Incoloy 800/800H/800HT Bars/Rods

Incoloy 800, 800H, and 800HT bars and rods are nickel-iron-chromium alloys which are particularly suitable for high-temperature strength and resistance against oxidation, carburization, and thermal fatigue. Although the three grades are broadly comparable in base composition, 800H and 800HT contain controlled carbon and aluminum/titanium levels for enhanced creep and stress rupture capability. These bars are applied in heat-treating apparatuses, power generation plants, and chemical processing plants where thermal stress stability over long time is critical. Their superior metallurgical stability and resistance to hostile environments make them suitable for structural applications subjected to cyclic high-temperature service.

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Incoloy 800 Round Bars

Incoloy 800H Rectangular Bars

Incoloy 800H Square Rods

These alloys typically contain 30–35% nickel, 19–23% chromium, and remainder iron. Incoloy 800H and 800HT contain higher carbon (~0.05–0.10%) and controlled Ti/Al for improved high-temp performance. Typical tensile strength is 500–700 MPa; yield strength 200–300 MPa. Excellent oxidation and carburization resistance is maintained through 1100°C. The bars do not lose ductility, resist scaling, and provide excellent stress rupture and creep properties, particularly in 800HT. Weldability and fabricability are excellent for all three forms and hence are very dependable under prolonged heat exposure.

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Incoloy 800/800H/800HT Bars and Rods Specification

Incoloy 800/800H/800HT Bars Specifications

Specification : ASTM B166, A479 / ASME SB166, SA479

Dimension Standard : EN, DIN, JIS, ASTM, BS, ASME, AISI

Incoloy Round Bars: Outside Diameter in the range of 4mm to 500mm

Incoloy Bright Bars : Outside Diameter in the range of 4mm to 200mm

Incoloy Hex Bars : 4mm – 101.6mm

Incoloy Square Bars : 3mm – 100mm

Incoloy Flat Bars : 1/2″ to 10″ in thickness range of 1.6mm to 150mm, Custom Size Stainless Steel Flats available

Finish : Black, Bright Polished, Rough Turned, NO.4 Finish, Matt Finish, BA Finish

Length : 1 to 6 Meters, Custom Cut Lengths

Form : Round, Square, Hex (A/F), Rectangle, Wire (Coil Form), Wire-mesh, Billet, Ingot, Forging Etc.

Chemical Compositions of Incoloy 800/800H/800HT Rods

Grade	C	Mn	Si	S	Cu	Fe	Ni	Cr	Al	Ti
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	0.15 – 0.60	0.15 – 0.60
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	0.15 – 0.60	0.15 – 0.60
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	0.15 – 0.60	0.15 – 0.60

Incoloy 800/800H/800HT Bars Mechanical Properties

Element	Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
Alloy 800 / 800H / 800HT	7.94 g/cm3	1385 °C (2525 °F)	Psi – 75,000 , MPa – 520	Psi – 30,000 , MPa – 205	30 %

Incoloy 800/800H/800HT Bars and Rods Equivalent Grades

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

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Weight Chart of Incoloy 800/800H/800HT Bars and Rods

Incoloy 800 Round bar
Size	Kgs / Foot	Kgs / Mtr	Size	Kgs / Foot	Kgs / Mtr	Size	Kgs / Foot	Kgs / Mtr
3mm	0.017	0.055	20mm	0.753	2.470	3″	10.900	35.762
1/8″	0.019	0.062	22mm	0.908	2.979	3-1/4″	12.800	41.996
5/32″	0.029	0.095	7/8″	0.926	3.038	3-1/2″	14.850	48.772
4mm	0.030	0.098	24mm	1.080	3.543	3-3/4″	17.001	55.780
3/16″	0.043	0.141	25mm	1.180	3.871	4″	19.306	63.340
5mm	0.047	0.154	1″	1.210	3.970	4-1/4″	21.908	72.249
7/32″	0.058	0.190	26mm	1.271	4.170	4-1/2″	24.4487	80.340
6mm	0.068	0.223	27mm	1.368	4.490	4-3/4″	27.366	90.249
1/4″	0.076	0.249	1-1/8″	1.534	5.033	5″	30.461	99.940
7mm	0.091	0.298	30mm	1.691	5.548	5-1/2″	36.690	121.000
5/16″	0.118	0.387	1-1/4″	1.924	6.349	6″	43.860	143.900
8mm	0.120	0.398	32mm	1.894	6.314	6-1/2″	51.093	167.630
9mm	0.152	0.498	1-3/8″	2.303	7.550	7″	59.432	196.000
3/8″	0.170	0.557	35mm	2.390	7.553	7-1/2″	68.226	225.000
10mm	0.189	0.620	36mm	2.438	7.999	8″	77.586	254.55
11mm	0.228	0.748	38mm	2.792	8.903	10″	121.048	397.140
7/16″	0.232	0.761	1-1/2″	2.715	8.951
12mm	0.271	0.889	40mm	3.009	9.872
1/2″	0.303	0.994	1-5/8″	3.200	10.449
13mm	0.318	1.043	1-3/4″	3.712	12.179
14mm	0.368	1.207	45mm	3.807	12.555
9/16″	0.383	1.256	1-7/8″	4.260	13.977
15mm	0.424	1.391	48mm	4.330	14.205
5/8″	0.473	1.551	50mm	4.698	15.414
16mm	0.481	1.578	2″	4.848	15.906
17mm	0.543	1.791	2-1/8″	5.475	17.963
11/16″	0.573	1.880	2-1/4″	6.135	20.128
18mm	0.610	2.001	60mm	6.768	22.205
3/4″	0.682	2.237	2-3/8″	6.838	22.435
			2-1/2″	7.576	24.856
			2-5/8″	8.354	27.409
			2-3/4″	9.169	30.083

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Incoloy 800/800H/800HT Bars and Rods Types

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Frequently Asked Questions (FAQ)

Are Incoloy 800/800H/800HT Bars and Rods Corrosion-Resistant?

Yes, Incoloy 800, 800H, and 800HT bars and rods are highly corrosion-resistant, particularly to oxidation and carburization at high temperatures. They are commonly used in harsh environments such as chemical processing and power generation due to their excellent resistance to sulfur and other corrosive elements.

Can Incoloy 800/800H/800HT Bars and Rods be Customized in Size and Length?

Yes, Incoloy 800, 800H, and 800HT bars and rods can be customized in size and length to meet specific industrial requirements. They are available in various diameters, lengths, and finishes to suit different applications.

How Do Incoloy 800/800H/800HT Bars and Rods Perform in High-Temperature Environments?

Incoloy 800, 800H, and 800HT bars and rods perform exceptionally well in high-temperature environments, maintaining their strength and resistance to oxidation and carburization. They are ideal for applications in furnaces, heat exchangers, and gas turbines.

Incoloy 800/800H/800HT Bars and Rods Uses

They are utilized in petrochemical reformers, heat exchanger bundles, radiant tubes, superheater tubes, and furnace manifolds. Incoloy 800H/800HT is best suited in the high-pressure steam lines and reheater tubing because of excellent creep resistance. They are also used in industrial furnaces, ammonia reformers, and nuclear steam generators. The oxidation resistance of the material is essential for linings of combustion chambers and thermal oxidizers. Under chloride- and sulfur-containing environments, the bars are stable under repeating heating and cooling, providing structure to cracking furnaces and power plant ducts. Their durability under heat and stress conditions for long periods of time makes them indispensable in thermal processing.

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