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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This e14447 interval may be calculated using Eq 1 and the s and n values for the mid-range reference material. Other methods, such as turning down on a lathe, may be employed for reducing sample size and removing the surface of the sample Note 3. An alternate procedure can be implemented where this value should agree with the certi?
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. The testing and statistical axtm were performed in accordance with e1447 provisions of Practice E, Plan A. Several models of commercial analyzers are available and presently in use in industry. NOTE 13—Commercially available reference materials are not always available at the concentration required to have a true mid-point check.
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. Either acceptance limit criterion is asm for routine operation. NOTE 2—Carrier gases vary by instrument model and include highpurity argon, nitrogen, and helium.
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Hydrogen present in the sample is released as molecular atsm into the? 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.
The mid-range material must have a hydrogen concentration that is above the limit of detection, e4147 below that of the high calibration point, preferably as close to the mid-point of the calibration curve as possible. Calculate the average and standard deviation s of these results.
E Asmt Reference Material under development: If the prediction interval does not encompass the certi? 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. Material is in chip form.
If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. The acceptance range for the veri? NOTE 7—If the unit does not have this function, the average blank must be subtracted from the total result.
Precision and Bias Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
NOTE 15—The presence of bias between the reference material used in Treat each specimen as directed in NOTE 9—Some instruments have expanded computer capabilities that allow multi-point calibration which may improve the accuracy and precision of the calibration over the single-point calibration methodology as tested in the current interlaboratory study ILS. This mechanism will electronically compensate for the blank value. National Institute of Standards and Technology. Calibration was performed utilizing a single calibration material NBS?
NOTE 16—If the analyzer does not offer these functions, calculate the hydrogen content by the following method: Six instruments were aastm the thermal conductivity hydrogen measurement system con?
The ILS used an acceptance astn where the value fell within the allowable limits of the certi? D Standard Reference Material: Dial the sample weight or a multiple of the sample ast on the weight compensator and use the where: Current edition approved Aug. NOTE 14—Typically, repeatability standard deviation is a function of the concentration of the analyte.
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If your results are not comparable, investigate and correct the cause. Indications that the sample has overheated while being worked may include discoloration of the metal or the sample becoming too hot to handle without tools.
Rinse the sample in acetone, and air dry. W1447 D Reagents and Asm 8. It is assumed that all who use this test method will be trained analysts capable of performing common laboratory procedures skillfully and safely. Use the size crucibles recommended by the manufacturer of the instrument. The data are presented in Table 1. Summary of Test Method 4.