What are the properties of ductile iron?
Ductile iron is distinguished from ordinary grey iron by its remarkable mechanical properties (elasticity, impact strength, elongation…). These are due to the spheroidal nature of the graphite particles….Ductile iron properties
- tensile strength,
- impact resistance,
- high elastic limit,
- good elongation.
What is the compressive strength of ductile iron?
ksi
An Introduction to Ductile Iron
| Property | Minimum Value (S.I.) | Units (Imp.) |
|---|---|---|
| Bulk Modulus | 119 | 106 psi |
| Compressive Strength | 229 | ksi |
| Ductility | 0.02 | NULL |
| Elastic Limit | 215 | ksi |
What is the tensile strength of ductile cast iron?
Ductile iron has a minimum tensile strength of 60,000 psi and a minimum yield strength of 40,000 psi. There are many grades of gray iron as per the ASTM A48 standard. While gray iron does not have a measurable yield strength, the range for tensile strength is 20,000 psi – 60,000 psi.
What are the mechanical properties of cast iron?
Mechanical properties of cast iron
- Hardness – material’s resistance to abrasion and indentation.
- Toughness – material’s ability to absorb energy.
- Ductility – material’s ability to deform without fracture.
- Elasticity – material’s ability to return to its original dimensions after it has been deformed.
Which factor controls the mechanical properties of ductile cast iron?
Nodularity plays a significant role in determining properties within the ductile iron family. Nodularity and the morphology of the non-spherical particles exert a strong influence on the yield and tensile strengths of ductile iron.
What is the composition of ductile iron?
Ductile Iron Composition Usually ductile iron is composed of 3.2 to 3.6% Carbon, 2.2 to 2.8% Silicon, 0.1 to 0.2% Manganese, 0.03 to 0.04% Magnesium, 0.005 to 0.04% Phosphorus, 0.005 to 0.02% Sulfur, Less than 0.4% Copper and Remaining (Around 94%) Iron.
Is cast iron brittle or ductile?
brittle
Cast iron is harder, more brittle, and less malleable than wrought iron. It cannot be bent, stretched, or hammered into shape, since its weak tensile strength means that it will fracture before it bends or distorts.
Why is ductile iron ductile?
In gray cast iron these are easily concentrated and generate break points (brittleness), whereas in ductile or nodular cast iron they do not accumulate with the same density. This makes the material able to withstand great stresses and deformations before breaking: this is what “ductile” means.
Why is ductile iron better than cast iron?
Ductile iron is less brittle than other cast iron, even before heat treatment. It does not fracture as easily with impact. Being ductile allows the iron to bend. In comparison, gray cast iron is harder.
Is ductile iron strong?
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.
What is ductile iron vs cast iron?
The difference between traditional cast iron and modern-day ductile iron is the shape of the graphite. While cast iron has small flakes of graphite, ductile iron contains spherical graphite nodules. Because of the spherical shape of the graphite, ductile iron is often called spheroidal iron or nodular cast iron.
What is difference between ductile iron and cast iron?
Is iron ductile?
Ductile iron—also referred to as spheroidal or nodular iron—is actually a group of irons that exhibit high strength, flexibility, durability, and elasticity due to their unique microstructure. Cast ductile iron normally contains over 3 percent carbon; it can be bent, twisted, or deformed without fracturing.
What is the chemistry of a 65-45-12 grade ductile iron?
Ductile iron 65-45-12 is one grade in a family of many. Chemistry requirements are not specified in the ASTM A536 standard. Chemistry and hardness listed in this spec would be typical for a Grade 65-45-12. Ductile Iron impact properties are microstructure dependent.
Most ductile irons are specified based on mechanical properties and have loosely defined compositions. For example, 65-45-12 ductile iron is specified to have a minimum tensile strength of 65 ksi (448 MPa), a yield strength of 45 ksi (310 MPa) and an elongation of 12%. Mostly ferritic, as cast or annealed.
What is ASTM A536 grade 65-45-12?
ASTM A536 65-45-12 is a nodular Iron with a ferritic and pearlitic microstructure and mechanical properties comparable to low alloy steels. Ductile iron 65-45-12 is one grade in a family of many. Chemistry requirements are not specified in the ASTM A536 standard. Chemistry and hardness listed in this spec would be typical for a Grade 65-45-12.
What is ASTM grade 65-45-12 cast iron?
ASTM grade 65-45-12 is ductile cast iron in the as-fabricated (no temper or treatment) condition. 65-45-12 is the ASTM designation for this material. 450-10 is the ISO numeric designation. D4512 is the SAE designation. Additionally, the UNS number is F33100.