What is the grade of ductile iron?
What is the grade of ductile iron?
Ductile Iron Grade Comparison
| Grade | Tensile Strength (psi) | Elongation |
|---|---|---|
| 80-55-06 > | 80,000 | 6 |
| 80-55-06X > | 80,000 | 6 |
| 100-70-03 > | 100,000 | 3 |
| 60-40-18 > | 60,000 | 18 |
Which is better cast iron or ductile iron?
Ductile iron has excellent corrosion resistance, tensile strength, and yield strength. Unlike cast iron, ductile iron does not break when it is bent, so it is more suited for high demand applications. Ductile iron is typically more expensive than cast iron due to its more complicated chemical makeup.
What is a ductile material?
Ductility is the ability of a material to be drawn or plastically deformed without fracture. It is therefore an indication of how ‘soft’ or malleable the material is.
What is the hardness of ductile iron?
Ductile Iron Properties
| (65-45-12) | (80-55-06) | |
|---|---|---|
| Tensile Strength | 65,000 psi | 80,000 psi |
| Yield Strength | 45,000 psi | 55,000 psi |
| Elongation, % | 12% | 6% |
| Brinell Hardness Range | 131/220 | 187/269 |
How hard is 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.
Why is it called ductile iron?
In ductile irons, graphite is in the form of nodules rather than flakes as in grey iron. Whereas sharp graphite flakes create stress concentration points within the metal matrix, rounded nodules inhibit the creation of cracks, thus providing the enhanced ductility that gives the alloy its name.
What is the unique property of cast iron?
Cast Iron is a metal bearing high strength in compression but weak in tension. It is hard and brittle. So, it cannot be forged.
How do you identify ductile iron?
Ductile iron can be identified in a laboratory setting by using a spectrograph to examine its exact composition, or by using a tensile test.
- Examine the pipe.
- Look for markings on the face of the bell flange.
- Look for markings on the outside of the pipe.
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. Ductile iron also has what is called excellent wear resistance because of the graphite in the iron.
How can you tell the difference between ductile iron and cast iron?
Ductile iron pipe is lighter, stronger, and more durable than cast iron. The difference between cast iron and ductile iron is the graphite form. In ductile iron, the graphite form is spheroidal, or nodular; in cast iron, it is in a flake form.
What is the tensile strength of 65-45-12 ductile iron?
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.
Which is the normal grade of ductile iron?
ASTM A536 Grade 65-45-12 is a normal material grade of ductile iron. It is USA grade, also equal to ISO Grade 450-10, China QT450-10, Germany GGG50, Euro EN-GJS-450-10, UK 420/12, Australia Grade 500-7.
What kind of graphite is in 65-45-12 ductile iron?
65-45-12 Ductile Ironcontains nodular graphite in a matrix of ferrite with small amounts of pearlite. The ferritic structure gives excellent machinability with good surface finishes along with optimal impact strengths, fatigue properties, electrical conductivity and high magnetic permeability.
What should the temperature be on a 65-45 ductile iron bar?
Heat Treat Response 65-45-12 Ductile Iron can be oil quench hardened from 1600° F (885° C) to Rockwell C 50 minimum on the outside of the bar. Hardness in the core will be less than the hardness on the outside surfaces. This grade also responds well to surface hardening methods such as flame or induction heat treating.
