Incoloy B423 N08825 Tube

1. Standard: ASTM B423、ASTM B407、ASTM B163
2. Diameters: 4.0 - 1219.2 mm
3. Wall thickness: 0.5 to 20mm
4. Equivalent: UNS N08825, Din 2.4858, Incoloy 825

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Product Introduction

ASTM B423 Incoloy 825 Welded and seamless tube manufacturer, supplier

Incoloy 825(N08825,2.4858) is designed to combine the high corrosion resistance of nickel, the oxidation resistance of chromium, and the enhanced protection of molybdenum and copper against specific corrosive environments. Alloy 825 exhibits excellent durability in high temperature oxidizing environments (up to 540°C) and strong acidic media, making it the preferred material for harsh working conditions such as petrochemicals and offshore engineering. HT PIPE is a incoloy 825 Pipe supplier with 15+ export experience. Contact us for more information and quotes for free!

N08825 Tube Corrosion resistance

Incoloy 825 can tolerate up to 50% sulfuric acid in acidic environments, and also performs well in phosphoric acid and nitric acid, especially in mixed acids containing oxidizing ions, where the corrosion rate is extremely low. The combination of nickel and molybdenum effectively inhibits stress corrosion cracking caused by chlorides. The resistance to pitting and crevice corrosion can be evaluated by PREN (pitting equivalent value) to more than 35. Under high-temperature oxidation conditions, the chromium oxide layer formed on the surface can be stably maintained up to 540°C.

Incoloy 825 Pipe Welding

When welding Incoloy 825, a low heat input process is required. Tungsten inert gas welding (TIG) or plasma arc welding is recommended to reduce the heat affected zone. The preheating temperature must be strictly controlled below 100°C, and the interlayer temperature must not exceed 150°C to avoid carbide precipitation in the sensitization temperature range. After welding, local solution treatment is recommended, with a temperature range of 950°C to 980°C, followed by rapid cooling to restore corrosion resistance.

Application of alloy 825 pipe

Oil and gas: submarine pipelines, downhole tools for acid gas wells

Chemical equipment: sulfuric acid reactors, phosphoric acid evaporators, pickling equipment

Nuclear industry: containers and pipelines for nuclear waste treatment systems

Marine engineering: seawater desalination devices, heat exchangers

Environmental protection: key components of flue gas desulfurization (FGD) systems.

Incoloy 825 pipe Specifications

Specifications	ASTM B423/ ASTM SB 423, ASTM B407/ ASTM SB 407, ASTM B163/ ASTM SB 163
Type	Seamless / EFW / ERW / Welded / Fabricated / CDW
Size	15"NB TO 150"NB IN
Length	Single Random, Double Random & Required Length
Standards	ASTM, ASME, and API
Schedule	SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
End	Plain End, Beveled End, Treaded
Form	Round Pipes/Tubes, Hydraulic Tubes Coiled Tubes, "U" Shape, Pan Cake Coils

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ASTM B423 UNS N08825 Chemical Composition

Grade	Cr	Fe	Ni	C	Mn	Cu	Si	S
Inconel 825	19.5 – 23.5	1.0 max	38.0 – 46.0	0.05 max	1.0 max	1.5 – 3.0	0.5 max	0.03 max

Alloy 825 Pipe & Tube Mechanical Properties

Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
8.47 g/cm3	1413 °C (2580 °F)	Psi – 95,000 , MPa – 655	Psi – 45,000 , MPa – 310	40%

Incoloy 825 Seamless Pipes Equivalent Grade

STANDARD	WERKSTOFF NR.	UNS	AFNOR	GOST	JIS	BS	EN	OR
Inconel / Incoloy	2.4858	N08825	NC 21 FeDU	XH38BT	NCF 825	NA 16	NiCr21Mo	ЭП703

manufacturing process of Alloy N08825 tube

Hot Rolling

Hot working of n08825 pipe is carried out in the range of 1100℃ to 1200℃ for hot extrusion or piercing rolling, and the deformation rate needs to be precisely controlled to avoid cracking.

Cold Rolling

The cold working stage achieves high dimensional accuracy through multiple cold drawing or cold rolling. The deformation amount of each pass is usually not more than 20%, and annealing treatment is required in the middle to eliminate work hardening.

heat treatment

Solution heat treatment is kept in the range of 925℃ to 980℃ and then quenched in water to completely dissolve the carbides and restore the austenite single-phase structure. The surface treatment uses a nitric acid-hydrofluoric acid mixed solution pickling to remove the oxide scale formed by hot working, and then passivation treatment is performed to enhance the surface corrosion resistance.

Incoloy 825 Welded tube Thickness & Dimensions

NOMINAL SIZE [INCHES]	OUTSIDE DIAMETER (OD) [INCHES]	OUTSIDE DIAMETER (OD) [MM]	WALL THICKNESS [INCHES]	WALL THICKNESS [MM]	WEIGHT [LB/FT]	WEIGHT [KG/M]
1/8" NPS 6	0.41	10.3	0.068	1.73	0.24	0.37
1/4" NPS 8	0.54	13.7	0.088	2.24	0.42	0.63
3/8" NPS 10	0.68	17.1	0.091	2.31	0.57	0.84
1/2" NPS 15	0.84	21.3	0.109	2.77	0.85	1.27
3/4" NPS 20	1.05	26.7	0.113	2.87	1.13	1.69
1" NPS 25	1.32	33.4	0.133	3.38	1.68	2.5
1 1/4" NPS 32	1.66	42.2	0.14	3.56	2.27	3.39
1 1/2" NPS 40	1.9	48.3	0.145	3.68	2.72	4.05
2" NPS 50	2.375	60.3	0.154	3.91	3.65	5.44
2 1/2" NPS 65	2.875	73	0.203	5.16	5.79	8.63
3" NPS 80	3.5	88.9	0.216	5.49	7.58	11.29
3 1/2" NPS 90	4	101.6	0.226	5.74	9.11	13.57
4" NPS 100	4.5	114.3	0.237	6.02	10.79	16.07
5" NPS 125	5.563	141.3	0.258	6.55	14.62	21.77
6" NPS 150	6.625	168.3	0.28	7.11	18.97	28.26
8" NPS 200	8.625	219.1	0.322	8.18	28.55	42.55
10" NPS 250	10.75	273	0.365	9.27	40.48	60.31
12" NPS 300	12.75	323.8	0.406	10.31	53.52	79.73
14" NPS 350	14	355.6	0.437	11.13	54.57	94.55
16" NPS 400	16	406.4	0.5	12.7	82.77	123.3
18" NPS 450	18	457	0.562	14.27	104.67	155.8
20" NPS 500	20	508	0.594	15.09	123.11	183.42
24" NPS 600	24	610	0.688	17.48	171.29	255.41
32" NPS 800	32	813	0.688	17.48	230.08	342.91

UNS N08825 Pipe working pressure

	WALL THICKNESS OF TUBE (INCHES)
(IN.)	0.028	0.035	0.049	0.065	0.083	0.095	0.109	0.12
	WORKING PRESSURE (PSIG)
1/8	7900	10100
1/4	3700	4800	7000	9500
5/16		3700	5400	7300
3/8		3100	4400	6100
1/2		2300	3200	4400
3/4			2200	3000	4000	4600
1				2200	2900	3400	3900	4300