Incoloy 800HT Round Bar | UNS N08811 | DIN 1.4959

ASTM B166 Incoloy 800HT Round Bar Exporter, 1.4959 Round Bar Manufacturer, JIS Ncf 800Ht Round Bar Distributor, Incoloy 800HT Round Bar Supplier, UNS N08811 Round Bar Stockist.

PM Industries manufactures, supplies, and stocks Incoloy 800HT Round Bar (UNS N08811). It's the highest-specification member of the Incoloy 800 family, developed specifically for long-term service at temperatures above 600°C where creep resistance is the controlling design requirement. Compared to base 800 and 800H, the 800HT specification imposes tighter controls on carbon content (0.06–0.10%) and a minimum requirement on the aluminum plus titanium sum, both of which contribute directly to coarser grain size and better creep rupture strength over extended service periods.

1.4959 Round Bar, Incoloy 800HT Round Bar, UNS N08811 Round Bar, ASTM B166 Incoloy 800HT Round Bar.

The distinction between 800H and 800HT is often misunderstood. Both have controlled carbon for creep performance. The difference is that 800HT adds the Al+Ti requirement, which ensures the alloy has sufficient precipitation-forming elements to support the grain coarsening heat treatment that maximizes creep life. For the most demanding long-term creep applications above 760°C, 800HT is the correct specification. At lower temperatures or shorter service durations, 800H is frequently adequate and sometimes interchangeable.

Creep resistance is the defining property. In continuous high-temperature service where components carry stress over thousands of hours, creep deformation accumulates gradually and eventually leads to dimensional change or rupture. 800HT's controlled composition and resulting microstructure minimize that accumulation, extending the time to creep failure and supporting longer component replacement intervals in furnace and process heater equipment.

Oxidation resistance is reliable throughout the rated service range. The alloy forms a stable chromium-rich oxide in air and combustion environments that limits further surface attack. In thermal cycling applications, where components heat and cool with each production cycle, the oxide remains adherent and continues to provide protection.

Carburization resistance is good and relevant for reformer tubes, ethylene cracking furnace components, and heat treatment fixtures where carbon-rich atmospheres are present. At the extreme upper end of the carburizing temperature range, Alloy 601 or Haynes 230 may offer better resistance, but for moderate carburizing conditions 800HT performs reliably and is the standard specification in many reformer tube applications.

Bar is available in a range of diameters and surface finishes with full material certification to ASTM B408 and applicable specifications. Dual-certified 800H/800HT material is available where project specifications permit. Contact PM Industries for stock availability, dimensions, and pricing.

Specification Incoloy 800HT Round Bar

Specification	ASTM, EN, DIN, JIS, BS, ASME, AISI
Condition	Hardened & tempered, annealed
Length	1 to 6 Meters, Custom Cut Lengths
Round Bars	Outside Diameter in the range of 4mm to 500mm above as per the customer requirement.
Bright Bars	Outside Diameter in the range of 4mm to 500mm above as per the customer requirement.
Hex Bars	18mm – 57mm (11/16″ to 2-3/4″) above as per the requirement.
Square Bars	18mm – 47mm (11/16″ to 1-3/4″) above as per the requirement.
Flat Bars	1/2” to 10” in thickness range of 2mm to 150mm
Finish	Black, Bright Polished, Rough Turned, NO.4 Finish, Matt Finish, BA Finish
Technique	Hot Rolled, Cold Rolled, Cold Drawn, Forged Round Bar, Rod
Tolerance	H8, H9, H10, H11, H12, H13, K9, K10, K11, K12 or as per clients’ requirements
Test Certificates	EN 10204/3.1B, NACE MR0103, NACE MR0175
Raw Materials Certificate	100% Radiography Test Report
Inspection	Third Party Inspection Report, etc

Available Types

800HT Incoloy Round Bar Chemical Composition

Grade	C	Mn	Si	Al	S	Cr	Cu	Ni	Fe
Incoloy 800HT	0.06 – 0.10	1.50 max	1 max	0.15 – 0.60	0.015 max	19.0-23.0	0.75 max	30.0-35.0	39.5 min

Incoloy Alloy 800HT Rods Mechanical Properties

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

Equivalent Grades for 800HT Incoloy Round Bar

STANDARD	WERKSTOFF NR.	UNS	JIS	BS	GOST	AFNOR	EN
Incoloy 800HT	1.4859 / 1.4876	N08811	NCF 800HT	NA 15(HT)	ЭИ670	–	X8NiCrAlTi32-21

Size Chart of alloy 800HT Round Bar

US Bar		Metric		Japanese		Canadian/ASTM
Diameter (Inch)	Size of Bar	Diameter (milimeter)	size of Bar	Diameter (milimeter)	size of Bar	Diameter (milimeter2)	size of Bar
0.375	#3	5.5	5.5	10	10	200	15M
0.25	#2	5	5	6	6	100	10M
0.625	#5	7	7	16	16	500	25M
0.5	#4	6	6	13	13	300	20M
0.875	#7	9	9	22	22	1000	35M
0.75	#6	8	8	19	19	700	30M
1.125	#9	11	11	29	29	2500	55M
1	#8	10	10	25	25	1500	45M
1.375	#11	14	14	35	35
1.25	#10	12	12	32	32
1.625	#13	18	18	41	41
1.5	#12	16	16	38	38
1.875	#15	22	22	48	48
1.75	#14	20	20	44	44
2.25	#18	28	28	57	57
2	#16	25	25	51	51
		36	36
		32	32
		44	44
		40	40
		50	50

Available Stock of Incoloy 800ht Round Bar

Incoloy 800HT Annealed Round Bar	Afnor Shafting Round Bar
1.4959 Normalized Round Bar	EN X8Nicralti32-21 Automotive Round Bar
UNS N08811 Quenched & Tempered Round Bar	ASTM B166 Incoloy 800HT Aerospace Round Bar
JIS Ncf 800Ht Solution Annealed Round Bar	Incoloy 800HT Oil & Gas Round Bar
BS Na 15(Ht) Hardened Round Bar	1.4959 Marine Round Bar
Gost Эи670 Bright Round Bar	UNS N08811 Medical Grade Round Bar
Afnor Polished Round Bar	JIS Ncf 800Ht Hot Rolled Round Bar
EN X8Nicralti32-21 Mirror Finish Round Bar	BS Na 15(Ht) Cold Drawn Round Bar
ASTM B166 Incoloy 800HT Pickled & Passivated Round Bar	Gost Эи670 Cold Rolled Round Bar
Incoloy 800HT Coated / Plated Round Bar	Afnor Forged Round Bar
1.4959 Commercial Round Bar	EN X8Nicralti32-21 Peeled Round Bar
UNS N08811 Precision Round Bar	ASTM B166 Incoloy 800HT Turned Round Bar
JIS Ncf 800Ht Straight Length Round Bar	Incoloy 800HT Ground Round Bar
BS Na 15(Ht) Cut-to-Length Round Bar	1.4959 Centreless Ground Round Bar
Gost Эи670 Structural Round Bar	UNS N08811 Precision Ground Round Bar