ASTM ER Standard Test Method for Determination of Hydrogen in Titanium and Titanium Al_材料科学_工程科技_专业资料。. ASTM E() Standard Test Method for Determination of Hydrogen in Titanium and Titanium Alloys by Inert Gas Fusion Thermal Conductivity/Infrared. Buy ASTM E TEST METHOD FOR DETERMINATION OF HYDROGEN IN TITANIUM AND TITANIUM ALLOYS BY INERT GAS.

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If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Aatm, at the address shown below. The ILS used an acceptance criterion where the value fell within the allowable limits of the certi? Reagents and Materials 8. The mid-range material must have a hydrogen concentration that is above the limit of detection, but below that of the high calibration point, preferably as close to the mid-point of the calibration curve as possible.

Weigh to 6 0. Rinse the sample in acetone, and air dry.

Satm of Apparatus Current edition approved Aug. Analyze at least three reference material specimens to determine the calibration slope Note 8. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

No other units of measurement are included in this standard. Last previous edition approved in as E — This prediction interval may be calculated using Eq 1 and the s and n values for the mid-range reference material. This cannot be corrected by making adjustments to the instrument. The data are presented in Table 1. Calculate the average and standard deviation s of these results.


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D Standard Reference Material: Use a fresh crucible each time. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

NOTE 3—Regardless of the method used, the sample must not be allowed to overheat, as this will adversely affect the results of the analysis. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.

Hydrogen present e144 the sample is released as molecular hydrogen into the? NOTE 16—If the analyzer does not offer xstm functions, calculate the hydrogen content by the following method: Either acceptance limit criterion is acceptable for routine operation.

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It is assumed that all who use this test method will be trained analysts capable of performing common laboratory procedures skillfully and safely. Treat each specimen as directed in This titanium hydrogen reference material should have a hydrogen content greater than or approximately equal to the unknown samples within the scope of this test method 0. Several models of commercial analyzers are available and presently in use in industry. The accuracy of this test method is largely dependent upon the absence of bias in the hydrogen values assigned to the reference materials and upon the homogeneity of these materials.

Results must be supported by acceptable preceding and subsequent veri? The prediction interval is de? The acceptance range for the veri? The hydrogen is separated from other liberated gases such as carbon monoxide and? NOTE 2—Carrier gases vary by instrument model and include highpurity argon, nitrogen, and helium.


A number in parentheses indicates the year of last reapproval. NOTE 14—Typically, repeatability standard deviation is a function of the concentration of the analyte. Specimens must be of an appropriate size to?

Use the size crucibles recommended by the manufacturer of the instrument. The user should determine and correct the cause, and repeat Material is in chip form. Precision and Bias An alternate procedure can be implemented where this value should agree with the certi?

Six instruments were of the thermal conductivity hydrogen measurement system con? Originally approved in Sm, there is evidence that the repeatability of the particular instrument is not acceptable for use with this test method. 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.

E Standard Reference Material under development: Calibration was performed utilizing a single calibration material NBS?

Standard Test Method f For specimens of unknown 2 If your results are not comparable, investigate and correct the cause. ASTM D In this case r1447 response must always be veri?

Summary of Test Method 4. If the prediction interval does not encompass the certi? The accuracy of this test method may be judged by comparing the results obtained from certi?