EB SPEC 2678Q Page 21 of 28 Appendix C
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These tests are designed for simple screening and identification of materials by alloy family (as opposed to classification of specific alloys within a family). Government Representative - In cases where MIL-I-45208 or MIL-Q-9858 specifies the “Government Representative” or in cases where documents such as MIL-STD-271 or NAVSEA Technical Publication-271 or MIL-STD-2132 specifies the “Government Inspector” the Supplier shall interpret that to include the issuer of the purchase order (i.e. the Purchaser). Heat Number - The numeric or alpha/numeric designator assigned to material, produced in a common batch or under a continuous pour process, by the activity that produces the material. Homogeneous Lot - A group of like items that are produced in a common heat or batch, or are produced under a continuous cast or pour process with the same vendor’s traceability numbers, are of the same nominal size, and are received in a single shipment. For batch or continuous cast/pour processes, samples for chemical and mechanical properties shall be taken no less than once in every eight hours of operation. If additional production processes are utilized that alter the mechanical properties of the material (e.g., heat treat, cold or hot forge, extrusion), then all items of the same "heat number" and additionally processed under the same conditions at the same time shall be considered as a homogeneous lot. Identification - The ability to show the required characteristics of a material. Level I (NAVSUP Level I) – Level I designation is given to components for which the Navy requires a maximum degree of assurance that the chemical composition and mechanical properties of the installed material meets the specified requirements. Lot Number - The numeric or alpha/numeric designator assigned to material when a process (i.e., heat treatment, hot forged, extrusion, etc.) alters the original mill source mechanical properties of the material. The lot definition may be further defined by the material specification. Material Lots - Material lots are comprised of a number of associated items grouped collectively and sharing a common reference. For material requiring traceability, lots are referenced to one of the following: - Inspection Lot - Items that are grouped together for inspection. - Production Lot - Items that are grouped together by production process. - Shipping Lot - Items that are grouped together for transporting. Mechanical Properties - The properties of a material that influence its elastic or inelastic behavior when force is applied, thereby indicating its suitability for mechanical applications (e.g., tensile strength, yield strength, elongation, hardness, etc.). Objective Quality Evidence (OQE) - Quantitative and qualitative data of all mechanical, chemical, and performance tests performed (as required by the applicable specification, drawing, or purchase document) to prove that material supplied conforms to the specified requirements. OQE is also verification that the action identified has been performed in accordance with purchase order requirements and the results are as recorded. Official Record- Records that substantiate conformance to contractual requirements, including data entered into automated systems. Physical Segregation – Segregation that is required to be accomplished by use of separate cages, racks, bins, shelves, boxes, bags, roped off areas or other physical device/barrier. Procurement Document (Purchase Order) - A written agreement for the procurement of supplies or services that describes what is to be supplied and what requirements are to be met. This document takes precedence over all other documents; written, implied, or specified. Public Key Infrastructure (PKI) - A set of roles, policies, hardware, software and procedures needed to create, manage, distribute, use, store and revoke digital certificates and manage public-key encryption.
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