Hi,
There are lot of tables involved ( INOB(Here you can get the link)/KSSK etc ) . Still the Mateial should be available in AUSP . Please note the OBJEK is 50 characters where as your material is 18 characters.
So try with *<Material> in the OBJEK field in AUSP. ( Ideally it should get converted from INOB )
So it is always better to use SAP FM BAPI_OBJCL_GETDETAIL as Kripa has already mentioned.
R