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Designation: A1046/A1046M − 14

Standard Specification for

Steel Sheet, Zinc-Aluminum-Magnesium Alloy-Coated by the
Hot-Dip Process1
This standard is issued under the fixed designation A1046/A1046M; 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.

1. Scope* A90/A90M Test Method for Weight [Mass] of Coating on

1.1 This specification covers zinc-aluminum-magnesium Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
alloy-coated steel sheet in coils and cut lengths. A568/A568M Specification for Steel, Sheet, Carbon,
Structural, and High-Strength, Low-Alloy, Hot-Rolled and
1.2 This product is intended for applications requiring Cold-Rolled, General Requirements for
corrosion resistance and paintability. A902 Terminology Relating to Metallic Coated Steel Prod-
1.3 The steel sheet is produced in a number of designations, ucts
types, grades and classes designed to be compatible with A924/A924M Specification for General Requirements for
differing application requirements. Steel Sheet, Metallic-Coated by the Hot-Dip Process
1.4 Product furnished under this specification shall conform E517 Test Method for Plastic Strain Ratio r for Sheet Metal
to the applicable requirements of the latest issue of Specifica- E646 Test Method for Tensile Strain-Hardening Exponents
tion A924/A924M, unless otherwise provided herein. (n -Values) of Metallic Sheet Materials
1.5 The text of this standard references notes and footnotes 3. Terminology
which provide explanatory material. These notes and footnotes, 3.1 Definitions:
excluding those in tables and figures, shall not be considered as See Terminology A902 for definitions of general terminology
requirements of the standard. relating to metallic-coated hot-dip products.
1.6 This specification is applicable to orders in either
inch-pound units (as A1046) or SI units (as A1046M). Values 4. Classification
in inch-pound and SI units are not necessarily equivalent. 4.1 The material is available in several designations as
Within the text, SI units are shown in brackets. Each system follows:
shall be used independently of the other. 4.1.1 Commercial Steel—CS Types A, B, and C,
1.7 Unless the order specifies the “M” designation (SI 4.1.2 Deep Drawing Steel—DDS,
units), the product shall be furnished to inch-pound units. 4.1.3 Extra Deep Drawing Steel—EDDS,
4.1.4 Forming Steel—FS Types A and B,
1.8 This standard does not purport to address all of the
4.1.5 High Strength Low Alloy Steel—HSLAS,
safety concerns, if any, associated with its use. It is the
4.1.6 High Strength Low Alloy Steel with Improved
responsibility of the user of this standard to establish appro-
Formability—HSLAS-F.
priate safety and health practices and determine the applica-
4.1.7 Structural Steel—SS,
bility of regulatory limitations prior to use.
4.2 Structural steel and high strength low alloy steel are
2. Referenced Documents available in several grades based on mechanical properties.
2.1 ASTM Standards:2 Structural Steel Grade 50 [340] is available in four classes
based on tensile strength.
4.3 The product is available in several coating weights
1
This specification is under the jurisdiction of ASTM Committee A05 on [masses] with the coating designation in accordance with Table
Metallic-Coated Iron and Steel Products and is the direct responsibility of 1.
Subcommittee A05.11 on Sheet Specifications.
Current edition approved May 1, 2014. Published May 2014. Originally
5. Ordering Information
approved in 2006. Last previous edition approved in 2010 as A1046/
A1046M - 10aε1. DOI: 10.1520/A1046_A1046M-14. 5.1 Zinc-aluminum-magnesium alloy-coated steel sheet in
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
coils and cut lengths is produced to thickness requirements
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 expressed to 0.001 in. [0.01 mm]. The thickness of the sheet
the ASTM website. includes the base metal and the coating.

*A Summary of Changes section appears at the end of this standard

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A1046/A1046M − 14
TABLE 1 Weight [Mass] of Coating RequirementA
Inch-Pound Units
Minimum Requirement
Coating
Triple-Spot Test Single-Spot Test
Designation
Total Both Sides, oz/ft2 Total Both Sides, oz/ft2
ZM20 0.20 0.16
ZM30 0.30 0.25
ZM40 0.40 0.30
ZM50 0.50 0.40
ZM60 0.60 0.50
ZM70 0.70 0.60
ZM75 0.75 0.65
ZM90 0.90 0.80
ZM100 1.00 0.90
ZM115 1.15 1.00
ZM140 1.40 1.20
ZM165 1.65 1.40
ZM210 2.10 1.80
SI Units
Minimum Requirement
Coating
Triple-Spot Test Single-Spot Test
Designation
Total Both Sides, g/m2 Total Both Sides, g/m2
ZMM60 60 50
ZMM90 90 75
ZMM120 120 90
ZMM150 150 120
ZMM180 180 150
ZMM210 210 180
ZMM220 220 190
ZMM275 275 235
ZMM300 300 270
ZMM350 350 300
ZMM450 450 385
ZMM500 500 425
ZMM600 600 510
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 the coating is not always evenly divided between the two surfaces of a sheet, nor is the coating evenly distributed from edge
to edge. However, it can normally be expected that not less than 40 % of the single-spot test limit will be found on either surface.

