Wear Resistant Irons are also referred to as High Chrome Alloys, Abrasion Resistant Irons, White Irons and Ni hard. This family of materials has been developed for a variety of applications were abrasion is evident.
irons are generally specified for applications requiring a hardness range of 200 / 300 HBN, High Chrome Alloys (typically 28% Cr addition) are specified for applications requiring HBN figures of 600 – 650 HBN and Ni Hard castings are supplied in a range of grades that offer a hardness range of between 500 – 600 HBN
With post casting heat treatments the hardness range of High Chrome Alloys can be extended to 700HBN.
All of the wear resistant materials available have alloy additions to varying degrees. Chrome is the main element but copper, molybdenum and vanadium can be introduced to the base Grey Iron material.
All of the Wear Resistant Cast materials present challenges when it comes to machining. Careful use of steel inserts and ceramic tooling and know how allows us to undertake the supply of fully machined castings. We product deferent kind and size of Hammer crusher (Ni hard /high Manganese)
Gray Iron has been the most widely used form of Cast Iron over many decades; however it still has an important part to play in today’s engineering environment. Gray or Cast Iron is also known as Flake Graphite Iron. A micro structure of this material reveals that the graphite is in the form of flakes that run through the ferrite / pearlite matrix. This graphite structure offers very little ductility but the many benefits that this material has to offer are:-
Cost Gray Cast Iron is the cheapest of the Cast Iron range to manufacture.
Fluidity Although this material has a low melting temperature it retains a high degree of fluidity in the molten condition. This allows complex Gray Cast Iron casting shapes to be manufactured with thin wall sections.
Wear Properties As a result of the material structure Gray Cast Iron has excellent wear characteristics.
Machinability Gray Cast iron is a superb material to machine. Although there are many forms of Gray Cast Iron all will machine very easily. With the addition of various alloys the mechanical properties can be enhanced but the hardness figure on the highest grade will be below 275HBN.
Excellent Bearing Properties The graphite within structure of Gray Cast Iron provides excellent lubrication properties.
Excellent Bearing Properties Compressive Strengthray Cast Iron has compressive strength comparable to low and medium Carbon Steel
Ductile Iron is also known as ductile iron, Nodular Cast Iron, SG Iron, Spheroidal Graphite Iron and Spherulitic Cast Iron. The main characteristic of this material is the structure of the graphite. In Ductile iron the graphite is in the form of spherical nodules (hence the name Spheroidal Graphite) rather than flakes as in Grey Cast Iron. This nodular graphite structure inhibits the creation of linear cracks hence the ability to withstand distortion. As with Grey Cast Iron, there are many grades of SG Iron- Ductile Iron that can be specified offering the engineers varying degrees of tensile strength and elongation. The various grades are achieved through a combination of alloy additions and heat treatment. This material offers the following benefits:-
Cost When compared against steel castings SG Iron-Ductile Iron has a lower manufacturing cost.
Cast ability SG Iron-Ductile Iron has a lower casting temperature than steel and this allows for a superior surface finish and the ability to cast complex shapes incorporating changes of section.
Ductility Some grades of SG Iron-Ductile Iron offer elongation figures in excess of 20%.
Machining SG Iron-Ductile Iron is very easily machined and machining allowances are able to be kept to a minimum.
Tensile Strength Grades of SG Iron-Ductile Iron offer tensile strengths of up to 900N/mm2.
Weight ReductionSG Iron-Ductile Iron castings will weigh significantly lighter than the equivalent steel casting due to density, less machining allowance and the ability to cast to shape
An alloy is a mixture of metals melted together to produce another metal with distinct characteristics different from the metals from which it is madeWhat is Copper Alloye?
A copper alloy is an alloy of primarily copper, mixed with different alloying elements that give rise to an entire range of materials, each of which is designed to maximize a particular characteristic such as strength, ductility, formability, machine ability, or electrical conductivity. These alloys are grouped into "families", the names of which have become familiar - coppers, brasses, bronzes, copper-nickels, and nickel-silvers.
Coppers are made from copper with trace elements
Brasses are made from copper alloyed primarily with zinc
Bronzes are made from copper alloyed primarily with tin
Copper-Nickels are made from copper alloyed primarily with nickel and manganese
Nickel Silvers Are made from copper alloyed primarily with nickel and zinc
"Cast" means the metal was melted and poured into its final shape - faucets, knobs, handles, grates, sculptures, etc.