ASTM A463-A463M 2009

Designation: A 463/A 463M – 09 Standard Specification for Steel Sheet, Aluminum-Coated, by the Hot-Dip Process1 This standard is issued under the fixed designation A 463/A 463M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense. 1. Scope* 1.1 This specification covers aluminum-coated steel sheet in coils and cut lengths available with two types of aluminum coating applied by the hot-dip process, with several coating weights [masses]. 1.2 Product furnished under this specification shall conform to the applicable requirements of the latest issue of Specifica- tion A 924/A 924M, unless otherwise provided herein. 1.3 This specification is applicable to orders in either inch-pound units (as A 463) or SI units [as A 463M]. Values in inch-pound and SI units are not necessarily equivalent. Within the text, SI units are shown in brackets. Each system shall be used independently of the other. 1.4 Unless the order specifies the “M” designation (SI units), the product shall be furnished to inch-pound units. 1.5 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety and health practices and determine the applica- bility of regulatory limitations prior to use. 2. Referenced Documents 2.1 ASTM Standards:2 A 428/A 428M Test Method for Weight [Mass] of Coating on Aluminum-Coated Iron or Steel Articles A 480/A 480M Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip A 902 Terminology Relating to Metallic Coated Steel Prod- ucts A 924/A 924M Specification for General Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip Process E 517 Test Method for Plastic Strain Ratio r for Sheet Metal E 646 Test Method for Tensile Strain-Hardening Exponents (n -Values) of Metallic Sheet Materials 3. Terminology 3.1 Definitions—See Terminology A 902 for definitions of general terminology relating to metallic-coated steel products. 4. Classification 4.1 The steel sheet is available in several designations, as follows: 4.1.1 Commercial Steel (CS Types A, B, and C), 4.1.2 Forming Steel (FS), 4.1.3 Deep Drawing Steel (DDS), 4.1.4 Extra Deep Drawing Steel (EDDS), 4.1.5 Structural Steel (SS), 4.1.6 High Strength-Low Alloy Steel (HSLAS Type A), 4.1.7 High Strength-Low Alloy Steel (HSLAS Type B), 4.1.8 Ferritic Stainless Steel (FSS Type 409), and 4.1.9 Ferritic Stainless Steel (FSS Type 439). 4.2 Structural Steel (SS) and High Strength-Low Alloy Steels (HSLAS Types A and B) are available in several grades and classes. 4.3 The aluminum coating is available in two types with several coating weights [masses] with coating designations as shown in Table 1. 4.3.1 Coating Type 1 is manufactured using a coating bath of aluminum–silicon alloy containing 5 to 11 % silicon to promote better adherence. It is intended principally for heat- resisting applications and also for uses where corrosion resis- tance and heat are involved. It is available as a coating on each of the designations of steel sheet listed in 4.1. 1 This specification is under the jurisdiction of ASTM Committee A05 on Metallic-Coated Iron and Steel Products and is the direct responsibility of Subcommittee A05.11 on Sheet Specifications. Current edition approved May 1, 2009. Published June 2009. Originally approved in 1962. Last previous edition approved in 2006 as A 463/A 463M - 06. 2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website. 1 *A Summary of Changes section appears at the end of this standard. Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States. 4.3.2 Coating Type 2 is a commercially pure aluminum. It is intended principally for use in applications requiring corrosion resistance and is available only as a coating on Commercial Steel, Forming Steel, Structural Steel, and High Strength-Low Alloy Steel. 