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1.1 This specification covers steel sheet used in the manufacture of corrugated steel pipe for storm sewers, culverts, drains, and similar uses. The sheet is metallic coated by the hot-dip process. Material for this use is furnished in coils, flat in cut lengths, and corrugated in cut lengths. Many metallic coated materials are covered in this material specification. Users must determine which product best serves their needs. Five different metallic coatings are included:
1.1.1 Zinc-coated (galvanized),
1.1.2 Zinc-5 % aluminum-Mischmetal (Zn-5Al-MM) alloy coated,
1.1.3 55 % aluminum-zinc (55Al-Zn) alloy coated,
1.1.4 Aluminum-coated Type 2 (aluminized Type 2), and
1.1.5 Aluminum-coated Type 1 (aluminized Type 1).
1.2 Zinc-coated sheet is available in two coating weights [masses]. Other metallic coatings are available in one coating weight [mass] only.
1.3 The values stated in either inch-pound units or SI units are to be regarded separately as the standard. Within the text, the SI units are shown in brackets. The values stated in each system are not equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A90/A90M Test Method for Weight [Mass] of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
A428/A428M Test Method for Weight [Mass] of Coating on Aluminum-Coated Iron or Steel Articles
A902 Terminology Relating to Metallic Coated Steel Products
A924/A924M Specification for General Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip Process
B750 Specification for GALFAN (Zinc-5 % Aluminum-Mischmetal) Alloy in Ingot Form for Hot-Dip Coatings
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
ICS Number Code 77.140.50 (Flat steel products and semi-products)
UNSPSC Code 30264000(Carbon steel sheets)