Alloy AL-6XN Technical Information
Robert-James Sales, Inc.
Robert-James Sales, Inc.
Technical Information
  Piping Definitions Tube Stainless Steel Alloys Specifications Conversion Calculators 

 
Alloys

Alloy 20
2205
Alloy C-276
317L
310S
321/321H
347/347H
254SMO
AL-6XN
6061 T6
904L
410
304/304L
316/316L
Alloy 200
Alloy 400
Alloy 600
Alloy 625
Alloy 800/800H/800HP
Alloy 825

AL-6XN

Chemical Composition %

C Mn P S Si Cr Ni Mo N Cu Fe
0.02 0.40 0.025 0.002 0.40 20.5 24.0 6.3 0.22 0.1 Balance

GENERAL PROPERTIES
The AL-6XN alloy is a superaustenitic stainless steel which was developed by Allegheny Ludlum Corporation. It exhibits far greater resistance to chloride pitting, crevice corrosion and stress-corrosion cracking than exhibited by the standard 300 series stainless steels, and is less costly than the traditional nickel-base corrosion resistant alloys.

The AL-6XN alloy has exhibited good performance in variety of highly corrosive environments. The AL-6XN alloy is available in a wide range of product forms including plate, strip, sheet, bar, billet, tubing, pipe, and castings. Its various product forms are covered by ASME and ASTM specifications. The use of wrought AL-6XN products in the ASME Boiler and Pressure Vessel is covered by Code Case 1997 (latest revision) for Section VIII construction and by Code Case N-438 (latest revision) for Section III construction. The use of AL-6XN castings is covered by Code Case 2106 (latest revision) for Section VIII and Code Case 497 (latest revision) for Section III construction. The alloy is approved for both welded and unwelded construction under ANSI/ASME B31.1 Code Case 155. Use of AL-6XN alloy in contact with hydrogen sulfide-containing petroleum and natural gas is covered by NACE MR0175-92.

PRODUCT FORMS & SPECIFICATIONS

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