The Incoloy 825 fasteners refer to fasteners that have been made from an alloy material that consists of nickel, iron, and chromium, but with molybdenum, copper, and titanium added. These fasteners are meant to be used in areas that have corrosive conditions such as seawater and acids among others. The alloy offers high resistance to pitting, stress corrosion cracking and reducing and oxidizing environments which ensures continued reliability of the connection in long term service. The fasteners come in the shapes of bolts, nuts, stud bolts, threaded rods, socket head screws, and washers to meet the needs of various industries. Jade Alloys is a manufacturer, stockist and supplier of Incoloy 825 Fasteners in India offering reliable fasteners solutions to chemical processing, oil and gas, marine and other corrosion prone applications.
Specifications of Incoloy 825 Fasteners
| Attribute | Specification Details |
|---|---|
| Material Designation | UNS N08825 / Werkstoff Nr. 2.4858 / Alloy 825 |
| Governing Standards | ASTM B425 / ASME SB425 (Bar, Rod & Fastener Stock)
ASTM B564 / ASME SB564 (Forgings & Forged Fasteners) BS 3076NA16, ISO 9723/9724/9725, VdTÜV 432 |
| Dimensional Standards | ASME B18.2.1, ASME B18.2.2, ISO 4014, ISO 4017, DIN 931, DIN 933, DIN 934, DIN 125 |
| Size Range | Metric: M3 to M90 | Imperial: 1/8″ to 3-1/2″ (Custom sizes on request) |
| Length Range | 10 mm to 1,000 mm (Up to 4 meters for continuous threaded rod) |
| Thread Profiles | UNC, UNF, UNEF, BSW, BSF, ISO Metric Coarse & Fine (Class 2A/2B, 6g/6H) |
| Head & Neck Styles | Hex, Heavy Hex, Flange, Square, Round, Counter Sunk, Socket Cap, T-Head |
| Surface Finish | Passivated, Bright Machined, Electro-Polished, Mill Finish, Custom PTFE/Xylan Coatings |
| Manufacturing Process | Cold Formed, Hot Forged, Precision CNC Machined |
| Certification | EN 10204 3.1 Mill Test Certificate with complete heat traceability |
Chemical Compositions of Incoloy 825 Fasteners
| Element | Ni | Fe | Cr | Mo | Cu | Ti | Mn (max) | Si (max) | C (max) | S (max) |
|---|---|---|---|---|---|---|---|---|---|---|
| Content (%) | 38.00 – 46.00 | 22.00 min (Bal) | 19.50 – 23.50 | 2.50 – 3.50 | 1.50 – 3.00 | 0.60 – 1.20 | 1.00 | 0.50 | 0.05 | 0.03 |
Mechanical Properties of Incoloy 825 Fasteners
| Property | Tensile Strength | Yield Strength (0.2% Offset) | Elongation (in 2″ / 50 mm) | Hardness (Rockwell B) |
|---|---|---|---|---|
| ASTM B425 Requirement | 586 MPa (85 ksi) min | 241 MPa (35 ksi) min | 30% min | 135–200 HBW (75–90 HRB) |
| Typical Measured Value | 650 MPa (94 ksi) | 310 MPa (45 ksi) | 45% | 85 HRB |
Incoloy 825 Fasteners Physical Properties
| Property | Density | Melting Range | Specific Heat (0–100°C) | Electrical Resistivity | Elastic Modulus (Tensile) | Poisson’s Ratio |
|---|---|---|---|---|---|---|
| Value | 8.14 g/cm³ (0.294 lb/in³) | 1,290 – 1,350 °C (2,350 – 2,460 °F) | 444 J/kg·K (0.106 Btu/lb·°F) | 1.13 µΩ·m | 196 GPa (28.4 × 10⁶ psi) | 0.31 |
