1. Scope

Keywords

Rationale

The goal of this document is to improve the communication between providers and users of additive manufactured polymer parts in relation to the part quality to be supplied. For this purpose, quality criteria and part properties are categorised into a system of quality classes. In the additive manufacturing processes relevant for polymers, the part properties depend very heavily on the machine systems, the material and the process control used. Typically, the process control can be optimised for productivity or quality. These goals are in principle contradictory in the context of the performance of a specific machine. The property classes listed in this standard help to make clear the differences in quality. The property classes enable the user to define part specifications for manufacturing. Along with the specification of the property classes, this standard states which property classes can be achieved with typical materials. Test specimens and their arrangement in the build space are specified (The related CAD data are included with this document as positioned STL data.). The determination of the mechanical tensile properties, the dimensional accuracy and the part density with the aid of these test specimens is described to make possible the assignment to property classes for the related characteristic values. Once approved, this standard will carry the designation ISO/ASTM 52924, per the PSDO agreement between IO & ASTM.