When high temperature strength at 593 °C or higher is the critical design parameter, process engineers will call for Incoloy 800H Pipe Fittings, substituting it for standard Incoloy 800. Amardeep Steel Centre is a reliable Incoloy 800H fittings manufacturer and Incoloy 800H pipe fittings supplier, readily stocked with all the standard size and schedule of ASTM B366 UNS N08810 fittings. EN 10204 3.1 MTCs with controlled verification of grain size are available in our 800H inventory, which meets the requirements of ASME Sect. VIII Div. 1 pressure vessel code allowable stress tables. Alloy 800H fittings are dual certified for aluminium and titanium composition, offering procurement flexibility for petrochemicals.
Request a QuoteASTM B366 UNS N08810 Pipe Fittings Specifications
Parameter | Details |
Specification | ASTM B366 / ASME SB366 |
UNS No. | N08810 |
Werkstoff No. | 1.4958 |
Size Range (BW) | 1/2" NB to 48" NB |
Schedules | SCH 10 to XXS |
Grain Size | ASTM No. 5 or coarser (annealed) |
Dimension Standards | ASME B16.9, MSS SP-43, ASME B16.11 |
Form | Seamless & Welded; Solution Annealed |
MTC | EN 10204 3.1 |
Types of Incoloy 800H Pipe Fittings
Fitting | Description | Standard |
Incoloy 800H Elbow | 45° / 90° LR & SR; 180° return | ASME B16.9 |
Incoloy 800H Tee | Equal & reducing tees | ASME B16.9 |
Incoloy 800H Reducer | Concentric & eccentric reducers | ASME B16.9 |
End Cap | Pipe end closures | ASME B16.9 |
Stub End | Lap joint assembly stub ends | MSS SP-43 |
Socket Weld Fittings | Elbows, tees, couplings | ASME B16.11 |
Threaded Fittings | NPT elbows, tees, nipples | ASME B16.11 |
Source Incoloy 800H Fittings from Amardeep Steel Submit your specs to info@amardeepsteel.com — Fast Quote, Ready Stock |
Incoloy 800H Chemical Composition
Ni | Cr | Fe (min) | Al | Ti | C |
30–35% | 19–23% | 39.5% | 0.15–0.60% | 0.15–0.60% | 0.05–0.10% |
Incoloy 800H Mechanical Properties
UTS (MPa) | 0.2% YS (MPa) | Elongation (%) | Hardness (Rb max) |
517 min | 207 min | 30 min | 90 |
Equivalent Grades of Incoloy 800H
UNS | W.Nr. | DIN | EN | Common Name |
N08810 | 1.4958 | X8NiCrAlTi32-21 | X8NiCrAlTi32-21 | Alloy 800H |
Inconel 800H Pipe Fittings – Reducer Buttweld Dimensions Chart
NPS (inch) | Cap Length (inch) | Cross Centre-to-End (inch) | OD (mm) | OD (inch) | Tee Centre-to-End (inch) | Stub End Long Length (inch) | Stub End Short Length (inch) | Stub End Lap Diameter (inch) |
1/2 | 1 | – | 21.3 | 0.840 | 1 | 3 | 2 | 1 3/8 |
3/4 | 1 | – | 26.7 | 1.050 | 1 1/8 | 3 | 2 | 1 11/16 |
1 | 1 1/2 | 1 1/2 | 33.4 | 1.315 | 1 1/2 | 4 | 2 | 2 |
1 1/4 | 1 1/2 | 1 7/8 | 42.2 | 1.660 | 1 7/8 | 4 | 2 | 2 1/2 |
1 1/2 | 1 1/2 | 2 1/4 | 48.3 | 1.900 | 2 1/4 | 4 | 2 | 2 7/8 |
2 | 1 1/2 | 2 1/2 | 60.3 | 2.375 | 2 1/2 | 6 | 2 1/2 | 3 5/8 |
2 1/2 | 1 1/2 | 3 | 73.0 | 2.875 | 3 | 6 | 2 1/2 | 4 1/8 |
3 | 2 | 3 3/8 | 88.9 | 3.500 | 3 3/8 | 6 | 2 1/2 | 5 |
3 1/2 | 2 1/2 | 3 3/4 | 101.6 | 4.000 | 3 3/4 | 6 | 3 | 5 1/2 |
4 | 2 1/2 | 4 1/8 | 114.3 | 4.500 | 4 1/8 | 6 | 3 | 6 3/16 |
5 | 3 | 4 7/8 | 141.3 | 5.563 | 4 7/8 | 8 | 3 | 7 5/16 |
6 | 3 1/2 | 5 5/8 | 168.3 | 6.625 | 5 5/8 | 8 | 3 1/2 | 8 1/2 |