5. Ordering Information 5.1 Product under this specification shall be ordered to decimal thickness only, and dimensional tolerances of Speci- fication A 924/A 924M shall apply. Specification A 480/ A 480M shall apply to FSS (Types 409 and 439) for thickness tolerances only. The following, as required, shall be used to adequately describe the product required. 5.1.1 Name of product (steel sheet, aluminum-coated Type 1 or 2), 5.1.2 Designation of sheet (CS (Types A, B, and C), FS, DDS, EDDS, SS, HSLAS (Type A or B); and FSS (Types 409 and 439)). 5.1.2.1 When a CS type is not specified, Type B will be furnished. 5.1.2.2 When a SS or HSLAS designation is specified, state the type, grade, or class, or combination thereof. 5.1.3 ASTM designation number and year of issue, 5.1.4 Coating designation, 5.1.5 Specify whether oiled or dry or chemically treated, oiled or dry, 5.1.6 Dimensions (show thickness, minimum or nominal; width; and length, if cut lengths). The purchaser shall specify the appropriate table of thickness tolerances in Specification A 924/A 924M that applies to the order, that is, the table of thickness tolerances for 3⁄8-in. [10-mm] edge distance, or the table of thickness tolerances for 1-in. [25-mm] edge distance. A 480/A 480M shall apply to FSS (Types 409 an 439) for thickness tolerances only. 5.1.7 Coil size requirements (specify maximum outside diameter (OD), acceptable inside diameter (ID), and maximum coil weight), 5.1.8 Application (show part identification and description), 5.1.9 Certification, if required, and heat analysis and me- chanical property report, and 5.1.10 Special requirements (if required). NOTE 1—Typical ordering descriptions are as follows: Steel sheet, aluminum-coated, Forming Steel (FS), ASTM A 463 – __, Coating Des- ignation T1 40, chemically treated dry, minimum 0.040 in. by 34 in. by coil, 48-in. maximum outside diameter, 20-in. inside diameter, 20 000-lb maximum coil weight, for muffler ends. Steel Sheet, aluminum-coated, Commercial Steel (CS Type A), ASTM A 463M – __, Coating Designation T1M 120, chemically treated dry, minimum 1.00 mm by 920 mm by coil, 1200-mm maximum outside diameter, 500-mm inside diameter, 10 000-kg maximum coil weight, for range heat shield. NOTE 2—The purchaser should be aware that there are variations in manufacturing practices among the producers and therefore is advised to establish the producer’s standard (or default) procedures for thickness tolerances. 6. Chemical Composition 6.1 Base Metal: 6.1.1 The heat analysis of the base metal shall conform to the requirements shown in Table 2 for CS (Types A, B, and C), FS, DDS, EDDS, and FSS (Types 409 and 439), Table 3 for SS and HSLAS. 6.1.2 When the amount of copper, nickel, chromium, or molybdenum is less than 0.02 %, report the analysis either as <0.02 % or the actual determined value. When the amount of vanadium, titanium, or columbium is less than 0.008 %, report the analysis as either <0.008 % or the actual determined value. When the amount of boron is less than 0.0005 %, report as <0.0005 % or the actual determined value. 6.1.3 See Specification A 924/A 924M for chemical analy- sis procedures and product analysis tolerances. 6.1.4 The heat analysis of the base metal for FSS (Types 409 and 439) shall conform to the requirements shown in Table 2. 6.1.5 See Specification A 480/A 480M for chemical analy- sis procedures and product analysis tolerances for FSS (Types 409 and 439). 6.2 Coating Bath Composition: 6.2.1 The bath metal used for Type 1 shall contain an aluminum-silicon alloy containing 5 to 11 % silicon, the balance aluminum. 6.2.2 The bath metal used for Type 2 shall contain commer- cially pure aluminum. 7. Mechanical Properties 7.1 Structural steel and high strength low alloy steel shall conform to the mechanical property requirements of Table 4 for the type, grade, or class, or combination thereof, specified. 