Incoloy 825 Fasteners

Incoloy 825 fasteners are manufactured from UNS N08825, a nickel-iron-chromium alloy containing molybdenum, copper, and titanium. This composition gives alloy 825 fasteners strong resistance to both oxidising and reducing corrosive environments, including sulfuric acid, phosphoric acid, and chloride media. They also resist pitting, crevice corrosion, and stress corrosion cracking reasonably well.

This is not a high-temperature alloy. Corrosion resistance is where UNS N08825 fasteners are most useful. Chemical processing, oil and gas, and marine industries use Incoloy 825 fasteners regularly for that reason.

Approx Price Range

Incoloy 825 fasteners pricing reflects alloy composition, size variation, and certification scope, typically positioned above stainless steel yet below higher nickel alloys in cost.

Price Per Unit / Kg

Incoloy 825 fasteners are priced generally from ₹100-₹2,900/kg depending on size, type, quantity, and certification requirements. Fasteners like M8 or M10 bolts are priced from ₹100 to ₹230/piece. Heavy hex bolts and larger studs are more expensive per unit. UNS N08825 fasteners are priced above standard stainless steel but are less expensive than Inconel 625 or 718 grades.

Incoloy 825 fasteners suppliers in India offer competitive prices for export orders, especially for large quantities with standard certification packages.

Factors Affecting Price

The cost of raw materials depends on the nickel, molybdenum, and copper content. Price is therefore subject to market rates. Pricing is also affected by size and form. Larger fasteners or non-standard types are more expensive. Order quantity is a consideration, too. Bulk orders tend to reduce the per kg rate. Certification requirements, such as NACE or third-party testing, add additional cost. Surface finish, such as passivation or coatings, is priced separately. Lead time has an impact, too, with urgent or special orders usually priced higher.

Types of Incoloy 825 Fasteners

Incoloy 825 fasteners are available in different types to suit various applications, with both metric and inch thread configurations supplied.

Incoloy 825 Bolts
Incoloy 825 Nuts
Incoloy 825 Studs
Incoloy 825 Screws
Incoloy 825 Washers
Incoloy 825 Special Fasteners

Specifications of Incoloy 825 Fasteners

This table gives key specifications of Incoloy 825 fasteners for general reference in selection, including standard requirements and basic product details for industrial use.

Parameter	Details
Material Grade	Incoloy 825 / UNS N08825 / W.Nr. 2.4858
Standard	ASTM F468, ASTM B425, ASME SB425
Thread Standard	ASME B1.1, B1.13M
Size Range	M3 to M100 / 3/16" to 4"
Length	Up to 6000mm or as required
Hardness	241 HB max
Available Forms	Bolts, Nuts, Studs, Screws, Washers

Chemical Properties of Incoloy 825 Fasteners

The table below shows Incoloy 825 fastener types and main specifications, including chemical, mechanical, and physical properties for material selection and engineering design.

Element	Composition (%)
Nickel (Ni)	38.0 – 46.0
Chromium (Cr)	19.5 – 23.5
Iron (Fe)	22.0 min
Molybdenum (Mo)	2.50 – 3.50
Copper (Cu)	1.50 – 3.00
Titanium (Ti)	0.60 – 1.20
Carbon (C)	0.05 max
Manganese (Mn)	1.00 max
Silicon (Si)	0.50 max
Sulfur (S)	0.03 max
Aluminum (Al)	0.20 max

Mechanical Properties of Incoloy 825 Fasteners

This table details the mechanical properties of Incoloy 825 fasteners, which help assess strength, ductility, and hardness behaviour under different operating conditions and application requirements.

Property	Value
Tensile Strength	585 MPa min
Yield Strength (0.2% offset)	240 MPa min
Elongation	30% min
Hardness (Brinell)	241 HB max
Density	8.14 g/cm³

Physical Properties of Incoloy 825 Fasteners

This table provides physical properties of Incoloy 825 fasteners, helpful for understanding thermal, electrical, and density characteristics used in engineering design considerations, for reference purposes only.

Property	Value
Density	8.14 g/cm³
Melting Point	1370°C – 1400°C
Thermal Conductivity	11.1 W/m·K at 21°C
Electrical Resistivity	1.13 µΩ·m
Specific Heat	440 J/kg·K

Dimension Chart of Incoloy 825 Fasteners

The chart below is the dimension chart of Incoloy 825 fasteners. It also shows the important size information required for the proper fit and assembly requirements.

