Weights: Iron vs Steel vs Ceramic

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Discussion Overview

The discussion centers around the comparative weights of cast iron, stainless steel, and ceramic brake discs, specifically focusing on predictions of weight based on material density and disc dimensions. Participants explore theoretical calculations and seek estimates for the weights of stainless steel and ceramic discs relative to a known cast iron disc weight.

Discussion Character

  • Exploratory, Technical explanation, Homework-related, Mathematical reasoning

Main Points Raised

  • One participant provides the average density of stainless steel as approximately 0.28 Lbm/in³.
  • Another participant requests predictions for the weight of a stainless steel disc of the same diameter (0.3m) as a cast iron disc weighing 4kg.
  • A suggestion is made to calculate the volume of the steel and ceramic discs and then multiply by their respective densities to find their weights.
  • Participants express a need for estimates rather than exact figures, indicating uncertainty in available data for steel and ceramic discs.

Areas of Agreement / Disagreement

Participants generally agree on the approach of using density and volume for weight calculations, but there is no consensus on the specific weights of the stainless steel and ceramic discs, as these values remain uncertain and uncalculated.

Contextual Notes

Limitations include the lack of specific density values for the ceramic material and the need for assumptions regarding the dimensions of the steel and ceramic discs.

heiroglif
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I have weighed a cast iron brake disc and got an average reading of roughly 4kg, id like to know how a stainless steel disc would compare with this weight (just roughly) and also, if a ceramic plate was added to the iron disc...any help appreciated...thanks!

H
 
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The average density of most stainless steels is around .28 Lbm/in3
 
..

hi, thanks for your reply,

im just looking for some predictions in kg,

if a cast iron disc with diameter 0.3m weighs 4kg, then how would a stainless steel disc of the same size match up to that?

also how much extra weight would a ceramic plate added to the cast iron disc give?

i took the weight of the iron disc, can't find a steel and ceramic disc, so anyhelp would be great...

thanks
 
Work out how much volume the steel and ceramic discs would be, multiply each of those values by its density, and you have the weight of the disc.
 
^i see, ok great! thanks
 

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