Alloy 800H Fasteners handle constant furnace heat better than regular steel bolts. Oshwin Overseas is a leading Incoloy 800H Bolts manufacturer in India, based in Mumbai. Bolts are made to ASTM B564/B408, UNS N08810. DIN 1.4876 Hex bolts, threaded rod, flat washers and stud bolts are all in stock. Ethylene crackers and reformers often use this alloy. Oshwin exports to Canada, UK, Kuwait and Australia.
Grain Size ASTM 5+
Every 800H/HT heat is checked for coarser grain structure.
800H & 800HT Both Stocked
Dual-certifiable material, ready to ship without delay.
(Min, Room Temp)
- Grade
- UNS N08810 / N08811
- Standard
- ASTM B408 / ASME SB408
- Grain Size
- ASTM 5 or coarser
- Service Temp
- Up to ~980°C (800HT)
- MTC
- EN 10204 3.1
- Lead Time
- 2-5 Days
Incoloy 800HT Hex Bolts & Nuts Manufacturer in India, Controlled Grain Size for Creep Strength
UNS N08810 Incoloy 800H Threaded Rod and Stud Bolts - Full Range to ASTM B408
Table of Contents
- Incoloy 800H Bolts Specification - Cold-Headed & Hot-Forged Range
- Every Incoloy 800H/HT Fastener Type We Stock
- UNS N08810/N08811 Incoloy 800H/HT Bolts Chemical Composition
- Incoloy 800H vs Incoloy 800HT Fasteners - Grain Size & Carbon Content
- Incoloy 800HT Hex Bolts Mechanical & High-Temperature Properties
- Incoloy 800H/HT Bolts Equivalent Grades
- Incoloy 800H/HT Hex Bolts & Nuts Torque Formula
- Incoloy 800H/HT Bolt Preload Loss at High Temperature
- Incoloy 800H Anchor Bolts for Concrete Fixing
- Common Incoloy 800H/HT Bolts, Nuts & Stud Bolts Enquiries We Handle
- Applications of Incoloy 800H/HT Bolts & Fasteners
- Incoloy 800H Bolts FAQs
Incoloy 800H Bolts Specification - Cold-Headed & Hot-Forged Range
Oshwin Overseas forges and cold-heads Incoloy 800H/HT fasteners at our Kalamboli, Navi Mumbai plant. Smaller diameters are cold-headed for tighter thread tolerance. Larger stud bolts and anchor bolts go through hot forging before solution annealing.
Incoloy 800H Cold-Headed Bolts
M6-M24 / 1/4″-1″, lengths 10-200mm
Alloy 800HT Hot-Forged Studs & Anchors
M24-M64 / 1″-2.5″, lengths up to 900mm
Solution-Anneal Verified
800HT requires 2100°F (1149°C) minimum per Special Metals spec
Ex-Stock Sizes - Hex Bolts, Stud Bolts & Threaded Rod
Custom cutting is available outside this range. Anchor bolt lengths get confirmed against your embedment depth.
Incoloy 800H Bolts Manufacturer in India - Mumbai, Since 1999
Cold-headed and hot-forged production, both under one roof.
Request Quote NowEvery Incoloy 800H/HT Fastener Type We Stock
Product photography for this grade is in progress at our Mumbai facility. Every type below ships from stock or gets cut to drawing.
UNS N08810/N08811 Incoloy 800H/HT Bolts Chemical Composition
Alloy 800H needs 0.30-1.20% combined Al+Ti. Alloy 800HT tightens that range to 0.85-1.20%. Full heat-wise figures ship on the EN 10204 3.1 certificate.
Incoloy 800H vs Incoloy 800HT Fasteners - Grain Size & Carbon Content for Creep Strength
Incoloy 800HT Hex Bolts Mechanical & High-Temperature Properties
Incoloy 800HT Bolts inherit tighter creep limits than 800H. Room-temperature minimums below apply to both grades' bar stock per ASTM B408.
800HT's higher Al+Ti content raises creep-rupture strength above 700°C compared to 800H. Both grades share the same density and melting range as base Alloy 800.
Incoloy 800H/HT Bolts Equivalent Grades
Incoloy 800H Bolts Supplier in India, Dual-Certifiable Stock
800H and 800HT both ex-stock, ready for immediate dispatch.
Get Supplier QuoteIncoloy 800H/HT Hex Bolts & Nuts Torque Formula
The governing formula is T = K × F × d. Target clamp load is F, while K reflects friction set by the chosen lubricant. Steel and Incoloy 800H/HT bolting both follow this same relationship.
Galling Risk
Nickel-iron-chromium threads gall under dry torque - always lubricate
Anti-Seize
Use a nickel-alloy-rated anti-seize paste on every assembly
Thermal Growth
Match nut and washer alloy so preload doesn't shift with heat
Buyer-Specified Torque
We confirm your own target, like the approx. 20 figure a Huntsville, Alabama buyer specified for a flange joint
Incoloy 800H/HT Bolt Preload Loss at High Temperature
Incoloy 800H Anchor Bolts for Concrete Fixing
High-temperature equipment foundations sometimes need a corrosion-resistant anchor instead of carbon steel.
