ASTM A1076/A1076M-12

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:A1076/A1076M −12
StandardSpecification for
Cold Formed Carbon Structural Steel Tubing Made from
Metallic Precoated Sheet Steel
This standard is issued under the fixed designation A1076/A1076M; 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 A924/A924M Specification for General Requirements for
Steel Sheet, Metallic-Coated by the Hot-Dip Process
1.1 This specification covers round, square, rectangular, and
special shape, electric-resistance-welded structural tubing pro-
3. Terminology
duced from precoated sheet steel with the following coatings
on both sides: zinc (galvanized) or 55% aluminum-zinc alloy. 3.1 Definitions—See Terminology A902 for definitions of
This product is intended for applications requiring minimum general terminology relating to metallic-coated hot-dip prod-
mechanical properties and corrosion resistance of both exterior ucts.
and interior surfaces.
3.2 Definitions of Terms Specific to This Standard:
1.2 This specification is applicable to orders in either 3.2.1 de-dimpled, adj—the condition of the end of tubing
inch-pound units (as A1076) or SI units (as A1076M). Within after removal of the protrusion or deformation created by the
the text, SI units are shown in brackets. The values stated in punch cut operation.
eitherSIunitsorinch-poundunitsaretoberegardedseparately 3.2.1.1 Discussion—The dimple is a protrusion that is dis-
placedfromtheinsidediameterandisunrelatedtoashearburr.
as standard. The values stated in each system may not be exact
equivalents;therefore,eachsystemshallbeusedindependently
3.2.2 structural tubing, n—tubing tension tested with re-
of the other. Combining values from the two systems may
ported test results.
result in non-conformance with the standard.
4. Product Size
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4.1 The standard covers products available in the following
responsibility of the user of this standard to establish appro-
sizes:
priate safety and health practices and determine the applica-
Wall Thickness, Exterior Dimension,
Product
bility of regulatory limitations prior to use.
max max
Round Tubing 0.25 in. [6.35 mm] Diameter – 5 in. [130 mm]
2. Referenced Documents
Square, 0.25 in. [6.35 mm] Periphery – 16 in. [405 mm]
2 Rectangular, or
2.1 ASTM Standards:
Special Shapes
A90/A90M Test Method for Weight [Mass] of Coating on
Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
5. Classification
A370 Test Methods and Definitions for Mechanical Testing
5.1 The finished tube is available in the following designa-
of Steel Products
tions:
A902 Terminology Relating to Metallic Coated Steel Prod-
5.1.1 Round structural tubing steel grade with minimum
ucts
yield strength 33 ksi [230 MPa], 42 ksi [290 MPa], and 46 ksi
A500/A500M Specification for Cold-Formed Welded and
[315 MPa] in the finished tube.
Seamless Carbon Steel Structural Tubing in Rounds and
5.1.2 Shaped structural tubing steel grade with minimum
Shapes
yield strength 39 ksi [270 MPa], 46 ksi [315 MPa], and 50 ksi
[345 MPa] in the finished tube.
5.1.3 The finished tube is available as zinc-coated or 55%
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
aluminum-zinc alloy-coated with a recommended minimum of
A01.09 on Carbon Steel Tubular Products. 2 2
0.40 oz/ft [120 g/m ] total both sides.
Current edition approved July 1, 2012. Published September 2012. DOI:
10.1520/A1076_A1076M-12.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 6. Ordering Information
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.1 The ordered wall thickness of the tubing shall be the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. total of the base metal and the metallic coating.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
A1076/A1076M−12
6.2 Orders for product to this specification shall include the The thickness of the tube includes both the base metal and the
following information, as necessary, to adequately describe the coating.
desired product. 7.1.2 Use the following relationships to estimate the coating
6.2.1 Steel grade designation, thickness from the coating weight [mass]:
6.2.2 Chemically treated or not chemically treated raw 7.1.2.1 1 oz/ft coating weight = 1.7 mils coating thickness
material, 7.1.2.2 7.14 g/m coating mass=1µm coating thickness
6.2.3 Coating designation,
7.2 55% Aluminum-Zinc Coating Weight [Mass]:
6.2.4 Organic or inorganic coating if required,
7.2.1 Coating weight [mass] shall conform to the require-
6.2.5 Oiled or dry,
ments as shown in Table 2 for the specific coating designation.
6.2.6 End condition,
7.2.2 Use the following relationships to estimate the coating
6.2.6.1 Burrs removed if required,
thickness from the coating weight [mass]:
6.2.7 Mill cut or de-dimpled end condition,
7.2.2.1 1 oz/ft coating weight = 3.2 mils coating thickness
6.2.7.1 When the end finish is not specified, mill cut will be 2
7.2.2.2 3.75 g/m coating mass=1µm coating thickness
furnished,
7.3 Coating Weight To Coating Mass Conversion:
6.2.8 Dimensions (show outside diameter and wall thick-
2 2
7.3.1 1 oz/ft coating weight = 305.15 g/m coating mass
ness for round tubing), (outside dimensions and wall thickness
for square, rectangle, or special shapes), and length, 7.4 Coating Weight [Mass] Tests:
6.2.9 Quantity (length or weight),
7.4.1 Coating weight [mass] tests shall be performed in
6.2.10 Mill certification (if required), accordance with the requirements of Specification A924/
6.2.11 End-use application, and
A924M.
6.2.12 Recoating of outside diameter weld and heat-affected 7.4.2 The referee method to be used shall be Test Method
area of coating, if required.
A90/A90M.
7. Coating Properties 8. Chemical Composition
7.1 Zinc Coating Weight [Mass]: 8.1 Base Metal:
7.1.1 Coating weight [mass] shall conform to the require- 8.1.1 The base metal shall be manufactured using the basic
ments as shown in Table 1 for the specific coating designation. oxygen or electric furnace process.
A
TABLE 1 Weight [Mass] of Zinc Coating Requirements
NOTE 1—Use the information provided in 7.1.2 to obtain the approximate coating thickness from the coating weight [mass].
B
Minimum Requirement
Triple-Spot Test Single-Spot Test
Inch-Pound Units
2 2
Type Coating Designation Total Both Sides, oz/ft One Side Total Both Sides, oz/ft
Zinc G235 2.35 0.80 2.00
G210 2.10 0.72 1.80
G185 1.85 0.64 1.60
G165 1.65 0.56 1.40
G140 1.40 0.48 1.20
G115 1.15 0.40 1.00
G100 1.00 0.36 0.90
G90 0.90 0.32 0.80
G60 0.60 0.20 0.50
G40 0.40 0.12 0.30
G30 0.30 0.10 0.25
G01 no minimum no minimum no minimum
SI Units
2 2
Type Coating Designation Total Both Sides, g/m One Side Total Both Sides, g/m
Zinc Z700 700 238 595
Z600 600 204 510
Z550 550 190 475
Z500 500 170 425
Z450 450 154 385
Z350 350 120 300
Z305 305 110 275
Z275 275 94 235
Z180 180 60 150
Z120 120 36 90
Z90 90 30 75
Z001 no minimum no minimum no minimum
A
The coating designation number is the term by which this product is specified. Because of the many variables and changing conditions that are character
...