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UNS N08367 ASTM B 688, B 691, B 675 / 676 B 462, B 366, B 564, B 804 Forms of AL-6XN Available at Mega Mex Sheet
Plate
Bar
Pipe & Tube (welded & seamless)
Fittings (i.e. flanges, slip-ons, blinds, weld-necks, lapjoints, long welding necks, socket welds, elbows, tees, stub-ends, returns, caps, crosses, reducers, and pipe nipples)
AL6XN Overview
AL6XN is a super austenitic stainless steel with outstanding resistance to chloride pitting, crevice corrosion and stress corrosion cracking. AL6XN is a 6 moly alloy that was developed for and is used in highly aggressive environments. It has high nickel (24%), molybdenum (6.3%), nitrogen and chromium contents that give it excellent resistance to chloride stress corrosion cracking, chloride pitting, and exceptional general corrosion resistance. AL6XN is primarily used for its improved pitting and crevice corrosion resistance in chlorides. It is a formable and weldable stainless steel.
Because of its nitrogen content, AL6XN has greater tensile strength than common austentitic stainlesses, while retaining high ductility and impact strength.
Corrosion Resistance
Chromium, molybdenum, nickel and nitrogen all contribute to overall resistance to corrosion by various media. Chromium is the principal agent for conferring corrosion resistance in neutral or oxidizing environments. Chromium, molybdenum and nitrogen increase resistance to pitting corrosion. Nickel imparts the austenitic structure. Nickel and molybdenum both provide increased resistance to chloride stress corrosion cracking in reducing environments.
What are the characteristics of AL-6XN?
Excellent resistance to pitting and crevice corrosion in chloride solutions
Practical immunity to stress corrosion in NaCl environments
High Strength and toughness -
Chemical Composition, %
Ni
Cr
Mo
C
N
Mn
23.5-25.5
20.00-22.00
6.00-7.00
0.03 Max
0.18-0.25
2.0 Max
Si
P
S
Cu
Fe
1.00 Max
.040 Max
0.03 Max
0.75 Max
Remainder
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In what applications is AL-6XN used?
Reverse osmosis desalination equipment and pumps
FGD Scrubbers
Chemical process tanks and pipelines
Seawater heat exchangers
Tall oil distillation columns and packing
Offshore oil and gas production equipment
Pulp bleaching plant washers, vats, press rolls and pipelines -
ASTM Specifications
Pipe Welded
Tube Welded
Sheet/Plate
Bar
Flanges & Fittings
B675, A312
B676, A249
B688, A240
B691, A479
B462, A182
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Mechanical Properties Representative Tensile and Impact Properties, Plate
Temp. °F (°C)
Ult. Tensile Strength, psi
.2% Yield Strength, psi
Elongation in 2”, percent
Charpy V-Notch Toughness, ft-lb
-450 (-268)
218,000
142,000
36
353*
-320 (-196)
196,000
107,000
49
85
-200 (-129)
-
-
-
100
70 (21)
108,000
53,000
47
140
200 (93)
99,900
49,400
47
-
400 (204)
903,000
40,400
46
-
600 (316)
86,000
36,300
47
-
800 (427)
87,000
36,000
48
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* AL-6XN® is a registered trademark of the Allegheny Ludlum Corporation
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Alloy
ASTM
DIN
Nitronic 50
UNS S20910
Nitronic 60
UNS S21800
Alloy 20
UNS N08020
2.4660
Alloy 28
UNS N08028
1.4563
Sanicro 28
UNS N08028
1.4563
Alloy 31
UNS N08031
1.4562
Alloy 59
904L
UNS N08904
1.4539
253 MA
UNS S30815
254 SMO
UNS S31254
1.4547
AL-6XN
1.4529
F55(S32760)
UNS S32760
1.4501
F53(2507)
UNS S32750
1.4410
F51(2205)
UNS S31803
1.4462
F60(2205)
UNS S32550
329(SUS329J4L)
UNS S32900
2304
1.4362
80NI-20CR
660
1.4980
Temp. °F (°C)
Ult. Tensile Strength, psi
.2% Yield Strength, psi
Elongation in 2”, percent
Charpy V-Notch Toughness, ft-lb
-450 (-268)
218,000
142,000
36
353*
-320 (-196)
196,000
107,000
49
85
-200 (-129)
-
-
-
100
70 (21)
108,000
53,000
47
140
200 (93)
99,900
49,400
47
-
400 (204)
903,000
40,400
46
-
600 (316)
86,000
36,300
47
-
800 (427)
87,000
36,000
48
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* AL-6XN® is a registered trademark of the Allegheny Ludlum Corporation
- Nickel Based Alloys
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Super Special Stainless
- Duplex 2205/ S31803/1.4462/F51
- Duplex 2507 / S32750 / 1.4410 /F53
- Duplex S32760 / 1.4501 / F55
- 904L / UNS N08904 / 1.4539
- 253 MA / S30815 / 1.4835
- 254 SMO / S31254 /1.4547
- 17-4PH / AISI630 / 1.4542
- AISI 316Ti / 1.4571
- 317L Stainless Steel
- AISI 310MOLN / 1.4466 Stainless Steel
- 347/347H 1.4550 Stainless Steel
- UNS N08367 / AL-6XN® / 1.4529
- Stainless Steel
- Alloy Steel
- TITANIUM AND TITANIUM ALLOYS