Aluminum Certified Reference Material WA5005 User Manual

1. ఉత్పత్తి ముగిసిందిview

The Arconic Aluminum Certified Reference Material (CRM) WA5005 is a high-quality wrought alloy reference material specifically designed for spectrochemical analysis. Produced by Arconic Spectrochemical Reference Materials, a leader in the field for over 70 years, this CRM is essential for calibration, drift correction, quality assurance, and method validation in Spark-AES instrumentation used to verify the composition of aluminum and aluminum alloys.

This particular CRM, identified with the 'WA' prefix, is a range CRM, typically used for establishing calibration curves by bracketing the composition range of one or more elements in the alloy of interest. It is a circular disk with a size of 2.5 inches (64mm) in diameter and 1 inch (25mm) in height.

Figure 1: Arconic Aluminum Certified Reference Material WA5005. This image shows the top view of the aluminum disk, clearly displaying the "SPECTROCHEMICAL REFERENCE MATERIALS" and "ARCONIC" logos engraved on its surface, along with a stylized cube graphic.

2 కీ ఫీచర్లు

• Designated with a "W" prefix, indicating a wrought alloy certified reference material with a modified composition suitable for calibration range applications.
• Physical dimensions: 2.5 inches (64mm) diameter x 1 inch (25mm) circular disk.
• Provides NIST traceable certified concentrations for up to 31 elements, with concentrations ranging from parts per million (ppm) to percent levels.
• Undergoes extensive statistical analysis to ensure the homogeneity and accuracy of final concentration values.
• Each product is stenciled with its catalog number, product lot, and section number for easy identification and traceability.

3. Usage Guidelines and Application Notes

This section provides detailed guidelines for the proper use and handling of Arconic Certified Reference Materials, particularly in the context of Spark-AES (Atomic Emission Spectrometry) applications.

Figure 2: Spark-AES Application Notes. This image displays a document detailing the application notes for Arconic Certified Reference Materials, covering topics such as CRM/RM definition, intended use, sample preparation, and certification details.

3.1. CRM/RM Definition

Aluminum discs are generally 64 mm (2.5 inches) in diameter by 25 mm (1 inch) high. In a few cases, the height may vary depending on the particular alloy or available calibration standard. Certified Reference Materials (CRMs) and Reference Materials (RMs) are available as millings or chips for use in chemical methods of analysis requiring dissolution. Arconic CRMs and RMs are produced by proprietary casting techniques that minimize or substantially eliminate both macro and micro segregations. Metallurgical structure is controlled to match chill cast disks and therefore produce the same spectral response when used according to the methods cited. All CRMs and RMs are labeled and stenciled to show the catalog number, product lot, and section number.

3.2 ఉద్దేశించిన ఉపయోగం

Arconic CRMs and RMs are intended for use with Spark-AES instruments for analysis of chill cast disks as described in American Society for Testing and Materials (ASTM) methods E716 and E1251. Because of the effects of macro and micro segregation and metallurgical structure on spectral response, metal in any form other than chill cast discs (ingot, billet, sheet, plate, extrusion, forging, castings, etc.) should be remelted and cast in disk form, as described in ASTM B985, prior to comparison to alloy CRMs. CRMs may be used for calibration, type standardization, control standards, and method validation for Spark-AES instruments. RMs, typically designated as "SO", are intended for drift correction of Spark-AES instruments. The CRMs may also be used for calibration, control, and method validation for other methods, including but not limited to classical wet chemical approaches, ICP-AES, ICP-MS, GD-AES, GD-MS, and XRF.

3.3. Instructions for Use - Spark-AES

The surface of the disc should be prepared using a lathe or milling machine. Carbide or diamond tipped tool bits are recommended. Avoid use of tool bits that may contaminate the surface with elements of interest. Do not grind or sand. If using a machining lubricant such as alcohol, make sure that it is of sufficient purity to avoid contamination of the surface with elements of interest. The surface roughness should be less than 0.0016 mm (65 microinches) RMS. Do not touch the prepared analysis surface or allow the surface to come into contact with any source of contamination. Spark should be placed, without overlapping, around the circumference of the standard close to the outer edge. Avoid the area within 12 mm (0.5 inch) of the center of the circumference because of the slight chance that radial segregation may occur. This zone should also be avoided when collecting machine turnings or chips for chemical analysis that involves dissolution.

