0
What is the important about grain fineness number for sand casting?
Wiki User
∙ 13y ago
gfn shows the range of the sand size. as we know sand are differ in shapes and sizes. if the gfn is between 40 and 100 it can be classified as coarse and 100-220 is fine. typically for ferrous casting the gfn is 70 but it can be range between 50 to 100. it is because if the gfn is below 50 it will result poor surface quality. if the gfn above 100, its too fine and gives low permeability and might be defects occur due to the large surface area
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
Does obsidian have a large grain size or a small grain?
Neither. It has no visible grain.
What is important of effective stress in soil mechanics?
Effective Stress is the grain to grain contact of soil particles. the higher the effective stress, the stronger the soil. effective stress at a certain depth is calculated as follows: Effective stress = total stress - pore water pressure the pore water pressure is often taken as water table. pore water pressure has a negative effectice on effective stress, as it hinders grain to grain contact.
What is interlocking grain?
grain when it stays very strong and inplace
What is granites grain pattern?
Granite has a heterogeneous grain pattern or texture.
Is the universe in a grain of sand genuine?
Yes, the universe in a grain of sand is genuine.
What is permeability in sand casting?
This allows the gases and steam to escape from the mold during casting. The grain size, shape and distribution of the foundry sand, the type and quantity of bonding materials, the density to which the sand is rammed, and the percentage of moisture used for tempering the sand are important factors in regulating the degree of permeability.
What is an important grain crop for humans?
Wheat and barley are two important grain crops.
What is caratate?
The carat (abbreviation ct or Kt) is a measure of the purity of gold alloys. In the United States and Canada, the spelling karat is used, while the spelling carat is used to refer to the measure of mass for gemstones.Therefore 24-carat gold is fine (99.9 per cent Au w/w), 18-carat gold is 75 per cent gold, 12-carat gold is 50 per cent gold, and so forth.Historically, in England the carat was divisible into four grains, and the grain was divisible into four quarts.For example, a gold alloy of fineness (that is, 99.2 per cent purity) could have been described as being 23-carat, 3-grain, 1-quart gold.The carat system is increasingly being complemented or superseded by the millesimal fineness system in which the purity of precious metals is denoted by parts per thousand of pure metal in the alloy.The most common carats used for gold in bullion, jewellery making and by goldsmiths are:24 carat (millesimal fineness 999)22 carat (millesimal fineness 916)20 carat (millesimal fineness 833)18 carat (millesimal fineness 750)15 carat (millesimal fineness 625)14 carat (millesimal fineness 585)10 carat (millesimal fineness 417)9 carat (millesimal fineness 375)
What is the phone number of the Grain Valley Branch in Grain Valley?
The phone number of the Grain Valley Branch is: 816-228-4020.
What does BF mean in the lumber industry?
Birch, fine. It is a measurement (loose) of the fineness of the wood's grain. The markings are done on the smallest end (say the 2" side of a 2x4" piece of wood) and in blue pencil.
Why was it important for emperors not to neglect actors why was this more important than the grain dole?
The emperors did not neglect actors because of their performances on stage. The important grain dole is the government.
What is the most important grain crop?
wheat
What is the most important recource in the Midwest?
the most important resource in the Midwest is grain
What is the very important grain crop in Europe?
Wheat.
What does the grain number of a bullet mean?
Grain refers to the weight of the bullet when measured on a powder scale.
Where can one purchase a Nutrimill grain mill grinder?
Someone can purchase a Nutrimill grain mill grinder from a number of companies such as Amazon. Amazon has a large selection of grain mill grinders from a number of manufacturers.
What is carat gold?
The carat (abbreviation ct or Kt) is a measure of the purity of gold alloys. In the United States and Canada, the spelling karat is used, while the spelling carat is used to refer to the measure of mass for gemstones.Therefore 24-carat gold is fine (99.9 per cent Au w/w), 18-carat gold is 75 per cent gold, 12-carat gold is 50 per cent gold, and so forth.Historically, in England the carat was divisible into four grains, and the grain was divisible into four quarts.For example, a gold alloy of fineness (that is, 99.2 per cent purity) could have been described as being 23-carat, 3-grain, 1-quart gold.The carat system is increasingly being complemented or superseded by the millesimal fineness system in which the purity of precious metals is denoted by parts per thousand of pure metal in the alloy.The most common carats used for gold in bullion, jewellery making and by goldsmiths are:24 carat (millesimal fineness 999)22 carat (millesimal fineness 916)20 carat (millesimal fineness 833)18 carat (millesimal fineness 750)15 carat (millesimal fineness 625)14 carat (millesimal fineness 585)10 carat (millesimal fineness 417)9 carat (millesimal fineness 375)
