Incoloy 825 Flanges

Incoloy 825 Flanges are made from nickel-iron-chromium alloy UNS N08825 designed to connect pipes in tough conditions. They resist oxidizing and reducing acids, pitting, and high heat. The alloy contains molybdenum, copper, and titanium, which boost corrosion resistance and strength. Typical chemistry includes 38–46% nickel, 19.5–23.5% chromium, and 22% minimum iron, with copper and titanium for stability. Mechanical values demonstrate good ductility and a tensile strength of 550 MPa and a yield strength of 220 MPa. Metracore Alloys is a reliable supplier and manufacturer, provides these flanges with reliable performance and quality.

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These alloy 825 flanges meet ASTM B564/ASME SB-564 standards and come in sizes from ½” to 48” NB. They are available in pressure classes from 150# to 2500# and dimensions like ANSI/ASME B16.5. Types include slip-on, blind, weld neck, and others. Strong acid resistance, stress corrosion cracking and chloride pitting are important characteristics. Additionally they remain strong at high temperatures up to 1000°F and cryogenic temperatures. The alloy is strong and adaptable because it is non-magnetic, resists sensitization and welds readily.

Applications cover a wide range of industries. In oil and gas, they are used in offshore rigs and sour gas environments. In chemical plants, they handle acids in production and pickling systems. Marine and offshore projects use them in pipelines and cooling systems due to seawater resistance. They are also found in power generation, nuclear plants, and pollution control equipment. Manufacturing involves melting and casting the alloy, followed by forging or casting, heat treatment, machining, and surface finishing for high precision.

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Quality certifications like PMI, NACE MR0175 compliance, and EN 10204/3.1B support each order. To verify dependability, tests include third party inspections and radiography. To stop rust and damage, packaging uses seaworthy wrapping, wooden boxes and pallets. Grade, size and lot information are written on the label of every box. As reputable Incoloy 825 flanges manufacturers in India, we also act as trustworthy suppliers of Incoloy 825 flanges, providing ASTM B564 N08825 / B564 UNS N08825 flanges in secure and long-lasting packaging for customers worldwide.

Incoloy 825 Flanges Specification

Types of Incoloy 825 Flanges

Incoloy 825 Flanges Face Forms

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Technical Details of Incoloy 825 Flanges

Incoloy 825 Flanges Equivalent Grades

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

Chemical Composition of Incoloy 825 Flanges

Grade	Cr	Fe	Ni	C	Mn	Cu	Si	S
Incoloy 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

Mechanical Properties Of Incoloy 825 Flanges

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 %

Dimensions of Incoloy 825 Flanges

NPS (inches)	Bolts Dia (inches)	Bolt Circle (inches)	No. Of Bolts	Dia Of Bolt Holes (inches)	Dia Of Flange (inches)
2	5/8	5	8	0.75	6-1/2
20	1-1/4	27	24	1.38	30-1/2
1/2	1/2	2-5/8	4	0.62	3-3/4
14	1-1/8	20-1/4	20	1.25	23
3	3/4	6-5/8	8	0.88	8-1/4
1-1/4	5/8	3-7/8	4	0.75	5-1/4
18	1-1/4	24-3/4	24	1.38	28
8	7/8	13	12	1	15
1-1/2	3/4	4-1/2	4	0.88	6-1/8
16	1-1/4	22-1/2	20	1.38	25-1/2
2-1/2	3/4	5-7/8	8	0.88	7-1/2
10	1	15-1/4	16	1.12	17-1/2
4	3/4	7-7/8	8	0.88	10
24	1-1/2	32	24	1.62	36
1	5/8	3-1/2	4	0.75	4-7/8
3-1/2	3/4	7-1/4	8	0.88	9
5	3/4	9-1/4	8	0.88	11
12	1-1/8	17-3/4	16	1.25	20-1/2
3/4	5/8	3-1/4	4	0.75	4-5/8
6	3/4	10-5/8	12	0.88	12-1/2
1/4	1/2	2-1/4	4	0.62	3-3/8

Pressure Ratings of Incoloy 825 Flanges

Temp. °C	Class 150	Class 300	Class 400	Class 600	Class 900	Class 1500	Class 2500
-29~38	20.0	51.7	68.9	103.4	155.1	258.6	430.9
50	19.5	51.7	68.9	103.4	155.1	258.6	430.9
100	17.7	51.5	68.7	103.0	154.6	257.6	429.4
150	15.8	50.3	66.8	100.3	150.6	250.8	418.2
200	13.8	48.3	64.5	96.7	145.0	241.7	402.8
250	12.1	46.3	61.7	92.7	139.0	231.8	386.2
300	10.2	42.9	57.0	85.7	128.6	214.4	357.1
325	9.3	41.4	55.0	82.6	124.0	206.6	344.3
350	8.4	40.3	53.6	80.4	120.7	201.1	335.3

Incoloy 825 Flanges Weights Chart

NPS (Nominal Pipe Size)	SORF (Slip On)	NPT (Threaded)	SWRF (Socket Weld)	Loose (Lap Joint)	BLRF (Blind)	WRNR (Weld Neck)
½	1	1	2	1	2	2
¾	2	2	2	2	2	2
1	2	2	2	2	2	3
1¼	3	3	3	3	3	3
1½	3	3	3	3	4	4
2	5	5	5	5	5	6
2½	8	8	8	8	7	10
3	9	9	9	9	9	11.5
3½	11	12	11	11	13	12
4	13	13	13	13	17	16.5
5	15	15	15	15	20	21
6	19	19	19	19	27	26
8	30	30	30	30	47	42
10	43	43	43	43	70	54
12	64	64	64	64	123	88
14	90	90	90	105	140	114
16	106	98	98	140	180	140
18	130	130	130	160	220	165
20	165	165	165	195	285	197
22	185	185	185	245	355	225
24	220	220	220	275	430	268

Manufacturing Process of Incoloy 825 Flanges

Incoloy 825 Flanges Application

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