1、Standard Specification for Aluminum-Zinc Alloy Coated Sheet Steel for Corrugated Steel Pipe AASHTO Designation: M 289-91 (2012) American Association of State Highway and Transportation Officials 444 North Capitol Street N.W., Suite 249 Washington, D.C. 20001 TS-4b M 289-1 AASHTO Standard Specificati
2、on for Aluminum-Zinc Alloy Coated Sheet Steel for Corrugated Steel Pipe AASHTO Designation: M 289-91 (2012) 1. SCOPE 1.1. This specification covers sheet steel for corrugated steel pipe, which is coated with a 55 percent aluminum-zinc alloy on continuous lines by the hot-dip process. The material is
3、 furnished in coils, flat cut lengths, and corrugated cut lengths. The standard corrugations available in cut lengths (pitch by depth) are 68 by 13 mm, 75 by 25 mm, and 125 by 25 mm. Aluminum-zinc alloy coated steel sheet for corrugated pipe is produced in one coating mass only, designated as 210 g/
4、m2. 1.2. Steel sheets or coils furnished under this specification shall meet the applicable requirements of ASTM A792/A792M unless otherwise specified herein. 2. REFERENCED DOCUMENTS 2.1. AASHTO Standard: T 65M/T 65, Mass Weight of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
5、2.2. ASTM Standards: A754/A754M, Standard Test Method for Coating Weight (Mass) of Metallic Coatings on Steel by X-Ray Fluorescence A792/A792M, Standard Specification for Steel Sheet, 55% Aluminum-Zinc Alloy-Coated by the Hot-Dip Process E8/E8M, Standard Test Methods for Tension Testing of Metallic
6、Materials E376, Standard Practice for Measuring Coating Thickness by Magnetic-Field or Eddy-Current (Electromagnetic) Testing Methods 3. TERMINOLOGY 3.1. In this specification, manufacturer refers to the producer of the sheet, fabricator refers to the producer of the pipe, and purchaser refers to th
7、e purchaser of the finished product. 4. ORDERING INFORMATION 4.1. All sheet, both flat and formed, covered by this specification is ordered only to the specified thicknesses listed in Table 4. The thickness of the sheet includes both the base steel and the coating. 2015 by the American Association o
8、f State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-4b M 289-2 AASHTO 4.2. Unless otherwise specified in the purchase order, all material furnished to this specification will be chemically treated. 4.3. Orders for material to this specifi
9、cation shall include the following information, as necessary, to adequately describe the desired product: 4.3.1. Name of material (aluminum-zinc alloy coated sheet for corrugated steel pipe, or corrugated aluminum-zinc alloy coated sheet for corrugated steel pipe); 4.3.2. Description of corrugations
10、, if corrugated (Section 10); 4.3.3. Mass of aluminum-zinc alloy coating (210 g/m2) (Note 1); 4.3.4. AASHTO designation number and date of issue; 4.3.5. Dimensions: thickness, flat width (if flat) or overall corrugated width (if corrugated), and length (if cut length) (Section 10); 4.3.6. Coil size
11、requirements (specify maximum outside diameter (OD), acceptable inside diameter (ID), and maximum mass); and 4.3.7. Special requirements. 4.4. If a certification by the manufacturer is required, it shall be specified in the purchase order (Section 12). Note 1The coating mass should be shown in the o
12、rder to eliminate possible confusion with coating masses permitted by other specifications. Note 2Typical ordering descriptions are as follows: Aluminum-zinc alloy coated steel sheet for corrugated steel pipe, 68 by 13 mm corrugated, 210-g/m2coating, 1.63 by 648 by 1524 mm, in accordance with M 289-
13、_. Aluminum-zinc alloy coated steel sheet for corrugated steel pipe, 210-g/m2coating, 2.01-by-686-mm coil, 1200-mm max. OD, 600-mm ID, 5445-kg max. coil mass, in accordance with M 289-_. 5. CHEMICAL REQUIREMENTS 5.1. Cast or Heat (formerly Ladle) AnalysisThe base metal cast or heat (formerly ladle)
14、analysis shall conform to the chemical requirements of Table 1. Table 1Chemical Composition by Cast Analysis Composition, % Tolerance over the Max Limit by Product Analysis, % Carbon, max Manganese, max Phosphorus, max Sulfur, max 0.05 +0.01 Silicon, max Sum of first five elements, max 0.70 +0.04 No
