ASTM-A › Zinc Coating (Hot-Dip), Assembled Steel Products. ASTM-A – EDITION – SUPERSEDED — See the following: ASTM-. in Specifications A and A This ASTM Standards A47/ A47M 1 This specification is under the jurisdiction of ASTM Committee A05 on. ASTM AAM Standard Specification for Zinc – Standard A and A shall be done using the metric equivalent of the test.
In this case, the minimum number of specimens from each lot shall be as follows: This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? The requirements for malleable iron castings to be galvanized shall be as stated in Speci?
In the case of orders in inch-pound units, the measured value shall be converted to coating grade units by the use of Table 2. Purchasers desiring a guarantee of heavier coatings than the minimum thicknesses shown herein should use the special requirements see 4.
Otherwise, the test specimens shall be selected at random from each lot. For more information on the ASTM designation system see our related article: The adhesion shall be considered inadequate if the coating?
If a zinc alloy is used as the primary feed to the galvanizing bath, then the base material used to make that alloy shall conform to Speci?
Terminology A contains other terms and de? Articles Dynamic Strain Aging of Steels: Within seconds it is also possible for you to find related detailed material property data or search equivalent materials starting from the Total Materia standard list. NOTE 6—The requirements for the? In the case of orders in SI a38, the values in Table 1, shall be applicable as metric units in micrometres.
Lumps, projections, globules, or heavy deposits of zinc which will interfere with the intended use of the material will not be permitted. In such case, the now-smaller lot shall be treated as a new lot for purposes of inspection and acceptance. If the lot size is such that the sample size cannot be doubled, then the sample size shall be as previous, but the number of widely dispersed sites at which measurements were made shall x386 doubled, and these sites will constitute the new sample.
Consultation between the designer, fabricator, and galvanizer at appropriate stages in the design and fabrication process will reduce future problems. To get started, click on the standard list button in the menu bar. NOTE 1—Each specimen comprises nominally one third of the total surface area of the article. For test by the purchaser after delivery, the lot consists of asfm single order or the single delivery load, whichever is the smaller, unless the lot identity, established in accordance with the above, is maintained and clearly indicated in the shipment by the galvanizer.
The average of the? Likewise, do not use removal of small particles of the coating by paring or whittling to determine failure. 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.
Minimum average thickness of coating for any individual specimen is one coating grade less than that required in Table 1. This standard has been approved for use by agencies of the Department of Defense. While most coating thicknesses will be in excess of those values, some materials in each category may be less reactive for example, because of chemistry or surface condition than other materials of the steel category spectrum.
The elements can be added to the galvanizing bath as part of a pre-alloyed zinc feed, or they can be added to the bath by the galvanizer using a master feed alloy. Part Two Medium Manganese Steels: Search Knowledge Base Enter a phrase to search for: Within the text of this speci?
ASTM AAM Standard Specification for Zinc_百度文库
It is the responsibility of the purchaser to heat treat or otherwise allow for the possibility of such embrittling phenomena. Do not use testing carried out at edges or corners points of lowest coating adhesion to determine adhesion of the coating.
Except for local excess coating thickness which would interfere with the use q386 the product, or make it dangerous to handle edge tears or spikesrejection for nonuniform coating shall be made only for plainly visible excess coating not related to design factors such as holes, joints, or special drainage problems see Note 6. These designations often apply to specific products, for example A is applicable to cold-heading quality carbon steel wire for tapping or sheet metal screws.
Enter a phrase to search for: The accuracy of both methods will be in? Practice A provides guidance on steel selection and discusses the effects of various elements in steel compositions for xstm, siliconthat in? For thickness testing purposes, articles whose surface area is greater a3866 in.
DataPLUS, a new module providing corrosion data, material joining information, material dimensions and tolerances and coatings information helps drive even more accurate material selections! NOTE 7—Items which are prepared for galvanizing by abrasive cleaning will generally develop a thicker coating with a moderately rougher surface.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Current edition approved October 10, NOTE 2—The presence in steels and weld metal, in certain percentages, of some elements such as silicon, carbon, and phosphorus tends to accelerate the growth of the zinc-iron alloy layer so that the coating may have a matte?
The sample consists of one or more test articles. ASTM specifications represent a consensus among producers, specifiers, fabricators, and users of steel mill products. For thickness testing purposes, the entire surface area of each unit of product constitutes a specimen. Dynamic Strain Aging of Steels: The thickness of coating thus obtained is the test article coating thickness, or in the case of a specimen removed from a test article, is the specimen average coating thickness.
Inspection, Rejection, and Retest 9. Such a plan is contained in Test Method B which addresses sampling procedures for the inspection of electrodeposited metallic coatings and related?
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