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Incoloy 800/ 800H/ 800HT Fasteners Suppliers & Exporters

ASTM B408 Alloy 800H/HT Fasteners, ASTM B358 Incoloy 800 Fasteners Manufacturer, Exporter & Suppliers in India. Get UNS N08800 Incoloy 800 Bolts, Nuts & Threaded Rods at Best Price.

Incoloy 800/ 800H/ 800HT Fasteners Suppliers

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Kalpataru Piping Solutions is a top Incoloy 800, 800H and 800HT fasteners manufacturer, supplier and exporter in India. Our assortments of high-performance inconel fasteners, such as eye bolts, hex bolts, square bolts, countersunk bolts, wing nuts, and coupling nuts, among others, are very diverse. Incoloy 800H/800HT fasteners are designed with high tensile strength, high creep strength, and corrosion resistance. All the 800 incoloy fasteners are produced depending on international standards like ASME, ASTM, DIN and UNI. Incoloy 800/800H/800HT fasteners are excellent in high temperature operations up to 1200°C (2192°F). We supply fasteners in custom sizes, shapes and finishes, such as zinc-plated, galvanized and polished.

Precision Engineered Incoloy 800 Fasteners for Applications

The fasteners are used for pressure vessels, heat exchangers, and process piping to sustain ductile and tough characteristics. Incoloy 800 fasteners are applied in petrochemical plants, pulp and paper industries, offshore oil rigs, nuclear power plants, and furnace parts. All products are rigorously checked for quality, including analysis of chemical composition, mechanical tests & non-destructive tests.

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Introduction to Incoloy 800 Fasteners

Incoloy 800 fasteners are part of the Incoloy alloy, not stainless steel & are chosen for environments where stainless steel fasteners cannot provide the required heat or corrosion resistance. Other grades of stainless steel such as 304, oxidize or deform when heated whereas Incoloy 800 is remains stable. Incoloy 800 fasteners have high impact on resistance, good mechanical stability and high creep resistance. This ensures that they are very dependable in sustained thermal transitions and high-temperature industrial applications. Incoloy 800/800H/800HT fasteners offer excellent performance in carburization, nitriding environment, sulfur containing environment, and high temperature oxidation.

Variants of Incoloy 800 Fasteners

The Incoloy 800 series includes two enhanced variants—Alloy 800H (UNS N08810) and Alloy 800HT (UNS N08811). 

Alloy 800H (UNS N08810)

Alloy 800H limits the amount of carbon to the higher range, enhancing creep strength and long-term stability. The grade finds extensive application in heat exchangers, petrochemical equipment and nuclear applications, where constant exposure to high temperatures is usual.

In Alloy 800H the quantity of carbon is restricted to the upper limit, increasing the creep strength and long-term stability. The grade has widespread use in heat exchangers, petrochemical equipment and nuclear applications, where they are normally subjected to high temperatures.

Alloy 800HT (UNS N08811)

Alloy 800HT boasts of very fine control over carbon, aluminium and titanium with a combined percentage of both being approximately 1.20. This gives excellent creep-rupture strength and renders ASTM B408 / UNS N08811 threaded rods suitable for high-temperature structural applications.

