What is EN GJL 250 material?
Grey Iron EN-GJL-250, or grey cast iron, is a type of cast iron that has a graphite microstructure. It is named after the grey colour of the fracture it forms, which is due to the presence of graphite. It is the most common cast iron and the most widely used cast material based on weight.
What is GG20 material?
EN-GJL-200 is a low grade of grey cast iron according to Germany standard DIN EN 1561, it can also be written as EN-JL1030, 0.6020 or GG20 according to new standard DIN 1691. This material has equal cast iron grades in other countries, such as HT200 in China, FC200 in Japan, ASTM A48 No.
Which cast iron process has higher hardness?
White cast iron is hard but brittle. It has lower silicon content and low melting point. The carbon present in the white cast iron precipitates and forms large particles that increase the hardness of the cast iron.
Which element is added to cast iron to promote the formation of graphite flakes rather than fe3c?
Sulfur in cast irons is known to favor the formation of graphite flakes. The graphite can be induced to precipitate in a spheroidal shape by removing the sulfur from the melt using a small quantity of calcium carbide.
What is GG25?
GG25 is the most commonly used cast iron alloy. This material offers a good combination of strength and abrasion resistance, but is still easy to machine and can be finished to a high standard. It is a lamellar cast iron with a predominantly pearlitic structure. Heat treatment to increase hardness is not recommended.
When was cast iron invented?
Cast iron was invented in China in the 5th century BC and poured into molds to make ploughshares and pots as well as weapons and pagodas. Although steel was more desirable, cast iron was cheaper and thus was more commonly used for implements in ancient China, while wrought iron or steel was used for weapons.
What is the chemical composition of cast iron gg25?
EN-GJL-250, CAST IRON GG25. The normal chemical composition should be C = 2.8-3.3, Si = 1.2-1.7, Mn = 0.8-1.2, P ≤ 0.15, S ≤ 0.12. Please notice, the chemical composition can not be taken as material quality inspection standard. In all standards, the chemical composition is just for reference.
What kind of cast iron is en GJL 250 used for?
EN-GJL-250 is used for cast parts for general mechanical engineering, e.g. shipbuilding, machine-tools, textile machines, electrotechnical engineering, apparatus engineering, farm machines, household machines, car engineering, pumps, turbine casings, fittings. This material data has been provided by WIAM.
When to use bs1452 grade 250 cast iron?
BS1452 Grade 250 is suited for applications where the cast iron requires good wearing characteristics and when components require a combination of strength and wear resistance superior to those of other softer cast iron grades.
Which is the highest grade of cast iron?
EN-GJL-250 is a high material grade of grey cast iron in European standard EN 1561, it is also named as cast iron GG25 in standard DIN 1691 by Germany and Austria. The followings are its equivalent grades, chemical composition, mechanical properties, and some photos of grey iron castings made by Dandong Foundry. EN-GJL-250, GG25 Equivalent Grades