7.2 The typical mechanical properties for CS (Types A, B, and C), FS, DDS, EDDS and FSS (Types 409 and 439), steel TABLE 1 Weight [Mass] of Coating RequirementsA,B NOTE 1—Tables X2.1 and X2.2 provide an estimate of coating thick- ness based on coating weight [mass]. Coating Designation Minimum Requirement Triple-Spot Test, Total Both Sides Single-Spot Test, Total Both Sides Inch-Pound Units oz/ft2 oz/ft2 T1–13 0.13 0.10 T1–25 0.25 0.20 T1–40 0.40 0.30 T1–100 1.00 0.90 T2–LC no minimum no minimum T2–65 0.65 0.60 T2–100 1.00 0.90 SI Units g/m2 g/m2 T1M 40 40 30 T1M 75 75 60 T1M 120 120 90 T1M 300 300 270 T2M LC no minimum no minimum T2M 200 200 180 T2M 300 300 270 A The coating designation number is the term by which this product is specified. Because of the many variables and changing conditions that are characteristic of continuous hot-dip coating lines, the weight [mass] of coating is not always evenly divided between the two surfaces of a sheet, nor is the coating evenly distributed from edge to edge. However, normally not less than 40 % of the single-spot test limit will be found on either surface. B No minimum means that there are no established minimum requirements for triple- and single-spot tests, but aluminum coating shall be present. A 463/A 463M – 09 2 sheet designations are listed in Table 5. These mechanical property values are nonmandatory. They are solely to provide the purchaser with as much information as possible to make an informed decision on the steel to be specified. Values outside these ranges are to be expected. 7.3 When base metal mechanical properties are required, all tests shall be conducted in accordance with the methods specified in Specification A 924/A 924M. 7.4 Bending Properties: 7.4.1 Minimum Cold Bending Radii—Structural steel sheet is commonly fabricated by cold bending. There are many interrelated factors that affect the ability of a steel to cold form over a given radius under shop conditions. These factors include: thickness, strength level, degree of restraint, relation- ship to rolling direction, chemistry, and base metal microstruc- ture. Appendix X1 lists the suggested minimum inside radius for 90° cold bending for these steel sheets. They presuppose “hard way” bending (bend axis parallel to rolling direction) and TABLE 2 Chemical Requirements Composition, %—Heat Analysis Element, max (unless otherwise shown) Designation C Mn P S AlA CuB NiB CrB MoB V CbC Ti B CS Type AD,E,F 0.10 0.60 0.030 0.035 . . . 0.20 0.20 0.15 0.06 0.008 0.008 0.30 . . . CS Type BD,F 0.02 to 0.15 0.60 0.030 0.035 . . . 0.20 0.20 0.15 0.06 0.008 0.008 0.30 . . . CS Type CD,F 0.08 0.60 0.10 0.035 . . . 0.20 0.20 0.15 0.06 0.008 0.008 0.30 . . . FSF 0.02 to 0.10 0.50 0.020 0.030 . . . 0.20 0.20 0.15 0.06 0.008 0.008 0.30 . . . DDSG,H 0.06 0.50 0.020 0.025 0.01, min 0.20 0.20 0.15 0.06 0.008 0.008 0.30 . . . EDDSI,H 0.02 0.40 0.020 0.020 0.01, min 0.20 0.20 0.15 0.06 0.008 0.008 0.30 . . . FSS Type 409J 0.030 1.00 0.040 0.020 . . . 0.50 0.50 10.5 to 11.7 0.60 ... ... J . . . FSS Type 439K 0.030 1.00 0.040 0.030 0.15 0.50 0.50 17.0 to 19.0 0.06 ... ... K . . . AWhere an ellipsis (. . .) appears in the table, there is no requirement, but the analysis result shall be reported. BThe sum of copper, nickel, chromium, and molybdenum shall not exceed 0.50 % on heat analysis. When one or more of these elements are specified, the sum does not apply; in which case, only the individual limits on the remaining elements shall apply. This requirement does not apply to Types 409 and 439. CFor steels having a carbon content of 0.02 % or less, the limit for columbium is 0.045 % maximum. This requirement does not apply