Incoloy 800 Fasteners Specifications List

Threads: METRIC, BSF, BSW, UNC, UNF or as per need
Standard BS, ANSI, ASME, JIS, DIN, IS, GB, UNI, ASTM, ISO Fasterners
Incoloy 800 Fasteners Standard ANSI
  • ANSI B 18.2.4 2M Fasteners
  • ASME B18.2.2
  • ASME B16.5 standard Fasteners
  • ANSI B 28.2.4 1M
  • ASME B18.5 Fasteners
DIN: DIN 912, DIN 603, DIN 933, DIN 6923, DIN 970, DIN 931, DIN 7981, DIN 934, DIN916, DIN 7985, DIN 7982, DIN 913, B.S. Fasteners UTS : UNEF, UNS, NPTF, UNC, NPT, UNF Fasteners ISO :ISO 7380, ISO 4033, ISO 4017, JIS standards, ISO 4032 Fasteners
Fasteners/ Bolts Size M3, M8, (M22), (M45), (M18), (M27), M12, M2, M30, M160, M20, M33, (M3.5), M10, M4, M6, M36, M5, M42, (M14), M16, M24, M48 and as per need
Length 3 milimeter – 200 milimeter
Head drive: Slotted, Six-Lobe, Phillips/Slot, Phillips, etc
Fasteners Test Certificate EN 10204 / 3.1
Incoloy 800 Fasteners raw materials of Source JSPL, Usha Martin, Dhamm Steel, Tata Steel, RINL, Mukund Steel etc.
Form Square, Hex, Threading as per Gauge, Round Etc.
Incoloy 800 Fasteners Process of Production
  • for CNC and Machining : M100 / 4” Diameter, 1500 milimeter long
  • Hot forging: 1-1/2” Diameter, M24 to M100, 1100 milimeter long
  • Cold Froging : M2 to M24
Incoloy 800 Fasteners Surface Coating
  • Xylon Coated Incoloy 800 Fasteners
  • Zinc Coated Incoloy 800 Fasteners
  • Ptfe Coated Incoloy 800 Fasteners
  • Hot Dipped Galvanizing Coated Incoloy 800 Fasteners
  • Phosphate Coated Incoloy 800 Fasteners
  • Teflon Coated Incoloy 800 Fasteners
  • Cadmium Coated Incoloy 800 Fasteners

Common Thread Types for ASTM B408 UNS N08800 Fasteners

Thread Types
UNC Unified National Coarse
UNF Unified National Fine
Metric Threads Coarse & Fine
BSW British Standard Whitworth
ACME Threads –
NPT National Pipe Thread

Incoloy Alloy 800 Fasteners Types

800HT Nuts

800HT Nuts

800HT Screws

800HT Screws

800HT Stud Bolts

800HT Stud Bolts

800HT Washers

800HT Washers

800HT Anchor Bolts

800HT Anchor Bolts

800HT Bolts

800HT Bolts

Chemical Properties of Incoloy Alloy 800 Fasteners

Grade Mn C Si S Fe Al-Ti Cr Ni
Incoloy 800 Fasteners min. – – – – 39.5 0.15 19.0 30.0
max. 1.5 0.1 1.0 0.015 – 0.60 23.0 35.0
Incoloy 800H Fasteners min. – 0.05 – – 39.5 0.15 19.0 30.0
max. 1.5 0.1 1.0 0.015 – 0.60 23.0 35.0
Incoloy 800HT Fasteners min. – 0.06 – – 39.5 0.85/0.25 19.0 30.0
max. 1.5 0.1 1.0 0.015 – 1.20/0.60 23.0 35.0

Mechanical Properties of Inconel UN08800 Fasteners

Incoloy 800 Fasteners Grade Yield Strength 0.2% Proof (MPa) min Tensile Strength (MPa) min Elongation (% in 50mm) min Hardness
Brinell (HB) max Rockwell B (HR B) max
Incoloy 800-H-HT Fasteners Psi – 30,000 , MPa –205 Psi – 75,000 , MPa – 520 30 – –

Incoloy Alloy 800 Fasteners Equivalent Grade

STANDARD UNS OR WERKSTOFF NR. BS JIS AFNOR GOST EN
Incoloy 800H Fasteners N08810 XH32T 1.4958 / 1.4876 NA 15(H) NCF 800H Z8NC33-21 ЭИ670 X5NiCrAlTi31-20
Incoloy 800 Fasteners N08800 XH32T 1.4876 NA 15 NCF 800 Z8NC32-21 ЭИ670 X10NiCrAlTi32-20
Incoloy 800HT Fasteners N08811 XH32T 1.4859 / 1.4876 NA 15(HT) NCF 800HT – ЭИ670 X8NiCrAlTi32-21

