1. Scope

1.1 This practice is intended to be used to assign part grades across the automotive industries that use AM to produce parts, including automotive applications.
1.2 This practice is applicable to all AM technologies defined in ISO/ASTM 52900 used in automotive industries.
1.3 This practice is intended to be used to establish a metric for AM parts in downstream documents.
1.4 This practice is not intended to establish criteria for any downstream processes, but rather to establish a metric that these processes can use.
1.5 The part grade metric could be utilized by the engineering, procurement, non-destructive inspection, testing, qualification, or certification processes used for AM automotive parts.
1.6 The grade scheme in this practice establishes a consistent methodology to define and communicate the consequence of failure associated with AM automotive parts.
1.7 The material or process, or both, in general does not affect the consequence of failure of a part, therefore the grade scheme defined in this document may be used outside AM.
1.8 The user of this standard should not assume regulators’ endorsement of this standard as accepted mean of compliance.
1.9 This standard does not purport to address all the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1.10 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee

Keywords

AM; Risk; Consequence of Failure

Rationale

Part affordability is of paramount concern in the automotive industry. Part affordability is highly impacted by requirements that are been established to ensure reliable product realization. Aligning the production requirements of a part with the end use application will help to drive affordability by assigning the most stringent requirements to the parts with the highest criticality. With the passage of Specification F3554, Additive Manufacturing - Finished Part Properties - Standard Specification for Grade 4340 (UNS G43400) via Laser Beam Powder Bed Fusion for Transportation Applications, a classification methodology was established to assign part criticality for the automotive industry based on the part’s consequence of failure. Although different in some ways, this methodology was modeled after Practice 3572, Additive Manufacturing – General Principles – Part Classifications for Additive Manufactured Parts Used in Aviation. With adoption of a part classification methodology, part affordability should increase and help drive the adoption of AM in the automotive industry.

The title and scope are in draft form and are under development within this ASTM Committee.