K--IL WATERWAY PURCHASE STEEL CASTINGS; TWO YOKE CASTNGS AND FOUR BUFFER BLOCKS.

Steel Castings shall be produced and heat treated in accordance with ASTM A 148, Grade 90-60. Nondestructive Testing. The steel castings shall be visually examined for surface cracks or discontinuities. Any substantive defects will be cause for rejection and the casting shall be replaced at the Contractor's expense. Weld documentation and material certification is required as per ASTM A148 Grade 90-60.GENERAL REQUIREMENTS: All steel castings shall be annealed before machining to remove casting process stresses. Castings that are warped or otherwise distorted or that are oversize to an extent that will interfere with proper fit with other parts of the machinery or structure will be rejected. Repairs to castings shall not be made without the knowledge and prior approval by the Contracting Officer. Excessive segregation of impurities or alloys at critical points in a casting will be cause for rejection.