Incoloy 800 Stud Bolts Dimensions

Nominal Size Diameter, D inch Tap End Full Thread Length, BM Minimum Nut End Full Thread Length, Bmin Umax = 2P
Nominal Min. Max. L ≤ 10 10 < L ≤ 16 L > 16 UNC & NC-5 Thread UNF Thread 8UN Thread
1 1/8 1.688 1.625 1.750 2.500 2.750 3.250 0.286 0.167 0.250
1 1/4 1.875 1.813 1.938 2.750 3.000 3.500 0.286 0.167 0.250
1 3/8 2.063 2.000 2.125 3.000 3.250 3.750 0.333 0.167 0.250
1 1/2 2.250 2.188 2.313 3.250 3.500 4.000 0.333 0.167 0.250
1 5/8 2.438 2.375 2.500 3.500 3.750 4.250 — — 0.250
1 3/4 2.625 2.563 2.688 3.750 4.000 4.500 0.400 — 0.250
1 7/8 2.813 2.750 2.875 4.000 4.250 4.750 — — 0.250
2 3.000 2.925 3.075 4.250 4.500 5.000 0.444 — 0.250
2 1/4 3.375 3.300 3.450 4.750 5.000 5.500 0.444 — 0.250
2 1/2 3.750 3.675 3.825 5.250 5.500 6.000 0.500 — 0.250
2 3/4 4.125 4.050 4.200 5.750 6.000 6.500 0.500 — 0.250
3 4.500 4.425 4.575 — 6.500 7.000 0.500 — 0.250
3 1/4 4.875 4.775 4.975 — 7.000 7.500 0.500 — 0.250
3 1/2 5.250 5.150 5.350 — 7.500 8.000 0.500 — 0.250
3 3/4 5.625 5.525 5.725 — 8.000 8.500 0.500 — 0.250
4 6.000 5.900 6.100 — 8.500 9.000 0.500 — 0.250
1/4 0.375 0.350 0.400 0.750 1.000 1.500 0.100 0.071 …
5/16 0.469 0.440 0.498 0.875 1.125 1.625 0.111 0.083 —
3/8 0.563 0.532 0.594 1.000 1.250 1.750 0.125 0.083 —
7/16 0.656 0.620 0.692 1.125 1.375 1.875 0.143 0.100 —
1/2 0.750 0.708 0.792 1.250 1.500 2.000 0.154 0.100 —
9/16 0.844 0.802 0.896 1.375 1.625 2.125 0.167 0.111 —
5/8 0.938 0.892 0.983 1.500 1.750 2.250 0.182 0.111 —
3/4 1.1.25 1.075 1.175 1.750 2.000 2.500 0.200 0.125 —
7/8 1.313 1.258 1.368 2.000 2.250 2.750 0.222 0.143 —
1 1.500 1.438 1.562 2.250 2.500 3.000 0.250 0.167 —

Incoloy 800 Nut Weight Chart

Size Heavy Hex Finished Jam Square Heavy Square Finished Hex
5⁄8“ Nut 11.9 4.93 10.8 14.3 7.33
1⁄2“ Nut 6.54 2.62 5.78 7.87 3.75
7⁄8“ Nut 29.7 12.0 24.5 36.2 19.0
3⁄4“ Nut 19.3 7.70 15.4 23.5 11.9
11⁄8“ Nut 59.2 24.7 52.5 72.4 40.3
11⁄4“ Nut 78.6 36.1 70.6 95.5 54.3
1″ Nut 42.5 17.6 36.3 51.5 28.3
11⁄2“ Nut 131 60.9 122 161 94.3
13⁄8“ Nut 102 47.9 94.5 125.0 73.0
13⁄4“ Nut 204 100 – – 151
15⁄8“ Nut 162 – – – –
2″ Nut 299 140 – – 224

Incoloy 800 Fasteners Physical Properties

Density 7.94 g/cm3
Melting Range 2475 To 2525°F
Specific Heat (32-212°F) 0.11 Btu/lb•°F
Curie Temperature -175°F

