Ally 926 UNS N08926 1.4529 Super Austenitic Nickel Alloy Flange ASTM B649 for Offshore Chemical Equipment
1.Product Attributes
| Attribute |
Detail |
| Grade |
Dingsco Alloy 926 |
| UNS Designation |
N08926 |
| W.Nr Designation |
1.4529 |
| Type |
Super Austenitic Stainless Steel |
| Product Form |
Flange (Weld Neck, Slip-On, Blind, Socket Weld, Threaded) |
| Density |
8.1 g/cm³ |
| Melting Range |
1320-1390 ℃ |
| Standards |
ASTM B649, B673, B674, B677, B625, ASME Code Case N453, N454 |
| Certification |
VdTÜV-196 (400℃), ASME, ISO 9001:2015, PED 2014/68/EC, API 6A |
2.Material Overview
Alloy 926 (Dingsco Alloy 926) is a super-austenitic molybdenum stainless steel that exhibits excellent resistance to a variety of highly corrosive environments. The combination of molybdenum (6.0-7.0%) and nitrogen (0.15-0.25%) in its composition provides outstanding resistance to pitting and crevice corrosion, while copper (0.5-1.5%) improves sulfuric acid resistance. Nitrogen addition also enhances yield and tensile strengths. Compared with Dingsco Alloy 1925 LC-Alloy 904L, Alloy 926 offers notably improved mechanical properties and greatly enhanced thermal stability versus alloys with 18% nickel content in the same series.
3.Chemical Composition (Wt.%)
| Element |
Min |
Max |
| Ni |
24.0 |
26.0 |
| Cr |
19.0 |
21.0 |
| Mo |
6.0 |
7.0 |
| Cu |
0.5 |
1.5 |
| N |
0.15 |
0.25 |
| C |
-- |
0.02 |
| Mn |
-- |
2.0 |
| Si |
-- |
0.5 |
| P |
-- |
0.03 |
| S |
-- |
0.01 |
| Fe |
Balance |
4.Physical Properties
| Property |
Value |
| Density |
8.1 g/cm³ |
| Melting Range |
1320-1390 ℃ |
| Specific Heat Capacity (20℃) |
500 J/kg*K |
| Thermal Conductivity (20℃) |
12.0 W/m*K |
| Electrical Resistivity (20℃) |
0.97 μΩ*m |
| Modulus of Elasticity (20℃) |
195 GPa |
| Poisson's Ratio |
0.31 |
5.Mechanical Properties (Room Temperature, Solution Annealed)
| Property |
Value |
| Tensile Strength (Rm) |
650 N/mm² |
| Yield Strength (Rp0.2) |
295 N/mm² |
| Elongation (A5) |
35 % |
| Brinell Hardness (HB) |
≤ 230 |
| Impact Energy (ISO-V) |
≥ 100 J (RT) |
6.Corrosion Resistance -- CPT / CCT Comparison
| Alloy Grade |
PREn (PREN) |
CPT (°C) |
CCT (°C) |
| 316L (1.4404) |
25 |
15 |
＜0 |
| 904L (1.4539) |
36 |
40 |
20 |
| Alloy 28 (1.4563) |
39 |
50 |
30 |
| Alloy 926 (1.4529) |
47 |
70 |
45 |
| Alloy 31 (1.4562) |
54 |
85 |
65 |
| Alloy 625 (2.4856) |
52 |
90 |
70 |
* PREn = %Cr + 3.3 * %Mo + 16 * %N; CPT/CCT tested per ASTM G48 in 6% FeCl₃ solution.
