Standard Specification for UNS N08367 Welded Tube

ABSTRACT
The specification covers UNS N08367 welded tube of limited diameter and thickness for general corrosion applications. The tube shall be manufactured from flat-rolled alloy by an automatic welding process with no additional filer metal. The tube shall be furnished with oxide removed. The material shall composed of carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, nitrogen, iron, and copper. The tube shall be subjected to the following tests: hydrostatic, pneumatic, eddy current, or ultrasonic test. The material shall also undergo tensile, flattening, flange, reverse-bend, and nondestructive test requirements. Reverse-bend test is not applicable for a specified wall size with respect to outside tube diameter. Nondestructive test includes pressure testing or electric testing. Test results shall show no evidence of cracking or flaws.
SCOPE
1.1 This specification covers UNS N083672 welded tube for general corrosion applications.  
1.2 This specification covers outside diameter and nominal wall tube.  
1.2.1 The tube sizes covered by this specification are 1/8 in. to 5 in. (3.2 mm to 127 mm) in outside diameter and 0.015 in. to 0.320 in. (0.38 mm to 8.13 mm), inclusive, in wall thickness.  
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.4 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 become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
31-Mar-2024

Overview

ASTM B676-19(2024) is an international standard specification developed by ASTM International for UNS N08367 welded tube, catering to general corrosion applications. This specification covers tubes produced from flat-rolled alloy, manufactured via automatic welding without added filler metal. The finished product is delivered with oxide removed, ensuring optimal integrity and surface finish. ASTM B676 defines requirements for tube diameter, wall thickness, mechanical properties, chemical composition, testing, and certification, promoting quality and consistency across applications in corrosive service environments.

Key Topics

  • Product Scope: Defines welded tube sizes from 1/8 inch to 5 inches (3.2 mm to 127 mm) in outside diameter and 0.015 inch to 0.320 inch (0.38 mm to 8.13 mm) in wall thickness.
  • Material Composition: Specifies alloying elements such as carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, nitrogen, iron (balance), and copper.
  • Manufacturing Process:
    • Tubes are made from flat-rolled alloy using an automatic welding process without filler metal.
    • Cold working is applied after welding and before solution treatment.
    • Tubes are supplied with oxide removed for improved performance in corrosive environments.
  • Testing Requirements:
    • Mandatory mechanical tests include tensile, flattening, flange, and reverse-bend tests (with some size-based exceptions).
    • Nondestructive tests or pressure tests (hydrostatic, pneumatic, eddy current, or ultrasonic) are required for each tube.
    • Test results must show no evidence of cracking, flaws, or weld deficiencies.
  • Dimensional Standards: Adopts inch-pound units as standard, with SI conversions provided for information.
  • Certification: Requires manufacturers to provide certification confirming that tubes comply with all specified requirements, accompanied by representative test results.

Applications

UNS N08367 welded tube, as standardized in ASTM B676, offers significant value for a wide range of general corrosion applications, especially in environments demanding resistance to aggressive media. Typical applications include:

  • Chemical processing plants, where exposure to chlorides and acids is routine.
  • Petrochemical and oil & gas industries, for heat exchangers, condenser tubes, and piping exposed to corrosive substances.
  • Power generation environments, including cooling systems and condensers.
  • Desalination plants and marine applications, where enhanced resistance to seawater and brine is critical.
  • Pharmaceutical and food industries, leveraging the alloy’s cleanliness and corrosion resistance for sanitary tube systems.

ASTM B676 ensures that users obtain high-performance welded tube products that consistently meet chemical, mechanical, and dimensional standards, supporting long service life and safety in demanding operating conditions.

Related Standards

The following standards are frequently referenced or associated with ASTM B676-19(2024):

  • ASTM B751 - General Requirements for Nickel and Nickel Alloy Welded Tube: Specifies broader quality and testing requirements applicable to welded tubes, including those made from UNS N08367.
  • ASTM B899 - Terminology Relating to Non-ferrous Metals and Alloys: Provides essential definitions to ensure clarity in specifying and interpreting alloy tube standards.
  • ASTM A1016/A1016M - General Requirements for Ferritic, Austenitic Alloy Steel, and Stainless Steel Tubes: Covers the common testing, inspection, and reporting procedures for tube manufacturing.

By adhering to ASTM B676 and its related standards, manufacturers, engineers, and end-users ensure reliable performance, optimal material selection, and regulatory compliance in corrosion-resistant tube applications.

Keywords: ASTM B676, UNS N08367, welded tube, corrosion resistance, nickel alloy tube, ASTM tube standard, alloy tube specification, mechanical testing, pressure testing, oxide free tube, industrial applications.