Incoloy 800/800H/800HT Hex Bolt Dimension

NOMINAL SIZE (D)
BODY DIAMETER
HEAD THICKNEASTM A193
ACROASTM A193 THE FLATS
ACROASTM A193 CORNERS
D (MAX)
D (MIN)
H (MAX)
H (MIN)
F (MAX)
F (MIN)
C (MAX)
C (MIN)
m10
10.00
9.78
6.63
6.17
17.00
15.73
18.48
17.77
m12
12.00
11.73
7.76
4.24
19.00
17.73
20.78
20.03
m14
14.00
13.73
9.09
8.51
22.00
20.67
24.25
23.35
m16
16.00
15.73
10.32
9.68
24.00
23.67
27.71
26.75
m20
20.00
19.67
12.88
12.12
30.00
29.16
34.64
32.95
m24
24.00
23.67
15.44
14.56
36.00
35.00
41.57
39.55
m30
30.00
29.67
19.48
17.92
46.00
45.00
53.12
50.85
m36
36.00
35.61
23.38
21.63
55.00
53.80
63.51
60.79
m42
42.00
41.38
26.97
25.03
65.00
62.90
75.06
71.71
m48
48.00
47.38
31.07
28.93
75.00
72.60
86.60
82.76
m56
56.00
55.26
36.2
33.80
85.00
82.20
98.15
93.71
m64
64.00
63.26
41.32
38.68
95.00
91.80
109.70
104.65
m72
72.00
71.26
46.45
43.55
105.00
101.40
121.24
115.60
m80
80.00
79.26
51.58
48.42
115.00
111.00
132.72
126.54
m90
90.00
89.13
57.74
54.26
130.00
125.50
150.11
143.07
m100
90.00
99.13
63.9
60.10
145.00
140.00
167.43
159.60

Size Chart of Incoloy 800/800H/800HT Nuts

Nut Size (mm)
Diameter* (mm)
Height (mm)
Hex Nut
Jam Nut
Nylock Nut
2mm
4
1.6
1.2
–
2.5mm
5
2
1.6
–
3mm
5.5
2.4
1.8
4
4mm
7
3.2
2.2
5
5mm
8
4
2.7
5
6mm
10
5
3.2
6
7mm
11
5.5
3.5
–
8mm
13
6.5
4
8
10mm
17
8
5
10
12mm
19
10
6
12
14mm
22
11
7
14
16mm
24
13
8
16
18mm
27
15
9
18.5
20mm
30
16
10
20
* This is the diameter across the flats. It is also the size of wrench to use.

Frequently Asked Questions About Incoloy 800 Fasteners

What are Incoloy 800 fasteners?
Incoloy 800 fasteners are high-performance alloy fasteners made from nickel-iron-chromium alloy, designed for high-temperature and corrosion-resistant applications.
What is the difference between Incoloy 800, 800H, and 800HT fasteners?

Incoloy 800: General-purpose alloy fasteners with good corrosion and heat resistance.

Incoloy 800H: Heat-treated for improved strength at elevated temperatures.

Incoloy 800HT: Provides higher tensile strength and resistance at even higher temperatures.

What industries use Incoloy 800 fasteners?
These fasteners are widely used in chemical processing, petrochemical plants, power plants, marine environments, and high-temperature industrial applications.
What are the key benefits of Incoloy 800 fasteners?
  • Excellent resistance to oxidation and corrosion
  • High temperature strength
  • Long-term durability in harsh environments
What industries use Incoloy 800 fasteners?
These fasteners are widely used in chemical processing, petrochemical plants, power plants, marine environments, and high-temperature industrial applications.
What types of Incoloy 800 fasteners are available?
Available fasteners include bolts, nuts, screws, studs, washers, and custom-engineered components in various sizes and specifications.
Can Incoloy 800 fasteners be used in high-temperature applications?
Yes, Incoloy 800, 800H, and 800HT fasteners are specifically designed for continuous service in high-temperature environments, up to 1100°F (593°C) for 800HT.
Are Incoloy 800 fasteners compliant with industry standards?
Yes, they are manufactured according to ASTM, ASME, and other international standards for alloy fasteners.

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