My

material helper has evolved to the point where I can now get better representations of RL metals than Dwarf Fortress actually has. More importantly, it allows me to make bronze have proper values.

` [IMPACT_YIELD:602000]`

[IMPACT_FRACTURE:843500]

[IMPACT_STRAIN_AT_YIELD:899]

[COMPRESSIVE_YIELD:602000]

[COMPRESSIVE_FRACTURE:843500]

[COMPRESSIVE_STRAIN_AT_YIELD:899] 67 GPa

[TENSILE_YIELD:172000]

[TENSILE_FRACTURE:241000]

[TENSILE_STRAIN_AT_YIELD:156] 110 GPa

[TORSION_YIELD:172000]

[TORSION_FRACTURE:241000]

[TORSION_STRAIN_AT_YIELD:384]

[SHEAR_YIELD:172000]

[SHEAR_FRACTURE:241000]

[SHEAR_STRAIN_AT_YIELD:384] 44.8 GPa

[BENDING_YIELD:172000]

[BENDING_FRACTURE:241000]

[BENDING_STRAIN_AT_YIELD:156]

I got this from

this page's data on bronze's shear modulus. The bulk modulus was calculated with the equation

, where E is the young's modulus and G is the shear modulus (accounting for significant figures, of course).

Steel also has bad data, so here's steel with proper shear modulus value:

` [IMPACT_YIELD:1505000]`

[IMPACT_FRACTURE:2520000]

[IMPACT_STRAIN_AT_YIELD:940]

[COMPRESSIVE_YIELD:1505000]

[COMPRESSIVE_FRACTURE:2520000]

[COMPRESSIVE_STRAIN_AT_YIELD:940] 160

[TENSILE_YIELD:430000]

[TENSILE_FRACTURE:720000]

[TENSILE_STRAIN_AT_YIELD:225] 200

[TORSION_YIELD:430000]

[TORSION_FRACTURE:720000]

[TORSION_STRAIN_AT_YIELD:538]

[SHEAR_YIELD:430000]

[SHEAR_FRACTURE:720000]

[SHEAR_STRAIN_AT_YIELD:538] 80

[BENDING_YIELD:430000]

[BENDING_FRACTURE:720000]

[BENDING_STRAIN_AT_YIELD:215]

Steel already had bulk modulus and young's modulus known in the files, so I could easily get the shear modulus by

, where K is bulk modulus and E is young's modulus.

And bone, too!

` [IMPACT_YIELD:200000]`

[IMPACT_FRACTURE:200000]

[IMPACT_STRAIN_AT_YIELD:500]

[COMPRESSIVE_YIELD:200000]

[COMPRESSIVE_FRACTURE:200000]

[COMPRESSIVE_STRAIN_AT_YIELD:500] bulk modulus 40 GPa

[TENSILE_YIELD:115000]

[TENSILE_FRACTURE:130000]

[TENSILE_STRAIN_AT_YIELD:575] young's modulus 20 GPa

[TORSION_YIELD:115000]

[TORSION_FRACTURE:130000]

[TORSION_STRAIN_AT_YIELD:1643]

[SHEAR_YIELD:115000]

[SHEAR_FRACTURE:130000]

[SHEAR_STRAIN_AT_YIELD:1643] shear modulus 7 GPa

[BENDING_YIELD:115000]

[BENDING_FRACTURE:130000]

[BENDING_STRAIN_AT_YIELD:575]

Used game values for strength (which are all correct, upon verification) along with

this research paper's data for Poisson ratio and Young's modulus, which can be calculated to bulk modulus and shear modulus by

and

, respectively (where ν is poisson's ratio and E is Young's Modulus).

Obsidian, too:

` [IMPACT_YIELD:1000000]`

[IMPACT_FRACTURE:1000000]

[IMPACT_STRAIN_AT_YIELD:3846]

[COMPRESSIVE_YIELD:1000000]

[COMPRESSIVE_FRACTURE:1000000]

[COMPRESSIVE_STRAIN_AT_YIELD:3846] bulk modulus 26 GPa

[TENSILE_YIELD:35000]

[TENSILE_FRACTURE:35000]

[TENSILE_STRAIN_AT_YIELD:53] young's modulus 66 GPa

[TORSION_YIELD:35000]

[TORSION_FRACTURE:35000]

[TORSION_STRAIN_AT_YIELD:114]

[SHEAR_YIELD:35000]

[SHEAR_FRACTURE:35000]

[SHEAR_STRAIN_AT_YIELD:114] shear modulus 30.7 GPa

[BENDING_YIELD:35000]

[BENDING_FRACTURE:35000]

[BENDING_STRAIN_AT_YIELD:53]

Poisson ratio

0.08. Poisson ratio and shear modulus, so I am way too lazy to photoshop right now, here's a table of every equation at the bottom of this page:

https://en.wikipedia.org/wiki/P-wave_modulusAll elasticity data auto-calculated with

my material helper, but it's best to post the equations involved anyway.