to Types 409 and 439. DFor CS, specify Type B to avoid carbon levels below 0.02 %. ECS Type B describes the typical commercial quality product previously included in this specification. FWhen a deoxidized steel is required for the application, the purchaser has the option to order CS and FS to a minimum of 0.01 % total aluminum. GFurnished either as stabilized or not-stabilized steel at the producer’s option. H DDS and EDDS are available only as Coating Type 1 steel sheet. IShall be furnished as a stabilized steel. JShall contain silicon 1.00 % maximum, nitrogen 0.030 % maximum, and titanium [6 3 (carbon + nitrogen)] minimum to 0.50 % maximum or titanium + columbium [0.08 + 8 3 (carbon + nitrogen)] minimum to 0.75 % maximum with 0.05 % minimum titanium. KShall contain silicon 1.00 % maximum, nitrogen 0.030 % maximum, titanium + columbium [0.20 + 4 3 (carbon + nitrogen)] minimum to 1.10 % maximum. TABLE 3 Chemical RequirementsA Composition, %—Heat Analysis Element, max (unless otherwise shown) Designation C Mn P S CuB NiB CrB MoB VC CbC,D Ti SS Grade 33 [230] 0.20 . . . 0.40 0.04 0.20 0.20 0.15 0.06 0.008 0.008 0.30 Grade 37 [255] 0.20 . . . 0.10 0.04 0.20 0.20 0.15 0.06 0.008 0.008 0.30 Grade 40 [275] 0.25 . . . 0.10 0.04 0.20 0.20 0.15 0.06 0.008 0.008 0.30 Grade 50 [340](Classes 1 and 2) 0.25 . . . 0.20 0.04 0.20 0.20 0.15 0.06 0.008 0.008 0.30 Grade 50 [340](Class 3) 0.25 . . . 0.04 0.04 0.20 0.20 0.15 0.06 0.008 0.008 0.30 Grade 80 [550] 0.20 . . . 0.04 0.04 0.20 0.20 0.15 0.06 0.008 0.008 0.30 HSLAS Type AE Grade 50 [340] 0.20 1.20 . . . 0.035 0.20 0.20 0.15 0.06 0.008 0.008 0.30 Grade 60 [410] 0.20 1.35 . . . 0.035 0.20 0.20 0.15 0.06 0.008 0.008 0.30 Grade 70 [480] 0.20 1.65 . . . 0.035 0.20 0.20 0.15 0.06 0.008 0.008 0.30 Grade 80 [550] 0.20 1.65 . . . 0.035 0.20 0.20 0.15 0.06 0.008 0.008 0.30 HSLAS Type BE,F Grade 50 [340] 0.15 1.20 . . . 0.035 0.20 0.20 0.15 0.06 0.008 0.008 0.30 Grade 60 [410] 0.15 1.20 . . . 0.035 0.20 0.20 0.15 0.06 0.008 0.008 0.30 Grade 70 [480] 0.15 1.65 . . . 0.035 0.20 0.20 0.15 0.06 0.008 0.008 0.30 Grade 80 [550] 0.15 1.65 . . . 0.035 0.20 0.20 0.15 0.06 0.008 0.008 0.30 AWhere an ellipsis (. . .) appears in the table, there is no requirement, but the analysis result shall be reported. BThe sum of copper, nickel, chromium and molybdenum shall not exceed 0.50 % on heat analysis. When one or more of these elements are specified the sum does not apply; in which case, only the individual limits on the remaining elements shall apply. CThe limits do not apply when HSLAS is specified. DFor steels having a carbon content of 0.02 % or less, the limit for columbium is 0.045 % max. ESteel conforming to this designation commonly contains the strengthening elements columbium, nitrogen, phosphorus, or vanadium added singly or in combination. FThe producer has the option to treat these steels by means of small alloy additions to effect sulfide inclusion control. A 463/A 463M – 09 3 TABLE 4 Mechanical Requirements, Base Metal (Longitudinal) Inch-Pound Units Designation Grade Yield Strength, min, ksi Tensile Strength, min, ksiA Elongation in 2 in., min, %A SS 33 33 45 20 37 37 52 18 40 40 55 16 50 (Class 1) 50 65 12 50 (Class 2) 50 . . . 12 50 (Class 3) 50 70 12 80B 80C 82 . . . HSLAS Type A 50 50 60D 20 60 60 70D 16 70 70 80D 12 80 80 90D 10 HSLAS Type B 50 50 60D 22 60 60 70D 18 70 70 80D 14 80 80 90D 12 SI Units Designation Grade Yield Strength, min, MPa Tensile Strength, min, MPaA Elongation in 50 mm, min, %A SS 230 230 310 20 255 255 360 18 275 275 380 16 340 (Class 1) 340 450 12 340 (Class 2) 340 . . . 