5.2 Orders for product to this specification shall include the 5.2.12 Application (show part identification and
following information, as necessary, to adequately describe the description), and
desired product: 5.2.13 Special requirements (if any).
5.2.1 Name of product (steel sheet, zinc-aluminum- 5.2.13.1 When the purchaser requires thickness tolerances
magnesium alloy-coated), for 3⁄8-in. [10-mm] minimum edge distance (see Supplemen-
5.2.2 Designation of sheet steel {CS (Type A, B, or C), FS tary Requirement in specification A924/A924M), this require-
(Type A or B), DDS, EDDS, SS, HSLAS or HSLAS-F}, ment shall be specified in the purchase order or contract.
5.2.2.1 When a CS type is not specified, CS Type B will be NOTE 1—Typical ordering descriptions are as follows:
furnished. When an FS type is not specified, FS Type B will be Steel sheet, zinc-aluminum-magnesium alloy coated, Forming Steel Type
furnished. B, ASTM A1046-___, coating designation ZM90, chemical treatment, no
5.2.3 When an SS or HSLAS designation is specified, state oil, minimum 0.034 by 48 in. by coil, 60-in. maximum OD, 24-in. ID,
the grade or class, or combination thereof. 10,000-lb maximum, for inner door panel, or steel sheet, zinc-aluminum-
magnesium alloy coated, Commercial Steel Type B, ASTM A1046M-___,
5.2.4 ASTM designation number and year of issue, such as coating designation ZMM275, not chemically treated, oiled, minimum
A1046-___ for inch-pound units or A1046M-___ for SI units, 0.85 by 900 mm by coil, 1200-mm maximum OD, 610-mm ID, 9,000-kg
5.2.5 Coating designation, maximum, for building panels.
5.2.6 Chemically treated or not chemically treated,
5.2.7 Oiled or not oiled, 6. Chemical Composition
5.2.8 Dimensions (show thickness, mimimum or nominal, 6.1 Base Metal:
width, flatness requirements (if appropriate), and length (if cut 6.1.1 The heat analysis of the base metal shall conform to
length)). the requirements shown in Table 2 for CS (Types A, B, and C),
5.2.9 Coil size requirements (specify maximum outside FS (Types A and B), DDS and EDDS, and Table 3 for SS,
diameter (OD), acceptable inside diameter (ID), and maximum HSLAS and HSLAS-F.
weight [mass]), 6.1.2 Each of the elements listed in Tables 2 and 3 shall be
5.2.10 Packaging, included in the report of heat analysis. When the amount of
5.2.11 Certification, if required, and heat analysis and me- copper, nickel, chromium, or molybdenum is less than 0.02 %,
chanical property report, report the analysis as either <0.02 % or the actual determined

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TABLE 2 Chemical RequirementsA
Composition, %-Heat Analysis Element, max (unless otherwise shown)
Designation C Mn P S Al, min Cu Ni Cr Mo V Cb TiB N
CS Type AC,D ,E 0.10 0.60 0.030 0.035 ... 0.20 0.20 0.15 0.06 0.008 0.008 0.025 ...
CS Type BC,F 0.02 to 0.15 0.60 0.030 0.035 ... 0.20 0.20 0.15 0.06 0.008 0.008 0.025 ...
CS Type CC,D ,E 0.08 0.60 0.100 0.035 ... 0.20 0.20 0.15 0.06 0.008 0.008 0.025 ...
FS Type AC,G 0.10 0.50 0.020 0.035 ... 0.20 0.20 0.15 0.06 0.008 0.008 0.025 ...
FS Type BC,F 0.02 to 0.10 0.50 0.020 0.030 ... 0.20 0.20 0.15 0.06 0.008 0.008 0.025 ...
DDSD,E,H 0.06 0.50 0.020 0.025 0.01 0.20 0.20 0.15 0.06 0.008 0.008 0.025 ...
EDDSH,I 0.02 0.40 0.020 0.020 0.01 0.20 0.20 0.15 0.06 0.10 0.10 0.15 ...
A
Where an ellipsis (...) appears in this table, there is no requirement, but the analysis shall be reported.
B
For steels containing more than 0.02 % carbon, titanium is permitted to 0.025 % provided the ratio of % titanium to % nitrogen does not exceed 3.4.
C
When 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.
D
Steel is permitted to be furnished as a vacuum degassed or chemically stabilized steel, or both, at the producer’s option.
E
For carbon levels less than or equal to 0.02 %, vanadium, columbium, or titanium, or combinations thereof are permitted to be used as stabilizing elements at the
producer’s option. In such cases, the applicable limit for vanadium and columbium shall be 0.10 % max. and the limit for titanium shall be 0.15 % max.
F
For CS and FS, specify Type B to avoid carbon levels below 0.02 %.
G
Shall not be furnished as a stabilized steel.
H
Minimum Al content is not required if agreed to by purchaser and supplier.
I
Shall be furnished as a stabilized steel.