Common Incoloy 800H/HT Bolts, Nuts & Stud Bolts Enquiries We Handle
Here are recent requirements we've handled for Incoloy 800H/HT Bolts and Nuts.
Incoloy 800H nuts and bolts for a flange connection - UNS N08810, four screws per flange, approx. 20 target torque. Huntsville, Alabama, USA.
Incoloy 800H Hex Bolts, thread up to the head - M6 and M8, 20-40mm long, 10 pieces each size. Poland.
Incoloy 800H anchor bolts to fix directly in concrete - UNS N08810, 5/8″ x 60mm long, 14 pieces. Australia.
Incoloy 800HT hex bolts and nuts - UNS N08811, M12, 100mm long. Saudi Arabia.
Applications of Incoloy 800H/HT Bolts & Fasteners
Furnace & Heat-Treating Fixtures
Ethylene Pyrolysis & Cracking Coils
Petrochemical Process Piping Flanges
Nuclear Steam-Generator Support Hardware
Foundation Anchor Bolts, High-Temp Equipment
Incoloy 800H Bolts Exporter from Mumbai, Distributor Stock Ready
Grain size checked, certificates ready, dispatch within days.
Enquire NowIncoloy 800H/HT Fasteners Value-Added Services
Beyond stock supply, Oshwin offers value-added services on Incoloy 800H/HT fasteners. Our Kalamboli, Navi Mumbai facility handles every step in-house.
Drilling
Tapping
Threading
Chamfering
Turning
Heat Treating
Solution Annealing
Passivation
Oshwin Overseas Manufacturing Capability
Oshwin's production line handles material drawing, annealing, forging and tapping within our own factory. As an Incoloy 800H bolts manufacturer, this in-house control holds tolerance across both grades.
| Process | Size Range | Typical Lengths |
|---|---|---|
| Cold-Headed (800H/HT) | M6-M24 / 1/4″-1″ | 10-200mm |
| Hot-Forged (800H/HT) | M24-M64 / 1″-2.5″ | Up to 900mm |
Incoloy 800H/HT Bolts Standards Compliance
Third-party inspection is available on any order, alongside documented standards compliance and full material traceability.
Our Export Network
Real orders span four continents. Flange hardware goes to Huntsville, Alabama, and hex bolts to Poland. Anchor bolts ship to Australia, hex bolts with nuts to Saudi Arabia. As both manufacturer and exporter, Oshwin ships direct from Mumbai stock.
Middle East
Saudi Arabia
UAE
Qatar
Oman
Kuwait
Southeast & South Asia
Australia
Singapore
South Korea
Malaysia
Thailand
Indonesia
Philippines
Vietnam
Europe & UK
Poland
United Kingdom
Germany
Netherlands
Turkey
Belgium
Americas
USA
Canada
Africa
South Africa
Egypt
Nigeria
Recent Incoloy 800H/HT Bolt Export Supplies
Mumbai
Huntsville, AL
Product: UNS N08810 Nuts & Bolts, Flange Set
Size: 4 screws per flange, approx. 20 target torque
Mumbai
Poland
Product: Incoloy 800H Hex Head Bolts, Thread to Head
Size: M6 & M8, 20-40mm, 10 pcs each size
Mumbai
Australia
Product: UNS N08810 Anchor Bolts, Concrete Fixing
Size: 5/8″ x 60mm, 14 pieces
Mumbai
Saudi Arabia
Product: UNS N08811 Hex Bolts & Nuts
Size: M12, 100mm long
Delivery Estimate From Ready Stock
Mumbai Dispatch
Items already in stock go out packed within 2-5 days
Ocean Freight
Lowest-cost option, transit runs 15-30 days by destination port
Air Freight
Urgent small-batch orders can move in 3-6 days
Confirm Your ETA
Tell us your destination port and we'll confirm a firm ship date
USA20-28 daysPoland18-26 daysAustralia16-24 daysSaudi Arabia10-16 daysFigures are port-to-port by sea freight. A small parcel usually clears faster by air, so ask us directly.
Incoloy 800H Bolts FAQs
Running above 700°C for long periods? Specify 800HT. Staying under 900°C? 800H Bolt is enough. Not sure of your exact temperature? Share it and we'll confirm the right one.
No. 800HT has tighter chemistry limits than 800H. A bolt made to 800H spec simply doesn't qualify for the 800HT certification.
There's no fixed number. These threads gall without lubricant, so we confirm your clamp-load target and thread size first.
Yes. We supplied 5/8 inch anchor bolts to an Australian buyer for direct fixing into a concrete wall. Lengths get cut to embedment depth on request.
M6 to M24 metric and 1/4 inch to 1 inch standard sizes stay ex-stock. Larger stud bolts and anchor bolts are made to drawing.
EN 10204 3.1 mill test certificates ship with every batch. Third-party inspection and NACE MR0175 documentation are available on request.
Tighter aluminum and titanium control keeps the grain structure finer during annealing. That gives 800HT bolts and nuts stronger long-term strength above 700°C.