Welcome to OzBrakez Plus

Your search for  hi- tech alloy brake rotors has ended! You’ve found the place where they are made, here in Australia, by Australians who have a passion for quality and results. What’s more, we’re sending them overseas with amazing results.

OzBrakez manufactures premium high tech automotive disc brake rotors.

Our disc brake rotors are suitable for a range of driving demands from high performance vehicles, emergency services, motor racing and heavy-duty applications.

Hi Tech Alloy Disc Brakes

Reduces Stopping Distance: our disc rotors have an improved co-efficient of friction (‘bite’), with a measured value of 25% improvement over standard conventional disc rotors. A recognised brake test authority rated the Hi Tech Alloy rotor at 8.5 out of 10, whereas OE disc rotors rated 5 or 6 out of 10. This is achieved by the unique composition of the material, which delivers the most important aspect of braking safety; STOPPING.

No Evidence of Fade: the fine metal matrix dissipates heat much more readily than conventional cast irons, allowing the disc rotors to run much cooler over sustained braking thereby eliminating brake fade. This has been supported by law enforcement authorities in the US with letters of recommendation.

Longer Lasting: the essential elements of Hi Tech Alloy are formed from Carbon, Molybdenum and Vanadium. These three elements are extremely strong, and when combined, gives this material good wear characteristics. Tested by local taxis who have confirmed their longer life.

Cooler Operation: the disc rotor runs cooler than conventional cast iron because of its ability to transfer heat rapidly through the fine matrix, allowing for rapid dissipation of unwanted heat, this will leave the brakes cool and make for safer operation. Proven on racetracks throughout Australia, including the demanding 3-Hour Bathurst Showroom Showdown.

No Shudder or Pulsation: the Hi Tech Alloy composition is a very stable material with less than 5 microns of runout, compared with standard cast iron disc rotors at 30 microns of runout. This material has no phase changes from hot to cold, and therefore no volumetric change.

Minimal Black Dust: our testing has proven that the fine grain structure of Hi Tech Alloy reduces black brake deposits on a vehicles wheels. Conventional cast iron disc rotors have a flake graphite structure, which is the main source of black dust.

Manufactured 33% Lighter: as the Hi Tech Alloy material is of high strength, this allows a 35% reduction in mass. This reduction of material does not affect the overall manufacturers dimensioning, but delivers a lighter product. Using an OE disc rotor weighing 9kg, we were able to reduce the weight to 6kg and achieve improved braking performance. In the case of the HSV hi-performance 330mm disc rotor, we are 1kg lighter than a comparative brand.

Better Handling: this is a combination of two points, reduced stopping distance and reduced weight. With a lighter wheel assembly, steering is easier, while a lighter rotating mass has less gyroscopic effect, resulting in the precise operation of the vehicle.

Less Suspension Stress: the suspension has to ride out the bumps. Take away the unwanted
backlash and it is easy to see how springs and shock absorbers can control a lighter brake
assembly, ensuring the impacts of the road are not transferred to the steering system.

Lower Fuel Consumption: It takes more effort to move a heavy object, so by reducing unsprung weight, combined with a lower co-efficient of drag made possible by the smooth surface, we have increased overall efficiency and reduced fuel consumption as well.

Cryogenic Treated Cast Iron Discs

Claimed Benefits
Gray cast iron brake disc rotors are treated cryogenically with the view that this treatment will provide a better wearing disc, be more stable, and reduce the residual stress in the casting. The claim is that the treatment is a one off situation, and has many benefits including no dimensional change.

The process costs approximately $15.00AUD per disc to process, however it is still a grey iron disc with a flake graphite structure, therefore contains no tensile and elongation qualities. This additional cost in most cases makes the grey cast iron disc more expensive than a Hi Tech Alloy disc.

Hi Tech Alloy Disc Rotors
The Hi Tech disc rotor is a carefully engineered disc rotor using exotic alloys. This material is an alloy ductile cast iron with special features;

Low DTV of 5 microns, it has no phase change hot to cold and vice versa, therefore no distortion, shudder or pulsating, and has a minimum 7% elongation and a tensile rating of 580 Mpa, which gives the disc rotor a high degree of strength and therefore provides a much safer disc. These discs will not heat crack as cast iron does, while the disc runs much cooler than conventional discs due to the matrix of the material.

The discs are also used on NASCAR motorsport applications, the improved performance and weight saving already contributing to race victories. For Law Enforcement agencies that use the disc rotor, they find that in pursuit situations that there is no brake fade, even after long hard braking. This has been proven in testing in Florida, North Carolina and South Carolina.

Ductile Iron Production

Special cast irons like Hi Tech Alloy, differ from the common cast ductile irons mainly in the higher content of alloying elements, which promote microstructures with special properties for elevated temperature applications, wear resistance and corrosion resistance.
The goal of the metallurgist is to design a process that will produce a structure that will yield the expected mechanical properties. This requires knowledge of the structure-properties correlation for the Hi Tech Alloy under consideration, as well as of the factors affecting the structure.
When discussing the metallurgy of ductile iron, the main factors of influence on the structure that need to be addressed are;

• Chemical composition.
• Cooling rate.
• Liquid treatment.
• In the original cooling of the metal, a matrix can be internally decarbonised or carburised by depositing graphite on existing sites or by dissolving carbon from them.
• Depending on the silicon content and the cooling rate, the ferrite in iron can vary in carbon content. This is a ternary system.
• The critical temperature of ductile iron is influenced by silicon content, not by carbon content.
• To prevent excessive shrinkage, high chilling tendency, graphite flotation or a high impact transition temperature, optimum amounts of good quality recarburiser and silicon must be selected.
The liquid treatment of ductile iron is more complex than other irons. The two stages for the liquid treatment of ductile iron are;
• Modification, which consists of magnesium treatment of the melt, with the purpose of changing graphite shape from flake to spheroidal.
• Inoculation, usually post inoculation to increase nodule count. Increasing the nodule count is an important goal, because a higher nodule count is associated with less chilling tendency and a higher as-cast ferrite structure.