TABLE 3 Chemical RequirementsA

Composition, %-Heat Analysis Element, max (unless otherwise shown)
Designation C Mn P S Cu Ni Cr Mo VB CbB TiB,C ,D N
SS Grade
33 [230] 0.20 ... 0.04 0.040 0.20 0.20 0.15 0.06 0.008 0.008 0.025 ...
37 [255] 0.20 ... 0.10 0.040 0.20 0.20 0.15 0.06 0.008 0.008 0.025 ...
40 [275] 0.25 ... 0.10 0.040 0.20 0.20 0.15 0.06 0.008 0.008 0.025 ...
50 [340] Class 1,2 and 4 0.25 ... 0.20 0.040 0.20 0.20 0.15 0.06 0.008 0.008 0.025 ...
50 [340] Class 3 0.25 ... 0.04 0.040 0.20 0.20 0.15 0.06 0.008 0.008 0.025 ...
80 [550] 0.20 ... 0.04 0.040 0.20 0.20 0.15 0.06 0.008 0.015 0.025 ...
HSLASE
40 [275] 0.20 1.50 ... 0.035 ... 0.20 0.15 0.16 0.01 min 0.005 min 0.01 min ...
50 [340] 0.20 1.50 ... 0.035 0.20 0.20 0.15 0.16 0.01 min 0.005 min 0.01 min ...
60 [410] 0.20 1.50 ... 0.035 0.20 0.20 0.15 0.16 0.01 min 0.005 min 0.01 min ...
70 [480] 0.20 1.65 ... 0.035 0.20 0.20 0.15 0.16 0.01 min 0.005 min 0.01 min ...
80 [550] 0.20 1.65 ... 0.035 0.20 0.20 0.15 0.16 0.01 min 0.005 min 0.01 min ...
HSLAS-FF
40 [275] 0.15 1.50 ... 0.035 ... 0.20 0.15 0.16 0.01 min 0.005 min 0.01 min ...
50 [340] 0.15 1.50 ... 0.035 0.20 0.20 0.15 0.16 0.01 min 0.005 min 0.01 min ...
60 [410] 0.15 1.50 ... 0.035 0.20 0.20 0.15 0.16 0.01 min 0.005 min 0.01 min ...
70 [480] 0.15 1.65 ... 0.035 0.20 0.20 0.15 0.16 0.01 min 0.005 min 0.01 min ...
80 [550] 0.15 1.65 ... 0.035 0.20 0.20 0.15 0.16 0.01 min 0.005 min 0.01 min ...
A
Where an ellipsis (...) appears in this table there is no requirement, but the analysis shall be reported.
B
For carbon levels less than or equal to 0.02 %, vanadium, columbium, or titanium, or combinations thereof, are permitted to be used as stabilizing elements at the
producer’s option. In such cases, the applicable limit for vanadium and columbium shall be 0.10 % max, and the limit for titanium shall be 0.15 % max.
C
Titanium is permitted for SS steels to 0.025 % provided the ratio of % titanium to % nitrogen does not exceed 3.4.
D
For steels containing more than 0.02 % carbon, titanium is permitted to 0.025 %, provided the ratio of % titanium to % nitrogen does not exceed 3.4.
E
HSLAS and HSLAS-F steels commonly contain the strengthening elements columbium, vanadium, and titanium added singly or in combination. The minimum
requirements only apply to the microalloy elements selected for strengthening of the steel.
F
The producer has the option to treat HSLAS-F steels by means of small alloy additions to effect sulfide inclusion control.

