Copper Nickel 70/30 Flanges | ASTM B151 UNS C71500 Manufacturer

Name: Copper Nickel 70/30 Flanges | ASTM B151 UNS C71500 Manufacturer
Brand: Solitaire Overseas

Copper Nickel 70/30 Flanges Manufacturer, Supplier & Exporter

Solitaire Overseas is a well known manufacturer, supplier and exporter of Copper Nickel 70/30 Flanges which is also being sold as CuNi 70/30 Flanges that meet ASTM B151 / UNS C71500. We have the Weld Neck, Slip On, Blind, Socket Weld, Lap Joint, Threaded and Ring Type Joint flanges. The flanges are characterized by excellent resistance to corrosion in seawaters hence suitable to be used in the sea and offshore.

They go hand in hand with our Copper Nickel 70/30 Fittings, Copper Nickel 90/10 Flanges, andCopper Nickel 70/30 Pipes. . Contact our team and receive the best price on copper nickel 70/30 flanges.

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Copper Nickel 70/30 Flanges Specifications

Parameter	Details
Grade	Copper Nickel 70/30
Material Designations	UNS C71500, CDA 715, DIN 2.0882, WNR 2.0882
Standard	ASTM B151, ASME SB151
Class / Pressure Rating	Class 150 to 2500 lbs; PN6 to PN100
Size Range	1/2" to 48"
NPS	1/2" to 48"
Schedule	Sch 5 to XXS
Dimensions	ANSI/ASME B16.5, ASME B16.47, DIN, EN 1092-1, BS 4504, BS 10
Dimensional Standards	ASME B16.47 Series A & B, MSS SP44, ASME B16.5
Flange Face Types	Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ)
Thread Types	FNPT, NPT, MNPT, BSPT, BSPP
Manufacturing Method	Forged
Production Process	Cutting, Forging, Rolling, Casting
Surface Finish	Spiral / Concentric, Mirror, Serrated, Smooth
Types Available	Slip On, Socket Weld, Blind, Weld Neck, Lap Joint, Threaded
Testing	Pressure Test, Tensile Test, PMI, Hardness Test
Supporting Materials	Gaskets, Flange Bolts, Ring Joint
Physical Properties	Density: 8.95 kg/dm³
Melting Point: 1170 – 1240 °C
Temperature Range: 927 – 1038 °C (1700 – 1900 °F)
Life Span: 50 Years
Origin	European, Indian, Japanese
Compliance	NACE MR0175 / MR0103, ISO 15156, Sour Service
Documentation	MTC, 100% Radiography Test Report, Third Party Inspection
Applications	Seawater, Oil Field Projects, Power Generation, Shipbuilding, Marine
Packing	Wooden Boxes, Bubble Wrap, Custom Packing
HS Code	74122090

Cupro Nickel 70/30 Flange Sizes

NPS (inch)	Flange Dia (inch)	Bolt Dia (inch)	No. of Bolts	Bolt Circle (inch)	Bolt Hole Dia (inch)
1/4	3 3/8	1/2	4	2 1/4	0.62
1/2	3 1/2	1/2	4	2 3/8	0.62
3/4	3 7/8	1/2	4	2 3/4	0.62
1	4 1/4	1/2	4	3 1/8	0.62
1 1/4	4 5/8	1/2	4	3 1/2	0.62
1 1/2	5	1/2	4	3 7/8	0.62
2	6	5/8	4	4 3/4	0.75
2 1/2	7	5/8	4	5 1/2	0.75
3	7 1/2	5/8	4	6	0.75
3 1/2	8 1/2	5/8	8	7	0.75
4	9	5/8	8	7 1/2	0.75
5	10	3/4	8	8 1/2	0.88
6	11	3/4	8	9 1/2	0.88
8	13 1/2	3/4	8	11 3/4	0.88
10	16	7/8	12	14 1/4	1
12	19	7/8	12	17	1
14	21	1	12	18 3/4	1.12
16	23 1/2	1	16	21 1/4	1.12
18	25	1 1/8	16	22 3/4	1.25
20	27 1/2	1 1/8	20	25	1.25
24	32	1 1/4	20	29 1/2	1.38