The CRMs and RMs are certified using a Spark-AES spectrometer with a spark circumference of approximately 12 mm (0.5 inch) and ICP-AES results based on sample sizes that are greater than or equal to 0.1 g. Spark diameters or subsample sizes less than those used during the certification may invalidate the use of the certified value.

3.4. నిర్వహణ మరియు నిల్వ

For best results, the CRM/RM should be stored in a cool, dry place free from corrosive fumes. Exposure to temperatures above approximately 200°C (392°F) may cause metallurgical changes that will invalidate the certificate of analysis.

3.5. Shelf Life

The certification is valid indefinitely, within the measurement uncertainty specified, provided the CRM is handled and stored in accordance with the instructions given in this certificate (see "Instructions for Use"). Periodic recertification of this CRM is not required. The certification is nullified if the CRM is damaged, contaminated, or otherwise modified.

3.6. Material Certification

Compositions are determined using two or more independent analytical methods which may include Spark-AES, ICP-AES, XRF, GD-MS, ICP-MS or other approaches deemed appropriate for a specific application. All standard ingots are evaluated for uniformity both within and among sections by extensive Spark-AES testing. Spectral response is determined by comparison with Arconic master standards. Rigorous statistical analysis is used to ensure the accuracy of the final composition certification, the chemical and physical uniformity, and the performance of the standards in use. Values contained within parentheses, e.g., (0.05), are provided for reference only and are not certified for use as calibrants, standards, or analytical performance checks.

3.7. Limits of Uncertainty

The certified values shown are generally weighted mean values from the analysis of representative samples, using at least two independent analytical methods. The given limits of uncertainty represent a combined uncertainty and seek to estimate, with a 95% confidence level, a range in which the true value may be expected to lie. While the homogeneity of the ingot and the mean values given in the certified data sheet and International Uniformity statistical techniques, the cited uncertainties represent not only this statistical treatment but also estimates of bias based on extensive historical data and technical judgment. The uncertainties cited represent an expanded uncertainty given by U=kU_c where U_c represents the combined standard uncertainty and k is a coverage factor chosen to provide a desired level of confidence. For more information, see and reference an estimate of a 95% confidence level. The use of this expression is consistent with guidelines given in the International Organization for Standardization (ISO) document "Guide to the Expression of Uncertainty in Measurement" and National Institute of Standards and Technology (NIST) Technical Note 1297 "Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement Results". In some cases no uncertainty is given because of limited data or the lack of a second independent measure.

No uncertainties are provided for estimated compositions, i.e., parenthetic numbers.

3.8. గుర్తించదగినది

CRMs are prepared and certified for the analyses of aluminum alloys using methodology similar to that described in ASTM methods E716 and E1251. All certifications are produced using at least two independent methods and detailed statistical analysis to assure homogeneity. Traceability to NIST is maintained through the use of NIST Standard Reference Materials® (SRM) or certified reference materials directly traceable to NIST SRMs. NIST traceable weights are used for the calibration and verification of balances in both CRM production and analytical certification methods. Balances used during production and analyses are calibrated with and traceable to NIST standard weight sets.

4. సాంకేతిక లక్షణాలు

4.1. Typical Analysis - Weight Percent

The following table provides the typical elemental composition by weight percent for various aluminum alloys, including the 5xxx series, which this CRM is part of. This data is crucial for understanding the certified concentrations and for comparative analysis.

Figure 3: Typical Analysis - Weight Percent for Wrought Alloys. This image displays a detailed table showing the typical elemental composition (e.g., Si, Fe, Cu, Mn, Mg, Cr, Ni, Zn, Ti, Ag, B, Be, Bi, Ca, Cd, Co, Ga, Li, Na, Pb, Sb, Sc, Sn, Sr, V, Zr) for various aluminum alloys, including the 5xxx series, which is relevant to the WA5005 CRM.

Note: The 'X' shown as part of the typical analysis concentration is used as a decimal place holder. Actual certified values are reported to the number of digits shown if possible, with a numerical value in place of the 'X'. Actual certified values may vary both above and below those indicated and may have more or less significant figures. Values given as less than, denoted by '<', indicate that those elements are typically below this value. No intentional addition is made for these elements, however, these elements will be certified to the actual composition observed.

5. Certification and Quality Assurance

Arconic Spectrochemical Reference Materials holds accreditations for the following ISO standards: Guide 34:2009, 17025:2005, and 9001:2008. These accreditations underscore Arconic's commitment to producing CRMs and RMs of the highest quality, ensuring their uniformity and accuracy of certification.

All products are stenciled to show catalog number, product lot and section number, ensuring full traceability and identification.