Approximate bulk modulus (K) for common materials Material     Bulk modulus in GPa     Bulk modulus in psi
Glass (see also diagram below table)     35 to 55     5.8×106
Steel     160     23×106
Diamond[1]     442     64×106
Influences of selected glass component additions on the bulk modulus of a specific base glass.[2]

Approximate bulk modulus (K) for other substances Water     2.2×109 Pa (value increases at higher pressures)
Air     1.42×105 Pa (adiabatic bulk modulus)
Air     1.01×105 Pa (constant temperature bulk modulus)
Solid helium     5×107 Pa (approximate)