||Core 280 HB Case 55-60 HRc|
|Sizes (larger on enquiry)||19mm to 152.4mm||up to 7.5m|
|SURFACE ROUGHNESS||CHROME THICKNESS|
|0.1-0.3 microns Rq||<20mm Ø min 15 microns|
|>20mm Ø min 20 microns|
|up to 51||up to 2.0||+0.00,-0.025||+0.00,-0.001|
|over 51-102||over 2.0-4.0||+0.00,-0.050||+0.00,-0.002|
|over 102||over 4.0||+0.00,-0.075||+0.00,-0.003|