ɪɾ ɪz ɐ fˈɛɹli hˈɑːɹd mˈɛɾəl ðæt kæn dɪsˈɑːlv ˈoʊnli ɐ smˈɔːl kˌɑːnsəntɹˈeɪʃən ʌv hˈaɪdɹədʒən, nˈoʊmˌoːɹ ðɐn zˈiəɹoʊ.twˈɛnti dˌʌbəljˌuːtˈiː pɚsˈɛnt æt , ænd ˈoʊnli zˈiəɹoʊ.zˈiəɹoʊ tˈuː pɚsˈɛnt æt .
It is a fairly hard metal that can dissolve only a small concentration of hydrogen, no more than 0.20 wt% at , and only 0.02% at .