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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Duplex Steel Sheet Plates Manufacturers Within the text, the SI units are shown in brackets. Work Item s – proposed revisions of this standard.

Mega Mex supplies LDX,FerraliumZeron and in the form x790 plate, sheetstrip, bar, pipe, tubing, pipe fittings, flanges and weld wire.

ASTM A790 Seamless and Welded Pipe

Pipe shall be double welded by processes employing filler metal in all passes and shall be completely radiographed. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Transverse Tension Tests S2. No pipe shall be less than the specied length and no more than 14 in. A rejection rate of less than one percent has consolidated the claim.

ASTM A790 Standard for Duplex Stainless Steel Pipe

Pipe having other dimensions may be furnished provided such astn complies with all other requirements of this specication. Technically, then, tool and stainless steels are alloy steels however, ASTM A Austenitic Duplex Stainless Steel Seamless Pipes is reserved for those steels that contain a modest amount of alloying elements and that usually depend on thermal treatment to develop specific properties.

Subject to agreement between the purchaser and manufacturer, retest and retreatment provisions of these supplementary requirements may also wstm modied.

On specied walls up to 0. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Link to Active This link will always route to the current Active version of the standard. 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.


Duplex Steel Products: Combining values from the two systems may result in non-conformance with the standard. Usually use Pitting Corrosion Test.

The pipe shall be made by the seamless or an automatic asrm process, with no addition of filler metal in the welding operation. Duplex is a nitrogen enhanced duplex stainless steel that was developed to combat common corrosion problems encountered a709 the series stainless steels.

Often referred to as the work horse grade, is the most widely used grade in the duplex family of stainless steels. The Class Number dictates how the pipe is welded and what non-destructive tests:.

The inch-pound units shall apply unless the M designation of this specication is specied in the order. Heat analysis shall be made to determine the percentages of the elements specified. Pipe having other dimensions may be furnished provided such pipe complies with all other requirements of this specification.

– Buy and Sell Project Materials

Filler metal not permitted during welding. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Tension test s, hardening tests, flattening tests, hydrostatic test and nondestructive electric tests shall be made to conform to the specified requirements.

Combining values from the two systems may result in nonconformance with the specification. If the equipment contains a reject notice lter setting, this shall remain off during calibration and testing unless linearity can be demonstrated at that setting.


These supplementary requirements call for additional tests to be made and, when desired, one or more of these may be specified in the order. The methods used for cleaning and preparing the surfaces for examination shall not be detrimental to the base metal or the surface nish. High quality exotic piping products from approved manufacturers: The pipe shall be made by the seamless or an automatic welding process, with no addition of filler metal in the welding operation. NOTE 2—This value applies when the inch-pound designation of this specication is the basis of purchase.

ASTM A Seamless Pipe, ASTM A Welded Pipe, ASTM AM Duplex Pipes.

Home Contact Us Back to Top. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn. It is highly suitable for usage in marine environments. The purchaser may specify a different frequency of test or analysis than is provided in the supplementary requirement. Optional supplementary requirements are provided for pipe when a greater degree of testing is desired.

Duplex Steel Flangesand Grades. Etching tests shall be made on a cross section from one end or both ends of each pipe and shall show sound and reasonably uniform material free of injurious laminations, cracks, and similar objectionable defects.

This requirement does not preclude additional a7900 at earlier stages in the processing. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Crops ends may be used. The length of the notch shall be compatible with the testing method.