Inconel 800HT Flanges | Nickel Alloy 800HT Flange Supplier & Manufacturer

Name: Inconel 800HT Flanges | Nickel Alloy 800HT Flange Supplier & Manufacturer
Brand: Solitaire Overseas

Inconel 800HT Flanges Supplier, Manufacturer & Exporter

Solitaire Overseas is a major manufacturer, supplier, and exporter of the Inconel 800HT Flanges (UNS N08811) manufactured as Inconel 800HT Flange as per the ASTM B564 specifications. Our Nickel Alloy 800HT Flange is included in our complete Inconel 800 Flanges portfolio, and will feature the highest creep and stress rupture strength in our 800-series alloy family and service to extreme high temperatures up to 1200degF (649degC). Very fine-tuned aluminum plus titanium content (Al+Ti [?] 0.85%) in UNS N08811 further enhances microstructural stability in UNS N08811, over that of 800H. Is made in all standard types of flange and pressure classes of 150# to 2500#, sizes between 1/2 and 60, RF, FF and RTJ face types. We are fully traceable NACE MR0175, ISO 9001:2015 and third party certified exporters. Every order contains Mill Test Certificates according to EN 10204 3.1 / 3.2. Check out our Inconel 800 Pipe Fittings and Inconel 800HT Buttweld Fittings to have complete compatibility in the system.

Why Choose Solitaire Overseas for Nickel Alloy 800HT Flanges?

ASTM B564 / ASME SB564 certified with NACE MR0175 traceability
ISO 9001:2015 quality management system with rigorous in-house testing
Available in all types: Slip On, Weld Neck, Blind, Socket Weld, Threaded, Lap Joint, RTJ
Dimension standards: ANSI/ASME B16.5, B16.47 Series A & B, B16.48, DIN, EN-1092
Third-party inspection by TUV, SGS, Bureau Veritas, Intertek available
Stock and indent supply for urgent and project-based requirements
Custom heat treatment (solution annealing) and non-standard sizes on request
Competitive Inconel 800HT Flanges price with export to 45+ countries

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Inconel 800HT Flanges Size & Specification

Parameter	Details
Product Name	Inconel 800HT Flanges
Specification	ASTM / ASME SB 564 / 160 / 472
Inconel UNS Grade	Inconel 600 (UNS N06600), Inconel 601 (UNS N06601), Inconel 625 (UNS N06625), Inconel 800 (UNS N08800)
Flanges Standard	ANSI, ASME, BS, DIN, EN
Size	½" to 36"
Dimensions	ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS 4504, BS 10, EN 1092, DIN
Class / Pressure	150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64
Standards	ASTM, ASME
Designation	B564, SB 564

Incoloy 800HT Grade Details

Parameter	Value
Standards	Incoloy 800H / 800HT
UNS	N08800 / N08810 / N08811
Werkstoff Nr.	1.4876 / 1.4958 / 1.4959

ASTM B564 Inconel 800HT Flanges Chemical Composition (%)

Element	800	800H	800HT
Ni	30–35	30–35	30–35
Fe	39.5 min	39.5 min	39.5 min
Cr	19–23	19–23	19–23
Cu	0.75 max	0.75 max	0.75 max
Ti	0.15–0.60	0.15–0.60	0.25–0.60
Al	0.15–0.60	0.15–0.60	0.85–1.20
C	0.10 max	0.05–0.10	0.06–0.10
Mn	1.5 max	1.5 max	1.5 max
S	0.015 max	0.015 max	0.015 max
Si	1.0 max	1.0 max	1.0 max

ASTM B564 Inconel 800HT Flanges Mechanical & Physical Properties

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

Types of Inconel 800HT Flanges

Inconel 800HT Threaded Flanges
Inconel 800HT Weld Neck Flanges
Inconel 800HT Slip On Flanges
Inconel 800HT Socket Weld Flanges
Inconel 800HT Blind Flanges
Inconel 800HT Lap Joint Flanges
Inconel 800HT Plate Flanges
Inconel 800HT Reducing Flanges
Inconel 800HT Orifice Flanges
Inconel 800HT Nipo Flanges
Inconel 800HT Weldo Flanges
Inconel 800HT Long Weld Neck Flanges
Inconel 800HT SWRF Flanges
Inconel 800HT SORF Flanges
Inconel 800HT Flat Flanges
Inconel 800HT Loose Flanges

