ASTM B462 N08367 Supper Austenitic Stainless Steel Forged Flange WNRF
ASTM B462 N08367 Supper Austenitic Stainless Steel Forged Flange WNRF
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ASTM B462 UNS N08367 is a super austenitic stainless steel with excellent resistance to chloride pitting, crevice corrosion and stress corrosion cracking. N08367 is a 6-molybdenum alloy developed for and used in highly corrosive environments. Its high nickel (24%), molybdenum (6.3%), nitrogen and chromium contents give it excellent resistance to chloride stress corrosion cracking, chloride pitting and excellent general corrosion resistance. N08367 is mainly used to improve its resistance to pitting and crevice corrosion in chlorides. It is a formable and weldable stainless steel.
Corrosion Resistance
Chromium, molybdenum, nickel and nitrogen all contribute to overall resistance to corrosion by various media. Chromium is the primary agent for imparting corrosion resistance in neutral or oxidizing environments. Chromium, molybdenum and nitrogen increase resistance to pitting corrosion. Nickel imparts an austenitic structure. Both nickel and molybdenum provide higher resistance to chloride stress corrosion cracking in reducing environments.
Specification
| Form | Standard |
| Metal Type | UNS N08367 |
| Bar | ASTM B691 / ASME SB691 |
| Wire | ASTM B691 / ASME SB691 |
| Sheet | ASTM B688, A240 / ASME SB688 SA240 |
| Plate | ASTM B688, A240 / ASME SB688 SA240 |
| Tube | ASTM B676 WELDED |
| Pipe | ASTM B675 WELDED |
| Fitting | ASTM B366 / ASME SB366 / ASTM B462 / ASME SB462 |
| Forging | ASTM B472 / ASTM B462 / ASME SB462 |
| Weld Wire | 622, 686 or 625 |
| Weld Electrode | Inconel 112, 122 or INCOWELD 686CPT |
Characteristic
- PREN 48.3 Typical for ASTM G48, CPT per G48-C 75C, CCT per G48-D 35C
- Density 0.290 Lbs/cubic inch
- Magnetic permeability 1.003 (200 Oersteds at Room Temp)
- Coefficient of thermal expansion (68-212F) 8.49x10 in/in Deg F
- Higher strength than conventional austenitic grades (304/316)
B462 N08367 Chemical Composition
| Grade | N08367 |
| Ni | 23.5-25.5 |
| Cr | 20.00-22.00 |
| Mo | 6.00-7.00 |
| C | 0.03 Max |
| N | 0.18-0.25 |
| Mn | 2.0 Max |
| Si | 1.00 Max |
| P | 0.40 Max |
| S | 0.03 Max |
| Cu | 0.75 Max |
| Fe | Rem |
B462 N08367 Mechanical Properties
| Temp. °F (°C) | Tensile Strength, psi | 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 | – |
Application
- Marine enviroments
- Desalination systems
- Flue gas desulfurization equipment
- Reaction vessels for pharmaceutical production
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