Zhengzhou Huitong Pipeline Equipment Co.,Ltd.
Zhengzhou Huitong Pipeline Equipment Co., Ltd.
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ASTM B690 Standard Specification for Iron-Nickel-Chromium-Molybdenum Alloys (UNS N08366 and UNS N08367) Seamless Pipe and Tube
| Standard | ASTM B690 |
| Material | UNS N08367 |
| Equivalent Materials | 00Cr20Ni24Mo6N, AL6XN, AL6XN plus(ATI) |
| C % | Mn % | P % | S % | Si % | Cr % | Ni % | Mo % | N % | Cu % |
| 0.03 max | 2.00 max | 0.040 max | 0.030 max | 1.00 max | 20.0-22.0 | 23.5-25.5 | 6.00-7.00 | 0.18-0.25 | 0.75 max |
| Tensile Strength, Mpa | Yield Strength, MPa | Elongation, % | |
| 670 min | 310 min | 30 min | WT<=0.187″ |
| 655 min | 310 min | 30 min | WT>=0.187″ |
Forms of AL-6XN
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 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.
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 | 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 |
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 |
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 | - |
