Payment & Shipping Terms:
|Material:||ASTM A536 Grade 65-45-12||Process:||Green Sand Casting Process|
|Machining:||CNC Machining||Surface:||Shot Blasting|
|Used For:||Industry Machinery||Packing:||Plywood Crate|
nodular cast iron,
spheroidal cast iron
Ductile Iron Castings Process Manufacturer OEM&ODM Industry Castings Supplier
Product Description and Process
1. Ductile Iron Castings Process Manufacturer OEM&ODM Industry Castings Supplier
2. Production process:
green sand castings process,
pre-coated sand castings process,
resin sand castings process
3. Raw Castings weight range: from 50 gram to 2000 kilograms
4. Raw Castings dimension tolerance: CT8-CT11 rest with different molding terms
5. Sand moulds making: by handwork, by Z145/Z146/Z148/Z149 molding machine, by shell molding machine, by automatic molding production line
6. Machining process: CNC machine, machining center, lathe, mill machine, drill machine, etc.
7. Surface treatment process: paint coating, electrophoretic coating, electrogalvanizing coating, black oxide coating, phosphate coating, powder coating, etc.
Cast Iron Products Material and Use:
1. Normally produce with gray iron HT200, HT250, ductile iron 65-45-12, 60-40-18, 80-55-06, 80-60-03, etc.
2. The ductile iron casting products are widely used for Auto-cars, trains, trucks, vehicle components, mining machinery components, agricultural machinery parts, textile machinery parts, construction machinery parts, valves and pump parts, etc.
Ductile Iron Casting Production Process
Ductile iron casting refers to a process in which some alloy will be added to cast iron.
While most varieties of cast iron are comparatively brittle, ductile iron castings are much more ductile due to the inclusion of nodular graphite. Solidified castings of ductile iron contain nearly perfect spheres of graphite.
Composition of Ductile Iron Castings
Cast or grey iron is an alloy characterized by its relatively high content of carbon flakes (2% to 4%). In contrast, the carbon in ductile iron is in the form of spherical nodules. The formation of such nodules is achieved by the addition of nodulizer like magnesium or cerium into the castings melt. Due to its inherent properties, such nodules resist the creation of cracks and augment its ductility. That is why this process is called as ductile iron casting. In the as-cast condition, the matrix will consist of varying proportions of pearlite and ferrite, and as the amount of pearlite increases, the strength and hardness of the iron also increase. Ductility and impact properties are principally determined by the proportions of ferrite and pearlite in the matrix.
The mechanical properties of ductile iron are controlled by the presence of graphite nodules. The Different grades of Ductile Iron Castings are produced by obtaining different matrix microstructures in the Iron. Alloying elements may be added to enhance as cast properties of Ductile Iron. In some special cases Heat Treatment can be employed to achieve the higher properties. The Grades of Ductile Iron Castings are based on the Mechanical Properties of the casting.
What are the Benefits of Ductile Iron?
Ductile iron castings are very strong compared to regular cast iron (gray iron). The tensile strength of cast iron is 20,000 – 60,000 psi while ductile iron starts at 60,000 psi and can go to 120,000 psi. The yield strength for ductile iron is generally 40,000 – 90,000 psi but the yield strength of cast iron is so low it is considered not measurable.
Let us put strength in a different way. We have seen gray iron parts break when they hit the ground after falling ten feet. With a ductile iron casting, you can hit the part all day long with an eight-pound sledge hammer and it is not likely to crack.
What causes the problem for gray iron is those graphite flakes which encourage fractures along the flakes, while the nodules in ductile iron work at keeping the iron together. Given the exact same scenario of the same part made from the two different metals, while the brittle gray iron wants to crack, the ductile iron wants to bend.
Ductile iron also has what is called excellent wear resistance because of the graphite in the iron. When you have something rubbing against ductile iron, the ductile iron wears away much slower than many other metals. The wear resistance is partly from the graphite structures that can act like a dry lubricant on the iron.
Ductile iron also dissipates (gets rid of) heat very well and can be machined fairly easily, though ductile iron is harder to work with than regular gray cast iron. Ductile cast iron dampens vibration and sound much better than steel would making ductile iron a good match for use on large machines.
Ductile Iron Grade Chart
ASTM A536 1993 (USA)
Common Ductile Iron Grades
While there are many different ductile iron specifications, foundries routinely offer 3 common grades;
|Physical and Mechanical Properties||ASTM A536, Grade 60-40-18||ASTM A536, Grade 65-45-12||ASTM A536, Grade 80-55-06|
|Tensile Strength, min, psi||60,000||65,000||80,000|
|Tensile Strength, min, MPa||414||448||552|
|Yield Strength, min, psi||40,000||45,000||55,000|
|Yield Strength, min, MPa||276||310||379|
|Elongation in 2 in. or 50 mm, min %||18||12||6|
|Melting Temperature (Degrees F)||2,100 – 2,190||2,100 – 2,190||2,100 – 2,190|
|Melting Temperature (Degrees C)||1,150 - 1,200||1,150 - 1,200||1,150 - 1,200|
|Compressive Strength Ksi||429||429||429|
|Compressive Strength MPa||2960||2960||2960|
Contact Person: Mr. James Wang
Tel: +86 13213152686