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ASTM A1055/A1055M-08a

Historical Revision

Standard Specification for Zinc and Epoxy Dual-Coated Steel Reinforcing Bars

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1.1 This specification covers deformed and plain steel reinforcing bars with a dual coating of zinc alloy and an epoxy coating. The zinc-alloy layer is applied by the thermal spray coating method (metallizing) followed by an epoxy coating applied by the electrostatic spray method.

Note 1—The coating applicator is identified throughout this specification as the manufacturer.

1.2 Requirements of the zinc coating are contained in Table 1.

1.3 Requirements for fusion-bonded powder coatings are contained in Annex A1.

1.4 Guidelines for construction practices at the job-site are presented in Appendix X1.

1.5 This specification is applicable for orders in either inch-pound or SI units.

1.6 The values stated in either inch-pound units or SI units are to be regarded as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other, except as specifically noted in Table 2. Combining values from the two systems may result in nonconformance with this specification.

1.7 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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

TABLE 1 Chemical Composition Requirements for Zinc and Zinc-Alloy Wires

Common Name
(UNS)A
Al,
max
unless noted
Cd,
max
Cu,
max
Fe,
max
Pb,
max
Sn,
max
Sb,
max
Ag,
max
Bi,
max
As,
max
Ni,
max
Mg,
max
Mo,
max
Ti,
max
Zn,
min
Other,
Total max
99.99 ZincB
(Z13005)
0.002C0.0030.0050.0030.0030.001D99.99
99.99 ZincB
(Z15005)
0.010.020.020.020.0399.90.10 total non-Zn
99.995 Zinc
()E
0.0010.0030.0010.0020.0030.00399.9950.005
99.95 Zinc
()
0.010.020.0010.020.030.00199.950.050
99.95 Zinc
()
0.010.0050.70.010.0050.0010.010.010.18991.0
98Zn/2Al
(Z30402)
1.5-2.50.0050.0050.020.0050.0030.100.0150.020.0020.0050.02remainder

A UNS designations were established in accordance with Practice E 527.

B In accordance with ANSI/AWS A5.33.

C The following applies to all specified limits in this table. For the purposes of determining conformance with this specification, an observed value obtained from analysis shall be rounded off to the nearest unit in the last right-hand place of figures used in expressing the limiting value, in accordance with the rounding method of Practice E 29.

D indicates that the element is not applicable.

E () indicates no Unified Numbering System (UNS) designation for this option.

TABLE 2 Bend Test Requirements

A 615, A 706,
or A 996
A 615M, A 706M,
or A 996M
Bend Angle
(After
Rebound,
degrees)
Time to
Completion
max, s
Bar
No.
Mandrel
Diameter
mmA
Bar
No.
Mandrel
Diameter
in.A
33107518015
441310018015
551612518015
661915018015
772217518045
882520018045
992923018045
10103225018045
11113628018045
1417434309045
1823575809045

A Mandrel diameters specified for similar size (shown on the same line) inch-pound bars and metric may be interchanged.


This specification covers deformed and plain steel reinforcing bars with a dual coating of zinc alloy and an epoxy coating. The zinc alloy layer shall be applied by the thermal spray coating method followed by an epoxy coating, which shall be applied by the electrostatic spray method. The zinc coating shall conform to the required chemical composition for aluminum, cadmium, copper, iron, lead, tin, antimony, silver, bismuth, arsenic, nickel, magnesium, titanium, and zinc. The coated steel reinforcing bars shall conform to bend test requirements and to physical properties such as coating thickness, coating continuity, epoxy coating flexibility, and coating adhesion.


SDO ASTM: ASTM International
Document Number A1055
Publication Date Oct. 1, 2008
Language en - English
Page Count 9
Revision Level 08a
Supercedes
Committee A01.05
Publish Date Document Id Type View
Sept. 1, 2022 A1055_A1055M-22 Revision
Dec. 1, 2016 A1055_A1055M-16 Revision
Dec. 1, 2010 A1055_A1055M-10E01 Revision
Dec. 1, 2010 A1055_A1055M-10 Revision
Oct. 1, 2008 A1055_A1055M-08AE01 Revision
Oct. 1, 2008 A1055_A1055M-08A Revision