value. When the amount of vanadium, titanium or columbium 7.2 The typical mechanical properties for CS (Types A, B,
is less than 0.008 %, report the analysis as either <0.008 % or and C), FS (Types A and B), DDS, EDDS steel sheet
the actual determined value. designations are listed in Table 5. These mechanical property
6.1.3 See Specification A924/A924M for chemical analysis values are non-mandatory. They are intended solely to provide
procedures and product analysis tolerances. the purchaser with as much information as possible to make an
6.2 Coating Bath Composition—The bath metal used for informed decision on the steel to be specified. Values outside
zinc-aluminum-magnesium alloy–coated sheet shall contain 5 these ranges are to be expected.
to 13 % aluminum, 2 to 4 % magnesium, up to 1 % total 7.3 When base metal mechanical properties are required, all
additional alloying elements (except iron) and the balance zinc. tests shall be conducted in accordance with the methods
specified in Specification A924/A924M.
7. Mechanical Properties 7.4 Bending Properties:
7.1 Structural steel and high strength low alloy steel shall 7.4.1 Minimum Cold Bending Radii—Structural steel sheet
conform to the mechanical property requirements of Table 4 is commonly fabricated by cold bending. There are many
for the grade or class or combination thereof, specified. interrelated factors that affect the ability of a steel to cold form

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TABLE 4 Mechanical Property Requirements, Base Metal (Longitudinal)
Inch-Pound Units
Designation Grade Yield Strength, Tensile Strength, Elongation
min, ksi min, ksiA 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
50 Class 4 50 60 12
80B 80C 82 ...
HSLAS 40 40 50D 22
50 50 60D 20
60 60 70D 16
70 70 80D 12
80 80 90D 10
HSLAS-F 40 40 50D 24
50 50 60D 22
60 60 70D 18
70 70 80D 14
80 80 90D 12
SI Units
Designation Grade Yield Strength, Tensile Strength, Elongation
min, MPa min, MPaA 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
340 Class 4 340 410 12
550B 550C 570 ...
HSLAS 275 275 340D 22
340 340 410D 20
410 410 480D 16
480 480 550D 12
550 550 620D 10
HSLAS-F 275 275 340D 24
340 340 410D 22
410 410 480D 18
480 480 550D 14
550 550 620D 12
A
Where an ellipsis (...) appears in this table there is no requirement.
B
For sheet thickness of 0.028 in. [0.71 mm] or thinner, no tension test is required if the hardness result in Rockwell B85 or higher.
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)A,B

(Longitudinal Direction)
Designation Yield Strength Elongation in rm ValueC N ValueD
ksi MPa 2 in. [50 mm] %
E E
CS Type A 25/55 [170/380] $20
E E
CS Type B 30/55 [205/380] $20
E E
CS Type C 25/60 [170/410] $15
FS Types A and B 25/45 [170/310] $26 1.0/1.4 0.17/0.21
DDS 20/35 [140/240] $32 1.4/1.8 0.19/0.24
EDDSF 15/25 [105/170] $40 1.6/2.1 0.22/0.27
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 Test Method E517.
D
N Value—Strain-hardening exponent as determined by Test Method E646.
E
No typical mechanical properties have been established.
F
EDDS Sheet will be free from changes in mechanical properties over time, that is, nonaging.

over a given radius under shop conditions. These factors ture. Appendix X1 lists the suggested minimum inside radius
include: thickness, strength level, degree of restraint, relation- for 90° cold bending for these steel sheets. They pre-suppose
ship to rolling direction, chemistry and base metal microstruc- “hard way” bending (bend axis parallel to rolling direction) and