Different Types of Incoloy 825 Fasteners
Alloy 825 Castle Nuts
Alloy 825 Drywall Screws
Alloy 825 J-Bolts
Alloy Incoloy 825 Socket Set Screws
Alloy Incoloy 825 Wing Nuts
ASME SB425 Structural Washers
ASTM B425 Square Washers
DIN 2.4858 Hanger Bolts
DIN 2.4858 Threaded Cutting Screws
EN 2.4858 Shoulder Bolts
Incoloy 825 Cap Nut
Incoloy 825 Eye Screws
Incoloy 825 Flange Bolts
Incoloy 825 Flat Washers
Incoloy 825 Self Drilling Screws
Incoloy 825 Square Head Bolts
Incoloy 825 Stove Bolts
Incoloy Alloy 825 Hex Jam Nuts
Incoloy Alloy 825 Machine Screws
Inconel 825 Coupling Nuts
Inconel Alloy 825 Keps-K Lock Nuts
NCF 825 Fender Washers
Nickel 825 U-Bolts
Nickel Alloy 825 Heavy Hex Nuts
UNS 8825 Hex Lag Screws
Werkstoff NR. 2.4858 Eye Bolts
Werkstoff NR. 2.4858 Wood Screws
WNR 2.4858 Hex Head Bolts
Equivalent Grades of Incoloy 825 Fasteners
| Standard / System | UNS (USA) | Werkstoff Nr. (Germany) | EN (Europe) | AFNOR (France) | JIS (Japan) | BS (UK) | GOST (Russia) |
|---|---|---|---|---|---|---|---|
| Designation | N08825 | 2.4858 | NiCr21Mo / X1NiCrMoCuN25-20-5 | NFE30C20DUM | NCF 825 | NA 16 | ЭП703 (EP703) |
Dimensions Chart of Incoloy 825 Fasteners
| Nominal Size or Basic Product Diameter | Full-Size Body Diameter, E | Width Across Flats, F | Width Across Corners, G | Head Height, H | Radius of Fillet, R | Nominal Thread Length for Bolt Lengths, LT |
|---|---|---|---|---|---|---|
| inch / mm | Max / Min | Basic (inch) / Max / Min | Max / Min | Basic (inch) / Max / Min | Max / Min | 6 in. & Shorter / Over 6 in. |
| 1/4 (0.250) | 0.260 / 0.237 | 7/16 (0.438 / 0.425) | 0.505 / 0.484 | 11/64 (0.188 / 0.150) | 0.03 / 0.01 | 0.75 / 1.00 |
| 5/16 (0.3125) | 0.324 / 0.298 | 1/2 (0.500 / 0.484) | 0.577 / 0.552 | 7/32 (0.235 / 0.195) | 0.03 / 0.01 | 0.875 / 1.125 |
| 3/8 (0.375) | 0.388 / 0.360 | 9/16 (0.562 / 0.544) | 0.650 / 0.621 | 1/4 (0.268 / 0.226) | 0.03 / 0.01 | 1.00 / 1.25 |
| 7/16 (0.4375) | 0.452 / 0.421 | 5/8 (0.625 / 0.603) | 0.722 / 0.687 | 19/64 (0.316 / 0.272) | 0.03 / 0.01 | 1.125 / 1.375 |
| 1/2 (0.500) | 0.515 / 0.482 | 3/4 (0.750 / 0.725) | 0.866 / 0.826 | 11/32 (0.364 / 0.302) | 0.03 / 0.01 | 1.25 / 1.50 |
| 5/8 (0.625) | 0.642 / 0.605 | 15/16 (0.938 / 0.906) | 1.083 / 1.033 | 27/64 (0.444 / 0.378) | 0.06 / 0.02 | 1.50 / 1.75 |
| 3/4 (0.750) | 0.768 / 0.729 | 1 1/8 (1.125 / 1.088) | 1.299 / 1.240 | 1/2 (0.524 / 0.455) | 0.06 / 0.02 | 1.75 / 2.00 |
| 7/8 (0.875) | 0.895 / 0.852 | 1 5/16 (1.312 / 1.269) | 1.516 / 1.447 | 37/64 (0.604 / 0.531) | 0.06 / 0.02 | 2.00 / 2.25 |
| 1 (1.000) | 1.022 / 0.976 | 1 1/2 (1.500 / 1.450) | 1.732 / 1.653 | 43/64 (0.700 / 0.591) | 0.09 / 0.03 | 2.25 / 2.50 |
| 1 1/8 (1.125) | 1.149 / 1.098 | 1 11/16 (1.688 / 1.631) | 1.949 / 1.859 | 3/4 (0.780 / 0.658) | 0.09 / 0.03 | 2.50 / 2.75 |
| 1 1/4 (1.250) | 1.277 / 1.223 | 1 7/8 (1.875 / 1.812) | 2.165 / 2.066 | 27/32 (0.876 / 0.749) | 0.09 / 0.03 | 2.75 / 3.00 |