15、te: Copper bearing steel availability subject to inquiry. 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-4b M 289-3 AASHTO 6. MECHANICAL REQUIREMENTS 6.1. The aluminum-zinc alloy coated sheet steel s
16、hall conform to the mechanical properties of Table 2. Table 2Mechanical Requirements (Properties of Flat Material Prior to Fabrication) Tensile Strength, min, MPa 310 Yield Point, min, MPa 230 Elongation in 50 mm, min percent 20 6.2. Two tension tests shall be made on random samples of finished mate
17、rial from each cast or heat. When the finished material from said cast or heat is less than 45 Mg, one test is sufficient. When material rolled from one cast or heat differs 1.27 mm or more in thickness, one tension test shall be made from both the thickest and thinnest material rolled regardless of
18、 the mass represented. The samples shall be prepared and tested in accordance with the method specified in ASTM A792/A792M and E8/E8M. 7. ALUMINUM-ZINC ALLOY COATING 7.1. The coating shall have a nominal composition of 55.0 percent aluminum, 1.6 percent silicon, and the remainder zinc (Note 3). The
19、mass of coating shall conform to the requirements prescribed in Table 3. The mass of coating is the total amount on both surfaces of the sheet expressed in g/m2of sheet. Table 3Mass of Coating (Total Both Sides) Min Check Limit Triple-Spot Test, g/m2 of Sheet Min Check Limit Single-Spot Test, g/m2 o
20、f Sheet 210 180 Note 3Chemical analysis of the coating will typically agree with the nominal composition within 3 percent for aluminum and zinc, and within 0.5 percent for silicon. 7.2. Sampling and methods of testing shall be as prescribed in T 65M/T 65 and ASTM A792/A792M, using the dilute hydroch
21、loric acid method (Note 4). Note 4T 65M/T 65 is a method for determining mass of zinc coating on steel, but the dilute hydrochloric acid method is satisfactory for determining the mass of aluminum-zinc alloy coating. 7.2.1. The mass of coating may be determined from the coating thickness measured by
22、 the x-ray fluorescence method, according to ASTM A754/A754M. When this method is used and a dispute arises, the mass shall be determined by the stripping test in T 65M/T 65. 7.3. Adherence of coating shall be such that no peeling occurs while the material is being corrugated and formed into pipe. 2
23、015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-4b M 289-4 AASHTO 8. TESTS BY MANUFACTURER 8.1. The manufacturer shall make such tests and measurements as are deemed necessary to ensure that the materi
24、al produced complies with this specification. 9. SAMPLING BY PURCHASER 9.1. Product, Check, or Verification AnalysisBase metal analysis may be made by the purchaser in accordance with ASTM A792/A792M. 9.2. Mechanical TestingTest for mechanical properties may be made by the purchaser. Testing of flat
25、 material shall be made prior to corrugating or other fabrication and shall be in accordance with ASTM A792/A792M and E8/E8M. 9.3. Mass of CoatingThe purchaser may make random checks of coating masses to assure compliance of minimum values specified in Table 3. The mass may be converted from the sum
26、 of the readings on both surfaces of the sheet by a magnetic coating thickness gauge suitably checked and demonstrated for accuracy (Notes 5 and 6). In case of dispute, additional samples shall be taken and tested in accordance with the procedure outlined in T 65M/T 65 and ASTM A792/A792M, using the
27、 dilute hydrochloric acid method (Note 4). Note 5Several magnetic types of coating thickness gauges are commercially available and are a satisfactory basis for acceptance when properly calibrated just prior to inspection use (see ASTM E376). Note 6An aluminum-zinc alloy coating mass of 210 g/m2total
28、 both sides is equivalent to an average thickness of 28 m each side. 9.4. Rejection and RehearingMaterial tested by the purchaser and found not conforming to this specification may be rejected, subject to the rejection and rehearing provisions of ASTM A792/A792M. 10. DIMENSIONS AND TOLERANCES 10.1.
