Incoloy 800 Fasteners

Incoloy 800 fasteners are fasteners of a nickel-iron-chromium alloy of UNS N08800. The alloy contains nearly equal proportions of nickel and iron, with chromium that provides it good resistance to oxidation and carburization at elevated temperatures. These fasteners are widely used in process industries where exposure to heat and corrosive elements is constant. Alloy 800 fasteners are part of the Incoloy family and are different from Inconel grades, and are better for moderate to high temperature use than extreme conditions.

They are available in standard forms such as bolts, nuts, studs, screws, and washers, and are available in metric and inch thread configurations.

Approx Price Range

Incoloy 800 fasteners are priced between ₹100 and ₹350 per piece, varying by size, type, and order quantity. Per unit costs start as low as ₹100 for smaller bolts, while larger studs and heavy hex bolts command a higher price per piece.

Price Per Unit / Kg

Incoloy 800 fasteners' price is generally in the range of ₹1,200-₹2,200 per kg, depending on size, type & quantity ordered. Larger studs or heavy hex bolts will have a higher price per piece. UNS N08800 fasteners are more affordable than Inconel 625 but still cost significantly more than standard stainless steel fasteners.

Factors Affecting Price

The price of Incoloy 800 fasteners depends on several factors. Changes in the prices of nickel and iron directly affect the overall cost. The more expensive ones are the larger and more complex fasteners than the smaller standard fasteners. The price per kg is usually reduced when ordering in bulk. Extra certifications, such as third‑party inspection or NACE compliance, also add to the total cost.

Types of Incoloy 800 Fasteners

Incoloy 800 fasteners are supplied in different types to suit various applications, including bolts, nuts, studs, screws, washers, and special fasteners.

Incoloy 800 Bolts

Incoloy 800 Nuts

Incoloy 800 Studs

Incoloy 800 Screws

Incoloy 800 Washers

Incoloy 800 Special Fasteners

Specifications of Incoloy 800 Fasteners

This table outlines the specifications of Incoloy 800 fasteners, covering material grade, standards, thread details, size range, length limits, and hardness values, along with commonly supplied forms used in industrial applications.

Parameter	Details
Material Grade	Incoloy 800 / UNS N08800 / W.Nr. 1.4876
Standard	ASTM F468, ASTM B408, ASME SB408
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 800 Fasteners

This table shows the chemical composition of Incoloy 800, including major and minor elements with their limits, which are used for material identification and also to maintain the needed performance in service conditions.

Element	Composition (%)
Grade	Incoloy 800
Carbon (C)	0.1 max
Manganese (Mn)	1.5 max
Silicon (Si)	1.0 max
Copper (Cu)	0.75 max
Sulfur (S)	0.015 max
Nickel (Ni)	30 – 35
Chromium (Cr)	19 – 23
Iron (Fe)	39.5 min
Titanium (Ti)	0.15 – 0.60
Aluminium (Al)	0.15 – 0.60

Mechanical Properties of Incoloy 800 Fasteners

This table shows the mechanical properties of Incoloy 800 fasteners, including tensile strength, yield strength, elongation, hardness limits, and density values for material selection and design reference.

Property	Value
Tensile Strength	520 MPa min
Yield Strength (0.2% offset)	205 MPa min
Elongation	30% min
Hardness (Brinell)	241 HB max
Density	7.94 g/cm³

Physical Properties of Incoloy 800 Fasteners

Physical properties of Incoloy 800 fasteners are provided in the table below. These include density, melting temperature range, thermal conductivity, electrical resistivity, and specific heat.

Property	Value
Density	7.94 g/cm³
Melting Point	1357°C – 1385°C
Thermal Conductivity	11.5 W/m·K at 21°C
Electrical Resistivity	0.99 µΩ·m
Specific Heat	460 J/kg·K

Dimension Chart of Incoloy 800 Fasteners

This table shows standard dimensions of Incoloy 800 fasteners, including shank diameter, head width, and head height for different bolt sizes.

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 800 Fasteners

The table below shows the size conversions of Incoloy 800 fasteners from inches to metric and the common range of lengths available for use in applications.

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 800 Fasteners

This table shows reference torque values for Incoloy 800 fasteners in dry and lubricated conditions. Actual values should be verified before use.

Bolt Size	Torque (Nm) — Dry	Torque (Nm) — Lubricated
M6	8	6
M8	20	15
M10	40	30
M12	68	51
M16	165	124
M20	325	245
M24	560	420

Torque values are for reference only. Verify against specific application conditions and flange ratings before use.

Key Features of Incoloy 800 Fasteners

Incoloy 800 fasteners provide excellent high-temperature strength, superior oxidation resistance, and microstructural stability in demanding industrial and petrochemical applications.

Good resistance to oxidation and carburization
Stable microstructure
Resistant to stress corrosion cracking
Suitable for use in both oxidising and reducing atmospheres
A low-carbon variant (Incoloy 800H / 800HT) for creep-sensitive applications
Chemical and petrochemical plants
Full material certification and traceability

UNS N08800 fasteners are better suited for applications demanding long-term thermal stability as opposed to extreme corrosion resistance.

Applications of Incoloy 800 Fasteners

Alloy 800 fasteners are used in several processes and industrial sectors:

Petrochemical Processing
Power Generation
Chemical Industry
Heat Treatment
Nuclear Industry
Food and Beverage

Incoloy 800 fasteners suppliers frequently supply to refineries and petrochemical plants, where sustained high-temperature performance is a core requirement.

How to Choose the Right Incoloy 800 Fasteners Supplier?

Choosing the right Incoloy 800 fasteners supplier comes down to material traceability, certifications, and supplier reliability.

Supplier Selection Criteria

Check if the Incoloy 800 fasteners supplier has UNS N08800 material in stock in different forms and can provide full documentation. Suppliers that regularly deal with petrochemical or power generation customers are more likely to be aware of the certification and quality requirements for this grade. A good supplier will be responsive and forthcoming about their lead times, especially for non-standard sizes.

Technical Considerations

Confirm that the fasteners are manufactured to ASTM F468 and that the material meets UNS N08800 chemistry. For high-temperature service, check whether the application needs standard Alloy 800 or the higher carbon variants, 800H or 800HT, as these have different creep properties. Thread compatibility with mating components should always be verified before ordering.

Quality & Certification Check

Specify EN 10204 3.1 mill certificates as the default requirement. For pressure-rated or safety‑critical services, you may need EN 10204 3.2 certification with third‑party inspection. Always check whether the quoted price in Incoloy 800 fasteners is inclusive or exclusive of testing and certification costs before you buy.

Procurement Tips for Bulk Orders

For larger procurement volumes of Incoloy 800 fasteners, compare quotes from at least three Incoloy 800 fastener suppliers. Check that the material is from a single heat for traceability. Firstly, clarify this as packaging norms are important for export orders. If the project is divided into staggered installation phases, ask if partial deliveries can be made without any price change.