STEEL PIPE FITTINGS 90°LR ELBOW ERW SMLS B366 ASTM B16.9 N08367
AL6XN
Applications for superaustenitic stainless steel alloy AL-6XN
include chemical processing, oil and gas, medical – sterilization
and power generation with specific applications identified in
desalination, water piping systems. transformer cases in marine
environments, food processing equipment, FGD scrubbers,reserse
osmosis, and heat exchangers.
We are engaged in manufacturing of a wide range of Butt Weld
Fitting that is available in varied types such as L/R & S/R elbow,
tee, concentric and eccentric reducers, reducing elbow & tee, cross
and caps. Sourced from reliable vendors, these fittings are highly
acknowledged for their high tensile strength, durability and
accurate alloy composition. These find application in several
industries such oil & gas, automobile, acid & chemical,
pharmaceutical and cement industries. We are known for our butt
welding fitting pieces.
Sizes : 1/2" NB - 48" NB
Wall Thickness Available : Schedule 10s - Schedule XXS
Dimension Standard: ANSI B16.9, MSS SP 43
Seamless, ERW, Fabricated
FORM:
- Elbows in Long & Short Radius in 45 deg, 90 deg, 180 deg.
- Return Bend, U Bend, Long Radius Bend.
- Equal, Unequal Tee & Barred Tee.
- Eccentric Reducer & Concentric Reducer.
- Caps & Crosses.
- Long & Short Stub End.
- Swage Nipple & Barrel Nipple
- Laterals
AL6XN Overview
AL6XN is a superaustenitic 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.
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 | Si | P | S | Cu | Fe |
| 23.5-25.5 | 20.00-22.00 | 6.00-7.00 | 0.03 Max | 0.18-0.25 | 2.0 Max | 1.00 Max | .040 Max | 0.03 Max | 0.75 Max | Remainder |
Applications
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 | B366, A182 |
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 | - |