Inconel 800HT Square Flanges
Inconel 800HT Expander Flanges
Inconel 800HT Ring Type Joint (RTJ) Flanges
Inconel 800HT BLRF Flanges
Inconel 800HT Groove & Tongue Flanges
Inconel 800HT High Hub Blind Flanges
Inconel 800HT Spectacle Blind Flanges
Inconel 800HT Weld Neck Flanges Series A & B
Inconel 800HT Spade & Ring Spacer Flanges
Inconel 800HT Screwed Flanges
Inconel 800HT Lip Type Flanges
Inconel 800HT WNRF Flanges
Inconel 800HT Flange Facing Types & Finishes
Inconel 800HT Puddle Flanges
Inconel 800HT – Complete Range at a Glance

Why Choose Nickel Alloy 800HT Flanges for Critical Applications?

The best specification of the 800-series is ASTM B564 Inconel 800HT Flanges which has a stricter carbon (0.06-0.10) and minimum Al+Ti of 0.85%. This provides additional enhanced creep and stress rupture strength compared to 800H, and Alloy 800HT Flanges is the material of choice in nuclear heat exchangers, coal gasification lines and steam superheaters. Excellent oxidation, carburization and nitridation resistance is also offered by the nickel-iron-chromium composition at even cyclic thermal conditions. It is also highly useful in long-duration industrial operations since it has good weldability and can be used in high-pressure piping systems.

Applications of Alloy 800HT Flanges

Nuclear and thermal power plant heat exchangers
Coal gasification and steam superheater piping
Ethylene pyrolysis and catalytic reforming systems
High-temperature chemical processing lines
Industrial furnaces and radiant tube applications

Inconel 800HT Flanges – Price List (Request on Quote)

Pricing for ASTM B564 Inconel 800HT Flanges varies by type, size, and order quantity. Request a competitive quote from Solitaire Overseas.

Product Type	Size Range	Price
Alloy 800HT Weld Neck Flange (WNRF)	½" – 60"	Request on Quote
Alloy 800HT Slip On Flange (SORF)	½" – 60"	Request on Quote
Alloy 800HT Blind Flange (BLRF)	½" – 60"	Request on Quote
Alloy 800HT Socket Weld Flange (SWRF)	½" – 4"	Request on Quote
Alloy 800HT RTJ Flange	½" – 24"	Request on Quote
Alloy 800HT Threaded Flange	½" – 4"	Request on Quote

Frequently Asked Questions – Inconel 800HT Flanges

Q1: What is UNS N08811?

UNS N08811 is the designation for Inconel 800HT — a nickel-iron-chromium alloy with ≥0.85% Al+Ti for maximum high-temperature creep strength.

Q2: What is the difference between Inconel 800H and 800HT?

800HT (N08811) has tighter carbon (0.06–0.10%) and higher Al+Ti (≥0.85%) than 800H, giving it superior long-term creep strength.

Q3: What temperatures can ASTM B564 Inconel 800HT Flanges withstand?

Alloy 800HT Flanges are rated for continuous service up to 649°C (1200°F) with excellent resistance to oxidation and nitridation.

Q4: Are Nickel Alloy 800HT Flanges NACE compliant?

Yes. Solitaire Overseas supplies Inconel 800HT Flanges with full NACE MR0175 traceability and MTC per EN 10204 3.1/3.2.

Q5: What flange types are available in Alloy 800HT?

We supply Slip On, Weld Neck, Blind, Socket Weld, Threaded, Lap Joint, RTJ, Spectacle Blind, and Orifice types in Alloy 800HT Flanges.

Get a Quote for Inconel 800HT Flanges

Looking for pricing on ASTM B564 Inconel 800HT Flanges? Send us your type, size, pressure class, and quantity—we'll get back with a quote and lead time within 24 hours. Stock available for quick dispatch.