Bolt Size	Shank Diameter (mm)	Head Width (mm)	Head Height (mm)
M6	6.0	10.0	4.0
M8	8.0	13.0	5.3
M10	10.0	16.0	6.4
M12	12.0	18.0	7.5
M16	16.0	24.0	10.0
M20	20.0	30.0	12.5
M24	24.0	36.0	15.0

Size Chart of Incoloy 825 Fasteners

This table explains available inch and metric sizes of Incoloy 825 fasteners, along with typical length ranges used in practice.

Inch Size	Metric Equivalent	Common Length Range
1/4"	M6	10mm – 150mm
3/8"	M10	15mm – 200mm
1/2"	M12	20mm – 300mm
5/8"	M16	25mm – 400mm
3/4"	M20	30mm – 500mm
1"	M24	40mm – 600mm
1-1/4"	M30	50mm – 800mm

Torque Charts of Incoloy 825 Fasteners

Torque values for Incoloy 825 fasteners are shown here for dry and lubricated conditions, useful for tightening guidance and application control.

Bolt Size	Torque (Nm) -- Dry	Torque (Nm) -- Lubricated
M6	9	7
M8	21	16
M10	42	32
M12	72	54
M16	175	132
M20	345	260
M24	595	447

Torque values are for reference only. Actual torque should be verified based on joint design, gasket material, and specific application conditions.

Key Features of Incoloy 825 Fasteners

Incoloy 825 fasteners are engineered for aggressive environments, combining strong corrosion resistance with stable metallurgy across acid exposure, chloride media, and welded applications.

Resistance to sulfuric and phosphoric acids
Resistance to pitting and crevice corrosion
Resistance to stress corrosion cracking
Copper and molybdenum alloying
Suitable for marine and chemical environments
Titanium stabilised structure
Available with EN 10204 3.1 / 3.2 certification
Full material traceability

UNS N08825 fasteners work well in applications where the primary concern is corrosion from acids or seawater rather than high-temperature mechanical loads.

Applications of Incoloy 825 Fasteners

Alloy 825 fasteners are used across several corrosion-critical industries:

Oil and Gas
Chemical Processing
Marine
Pollution Control
Nuclear
Pickling Equipment
Food and Pharmaceutical

Incoloy 825 fasteners suppliers regularly supply to chemical and offshore projects where acid and chloride exposure are constant factors.

How to Choose the Right Incoloy 825 Fasteners Supplier?

Selecting an Incoloy 825 fastener supplier involves assessing compliance, certifications, sourcing capability, and procurement terms affecting performance, pricing, and delivery timelines.

Supplier Selection Criteria

A good Incoloy 825 fastener supplier should be able to supply the UNS N08825 material in different forms and be able to supply the full documentation without any delay. Check whether the supplier has experience in chemical processing or offshore projects, as these industries have quality requirements of their own. It is helpful to ask what they do with non-standard sizes and typical lead times for those orders.

Technical Considerations

Confirm that the alloy 825 fasteners meet ASTM F468 and that the material chemistry matches UNS N08825 specifications. For sour gas or acid service, NACE MR0175 compliance is often a project requirement. The thread form should be confirmed against the mating component before ordering. If the application involves welding near the fastener, the titanium-stabilised nature of this alloy is worth factoring into the joint design.

Quality & Certification Check

Request EN 10204 3.1 mill certificates as a minimum. For offshore or chemical plant projects, 3.2 certification with third-party inspection is more common. Some of the Incoloy 825 fastener price quotes do not include testing costs, so be sure to clarify this with the supplier before the purchase is made. If you need NACE compliance, then you need to ask for this during the inquiry phase and not after the order is placed.

Procurement Tips for Bulk Orders

For bulk procurement of alloy 825 fasteners, compare at least three quotes from different Incoloy 825 fasteners suppliers. Ask if the material can be supplied from one heat lot. This helps with traceability on regulated projects. Check packaging standards for export shipment. If the project is to be installed in phases, confirm the supplier’s ability to accept partial deliveries without affecting the overall price.