29、Sheet thickness shall conform to dimensions prescribed in Table 4. If corrugated, thickness shall be measured on the tangents of the corrugations. Table 4Sheet Thickness for Corrugated Steel Pipe Specified Thickness, mm Min Thickness, mm 1.02 0.91 1.32 1.17 1.63 1.45 2.01 1.83 2.77 2.57 3.51 3.28 4.
30、27 4.04 Note: Thickness is measured on the tangents of corrugations on the sheet not less than 10 mm from an edge. 10.2. Permissible variations in width, length, and camber of flat material shall be in accordance with ASTM A792/A792M. 2015 by the American Association of State Highway and Transportat
31、ion Officials.All rights reserved. Duplication is a violation of applicable law.TS-4b M 289-5 AASHTO 10.3. Corrugations shall form smooth continuous curves and tangents. The dimensions of the corrugations shall be in accordance with Table 5 (Note 7). Note 7Some sizes of corrugations shown in Table 5
32、 may not be available in cut-length sheets. The 38-by-6.5-mm size, especially, is generally used only for helically corrugated pipe. Table 5Corrugation Requirements Nominal Size, mm Max Pitch,amm Min Depth,bmm Inside Radius Nominal, mm Min, mm 38 by 6.5 48 6.0 7 6.5 68 by 13 73 12 17 12 75 by 25 83
33、24 14 12 125 by 25 135 24 40 36 aPitch is measured from crest to crest of corrugation, at 90 degrees to the direction of the corrugations. bDepth is measured as the vertical distance from a straightedge resting on the corrugation crests to the bottom of the intervening valley. 10.4. Covering width o
34、f corrugated sheet shall be in accordance with Table 6. Covering width is the distance between the crests of the extreme corrugations. There is no established tolerance for overall width since the covering width and lip dimensions are the governing factors for the formed product. The lip dimension o
35、f corrugated sheet shall be in accordance with Table 7. This dimension is measured along the radial curvature from the crest of the corrugation to the edge of the sheet. Table 6Covering Width Tolerances for Corrugated Sheet Covering Width, mm Tolerance Over and Under, mm To 600 incl 6 Over 600 to 90
36、0 incl 10 Over 900 to 1200 incl 13 Table 7Corrugated Sheet Lip Dimensions Nominal Corrugation Size, mm For Riveted Pipe Construction,a mm For Spot Welded Pipe Construction, Min, mm 68 by 13 19 11 75 by 25 22 13 125 by 25 22 13 aTolerances, +5 mm, 0. 11. RECORDS 11.1. Test results, including chemical
37、 compositions, tensile strength, and mass of coating for each heat and coating lot, shall be maintained by the sheet manufacturer for 7 years and shall be made available to the fabricator and purchaser upon request. 12. CERTIFICATION 12.1. When specified in the purchase order, a manufacturers certif
38、ication shall be furnished to the purchaser. The certification shall show results of tests conducted on samples from each lot from which sheet is furnished. A statement shall be included that the test results conform to the requirements of M 289. The certification shall provide information necessary
39、 to identify the sheet 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-4b M 289-6 AASHTO represented, such as manufacturers name or brand, heat number, lot number, sheet thickness, coating mass, corru
40、gation size (if corrugated), and sheet size (if cut lengths). Furnishing a certification shall not restrict the right of the purchaser of the sheet (fabricator) or ultimate purchaser of the pipe made from the sheet to sample and test the material furnished. 13. MARKING 13.1. Each 0.5 to 1.5 m of she
41、et in coils or cut lengths shall be identified by showing the following: 13.1.1. Name of sheet manufacturer, 13.1.2. Brand name, 13.1.3. Specified thickness, 13.1.4. Specified mass of coating, 13.1.5. Identification symbols relating to a specific heat number and coating lot number, and 13.1.6. AASHT
42、O designation number. 13.2. The brand shall be removed, obliterated, or the sheet rebranded “Non Specification” on each 0.5 to 1.5 m of material in a coating lot or heat where control tests, as prescribed herein, show nonconformance to this specification. 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.