7.Material Characteristics
- Exhibits excellent resistance to pitting and crevice corrosion in oxidizing media and acidic environments containing H₂S
- Effectively resists chloride-induced stress corrosion cracking (SCC) in practical service conditions
- Provides outstanding corrosion resistance in both oxidizing and reducing environments
- Mechanical properties are notably improved compared with Dingsco Alloy 1925 LC-Alloy 904L
- Thermal stability is greatly enhanced versus alloys with 18% nickel content in the same series
- Certified for pressure vessel manufacturing -- VdTÜV-196 (up to 400℃) and ASME certification
- PREn value of 47 provides superior pitting resistance in aggressive chloride environments
- Good weldability using matching filler metals; suitable for GTAW, SMAW, and SAW processes
8.Product Image Gallery
9.Delivery State & Forms
| Product Form |
Description |
| Bar / Rod / Wire |
Round, square, hexagonal bars; wire in coils or spools |
| Forging |
Discs, rings, shafts, flanges, custom forgings as per drawing |
| Pipe / Tube |
Seamless and welded; OD 6-610 mm, WT 0.5-50 mm |
| Plate / Sheet / Strip |
Hot rolled / cold rolled; thickness 0.3-100 mm |
| Flange |
Weld Neck, Slip-On, Blind, Socket Weld, Threaded, Lap Joint -- ANSI B16.5 / EN 1092-1 |
| Fittings |
Elbow, tee, reducer, cap, stub end -- butt weld / threaded / socket weld |
10.Typical Applications
- Fire protection systems, seawater purification systems, hydraulic and injection pipeline systems for marine engineering
- Bleach plants in cellulose production
- Polished bars for oil & gas wells
- Tubing systems for offshore engineering platforms
- Pipes, flanges and gas pipeline systems in acidic gas (sour) service
- Components for flue gas desulfurization (FGD) systems
- Evaporators, heat exchangers, filters and mixing tanks in salt production
- Cooling and condensation systems for sulfuric acid processes
- Evaporators for brine concentration and crystallization
- Piping and pipeline systems in power plant circulating cooling water units
- Container packages for transporting corrosive chemicals
- Organic biological production with acidic oxide catalysts
- Leaching extraction plants in hydrometallurgy
11.DINGSCO -- Professional Nickel Alloy Manufacturer
DINGSCO is a leading manufacturer and supplier specializing in high-performance nickel alloys, super austenitic stainless steels, and corrosion-resistant materials. With decades of metallurgical expertise, we serve customers across the oil & gas, marine engineering, chemical processing, power generation, and desalination industries worldwide.
| Certification |
Scope |
| ISO 9001:2015 |
Quality Management System -- full traceability from melt to finished product |
| PED 2014/68/EC |
Pressure Equipment Directive -- certified for pressure vessel components |
| API 6A |
Wellhead and Christmas Tree Equipment -- certified for oil & gas upstream applications |
QUALITY ASSURANCE: Our mission is to provide our customers only with the best quality products. As an ISO 9001:2015, PED 2014/68/EC, API 6A certified manufacturer, we enforce strict quality control at every production stage -- from raw material inspection to final dimensional verification.
SCIENCE AND TECHNOLOGY INNOVATION STRATEGY: We pay close attention to customer needs, implement product innovation, and further leverage the company's full range of product types and material grades to provide customers with one-stop service. Continuous improvement drives our material, process, and equipment optimization.
COOPERATION: We are pleased to help others and glad to acquire the hand of others. We actively participate in team collaboration and support decision-making. We share our experience with each other and excel at cooperating with different types of colleagues across global supply chains.
12.Material Selection -- Other Available Grades
| Alloy |
UNS |
W.Nr |
Key Feature |
| Alloy 904L |
N08904 |
1.4539 |
Standard super austenitic, good general corrosion resistance |
| Alloy 28 |
N08028 |
1.4563 |
Higher Mo content for enhanced pitting resistance |
| Alloy 926 ★ |
N08926 |
1.4529 |
Optimal balance of Mo+N+Cu -- PREn 47 |
| Alloy 31 |
N08031 |
1.4562 |
Higher Mo+N for extreme oxidizing/reducing environments |
| Alloy 625 |
N06625 |
2.4856 |
Nickel-based solid-solution strengthened, excellent fatigue resistance |
| Alloy C-276 |
N10276 |
2.4819 |
Universal corrosion resistance in severe oxidizing/reducing media |
| Alloy C-22 |
N06022 |
2.4602 |
Superior resistance to oxidizing acids and mixed acids |
| Incoloy 825 |
N08825 |
2.4858 |
Ni-Fe-Cr-Mo-Cu alloy for general corrosion and SCC resistance |
| Alloy 254 SMO |
S31254 |
1.4547 |
High-Mo super austenitic with PREn ≥ 43 |
★ Currently selected material. We offer a full portfolio of grades; please contact us for alternative alloy recommendations.
13.Customized Products
DINGSCO provides comprehensive customization services to meet exact customer specifications:
| Customization Option |
Capability |
| Non-Standard Sizes |
Manufactured to customer drawings and specifications; OD, WT, and length per requirements |
| Special Flange Types |
Orifice flanges, spectacle blinds, long weld neck, reducing flanges, RTJ face |
| Surface Treatment |
Pickling, passivation, electro-polishing, shot blasting, machining finish |
| Testing & Inspection |
PMI, UT, RT, PT, MT, hydrostatic test, IGC (ASTM A262), ferrite measurement |
| Documentation |
EN 10204 3.1 / 3.2 MTC, NACE MR0175/ISO 15156, NORSOK M-650 |
| Third-Party Certification |
DNV, BV, LR, ABS, SGS, TÜV -- per project requirements |
Payment & Shipping Terms
| Term |
Detail |
| Minimum Order Quantity |
Negotiable |
| Price |
Negotiable |
| Packaging Details |
According to Customers' Requests |
| Delivery Time |
7 days (Sample Order) |
| Payment Terms |
T/T |
| Supply Ability |
Negotiable |
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