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TABLE 6 Coating Bend Test Requirements
Inch-Pound Units
Ratio of the Bend Diameter to Thickness of the Specimen (Any Direction)
Coating CS, FS, DDS, EDDS SS GradeB HSLASB HSLAS-F
DesignationA Sheet Thickness
Through 0.039 in. Over 0.039 Over 0.079 in. 33 37 40 40 50 60 40 50 60 70 80
through 0.079 in.
ZM20 0 0 0 1 1⁄2 2 2 1⁄ 2 1 1⁄ 2 1 1⁄ 2 3 1 1 1 1 1 ⁄2 1 1⁄ 2
ZM30 0 0 0 11⁄2 2 2 1⁄ 2 1 1⁄ 2 1 1⁄ 2 3 1 1 1 1 1 ⁄2 1 1⁄ 2
ZM40 0 0 0 11⁄2 2 2 1⁄ 2 1 1⁄ 2 1 1⁄ 2 3 1 1 1 1 1 ⁄2 1 1⁄ 2
ZM50 0 0 0 1 ⁄2
1 2 2 ⁄2
1 1 ⁄2
1 1 ⁄2
1 3 1 1 1 1 1 ⁄2 1 1⁄ 2
ZM60 0 0 0 1 ⁄2
1 2 2 ⁄2
1 1 ⁄2
1 1 ⁄2
1 3 1 1 1 1 1 ⁄2 1 1⁄ 2
ZM70 0 0 0 11⁄2 2 2 1⁄ 2 1 1⁄ 2 1 1⁄ 2 3 1 1 1 1 1 ⁄2 1 1⁄ 2
ZM75 0 0 0 11⁄2 2 2 1⁄ 2 1 1⁄ 2 1 1⁄ 2 3 1 1 1 1 1 ⁄2 1 1⁄ 2
ZM90 0 0 1 11⁄2 2 2 1⁄ 2 1 1⁄ 2 1 1⁄ 2 3 1 1 1 1 1 ⁄2 1 1⁄ 2
ZM100 0 0 1 11⁄2 2 2 1⁄ 2 1 1⁄ 2 1 1⁄ 2 3 1 1 1 1 1 ⁄2 1 1⁄ 2
ZM115 0 0 1 11⁄2 2 2 1⁄ 2 1 1⁄ 2 1 1⁄ 2 3 1 1 1 1 1 ⁄2 1 1⁄ 2
ZM140 1 1 2 2 2 2 ⁄2
1

ZM165 2 2 2 2 2 2 ⁄2
1

ZM210 2 2 2 2 2 21⁄2
SI-Units
Ratio of the Bend Diameter to Thickness of the Specimen (Any Direction)
Coating CS, FS, DDS, EDDS SS GradeC HSLASC HSLAS-F
DesignationA Sheet Thickness
Through 1.0 mm Over 1.0 Over 2.0 mm 230 255 275 275 340 410 275 340 410 480 550
through 2.0 mm
ZMM60 0 0 0 1 1⁄2 2 2 1⁄ 2 1 1⁄ 2 1 1⁄ 2 3 1 1 1 1 1 ⁄2 1 1⁄ 2
ZMM90 0 0 0 11⁄2 2 2 1⁄ 2 1 1⁄ 2 1 1⁄ 2 3 1 1 1 1 1 ⁄2 1 1⁄ 2
ZMM120 0 0 0 11⁄2 2 2 1⁄ 2 1 1⁄ 2 1 1⁄ 2 3 1 1 1 1 1 ⁄2 1 1⁄ 2
ZMM150 0 0 0 11⁄2 2 2 1⁄ 2 1 1⁄ 2 1 1⁄ 2 3 1 1 1 1 1 ⁄2 1 1⁄ 2
ZMM180 0 0 0 11⁄2 2 2 1⁄ 2 1 1⁄ 2 1 1⁄ 2 3 1 1 1 1 1 ⁄2 1 1⁄ 2
ZMM210 0 0 0 11⁄2 2 2 1⁄ 2 1 1⁄ 2 1 1⁄ 2 3 1 1 1 1 1 ⁄2 1 1⁄ 2
ZMM220 0 0 0 1 ⁄2
1 2 2 ⁄2
1 1 ⁄2
1 1 ⁄2
1 3 1 1 1 1 1 ⁄2 1 1⁄ 2
ZMM275 0 0 1 11⁄2 2 2 1⁄ 2 1 1⁄ 2 1 1⁄ 2 3 1 1 1 1 1 ⁄2 1 1⁄ 2
ZMM300 0 0 1 11⁄2 2 2 1⁄ 2 1 1⁄ 2 1 1⁄ 2 3 1 1 1 1 1 ⁄2 1 1⁄ 2
ZMM350 0 0 1 11⁄2 2 2 1⁄ 2 1 1⁄ 2 1 1⁄ 2 3 1 1 1 1 1 ⁄2 1 1⁄ 2
ZMM450 1 1 2 2 2 21⁄2
ZMM500 2 2 2 2 2 21⁄2
ZMM600 2 2 2 2 2 21⁄2
A
If other coatings are required, the user should consult the producer for availability and suitable bend test requirements.
B
SS Grades 50 and 80 and HSLAS Grades 70 and 80 are not subject to bend test requirements.
C
SS Grades 340 and 550 and HSLAS Grades 480 and 550 are not subject to bend test requirements.

