AASHTO M 111M M 111-2015 Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products.pdf
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1、 Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products AASHTO Designation: M 111M/M 111-15 ASTM Designation: A123/A123M-13 American Association of State Highway and Transportation Officials 444 North Capitol Street N.W., Suite 249 Washington, D.C. 20001 TS-4h M 111
2、M/M 111-1 AASHTO Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products AASHTO Designation: M 111M/M 111-15 ASTM Designation: A123/A123M-13 1. SCOPE 1.1. This specification covers the requirements for zinc coating (galvanizing) by the hot-dip process on iron and ste
3、el products made from rolled, pressed and forged shapes, castings, plates, bars, and strips. 1.2. This specification covers both unfabricated products and fabricated products, for example, assembled steel products, structural steel fabrications, large tubes already bent or welded before galvanizing,
4、 and wire work fabricated from uncoated steel wire. This specification also covers steel forgings and iron castings incorporated into pieces fabricated before galvanizing or which are too large to be centrifuged (or otherwise handled to remove excess galvanizing bath metal). Note 1This specification
5、 covers those products previously addressed in M 111-80, ASTM A123-78, and ASTM A386-78. 1.3. This specification does not apply to wire, pipe, tube, or steel sheet that is galvanized on specialized or continuous lines, or to steel less than 0.76 mm 22 gauge (0.0299 in.) thick. 1.4. The galvanizing o
6、f hardware items that are to be centrifuged or otherwise handled to remove excess zinc (such as bolts and similar threaded fasteners; castings; and rolled, pressed, and forged items) shall be in accordance with M 232M/M 232. 1.5. Fabricated reinforcing steel bar assemblies are covered by the present
7、 specification. The galvanizing of separate reinforcing steel bars shall be in accordance with ASTM A767/A767M. 1.6. This specification is applicable to orders in either SI units (as M 111M) or inch-pound units (as M 111). SI units and inch-pound units are not necessarily exact equivalents. Within t
8、he text of this specification and where appropriate, inch-pound units are shown in brackets. Each system shall be used independently of the other without combining values in any way. In the case of orders in SI units, all testing and inspection shall be done using the metric equivalent of the test o
9、r inspection method as appropriate. In the case of orders in SI units, such shall be stated to the galvanizer when the order is placed. 2. REFERENCED DOCUMENTS 2.1. AASHTO Standards: M 232M/M 232, Zinc Coating (Hot-Dip) on Iron and Steel Hardware T 65M/T 65, Mass Weight of Coating on Iron and Steel
10、Articles with Zinc or Zinc-Alloy Coatings 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-4h M 111M/M 111-2 AASHTO 2.2. ASTM Standards: A47/A47M, Standard Specification for Ferritic Malleable Iron Cas
11、tings A143/A143M, Standard Practice for Safeguarding Against Embrittlement of Hot-Dip Galvanized Structural Steel Products and Procedure for Detecting Embrittlement A384/A384M, Standard Practice for Safeguarding Against Warpage and Distortion During Hot-Dip Galvanizing of Steel Assemblies A385/A385M
12、, Standard Practice for Providing High-Quality Zinc Coatings (Hot-Dip) A767/A767M, Standard Specification for Zinc-Coated (Galvanized) Steel Bars for Concrete Reinforcement A780/A780M, Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings A902, Standard Terminolog
13、y Relating to Metallic Coated Steel Products B6, Standard Specification for Zinc B487, Standard Test Method for Measurement of Metal and Oxide Coating Thickness by Microscopical Examination of Cross Section B602, Standard Test Method for Attribute Sampling of Metallic and Inorganic Coatings B960, St
14、andard Specification for Prime Western Grade-Recycled (PWG-R) Zinc E376, Standard Practice for Measuring Coating Thickness by Magnetic-Field or Eddy-Current (Electromagnetic) Testing Methods 3. TERMINOLOGY 3.1. Definitions: 3.1.1. The following terms and definitions are specific to this specificatio
15、n. ASTM A902 contains other terms and definitions relating to metallic-coated steel products. 3.2. Definitions of Terms Specific to This Standard: 3.2.1. average coating thickness, nthe average of three specimen coating thicknesses. 3.2.2. black, adjdenotes the condition of not galvanized or otherwi
16、se coated. For purposes of this specification, the word “black” does not refer to the color or condition of surface, or to a surface deposit or contamination. 3.2.3. coating thickness grade, nthe numerical value from Table 1 at the intersection of a material category and a thickness range. Table 1Mi
17、nimum Average Coating Thickness Grade by Product Category Product Category All Specimens Tested, Steel Thickness Range (Measured), in. mm 3/16to 4.8 to 100 000 mm2160 in.2YesSubdivide Each TestArticle into ThreeSpecimensOne Specimenper Test ArticleTest Each Specimenfor Compliance withSection 6.1YesE
18、ach SpecimenAvg. Complieswith Section 6.1NoNoLot Fails forThicknessLot Passesfor ThicknessYesAvg. of AllSpecimenComplies withSection 6.1 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-4h M 111M/M 111
19、-8 AASHTO 6.1.2. For articles with surface area equal to or less than 100 000 mm2160 in.2 (single-specimen articles), the average of all test articles in the sample must meet the appropriate minimum average coating thickness grade requirements of Table 1, and for each test article, its specimen coat
20、ing thickness shall be not less than one coating grade below that required in Table 1. 6.1.3. No individual measurement, or cluster of measurements at the same general location, on a test specimen shall be cause for rejection under the coating thickness requirements of this specification provided th
21、at when those measurements are averaged with the other dispersed measurements to determine the specimen coating thickness grade for that specimen, the requirements of Sections 6.1.1 or 6.1.2, as appropriate, are met. Note 4The coating thickness grades in Table 1 represent the minimum value obtainabl
22、e with a high level of confidence for the ranges typically found in each material category. 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 stee
23、l category spectrum. Therefore, some articles may have a coating grade at or close to the minimum requirement shown in Table 1. In such cases, the precision and accuracy of the coating thickness measuring technique should be taken into consideration when rejecting such articles for coating thickness
24、 below that required by this specification. Purchasers desiring a guarantee of heavier coatings than the minimum thicknesses shown herein should use the special requirements (Section 4.1.6) to specify coating thickness grades higher than those shown in Table 1. In addition, the purchaser should anti
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