Calculation of AFS grain fineness number 16 Recommended standard colours for patterns 17 Dust control in foundries 18 Buoyancy forces on cores 18 ... The calculation of feeder dimensions 257 Determination of feeding requirements 262 Steel, malleable …
It should be noted that while average grain Total Product 3990.26 GFN = = = 40.01 size and AFS grain fineness number are useful parameters, Total %Sand Retained 99.72 choice of sand should be based on particle size distribution, as the size distribution affects the quality and properties of casting produced.
The sifter is designed to hold up to 11 standard half-height, 8-inch or 200mm diameter sieves. The Sand Testing Sieves, Model No. 42106A are purchased separately. A sieve analysis is used to check sand particle size and distribution and to calculate the AFS grain fineness number and surface area.
AFS grain fineness number. CALCULATION OF AFS GRAIN FINENESS NUMBER Multiplier Weight in (A) 10 20 30 50 70 100 140 200 300 Weight in Cum Wt in gm Us Sieve Aperture No. 12 20 30 50 70 100 140 200 270 Pan 7) .10) (mm) 3.327 1.651 0.833 0.589 0.414 0.295 0.208 0.147 0.104 0.074
Dec 15, 2014· Grain Fineness Number (AFS GFN, Calculation)—AFS 11-6-00-S. The purpose of the sieve anaylsis test is to determine the particle size distribution and estimate the average sieve size of green sand using standard testing sieves. Calculating the grain fineness number gives an estimate of the average sieve size of a sand sample.
the sieves (Ref 2). Table 1 lists the series of sieves used to run the standard AFS standard sieve analysis. A typical calculation of the AFS fineness number, which includes the …
Feb 08, 2019· Fineness modulus of sand (fine aggregate) is an index number which represents the mean size of the particles in sand. It is calculated by performing sieve analysis with standard sieves. The cumulative percentage retained on each sieve is added and subtracted by 100 gives the value of fineness modulus. This calculator calculates the grain ...
The number of significant places retained- in the rounded off value should be the same as that of the specified value in this standard. 1. SCOPE 1.1 This standard prescribes the methods of tests evaluate their properties under standard conditions. SECTION I GENERAL 2. TERMINOLOGY for foundry sands to
The relevance of the grain fineness number can be ascribed to the fact that this values is proportional with the number of grains per unit of weight and with the specific surface area of the sand. For approximate calculation of the AFS grain fineness number, the value of the theoretic specific surface area is multiplied by the factor 0.57.
The AFS Grain Fineness Number is a way of measuring the average size of the particles in a sand sample. The fineness of a sand system can have an effect on casting finish and permeability of the sand. Loss on Ignition. LOI determines the total amount of combustible and organic material in the sand. The quantity of gas-forming material in the ...
properties of a 63 afs fineness number sand The principal properties (green strength, permeability, and dry strength) of a 63 AFS Fineness sand are shown in figures 58 and 59. This graphical method of presenting the information is used so that the interrelation of the various properties can be easily seen.
Oct 01, 2001· Background: The AFS Grain Fineness Number (AFS GFN) is a measure of the average size of particles in a sand sample. AFS GFN is important because it provides the foundry a way to verify that its sand is within specification for the castings being produced and helps avoid conditions that could lead to potential casting problems.
The Sand Testing Sieves are used with the Laboratory Sifter, Model No. 42106 for determining the AFS grain fineness number and for the distribution of molding and core sands. Included are a nest of AFS sand testing sieves consisting of U.S.A. sieve numbers 6, 12, 20, 30, 40, 50, 70, 100, 140, 200, 270 and a …
Jul 12, 2021· Excel Sheet For Sieve Analysis Of Aggregate And To Calculate Fineness Modulus. A sieve analysis (or gradation test) is a practice or procedure used (commonly used in civil engineering) to assess the particle size distribution (also called gradation) of a granular material. The size distribution is often of critical importance to the way the ...
Jan 01, 2000· The 212 and 150 sieves are also optional, but may be included to give better separation between the 250 and 125 sieves. Tables and general data 15 Calculation of average grain size The adoption of the ISO metric sieves means that the old AFS grain fineness number …
Foundry sands usually have a size distribution from 0,1 mm – 0,8 mm with a mean size between 0,2 mm and 0,45 mm. A standard parameter to express the size of molding sands is the AFS fineness number (AFS = American Foundry Society). This number is calculated from the size distribution, which is determined by standard ASTM sieves.
Jul 15, 2021· ③. Calculate the percentage of the amount of sand particles remaining on each sieve to the total amount of sand samples; ④. Multiply the percentage of the amount of sand particles remaining on each sieve by the "AFS fineness multiplier" corresponding to each sieve; ⑤. Add the above products for each sieve number to find the sum: ⑥.
Two tests will be performed in this module: the AFS 1105-12-S: Sieve Analysis (Particle Determination of Sand) and the AFS 1106-12-S: Grain Fineness Number, AFS GFN, Calculation tests. Topics that will be covered: purpose of the tests, basic variables that factor into the tests, and performing the tests in a virtual environment.
Mar 25, 2017· CALCULATION OF AFS GRAIN FINENESS NUMBER Using either the old BS sieves or AFS sieves, follow 1-4 above. 5) Arrange the results. 6) Multiply each percentage weight by the preceding sieve mesh number. 9. 7) Divide by the total of the percentage to give the AFS grain fineness number.
AFS Grain Fineness Number 60.0 60.0 AFS Clay AFS Clay indicates the amount of fines and water-absorbing material in the sample. Procedure - A known amount of dried molding sand mixed with a pyrophosphate solution is stirred with a high-speed mixer for 5 min. Water is added to the top level line, and the mixture is allowed ...
AFS 1106-12-S:1994*, "Grain Fineness Number, AFS GFN, Calculation" ISO 13503-2:2006*/API RP19C:2008, Section 11, "Proppant Crush-Resistance Test" ASTM C146 – 94a, Acid Demand Value and Paste pH, Metals by Fusion and XRF (SGS Labs)
AGS and AFS Average Grain Size (AGS) and American Foundrymans Society Average Fineness Number (AFS) These values are calculated from the results obtained in Particle Size Analysis (Section 3.2) and give a rapid indication of the average size of the sand particles.
Foundry e-Learning from the AFS Institute Designed by foundry curriculum experts, each skills-based AFS Institute e-Learning Module takes from 15 to 60 minutes to complete. Each module costs $50 for members or $100 for non-members. For a free demo, contact Renee Berrigan at [email protected] or Jen Christian at [email protected]
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The Fineness Modulus is an index number that indicates the mean size of the sand particle. It is calculated by the sieve analysis test with standard IS sieves. The fineness modulus of sand ranges from 2.2 to 3.2. The formula for its calculation is, Fineness modulus of Sand = …
Dec 17, 2019· This video Demonstrates how, Grain Fineness is calculated using an Automated machine VAFS (Make : Versatile)In the Video we have used an ISO3310-1 & ASTME11 ...
The AFS grain fineness number of sand is approximately the number of openings per inch of a given sieve that would just pass the sample if its grains were of uniform size, that is, the weighted average of ...