Cupro Nickel 70/30 Blind Flanges Dimensions

Pipe Dia	Thk (min)	OD	RF Dia	Hub Dia	Thread Length	Hub Length (Y)	LB	KG
1/2"	15	89	35.10	30.20	15.70	15.70	0.9	0.4
1"	25	108	50.80	49.30	17.50	17.50	1.8	0.8
2"	50	152.50	91.90	77.70	25.40	25.40	5.1	2.3
3"	80	190.50	127	108	30.20	30.20	9	4.1
4"	100	228.50	157.20	134.90	33.30	33.30	13	5.9
6"	150	279.50	215.90	192	39.60	39.60	18.5	8.4
8"	200	343	269.70	246.10	44.50	44.50	28.6	13
10"	250	406.50	323.90	304.80	49.30	49.30	39.5	18
12"	300	482.50	381	365.30	55.60	55.60	64	29
16"	400	597	469.90	457.20	63.50	63.50	103	47
20"	500	698.50	584.20	558.80	73.20	73.20	167	76
24"	600	813	692.20	663.40	82.60	82.60	214	97

Cu-Ni 70/30 Slip On Flanges – Weight Chart

Pipe Size	SORF	SWRF	NPT	Lap Joint	Weld Neck	Blind
1/2	1	2	1	1	2	2
1	2	2	2	2	3	2
2	5	5	5	5	6	5
3	9	9	9	9	11.5	9
4	13	13	13	13	16.5	17
6	19	19	19	19	26	27
8	30	30	30	30	42	47
10	43	43	43	43	54	70
12	64	64	64	64	88	123
16	106	98	98	140	140	180
20	165	165	165	195	197	285
24	220	220	220	275	268	430

Schedule Chart of Cu-Ni 70/30 Flange (Sample Standard Sizes)

NPS	OD	SCH-10	STD	SCH-40	SCH-80	SCH-160
1/2	0.84	0.083	0.109	0.109	0.147	0.188
1	1.315	0.109	0.133	0.133	0.179	0.25
2	2.375	0.109	0.154	0.154	0.218	0.344
3	3.5	0.12	0.216	0.216	0.3	0.438
4	4.5	0.12	0.237	0.237	0.337	0.531
6	6.625	0.134	0.28	0.28	0.432	0.719
8	8.625	0.148	0.322	0.322	0.5	0.906
10	10.75	0.165	0.365	0.365	0.594	1.125
12	12.75	0.18	0.375	0.406	0.688	1.312

HS Code – ASTM B151 UNS C71500 Forged Flanges

Product Description	HS Code
70/30 Copper Nickel Flanges	74122090

Gasket Chart of Cu-Ni 70/30 Spectacle Blind Flange

Pipe Size	Gasket ID	Gasket OD	900 LB	600 LB	400 LB	300 LB	150 LB
1/2	0.84	2.50	2.125	2.125	2.125	2.125	1.875
3/4	1.06	2.75	2.625	2.625	2.625	2.625	2.25
1	1.31	3.125	2.875	2.875	2.875	2.875	2.625
1 1/4	1.66	3.50	3.25	3.25	3.25	3.25	3
1 1/2	1.91	3.875	3.75	3.75	3.75	3.75	3.375
2	2.38	5.625	4.375	4.375	4.375	4.375	4.125
2 1/2	2.88	6.50	5.125	5.125	5.125	5.125	4.875
3	3.50	6.625	5.875	5.875	5.875	5.875	5.375
4	4.50	8.125	7.625	7.00	7.125	7.125	6.875
5	5.56	9.75	9.50	8.375	8.50	8.50	7.75
6	6.62	11.375	10.50	9.75	9.875	9.875	8.75
8	8.62	14.125	12.625	12.00	12.125	12.125	11
10	10.75	17.125	15.75	14.125	14.25	14.25	13.375
12	12.75	19.625	18.00	16.50	16.625	16.625	16.125

CuNi 70/30 Flanges Fabrication Properties

Joining Technique	Suitability
Brazing	Excellent
Soldering	Excellent
Oxyacetylene Welding	Good
Coated Metal Arc Welding	Excellent
Gas Shielded Arc Welding	Excellent
Spot Welding	Excellent
Butt Welding	Excellent
Seam Welding	Excellent
Cold Worked Capacity	Good
Machinability Rating	20
Hot Formed Capacity	Good

