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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ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned aetm this standard. The primary reason for this is the priority that we give to complete satisfaction of the customer. The outside diameter at the point of grinding may be reduced by the amount so removed. More or smaller reference discontinuities, or both, may be used by agreement between the purchaser and the asm.

If, by any chance however small it may bethe products fail to satisfy the customers, we act on our product replacement scheme to ensure that they receive better. It is highly suitable for usage in marine environments.

The length of the x790 shall be compatible with the testing method. Historical Version s – view previous versions of standard. These supplementary requirements call for additional tests to be made and, when desired, one or more of these may be specified in the order. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or astmm phonefaxor service astm.


The width of the notch shall not exceed twice the depth. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.

ASTM A ASTM SA Duplex Steel Seamless Tubing Tubes India – Citizen Metals

The Class Number dictates how the pipe is welded and what non-destructive tests:. Duplex is a nitrogen enhanced duplex stainless steel that was developed to combat common corrosion problems encountered with the series stainless steels.

Other 4 nondestructive tests may be applied to the end areas, subject to agreement between the purchaser and the s790. Pipe shall be double welded by processes employing filler metal in all passes.

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It is informational only and not an official part of the standard; the full text of the standard itself must be a79 to for its use and application. The dimensions of these standards should not be construed as the minimum size imperfection detectable by such equipment. Referenced Documents purchase separately The documents a709 below are referenced within the subject standard but are not provided as part of the standard.

The inch-pound units shall apply unless the M designation of this specication is specied in the order.

ASTM A790 Standard for Duplex Stainless Steel Pipe

These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures. Combining values from the two systems qstm 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. Pipe shall be welded in one pass by processes employing filler metal and shall be completely radiographed. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other.


No radiography is required. 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 sstm to develop specific properties.

ASTM A790 Seamless and Welded Pipe

Usually use Pitting Corrosion Test. Hydrostatic or Nondestructive Electric Test 7a90 The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.

It appears that you have disabled your Javascript. It should be recognized that different techniques should be employed to detect differently oriented imperfections. ASME SA Ferritic Stainless Steel Welded Pipes has a higher yield a709 and lower ductility than the austenitic steels so fabricators may find that higher forming forces, increased radius of bending, and increased allowance for spring back are necessary. A number in parentheses indicates the year of last reapproval.

Within the text, the SI units are shown in brackets.