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Frequently Asked Questions

ASTM B676-19(2024) is a technical specification published by ASTM International. Its full title is "Standard Specification for UNS N08367 Welded Tube". This standard covers: ABSTRACT The specification covers UNS N08367 welded tube of limited diameter and thickness for general corrosion applications. The tube shall be manufactured from flat-rolled alloy by an automatic welding process with no additional filer metal. The tube shall be furnished with oxide removed. The material shall composed of carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, nitrogen, iron, and copper. The tube shall be subjected to the following tests: hydrostatic, pneumatic, eddy current, or ultrasonic test. The material shall also undergo tensile, flattening, flange, reverse-bend, and nondestructive test requirements. Reverse-bend test is not applicable for a specified wall size with respect to outside tube diameter. Nondestructive test includes pressure testing or electric testing. Test results shall show no evidence of cracking or flaws. SCOPE 1.1 This specification covers UNS N083672 welded tube for general corrosion applications. 1.2 This specification covers outside diameter and nominal wall tube. 1.2.1 The tube sizes covered by this specification are 1/8 in. to 5 in. (3.2 mm to 127 mm) in outside diameter and 0.015 in. to 0.320 in. (0.38 mm to 8.13 mm), inclusive, in wall thickness. 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.4 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 become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ABSTRACT The specification covers UNS N08367 welded tube of limited diameter and thickness for general corrosion applications. The tube shall be manufactured from flat-rolled alloy by an automatic welding process with no additional filer metal. The tube shall be furnished with oxide removed. The material shall composed of carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, nitrogen, iron, and copper. The tube shall be subjected to the following tests: hydrostatic, pneumatic, eddy current, or ultrasonic test. The material shall also undergo tensile, flattening, flange, reverse-bend, and nondestructive test requirements. Reverse-bend test is not applicable for a specified wall size with respect to outside tube diameter. Nondestructive test includes pressure testing or electric testing. Test results shall show no evidence of cracking or flaws. SCOPE 1.1 This specification covers UNS N083672 welded tube for general corrosion applications. 1.2 This specification covers outside diameter and nominal wall tube. 1.2.1 The tube sizes covered by this specification are 1/8 in. to 5 in. (3.2 mm to 127 mm) in outside diameter and 0.015 in. to 0.320 in. (0.38 mm to 8.13 mm), inclusive, in wall thickness. 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.4 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 become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM B676-19(2024) is classified under the following ICS (International Classification for Standards) categories: 23.040.15 - Non-ferrous metal pipes. The ICS classification helps identify the subject area and facilitates finding related standards.

ASTM B676-19(2024) is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: B676 − 19 (Reapproved 2024)
Standard Specification for
UNS N08367 Welded Tube
This standard is issued under the fixed designation B676; 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 B751 Specification for General Requirements for Nickel and
Nickel Alloy Welded Tube
1.1 This specification covers UNS N08367 welded tube for
B899 Terminology Relating to Non-ferrous Metals and Al-
general corrosion applications.
loys
1.2 This specification covers outside diameter and nominal
3. Terminology
wall tube.
1.2.1 The tube sizes covered by this specification are ⁄8 in.
3.1 Terms defined in Terminology B899 shall apply unless
to 5 in. (3.2 mm to 127 mm) in outside diameter and 0.015 in.
otherwise defined in this standard.
to 0.320 in. (0.38 mm to 8.13 mm), inclusive, in wall thickness.
4. General Requirement
1.3 The values stated in inch-pound units are to be regarded
4.1 Material furnished in accordance with this specification
as standard. The values given in parentheses are mathematical
shall conform to the applicable requirements of Specification
conversions to SI units that are provided for information only
B751 unless otherwise provided herein.
and are not considered standard.
1.4 This standard does not purport to address all of the
5. Classification
safety concerns, if any, associated with its use. It is the
5.1 Class 1—Welded, cold worked, solution treated, and
responsibility of the user of this standard to become familiar
each piece of each lot subjected to one of the following four
with all hazards including those identified in the appropriate
tests: hydrostatic, pneumatic (air underwater), eddy current, or
Material Safety Data Sheet (MSDS) for this product/material
ultrasonic.
as provided by the manufacturer, to establish appropriate
5.2 Class 2—Welded, cold worked, solution treated, and
safety, health, and environmental practices, and determine the
each piece of each lot leak tested (hydrostatic or pneumatic)
applicability of regulatory limitations prior to use.
plus electric tested (eddy current or ultrasonic).
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
6. Ordering Information
ization established in the Decision on Principles for the
6.1 It is the responsibility of the purchaser to specify all
Development of International Standards, Guides and Recom-
requirements that are necessary for material ordered under this
mendations issued by the World Trade Organization Technical
specification. Examples of such requirements include, but are
Barriers to Trade (TBT) Committee.
not limited to, the following:
2. Referenced Documents 6.1.1 Alloy name or UNS number,
3 6.1.2 ASTM designation and year of issue,
2.1 ASTM Standards:
6.1.3 Dimensions:
A1016/A1016M Specification for General Requirements for
6.1.3.1 Outside diameter and nominal wall thicknesses,
Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless
Steel Tubes
NOTE 1—Tube produced to outside diameter and minimum wall
thickness may be furnished upon agreement between the manufacturer and
the purchaser.
This specification is under the jurisdiction of ASTM Committee B02 on
6.1.3.2 Length (specific or random),
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.07 on Refined Nickel and Cobalt and Their Alloys.
6.1.4 Class (Section 5),
Current edition approved April 1, 2024. Published May 2024. Originally
6.1.5 Quantity (feet or number of pieces),
approved in 1980. Last previous edition approved in 2019 as B676 – 19. DOI:
6.1.6 Samples for Product (Check) Analysis—State whether
10.1520/B0676-19R24.
samples for product (check) analysis should be furnished, and
New designation established in accordance with Practice E527 and SAE J1086,
Practice for Numbering Metals and Alloys (UNS).
6.1.7 Purchaser Inspection—If the purchaser wishes to
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
witness tests or inspection of material at the place of
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
manufacture, the purchase order must so state indicating which
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. tests or inspections are to be witnessed.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B676 − 19 (2024)
7. Material and Manufacture 9.2 Flattening Test Requirements:
...

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