by weight of carbon 1 5 or less by weight of silicon and balance of iron and inevitable impurities the alloy is superior in hardness at high temperatures pbo resistance and pbo pbso 4 resistance in addition the alloy is suitable for powder buildup welding application_number US 42829389 A description having generally described this invention a further understanding can be obtained by reference to certain specific preferred embodiments which are provided herein for purposes of illustration only and are not intended to be limiting unless otherwise specified the hardness at an ordinary temperature the hardness at a high temperature the pbo resistance the pbo pbso 4 resistance and the powder buildup characteristic were examined to evaluate the alloys of preferred embodiments and comparative examples the alloys of the preferred embodiments and comparative examples were prepared by mixing and melting the components in the compositions shown in tables 1 and 2 in the ordinary manner the results of the test concerning the preferred embodiments and comparative examples are shown in table 1 and table 2 respectively the data of the preferred embodiment alloy nos 3 5 6 16 and 17 and comparative example alloy nos 4 and 5 in the hardness test at high temperature the pbo resistance test and the pbo pbso 4 resistance test set forth in tables 1 and 2 are plotted in fig1 and 2 respectively to explain the relationship between the nickel content and the.