Table 1: Compositional Limits % (m/m) of Elements in the Main Alloys Used in Orthopaedic Prostheses (British Standard Metallic Materials for Surgical Implants http://bsonline.bsi-global.com) [14]

Group C Si Mn P S N Cr Co Mo Ni Cu Fe Ti H O Al V W Be Nb Ta
ISO 5832-1 Wrought stainless steel 0.03 1.0 2.0 0.025 0.01 0.1 17-19 - 2.25-3.5 13-15 0.5 Bal - - - - - - - - -
ISO 5832-2 Unalloyed titanium 0.03 - - - - 0.012 - - - - - 0.1 Bal 0.0125 0.1 - - - - - -
ISO 5832-3 Wrought Ti 6-Al-4 V alloy 0.08 - - - - 0.05 - - - - - 0.3 Bal .015 0.2 5.5-6.75 3.5-4.5 - - - -
ISO 5832-4 Co-Cr-Mo casting alloy 0.35 1.0 1.0 - - - 26.5-30 Bal 4.5-7.0 1.0 - 1.0 - - - - - - - - -
ISO 5832-5 Co-Cr-W-Ni alloy 0.15 1.0 2.0 - - - 19-21 Bal - 9-11 - 3.0 - - - - - 14-16 - - -
ISO 5832-6 Wrought Co-Ni-Cr-Mo alloy 0.025 0.15 0.15 0.015 0.01 - 19-21 Bal 9-10.5 33-37 -- 1.0 1.0 - - - - - - - -
ISO 5832-7 Co-Cr-Ni-Mo-Fe alloy 0.15 1 1-2.5 0.015 0.015 - 18.5-21.5 39-42 6.5-8.0 14-18 - Bal 0.5-3.5 - - - - - 0.001 - -
ISO 5832-8 Wrought Co-Ni-Cr-Mo-T-Fe alloy 0.05 0.5 1.0 - 0.01 - 18-22 Bal 3-4.0 15-25 - 4-6.0 - - - - - 3-4.0 - - -
ISO 5832-9 High nitrogen stainless steel 0.08 0.075 2-4.25 0.025 0.01 0.25-0.5 19.5-22 - 2-3.0 9-11 0.25 Bal - - - - - - - 0.25-0.8 -
ISO 5832-10 Wrought Ti 5-Al, 2,5 Fe alloy 0.08 - - - - 0.05 - - - - 2-3.0 Bal 0.015 0.2 4.5-5.5 4.5-5.5 - - - -
ISO 5832-11 Wrought Ti 6- Al, 7-Nb alloy 0.08 - - - - 0.05 - - - 0.25 Bal 0.009 0.2 5.5-6.5 - - - 6.5-7.5 0.5
ISO 5832-12 Wrought Co-Cr-Mo alloy 0.35 1 1 - - 0.25 26-30 Bal 5-7 1 - 0.75 - - - - - - - -

Carbon (C), Silicon (Si), Manganese (Mn), Phosphorus (P), Sulfur (S), Nitrogen (N), Chromium (Cr), Cobalt (Co), Molybdenum (Mo), Nickel (Ni), Copper (Cu), Iron (Fe), Titanium (Ti), Hydrogen (H), Oxygen (O), Aluminum (Al), Vanadium (V), Tungsten (W), Beryllium (Be), Niobium (Nb), Tantalum (Ta), Balance (Bal).