The material type in SAP S/4HANA (selected in MM01, configured via OMS2) defines a material's properties and behavior:
* Which document types and class categories are allowed(A): Material type determines which business documents (e.g., purchase orders, production orders) can be created and which classification categories (e.g., batch, variant) apply. For example, "FERT" allows production orders, while "NLAG" (non-stock) restricts inventory documents (configured in Logistics - General > Material Master > Define Attributes of Material Types).
* Which material master screens appear and in which sequence(C): Material type controls the views available in the material master (e.g., MRP for "FERT," no Sales view for "ROH") and their order, based on Customizing (OMS2, field selection and view sequence). This tailors the interface to the material's purpose.
Plant-specific and plant-independent statuses(B) are managed via material status (Basic Data view), not material type-type defines broader attributes.Whether produced in-house or procured(D) is set by the Procurement Type (MRP 2 view), not directly by material type, though type may imply defaults (e.g., "ROH" for procurement). This is per SAP's material type definition.