UNS C71500 Socket Weld Flanges Tolerance

Code	Description	Tolerance
A	OD	>24": ±1/8" (3.2mm) / ≤24": ±1/16" (1.6mm)
B	Contact Face Diameter	1/4" RF: ±1/64" / 1/16" RF: ±1/32"
D	ID	20"+: -1/16" / 12"–18": +1/8" / ≤10": ±1/32"
J	Hub Base Diameter	>24": ±1/8" / ≤24": ±1/16"
P	Drilling	Bolt spacing ±1/32" / Bolt circle ±1/16"
H	Hub at Welding	≥6": +5/32", -1/32" / ≤5": +3/32", -1/32"
K	Hub Length	≥12": ±1/8" / ≤10": ±1/16"
C	Thickness	≥20": ±3/16", -0" / ≤18": ±1/8", -0"

Forms of Copper Nickel 70/30 Flanges in Stock

Socket Weld Flanges

Lap Joint Flanges

Threaded Flanges

Tongue & Groove Flanges

Spectacle Flanges

Orifice Flanges

Dimension Standards & Pressure Rating

Rating	Standard	Size Range
Class 150–900	MSS-SP-44	12"–60"
—	ASME B16.47 / API 605	26"–60"
Class 300–2500	ASME B16.36	1"–24"
2000–20000 PSI	API 6A	2 1/16"–30"
PN6–PN160	DIN	DN10–DN3600
Class 150–2500	ASME B16.5	1/2"–24"
Class 150–2500	ASME B16.48 / API 590	1/2"–24"
Class 150–600	BS 3293	26"–48"

🔹 Working Pressure Chart – UNS C71500 Flange (Sample Range)

Temp (°C)	2500	1500	900	600	400	300	150
-29~38	430.9	258.6	155.1	103.4	68.9	51.7	20
100	429.4	257.6	154.6	103	68.7	51.5	17.7
200	405.4	243.4	145.8	97.2	64.8	48.6	13.8
300	357.1	214.4	128.6	85.7	57	42.9	10.2
400	304.9	183.1	109.8	73.3	48.9	36.5	6.5
500	235	140.9	84.7	56.5	37.6	28.2	2.8
600	55.3	33.2	19.9	13.3	8.9	6.6	—
650	39.4	23.6	14.2	9.5	6.3	4.7	—

🔹 Equivalent Grades – 70/30 Copper Nickel Flanges

Grade	WNR	UNS	AFNOR	EN
Cupro Nickel 70/30	2.0882	C71500	Z2NCUD31-20AZ	NiCr20CuMo

🔹 Chemical Composition – CuNi 70/30 Flange

Element	Composition
Nickel (Ni)	29–33%
Copper (Cu)	65% min
Iron (Fe)	0.4–1%
Lead (Pb)	0.5% max
Manganese (Mn)	1% max
Zinc (Zn)	1% max

🔹 DIN 2.0882 CuNi Flanges – Mechanical Properties

Property	Min	Max
Yield Strength (MPa)	88	483
Tensile Strength (MPa)	372	517
Elongation (%)	45	—
Hardness (HRB)	—	51

🔹 Physical Properties – 70/30 Copper Nickel Flanges

Property	Unit	Value
Density	kg/dm³	8.95
Melting Range	°C	1170–1240
Specific Heat	J/kg·K	377
Thermal Conductivity	W/m·K	29
Coefficient of Linear Expansion (10–300°C)	10²/°K	16
Electrical Resistivity	microhm·cm	34
Modulus of Elasticity	GPa	152
Modulus of Rigidity	GPa	56

Types of Copper Nickel 70/30 Flanges

CuNi 70/30 Weld Neck Flange (WNRF)
Copper Nickel 70/30 Slip On Flange (SORF)
CuNi 70/30 Blind Flange (BLRF)
Copper Nickel 70/30 Socket Weld Flange (SWRF)

CuNi 70/30 Lap Joint Flange
Copper Nickel 70/30 Threaded Flange
CuNi 70/30 Orifice Flange
Copper Nickel 70/30 Ring Type Joint Flange (RTJ)

Dimensional Chart of Cu Ni 70/30 ANSI 150 Slip On Flange (inches)

