What is hardness in SG iron?
S.G. iron, predominantly ferritic (partly pearlitic) if stress-relieved earlier then the water-quenching after the surface-hardening results in hardness of 50-55 HRC whereas, self-quenching results in 40-45 HRC. A fully-ferritic S.G. iron responds imperfectly as martensite is formed only around the graphite nodules.
What are the grades of cast iron?
The 4 Types of Cast Iron
- #1) Gray Cast Iron. The most common type, gray cast iron features a graphite microstructure consisting of many small fractures.
- #2) White Cast Iron. While not as common as gray cast iron, white cast iron is another type worth mentioning.
- #3) Ductile Cast Iron.
- #4) Malleable Cast Iron.
What does SG iron stand for?
spheroidal graphite iron
Ductile iron, also known as ductile cast iron, nodular cast iron, spheroidal graphite iron, spheroidal graphite cast iron and SG iron, is a type of graphite-rich cast iron discovered in 1943 by Keith Millis.
Is 210 cast iron standard?
This standard was first pubIished in 1950 and subsequently revised in 1962, 1970, 1978 and 1993. The Pig Iron and Cast Iron Sectional Committee decided to revise IS 210 by merging it with IS 6331 : 1987. The production of castings in the higher grades of grey cast iron often involves special techniques.
Why is SG Iron used?
SG Iron has long been used to transport water and other liquids. Its remarkable strength to weight ratio, alongside its toughness makes SG Iron a suitable material to withstand the high operating pressures faced by pressure pipes and fittings.
What does SG Iron stand for?
Is SG Iron weldable?
Weldability of spheroidal graphite ductile cast iron was established using a cheap Ni-Fe and a high purity Ni electrode. A preheating treatment at 350 °C and an annealing treatment at 850 °C were carried out to improve mechanical properties of welded pieces.
Is 210 GREY cast iron?
The Pig Iron and Cast Iron Sectional Committee decided to revise IS 210 by merging it with IS 6331 : 1987. The higher grades of grey cast iron (that is, Grades FG 300, FG 350 and FG 400) present special difficulties for section 10 mm and thinner.
Is 210 a material specification?
IS 210 Grade FG200
| Unit | Property Name | Value |
|---|---|---|
| GPa | Elastic modulus | 92.4 |
| MPa | Tensile strength | 207 |
| g/cm³ | Density | 7.15 |
| [-] | Hardness, Brinell | 187 |
What is as 1831 for cast iron?
AS 1831 for Ductile Cast Iron. AS 1831 2007 is an Australian standard for ductile cast iron. The objective of this standard is to specify grades of ductile cast irons by mechanical properties. This Standard is identical with, and has been reproduced from ISO 1083:2004.
What is SG iron?
SG Iron is known as Spheroidal Graphite Iron, and also known as Ductile Cast Iron, Nodular Cast Iron, or Spherulitic Graphite Cast Iron. SG Iron is a type of cast iron that has been treated while molten with an element such as magnesium or cerium to induce the formation of free graphite as nodules or spherulites.
What is as 1831 2007?
AS 1831 2007 is an Australian standard for ductile cast iron. The objective of this standard is to specify grades of ductile cast irons by mechanical properties. This Standard is identical with, and has been reproduced from ISO 1083:2004.
What is directductile cast iron?
Ductile cast iron is also known as spheroidal graphite cast iron, and less commonly as nodular iron. It is a kind of cast material, iron and carbon-based, the carbon being present mainly in the form of spheroidal graphite particles.