Hi Kiran,
We are integrating material master data and other master data like POrg, PGroups, Comany Codes, payment terms, Inco Terms etc...
Material Number will be a new field for a line item.
Integration will create OA - Value or Quantity and you can select them in the UI before integrating.
You can find more information @ https://connect.ariba.com/AC_web_page/1,,164963,00.html
Let me know whether this is useful
Hari