reasonably good shop forming practices. Where possible, the 8.1.3.1 1.00 oz/ft2 coating weight = 305 g/m2 coating mass.
use of larger radii or “easy way” bending is recommended for 8.2 Coating Weight [Mass] Tests:
improved performance. 8.2.1 Coating weight [mass] tests shall be performed in
7.4.2 Fabricators should be aware that cracks may initiate accordance with the requirements stated in Specification A924/
upon bending a sheared edge or cold-worked edge. This is not A924M.
considered to be a fault of the steel, but is rather a function of 8.2.2 The referee method to be used shall be the dilute
the induced localized cold-work zone. hydrochloric acid method, in Test Method A90/A90M
8. Coating Properties 8.3 Coating Bend Test—The coating bend test specimens
8.1 Coating Weight [Mass]: shall be capable of being bent through 180° in any direction
8.1.1 Coating weight [mass] shall conform to the require- without flaking of the coating on the outside of the bend only.
ments as shown in Table 1 for the specific coating designation. The coating bend test inside diameter shall have a relation to
8.1.2 Use the following relationships to estimate the coating the thickness of the specimen as shown in Table 6. Flaking of
thickness from the coating weight [mass]: the coating within 0.25 in. [6 mm] of the edge of the bend
8.1.2.1 For product coated with bath Al content from 5 to specimen shall not be cause for rejection.
9 %, 1.00 oz/ft2 coating weight = 2.00 mils coating thickness,
9. Dimensions and Permissible Variations
8.1.2.2 6.01 g/m2 coating mass = 1.00 µm coating thickness,
8.1.2.3 For product coated with bath Al content from 9 to 9.1 All dimensions and permissible variations shall comply
13 %, 1.00 oz/ft2 coating weight = 2.10 mils coating thickness, with the requirements of Specification A924/A924M.
and
8.1.2.4 5.70 g/m2 coating mass = 1.00 µm coating thickness. 10. Keywords
8.1.3 Use the following relationship to convert coating 10.1 coatings, metallic; steel sheet, metallic coated; zinc-
weight to coating mass: aluminum-magnesium alloy coating

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SUPPLEMENTARY REQUIREMENTS

The following standardized supplementary requirements are for use when desired by the purchaser.
These additional requirements shall apply only when specified on the order.

S1. Base Metal Thickness S1.3 The applicable tolerances for base metal thickness are
S1.1 The specified minimum thickness shall apply to the shown in Tables 17 and 18, Thickness Tolerance of Cold-
base metal only. Rolled Sheet (Carbon and High-Strength, Low-Alloy Steel), of
Specification A568/A568M.
S1.2 The coating designation shown on the order indicates
the coating to be applied to the specified minimum base metal
thickness.

APPENDIX

(Nonmandatory Information)

X1. BENDING PROPERTIES

X1.1 Table X1.1 lists suggested minimum inside radii for TABLE X1.1 Suggested Minimum Inside Radii for Cold BendingA
cold bending. NOTE 1—t = radius equivalent to the steel thickness.
NOTE 2—The suggested radii should be used as minimums for 90°
bends in actual shop practice.
Designation Grade Minimum Inside Radius
for Cold BendingB
SS 33 [230] 11⁄2 t
37 [255] 2t
40 [275] 2t
50 [340] not
(Classes 1, 2, 3, and 4) applicable
80 [550] not
applicable
HSLAS 40 [275] 2t
50 [340] 21⁄2 t
60 [410] 3t
70 [480] 4t
80 [550] 41⁄2 t
HSLAS-F 40 [270] 11⁄2 t
50 [340] 2t
60 [410] 2t
70 [480] 3t
80 [550] 3t
A
Material that does not perform satisfactorily, when fabricated in accordance with
the requirements in this table, may be subject to rejection pending negotiation with
the steel supplier.
B
Bending capability may be limited by coating designation.

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A1046/A1046M − 14

SUMMARY OF CHANGES

Committee A05 has identified the location of selected changes to this standard since the last issue
(A1046/A1046M - 10aε1) that may impact the use of this standard. (May 1, 2014)

(1) Added coating designations ZM50, ZM75, ZM100, (3) The measure for thickness requirements has been corrected
ZMM150, ZMM210, and ZMM300 to Table 1. in Section 5.1.
(2) Added coating designations ZM50, ZM75, ZM100,
ZMM150, ZMM220, and ZMM300 to Table 6.

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