| 1 3/8 (1.375) | 1.404 / 1.345 | 2 1/16 (2.062 / 1.994) | 2.382 / 2.273 | 29/32 (0.940 / 0.810) | 0.09 / 0.03 | 3.00 / 3.25 |
| 1 1/2 (1.500) | 1.531 / 1.472 | 2 1/4 (2.250 / 2.175) | 2.598 / 2.481 | 1 (1.036 / 0.902) | 0.09 / 0.03 | 3.25 / 3.50 |
| 1 5/8 (1.625) | 1.658 / 1.591 | 2 7/16 (2.438 / 2.356) | 2.815 / 2.616 | 1 3/32 (1.116 / 0.978) | 0.09 / 0.03 | 3.50 / 3.75 |
| 1 3/4 (1.750) | 1.785 / 1.716 | 2 5/8 (2.625 / 2.538) | 3.031 / 2.893 | 1 5/32 (1.196 / 1.054) | 0.12 / 0.04 | 3.75 / 4.00 |
| 1 7/8 (1.875) | 1.912 / 1.839 | 2 13/16 (2.812 / 2.719) | 3.248 / 3.099 | 1 1/4 (1.276 / 1.130) | 0.12 / 0.04 | 4.00 / 4.25 |
| 2 (2.000) | 2.039 / 1.964 | 3 (3.000 / 2.900) | 3.464 / 3.306 | 1 11/32 (1.388 / 1.175) | 0.12 / 0.04 | 4.25 / 4.50 |
| 2 1/4 (2.250) | 2.305 / 2.214 | 3 3/8 (3.375 / 3.262) | 3.897 / 3.719 | 1 1/2 (1.548 / 1.327) | 0.19 / 0.06 | 4.75 / 5.00 |
| 2 1/2 (2.500) | 2.559 / 2.461 | 3 3/4 (3.750 / 3.625) | 4.330 / 4.133 | 1 21/32 (1.708 / 1.479) | 0.19 / 0.06 | 5.25 / 5.50 |
| 2 3/4 (2.750) | 2.827 / 2.711 | 4 1/8 (4.125 / 3.988) | 4.763 / 4.546 | 1 13/16 (1.869 / 1.632) | 0.19 / 0.06 | 5.75 / 6.00 |
| 3 (3.000) | 3.081 / 2.961 | 4 1/2 (4.500 / 4.350) | 5.196 / 4.959 | 2 (2.060 / 1.815) | 0.19 / 0.06 | 6.25 / 6.50 |
| 3 1/4 (3.250) | 3.335 / 3.210 | 4 7/8 (4.875 / 4.712) | 5.629 / 5.372 | 2 3/16 (2.251 / 1.936) | 0.19 / 0.06 | 6.75 / 7.00 |
| 3 1/2 (3.500) | 3.589 / 3.461 | 5 1/4 (5.250 / 5.075) | 6.062 / 5.786 | 2 5/16 (2.380 / 2.057) | 0.19 / 0.06 | 7.25 / 7.50 |
| 3 3/4 (3.750) | 3.858 / 3.726 | 5 5/8 (5.625 / 5.437) | 6.495 / 6.198 | 2 1/2 (2.572 / 2.241) | 0.19 / 0.06 | 7.75 / 8.00 |
| 4 (4.000) | 4.111 / 3.975 | 6 (6.000 / 5.800) | 6.928 / 6.612 | 2 11/16 (2.764 / 2.424) | 0.19 / 0.06 | 8.25 / 8.50 |
Applications and Industrial used of Incoloy 825 Fasteners
- Chemical Processing Industry
- Oil & Gas Industry
- Petrochemical Industry
- Marine & Offshore Industry
- Acid Production Industry
- Nuclear Power Industry
- Pollution Control Industry
- Pharmaceutical Industry
Frequently Asked Questions
1. What are Incoloy 825 Fasteners?
Incoloy 825 Fasteners are corrosion-resistant fasteners made from a nickel-iron-chromium alloy for demanding industrial environments.
2. What is Incoloy 825 made of?
Incoloy 825 is a nickel-iron-chromium alloy containing molybdenum, copper, and titanium.
3. Are Incoloy 825 Fasteners corrosion resistant?
Yes. They provide excellent resistance to acids, pitting, and stress corrosion cracking.
4. What is the difference between Incoloy 825 and Incoloy 800 Fasteners?
Incoloy 825 offers better resistance to aggressive acids and localized corrosion, while Incoloy 800 is mainly selected for high-temperature applications.
5. Is Incoloy 825 the same as Inconel 825?
Yes. Incoloy 825 and Inconel 825 are commonly used names for the same alloy, UNS N08825.
6. Are Incoloy 825 Fasteners suitable for chemical processing?
Yes. They are widely used in chemical processing equipment exposed to corrosive acids and chemicals.
