ASTM Standards::} 70 Test Methods and Definitions for Mechanical Testing of Steel Products. 3. Terminology. Definitions—For definitions of terms used. Chemical and mechanical properties of ASTM A duplex and super-duplex pipe materials. What is duplex steel, use cases, corrosion resistance vs. SS. ASTM A/AM: Standard Specification for Seamless and Welded Ferritic/ Austenitic Stainless Steel Pipe.
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This abstract is a brief summary of the referenced standard. The purchaser may specify a different frequency of test or analysis than is provided in the supplementary requirement.
ASTM A ASTM SA Duplex Steel Seamless Tubing Tubes India – Citizen Metals
For seamless pipe, as an alternate to nal heat treatment in a continuous furnace or batch-type furnace, immediately following hot forming while the temperature of the pipes is not less than the specied minimum solution treatment temperature, pipes may be individually quenched in water or rapidly cooled by other means.
Mechanical Tests Required Duplex Stainless Steels Products Manufacturers. Within the text, the SI units are shown in brackets. Combining values from the two systems may result in nonconformance with the specification. Tension test s, hardening tests, flattening tests, hydrostatic test and nondestructive electric tests shall be made to conform to the specified requirements.
The dimensionless designator Nominal Pipe Size nominal pipe size has been substituted in this standard for such traditional terms as nominal diameter, size, and nominal size.
Duplex Steel Sheet Plates Manufacturers The dimensionless designator NPS nominal pipe size has been substituted in this standard for such traditional terms as nominal diameter, size, and nominal size. Seamless austenitic pipe for high temperature applications.
Addition of filler metal is permitted during welding.
Filler metal not permitted during welding. Originally approved in Nondestructive electric tests shall be in accordance with Practice E or E NOTE 2—This value applies when the inch-pound designation of this specication is the basis of purchase.
The Class Number atm how the pipe is welded and what non-destructive tests:. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.
Materials and Manufacture 6. Markings on the Pipe The full identification of the pipe should be continuously marked down its whole length, including:. Notches shall be placed on both the OD and ID surfaces. It should be recognized that different techniques should be employed to detect differently oriented imperfections.
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Duplex stainless steel plate USE: High quality exotic piping products from approved manufacturers: Unless specically called out by the purchaser, the selection of the nondestructive electric test will be at the option of the manufacturer.
Combining values from the two systems may result in nonconformance with the specification. Typically only pipe up to 8 inch is produced to this specification.
Duplex Steel Flangesand Grades. UNS s Pipes Tubes. This resistance is extremely important for services such a709 marine environments, brackish water, bleaching operations, closed loop water systems and some food processing applications. Historical Version s – view previous versions of standard.
Tensile and Hardness Requirements.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Lean Duplex Steel – e. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures. Often referred to as z790 work horse grade, is the most widely used grade in the duplex family of stainless steels.
The inch-pound units shall apply unless the M designation of this specication is specied in the order.
Transverse Tension Tests S2. Duplex Steel Products: Link to Active This link will always route to the current Active version of the standard. This exotic alloy is used in oil and gas exploration, chemical processing industries also make use of this alloy.
ASTM A790 Seamless and Welded Pipe
If specied in the purchase order, the marking for pipe larger than NPS 4 shall include the weight. A970 or smaller reference discontinuities, or both, may be used by agreement between the purchaser and the manufacturer. Combining values from the two systems may result in non-conformance with the standard. Current edition approved Apr.
These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures. The values stated in each system are not exact equivalents; therefore, astj system must be used independently of the other.