12 340 (Class 3) 340 480 12 550B 550C 570 . . . HSLAS Type A 340 340 410D 20 410 410 480D 16 480 480 550D 12 550 550 620D 10 HSLAS Type B 340 340 410D 22 410 410 480D 18 480 480 550D 14 550 550 620D 12 A Where an ellipsis (. . .) appears, there is no requirement. B If the hardness result is 85 HRB or higher, no tension test is required. C As there is no discontinuous yield curve, the yield strength should be taken as the stress at 0.5 % elongation under load or 0.2 % offset. D If a higher tensile strength is required, the user should consult the producer. TABLE 5 Typical Ranges of Mechanical Properties (Nonmandatory) (Longitudinal Direction)A,B Designation Yield Strength Elongation, % rm ValueC n ValueD ksi [MPa] CS Type A 25/50 [170/345] $20 E E CS Type B 30/50 [205/345] $20 E E CS Type C 25/55 [170/380] $15 E E FS 25/45 [170/310] $26 1.0/1.4 0.17/0.21 DDSF 20/35 [140/240] $32 1.2/1.7 0.19/0.24 EDDSF 18/30 [125/205] $38 1.5/2.0 0.21/0.26 FSS Type 409 25/50 [170/345] $20 E E FSS Type 439 30/60 [205/415] $22 E E A The typical mechanical property values presented here are nonmandatory. They are intended solely to provide the purchaser with as much information as possible to make an informed decision on the steel to be specified. Values outside of these ranges are to be expected. The purchaser may negotiate with the supplier if a specific range or a more restrictive range is required for the application. B These typical mechanical properties apply to the full range of steel sheet thicknesses. The yield strength tends to increase and some of the formability values tend to decrease as the sheet thickness decreases. C rm Value—Average plastic strain ratio as determined by the method in Test Method E 517. D n Value—Strain-hardening exponent as determined by the method in Test Method E 646. E No typical mechanical properties have been established. F DDS and EDDS are available only as Coating Type 1 steel sheet. A 463/A 463M – 09 4 reasonably good shop forming practices. Where possible, the use of larger radii or “easy way” bends are recommended for improved performance. 7.4.2 Fabricators should be aware that cracks may initiate upon bending a sheared edge. This is not considered to be a fault of the steel but is rather a function of the induced cold-work. 8. Coating Properties 8.1 Coating Weight [Mass]—Coating weight [mass] shall conform to the requirements as shown in Table 1 for the specific coating designation. 8.2 Coating Weight [Mass] Tests: 8.2.1 Coating weight [mass] tests shall be performed in accordance with the requirements stated in Specification A 924/A 924M. 8.2.2 The referee method to be used shall be Test Method A 428. 8.3 Coating Bend Test: 8.3.1 The bend test specimens of coated sheet shall be capable of being bent through 180° in any direction without flaking of the coating on the outside of the bend only. For all designations the coating bend test inside diameter shall be equal to twice the thickness of the specimen. Flaking of the coating within 0.25 in. [6 mm] of the edge of the bend specimen shall not be cause for rejection. 8.3.2 Coating bend test specimens shall be taken in accor- dance with Specification A 924/A 924M. 9. Retests and Disposition of Non-Conforming Material 9.1 Retests, conducted in accordance with the requirements of the section on Retests and Disposition of Non-Conforming Material of Specification A 924/A 924M, are permitted when an unsatisfactory test result is suspected to be the consequence of the test method procedure. 9.2 Disposition of non-conforming material shall be subject to the requirements of 9.2 of Specification A 924/A 924M. 10. Dimensions and Permissible Variations 10.1 All dimensions and permissible variations shall com- ply with the requirements of Specification A 924/A 924M. 11. Keywords 11.1 aluminum-coated steel; coatings—aluminum; metallic coatings; steel sheet—aluminum coated APPENDIXES (Nonmandatory Information) X1. BENDING PROPE