8 | 4 | 7 | 219.1 | 8.625 | 7 | 8 | 4 | 10 5/8 |
10 | 5 | 8 1/2 | 273.1 | 10.750 | 8 1/2 | 10 | 5 | 12 3/4 |
12 | 6 | 10 | 323.9 | 12.750 | 10 | 10 | 6 | 15 |
Inconel 800H Pipe Fittings – Elbow Dimension Table (ASTM B366)
NPS (inch) | OD (mm) | OD (inch) | 90° LR Centre-to-Face (inch) | 90° SR Centre-to-Face (inch) | 45° LR Centre-to-Face (inch) | 180° LR Radius (inch) | 180° LR Centre-to-Centre (inch) | 180° LR Back-to-Face (inch) |
1/2 | 21.3 | 0.840 | 1 1/2 | – | 5/8 | – | 2 | 1 7/8 |
3/4 | 26.7 | 1.050 | 1 1/8 | – | 7/16 | – | 2 1/4 | 1 11/16 |
1 | 33.4 | 1.315 | 1 1/2 | 1 | 7/8 | – | 3 | 2 3/16 |
1 1/4 | 42.2 | 1.660 | 1 7/8 | 1 1/4 | 1 | – | 3 3/4 | 2 3/4 |
1 1/2 | 48.3 | 1.900 | 2 1/4 | 1 1/2 | 1 1/8 | 3 | 4 1/2 | 3 1/4 |
2 | 60.3 | 2.375 | 3 | 2 | 1 3/8 | 4 | 6 | 4 3/16 |
2 1/2 | 73.0 | 2.875 | 3 3/4 | 2 1/2 | 1 3/4 | 5 | 7 1/2 | 5 3/16 |
3 | 88.9 | 3.500 | 4 1/2 | 3 | 2 | 6 | 9 | 6 1/4 |
3 1/2 | 101.6 | 4.000 | 5 1/4 | 3 1/2 | 2 1/4 | 7 | 10 1/2 | 7 1/4 |
4 | 114.3 | 4.500 | 6 | 4 | 2 1/2 | 8 | 12 | 8 1/4 |
5 | 141.3 | 5.563 | 7 1/2 | 5 | 3 1/8 | 10 | 15 | 10 5/16 |
6 | 168.3 | 6.625 | 9 | 6 | 3 3/4 | 12 | 18 | 12 5/16 |
8 | 219.1 | 8.625 | 12 | 8 | 5 | 12 | 24 | 16 5/16 |
10 | 273.1 | 10.750 | 15 | 10 | 6 1/4 | 15 | 30 | 20 3/8 |
12 | 323.9 | 12.750 | 18 | 12 | 7 1/2 | 18 | 36 | 24 3/8 |
Inconel 800H Pipe Fittings – Tee Size Chart (ASTM B366 UNS N08810)
Product | Size | Wall Thickness | Welded | Seamless |
Cap | 1/2" – 80" | SCH 10S – SCH 160 | – | ✓ |
Tee | 1/2" – 24" | SCH 10S – XXS | ✓ | ✓ |
Tee | 8" – 104" | SCH 5S – 80S/XS | ✓ | – |
Elbow | 1/2" – 24" | SCH 10S – XXS | ✓ | ✓ |
Elbow | 8" – 104" | SCH 5S – 80S/XS | ✓ | – |
Reducer | 1/2" – 24" | SCH 10S – XXS | ✓ | ✓ |
Reducer | 8" – 104" | SCH 5S – 80S/XS | ✓ | – |
Lap Joint Stub End | 1/2" – 24" | SCH 5S – 80S/XS | ✓ | ✓ |
Lap Joint Stub End | 8" – 80" | SCH 5S – 80S/XS | ✓ | – |
Inconel 800H Pipe Fittings – Hardness & Physical Properties
Property | Value |
Curie Temperature | -115°F |
Permeability at 200 Oersted | 1.014 (15.9 kA/m) |
Thermal Conductivity | 11.5 A, Btu·in/ft²·h·°F (W/m·°C) |
Yield Strength | 205 MPa |
Specific Heat | 460 Btu/lb·°F (J/kg·°C) |
Melting Point | 1357°C (1385°F) |
Elongation | 30%–35% |
Electrical Resistivity | 0.989 ohm·circ mil/ft (µΩ·m) |
Inconel 800H Pipe Fittings – Pressure Rating Chart
Temperature (°F) | Temperature (°C) | Class 150 |
-20 to 150 | -29 to 66 | 300 |
200 | 93 | 265 |
250 | 121 | 225 |
300 | 149 | 185 |
350 | 177 | 150 |
400 | 204 | – |
450 | 232 | – |
500 | 260 | – |
550 | 288 | – |
Inconel 800H Pipe Fittings – Lateral Tee Weight Chart
DN | Sch 80S 90° Elbow | Sch 80S 45° Elbow | Sch 80S Equal Tee | Sch 10S 45° Elbow | Sch 10S Equal Tee | Sch 10S 90° Elbow | Sch 40S 45° Elbow | Sch 40S Equal Tee | Sch 40S 90° Elbow |
8 | 0.04 | 0.03 | 0.07 | 0.02 | 0.01 | 0.03 | 0.03 | 0.02 | 0.06 |
10 | 0.06 | 0.04 | 0.09 | 0.03 | 0.02 | 0.05 | 0.03 | 0.02 | 0.03 |
15 | 0.10 | 0.05 | 0.14 | 0.06 | 0.03 | 0.09 | 0.08 | 0.04 | 0.10 |
20 | 0.11 | 0.05 | 0.20 | 0.07 | 0.03 | 0.13 | 0.08 | 0.04 | 0.17 |
25 | 0.22 | 0.14 | 0.38 | 0.14 | 0.08 | 0.28 | 0.15 | 0.11 | 0.29 |
