procurement of journal head liners for roller journal assembly and scrapper assembly for coal mills of unit no.10 and 11 stps sarni. procurement of journal head liners for roller journal assembly and scrapper assembly for coal mills of unit no.10 and 11 stps sarni. , journal head liner with welding plug (i) material : aisi 5132 ( as per drawing ) , journal head liner with welding plug (ii) material : ni hard( as per drawing ) , complete scrapper assembly along with pins nuts & bolts etc. in assembled condition for coal mill xrp 903 for unit no. 10 & 11 (250mw) atstps sarni(a) scrapper mn steel (as per drawing)(b) scrapper holder cast steel (as per drawing)(c) scrapper guard mn steel (as per drawing)(d) scrapper guard bracket cast steel(as per drawing)mn steel :-c - 0.3 to 0.4 %mn - 1.6 to 0.9%p - 0.05% max.s - 0.05% max.hardness – 140 to 240 bhncast steel:-c - 0.2 to 0.35%mn - 0.6 to 0.9%si- 0.05 to 0.35% s - 0.06% max.hardness – 143 to 193 bhn , scrapper mn steel (as per drawing)