Incoloy 800 Fasteners

ASTM B408 800H Washers Manufacturer in India

Incoloy Alloy 800 and 800H fasteners are widely used in high-temperature applications requiring superior oxidation and corrosion resistance. These fasteners are made of a nickel-chromium alloy with excellent strength and resistance to thermal fatigue and stress corrosion cracking. Incoloy Alloy 800 is available in many forms, including fasteners like nuts, bolts, screws, and washers. These fasteners are classified according to their size, shape, and application. The Incoloy Alloy 800 Fastener is available in various grades, such as B7, B16, and B8M, that differ in mechanical and chemical properties. The B7 grade is used mainly in high-temperature applications, while the B16 is used in low-temperature applications.


The Incoloy Alloy 800H Fastener is a variation of the Alloy 800 with higher carbon content, enhancing its strength and resistance to carburization and creep rupturing. It is commonly used in high-temperature environments, such as industrial furnaces, heat-treating facilities, chemical processing, and power generation plants. The fastener's high tensile strength and corrosion resistance make it ideal for use in harsh environments and applications that require exceptional performance.


Incoloy Alloy 800 and 800H fasteners offer many benefits, making them an excellent choice for high-temperature applications. These benefits include excellent resistance to oxidation and corrosion, high strength and durability, and superior thermal stability. Additionally, the fasteners offer exceptional resistance to carburization and stress corrosion cracking, which are prevalent in high-temperature environments.
Another benefit of Incoloy Alloy 800 and 800H fasteners is their low coefficient of thermal expansion, which ensures that they retain their shape and dimensions even at high temperatures. This feature makes them ideal for applications that require tight tolerances and precision, such as turbine engines and power generation equipment. Incoloy Alloy 800H fasteners can withstand repeated thermal cycles without losing their integrity, even under extreme stress.


Incoloy Alloy 800 and 800H fasteners are the perfect solutions for high-temperature applications requiring exceptional performance, oxidation, corrosion resistance, and thermal stability. These fasteners offer several advantages over traditional materials, including high strength and durability, excellent resistance to stress corrosion cracking, and low coefficient of thermal expansion, making them ideal for use in harsh environments.


Specification of Incoloy 800 / 800H Fasteners

Spec bag

Specifications: ASTM B408,F467 / ASME SB408,SF467

Standard: DIN, ASTM, BS and all International Standards

Length: 3 mm to 200 mm

Size: M3 - M56 | 3/6" to 2" | Custom Sizes

Heat Treatment: Annealing, Stress Relieving, Case Hardening, Quenching and Tempering.

Types of Incoloy Alloy 800 / 800H Fasteners

Incoloy 800 / 800H Bolts

Incoloy Bolt

Incoloy 800 / 800H Nuts

Incoloy Nuts

Incoloy 800 / 800H Stud Bolts

Incoloy Stud Bolt

Incoloy 800 / 800H Washers

Incoloy Washer

Equivalent Grades for Incoloy 800 / 800H Fasteners

STANDARD WERKSTOFF NR. UNS JIS BS GOST AFNOR EN OR
Incoloy 800 1.4876 N08800 NCF 800 NA 15 ЭИ670 Z8NC32-21 X10NiCrAlTi32-20 XH32T
Incoloy 800H 1.4958 N08810 NCF 800H NA 15(H) ЭИ670 Z8NC33-21 X5NiCrAlTi31-20 XH32T
Incoloy 800HT 1.4959 N08811 NCF 800HT NA 15(HT) ЭИ670 - X8NiCrAlTi32-21 XH32T

Incoloy 800 / 800H Fasteners Chemical Composition

Grade C Mn Si S Cu Fe Ni Cr
Incoloy 800 0.10 max 1.50 max 1.00 max 0.015 max 0.75 max 39.50 min 30.00 – 35.00 19.00 – 23.00
Incoloy 800H 0.05 – 0.10 1.50 max 1.00 max 0.015 max 0.75 max 39.50 min 30.00 – 35.00 19.00 – 23.00
Incoloy 800HT 0.06 – 0.10 1.50 max 1.00 max 0.015 max 0.75 max 39.50 min 30.00 – 35.00 19.00 – 23.00

Mechanical Properties of Incoloy 800 / 800H Fasteners

Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
7.94 g/cm3 1385 °C (2525 °F) Psi – 75,000 , MPa – 520 Psi – 30,000 , MPa – 205 30 %

Incoloy Alloy 800 Fasteners are available in various types to suit different fastening needs. Common types include hex bolts, socket head cap screws, nuts (hex nuts, heavy hex nuts), washers (flat washers, spring washers), and studs. These fasteners come in various sizes, thread configurations, & forms to accommodate different fastening requirements.

Yes, Incoloy Alloy 800 Fasteners offer good corrosion resistance. They exhibit excellent resistance to oxidation, carburization & nitridation at high temperatures. Incoloy 800 also resists various corrosive environments, including acids, alkalis & aqueous solutions.

Incoloy Alloy 800 Fasteners are a type of fastening component made from Incoloy 800, a nickel-iron-chromium alloy. These fasteners include various types, such as bolts, screws, nuts, washers, & studs.