What is the sound velocity of cast iron?

You may be surprised to read that there is no one value for speed of sound in steel that covers all cases. Sound can propagate as a bulk shear or shake wave, as a compression longitudinal wave, and as an extension wave in thin rods.

This speed also varies with the alloy in question.

Here are a couple of table entries for steel which list

in column 1 the relative density;

column 2, the shear wave velocity in bulk material,

column 3 the longitudinal wave velocity,

and finally col 4, the extension wave velocity in slender rods.

Speeds are given in meters per second.

Relative density may be taken as grams per cc.Steel, mild

7.85 3235 5960 5200

Steel, 347 Stainless

7.9 3100 5790 5000