What is Ni-Hard material?
Ni-Hard is the generic name for a family of white cast irons alloyed with nickel and chromium to give high hardness and outstanding resistance to abrasion.
Can you weld Ni-Hard?
Martensitic cast iron (Ni-Hard types) and the various white irons are generally considered too crack-sensitive or brittle to be welded satisfactorily.
Is Ni-Hard magnetic?
Ni-Resist D-6 – Is non-magnetic with good mechanical properties.
Where is Ni-Hard iron used?
Ni-Hard castings are typically used in power generation, brick, asphalt, cement, concrete, rock, sand and gravel industries. Typical castings are mill or mixer liners, mixer tips and slurry pumps.
What is ASTM A536?
ASTM A536 is the American standard specification for ductile iron castings, the main material grades including: Grade 60-40-18.
What is the effect of nickel on cast irons?
What is the effect of Nickel on cast irons? Explanation: Addition of nickel in cast irons refines the grain structure, and has a graphitizing effect on cementite. Molybdenum and Vanadium are used to increase the hardness of cast irons, while Chromium stabilizes carbides. Copper improves the resistance to corrosion.
Why does cast iron crack when welded?
It is less malleable in comparison to steel or wrought iron. The heating and cooling cycles during welding cause expansion and contraction in the metal, inducing tensile stress. Cast irons do not stretch or deform when heated or stressed—instead, they crack—making them extremely difficult to weld.
Can u weld cast aluminum?
A: The short answer is that, yes, most aluminum castings are readily weldable. These are not heat-treatable but are readily weldable using 5356 filler. However, the family of 7XX. 0 aluminum-zinc (AlZn) casting alloys, also heat-treatable, are considerably more difficult to weld.
Can you pick up nickel with a magnet?
The element Nickel (Ni) is one of the few ferromagnetic metals. Ferromagnetic means they are attracted to magnets and can be magnetized themselves. Most metals aren’t magnetic with the exception of iron, nickel, cobalt, gadolinium, neodymium and samarium.
What is A395 material?
A395 material, which has the greatest ductility, has a minimum tensile strength of 60,000 psi. than grades 70-36 and 60-30 cast steel or ordinary gray iron (which has no true yield strength) and gives a high safety factor in load bearing or thermal stress situations.
Is ductile iron stronger than steel?
Strength Ductile Iron is a very strong material when compared to cast iron and comparable to cast steel . Ductile Iron has a higher yield strength than cast steel 40K vs . 30K . The strength of Ductile Iron when compared to cast iron is overwhelming .