32 | 0.40 | 0.23 | 0.68 | 0.23 | 0.11 | 0.49 | 0.26 | 0.17 | 0.59 |
40 | 0.51 | 0.29 | 1.02 | 0.30 | 0.17 | 0.68 | 0.40 | 0.23 | 0.86 |
50 | 0.91 | 0.59 | 1.59 | 0.50 | 0.25 | 0.85 | 0.70 | 0.40 | 1.28 |
65 | 1.81 | 0.99 | 3.13 | 0.85 | 0.48 | 1.41 | 1.40 | 0.77 | 2.19 |
80 | 2.97 | 1.50 | 4.45 | 1.25 | 0.63 | 1.77 | 2.20 | 1.08 | 3.31 |
90 | 4.00 | 2.00 | 5.44 | 1.70 | 0.75 | 2.67 | 2.83 | 1.42 | 4.08 |
100 | 6.18 | 2.81 | 7.71 | 2.10 | 1.08 | 3.46 | 4.47 | 2.09 | 5.27 |
150 | 16.32 | 8.16 | 13.61 | 5.45 | 2.72 | 8.07 | 10.89 | 5.44 | 10.99 |
200 | 33.11 | 16.56 | 28.12 | 10.20 | 5.33 | 15.65 | 21.54 | 10.77 | 20.91 |
250 | 51.71 | 25.86 | 49.90 | 18.15 | 9.75 | 26.46 | 38.56 | 19.27 | 35.38 |
300 | 79.38 | 39.69 | 83.91 | 25.80 | 13.62 | 39.46 | 59.42 | 29.71 | 62.14 |
Inconel 800H Pipe Fittings – Reducer Tolerance Chart
ASME B16.9 NPS | ID at End | OD at Bevel | Wall Thickness T | Overall Length H | Centre-to-End A, C, B | Overall Length F |
1/2 – 2 1/2 | +0.06 / -0.03 | +0.06 | Not less than 87.5% of nominal | ±0.06 | ±0.06 | ±0.12 |
3 – 3 1/2 | ±0.06 | ±0.06 | – | – | – | ±0.12 |
4 | ±0.06 | ±0.06 | – | – | – | ±0.12 |
5 – 8 | ±0.06 | ±0.06 | – | – | – | ±0.25 |
10 – 18 | ±0.12 | +0.16 / -0.12 | ±0.09 | ±0.09 | ±0.09 | ±0.25 |
20 – 24 | ±0.19 | +0.25 / -0.19 | – | – | – | ±0.25 |
26 – 30 | ±0.19 | +0.25 / -0.19 | – | – | – | ±0.38 |
32 – 48 | ±0.19 | +0.25 / -0.19 | – | – | – | ±0.38 |
Applications of Incoloy 800H Pipe Fittings
- Catalytic steam reformers: primary and secondary reformer header fittings operating at 800–950 °C
- Ethylene cracking furnaces: transfer line exchanger piping, crossovers, and process gas headers
- Power plant heat exchangers: steam generators, superheater connections — primary application for Incoloy 800H fittings manufacturer grade
- Thermal processing: carburizing retort piping, annealing furnace connections above 650 °C
- Petrochemical plants: reactor outlet fittings, hot gas distribution headers
Frequently Asked Questions
Q: What differentiates Incoloy 800H from standard Incoloy 800 fittings?
A: Incoloy 800H (N08810) has a controlled carbon range of 0.05–0.10% and a larger grain size, giving it significantly better creep and stress-rupture strength above 593 °C compared to standard Incoloy 800.
Q: What are the main applications of Incoloy 800H Pipe Fittings?
A: Incoloy 800H fittings are used in high-temperature chemical reactors, steam reformers, hydrogen production units, power plant heat exchangers, and ethylene pyrolysis systems operating above 593 °C.
Q: What ASTM standard covers Incoloy 800H Pipe Fittings?
A: Incoloy 800H Pipe Fittings are produced per ASTM B366 UNS N08810, dimensioned to ASME B16.9 and ASME B16.11, with grain size controlled per ASTM standards to maximise creep-rupture strength.
Q: Are Incoloy 800H fittings NACE compliant?
A: Incoloy 800H fittings can be supplied with NACE MR0175 compliance for sour service, with hardness controlled below 35 HRC as required for HIC and SSC resistant service in oil and gas environments.
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