Payment & Shipping Terms:
|Material:||Ductile Iron GGG40||Process:||Green Sand Casting Process|
|Machining:||CNC Machining||Surface:||Red Paint|
GGG400 Ductile Cast Iron GGG-40.3 Nodular Cast Iron Customized Casting Foundry
Product Description and Process
1. GGG400 Ductile Iron Casting GGG-40.3 Ductile Cast Iron Customized Casting Foundry
2. Production process: green sand molding, pre-coated sand molding and resin sand molding which can produce iron castings from 50 gram to 2000 kilograms
3. Machining process: CNC machine, machining center, lathe, mill machine, drill machine, etc.
4. Surface treatment process: paint coating, electrophoretic coating, electrogalvanizing coating, black oxide coating, phosphate coating, powder coating, etc.
Product Material and Uses
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, etc.
Ductile Iron Castings & Ductile Cast Iron
If cast iron is subject to a compressive load, these stress points are not particularly detrimental and flake graphite cast iron is excellent under compression. However, tensile loading above the natural tensile strength of the cast iron can cause rapid tensile failure as cracks propagate rapidly out from these stress points. The result of this is that cast iron has virtually no elongation, is a brittle material and is therefore limited in its use in tensile and shock loading applications. For years foundrymen and metallurgists tried to develop a new type of cast iron that would withstand bending and shock loading and would have the characteristics more of malleable cast iron but could be produced at the lower cost of grey cast iron. This resulted in the development of Ductile Cast Iron.
Nodular cast iron otherwise popularly known as ductile cast iron varies from the rest of the cast iron varieties with its nodular graphite spherical structures. These graphite spheres differ in their size, quantity and the arrangement pattern. The main difference is the spherical shape of these graphite molecules unlike the graphite flakes found in grey iron. Ductile iron or nodular cast iron differs in its chemical composition due to the presence of these graphite inclusions formed by the influence of magnesium, cerium and other particles. Therefore nodular cast iron or ductile iron has more tensile strength, high elasticity and toughness than any other cast iron types. Since it has a high stiffness equal to that of a cast steel, it serves as a suitable choice for the manufacturing of parts like propeller shafts.
Nodular cast iron is produced by melting the metal initially. This molten metal is then inoculated with smaller quantities of magnesium and cerium. The free carbons present in the final product form a surface of the round graphite nodules or spheres which are surrounded by ferrite. This adds to the elasticity of the metal.
2. Mechanical properties:
The mechanical properties of nodular cast iron are greatly influenced by the arrangement patterns of the graphite nodules. This determines the various grades of ductile iron offering a wide range of choice for various purposes. The various mechanical properties of nodular cast iron include toughness, tensile strength, elasticity, ductility, hardness and fatigue strength.
3. Physical properties:
The various physical properties of a nodular cast iron include density, thermal expansion, conductivity, magnetic properties, electrical properties and heat capacity. In comparison to grey iron, nodular cast iron has a very high tensile strength up to 90k psi. It is also very strong than grey iron and has good fracture resistance. It has good resistance to any pressure than grey iron.
4. Chemical composition:Nodular cast iron has a chemical composition of several elements including Carbon, Silicon, Manganese, Phosphorous, Sulfur and Magnesium. Carbon is present up to 3.8%, Silicon is up to 3.2, Magnesium up to 0.06. Manganese less than 0.5, Phosphorous less than 0.08, Sulfur less than 0.08 and copper less than 0.40%.
If you were to do a chemical analysis of ductile iron, this is what you would normally find:
Carbon 3.2 – 3.60%
Silicon 2.2 – 2.8%
Manganese 0.1 – 0.2%
Magnesium 0.03 – 0.04%
Phosphorus 0.005 – 0.04%
Sulfur 0.005 – 0.02%
Copper <= 0.40%
To improve the strength of ductile iron, additional tin or copper can be added. To improve corrosion resistance, copper, nickel, or chromium can replace anywhere from 15-30% of the iron.
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|