According to EN 1559-1:1997 (Founding – Technical conditions of delivery - Part 1: General), the purchaser of castings is to give clear information (see also Order check list) already in the enquiry and order, namely:
Optional information When applicable, enquiries and orders should include further requirements, such as:
information on drawings, patterns and tools The purchaser must provide the manufacturer with the necessary drawings of the as-cast casting and/or the finished machined casting. The identification of the relevant drawings is to be specified in the enquiry and order (note: unless otherwise agreed and applicable, drawings, patterns and tools are to conform to international or national standards). If modifications to the purchaser’s drawings are necessary (due to casting-related measures and conditions), they must be agreed between the manufacturer and the purchaser. When applicable, the surfaces to be machined, the required machining allowances and datums (ISO 5449) for machining and for the dimensional check are to be specified on the drawings. If the purchaser makes patterns, gravity dies or tools available to the manufacturer, their identification needs to be specified in the order. The surfaces of the casting to be machined are to be clearly identified and indicated on the drawing. The manufacturer of the casting needs to check whether the pattern is usable and complete.
For general tolerances and machining allowances, ISO 8062 applies, unless agreed otherwise. The casting tolerance grade and the machining allowances are to be specified on the drawing or in the order.
information on the mass If there is a tolerance on the mass for castings, an agreement must be reached as to whether the mass of the casting is to be the same as the mass calculated from the drawing or the mass of an initial sample with sizes within the size tolerances. When the mass is calculated from the drawing, then any modifications to the mold and/or the casting process and all machining allowances must be taken into account.
EN 1559-1:1997, Founding – Technical conditions of delivery – Part 1: General
DIN EN 10204:2004, Metallic products - “Types of inspection documents”