NPS	O.D. of Flange (O)	Thickness (Q)	RF Dia (R)	Hub at Base (X)	Length Thru Hub	Bore (W)
1/2	3-1/2	7/16	1-3/8	1-3/16	1-7/8	.88
3/4	3-7/8	1/2	1-11/16	1-1/2	2-1/16	1.09
1	4-1/4	9/16	2	1-15/16	2-3/16	1.36
1-1/4	4-5/8	5/8	2-1/2	2-5/16	2-1/4	1.70
1-1/2	5	11/16	2-7/8	2-9/16	2-7/16	1.95
2	6	3/4	3-5/8	3-1/16	2-1/2	2.44
2-1/2	7	7/8	4-1/8	3-9/16	2-3/4	2.94
3	7-1/2	15/16	5	4-1/4	2-3/4	3.57
4	9	15/16	6-3/16	5-5/16	3	4.57

Chemical Composition of CuNi 70/30 (UNS C71500)

Element	Cu	Ni + Co	Fe	Mn	Zn max	Pb max
C71500	Balance	29.0–33.0%	0.40–1.0%	1.0% max	0.50%	0.05%

Mechanical Properties of CuNi 70/30 Flanges

Property	Value
Tensile Strength	415 MPa (60 ksi) min
Yield Strength (0.2%)	170 MPa (25 ksi) min
Elongation in 2"	30% min
Density	8.95 g/cm³
Melting Range	1170–1240°C (2140–2265°F)

Equivalent Grades of Copper Nickel 70/30 Flanges

Grade	UNS	CDA	DIN	BS	EN
Copper Nickel 70/30	C71500	CDA 715	2.0882	CN 107	CuNi30Mn1Fe

Price of Copper Nickel 70/30 Flanges

Product	Size	Grade / UNS	Price
Copper Nickel 70/30 Flanges	1/2" – 48"NB	As Per Requirement	Request a Quote
Copper Nickel 70/30 Flanges	Custom Size	As Per Requirement	Request a Quote

Copper Nickel 70/30 Fittings Application Industries

Industry	Application
Marine & Naval	Seawater cooling, shipbuilding, offshore platforms
Oil & Gas	Offshore subsea piping, wellhead equipment
Power Generation	Heat exchanger & condenser piping
Desalination	Brine and seawater handling systems
Chemical Processing	Corrosion-resistant piping systems

Why Choose Solitaire Overseas?

Trusted manufacturer, supplier, and exporter with global reach
Mill test certificates and third-party inspection available
Strict quality control as per ASTM, ASME, and ISO standards
Competitive pricing with prompt delivery worldwide
Wide stock availability for urgent and bulk requirements
Custom sizes, grades, and specifications on request
Experienced team ensuring dimensional accuracy and traceability

Frequently Asked Questions (FAQs)

What standard is used for Copper Nickel 70/30 Flanges?

The Copper Nickel 70/30 Flanges are produced according to ASTM B151 and ASME SB151 in UNS C71500.They are compliant with ANSI/ASME B16.5 and B16.47 in terms of dimensions and they come in Class 150 up to 2500.The equivalent to the DIN is Werkschiffahre 2.0882 and the British Standard grade is CN 107.

Why is CuNi 70/30 preferred over 90/10 in demanding marine applications?

The nickel content is 30-percent in CuNi 70/30, as opposed to 10 in 90/10, which provides it with superior resistance to corrosion at seawater speeds up to 4.5 m/s and in polluted seawater.It is also marginally stronger in yield strength and tensile strength hence it can be used in offshore and naval piping operations that require high strength.

What types of Copper Nickel 70/30 Flanges are available?

It is available in Weld Neck, Slip On, Blind, Socket Weld, Lap Joint, Threaded, Orifice, Ring Type Joint and Spectacle Blind types of flanges.Types of faces are as Raised Face, Flat Face and Ring Type Joint.The sizes start at 1/2 inch up to 48 inch and are constructed forged as per requirement.

What is the UNS designation for Copper Nickel 70/30 Flanges?

The UNS name of Copper Nickel 70/30 Flanges is C71500.It is also referred to as CDA 715, DIN 2.0882 and EN designation CuNi30Mn1Fe. The BS equivalent is CN 107. All these designations are the same alloy with about 70 percent of copper and 30 percent nickel.

Are Copper Nickel 70/30 Flanges suitable for desalination plants?

Yes. The Copper Nickel 70/30 Flanges are commonly used in the desalination facilities of handling the brine and the seawater.They are very reliable in long-term service in such systems because of excellent corrosion resistance in saline environment, high biofouling resistance and good mechanical strength in high temperatures.

Get a Quote for Copper Nickel 70/30 Flanges

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