Name: Copper Nickel Plates (Cu-Ni 90/10, 70/30 & Marine Grades)
Brand: R V Metal Corporation
SKU: CU-NI-PLATES

Copper Nickel Plates (Cu-Ni 90/10, 70/30 & Marine Grades)

Product Overview

Copper Nickel Plates offered by R V Metal Corporation in Cu-Ni 90/10, Cu-Ni 70/30 and marine-grade alloys are engineered for extreme corrosion resistance, high mechanical strength, and long service life in aggressive environments. These plates are widely used in marine, offshore, shipbuilding, desalination, power generation, heat exchangers, and chemical processing applications where resistance to seawater, biofouling, erosion, and stress corrosion cracking is critical. Copper Nickel plates maintain excellent thermal conductivity, weldability, and formability while delivering superior performance under high pressure and elevated temperatures. Available in hot-rolled and cold-rolled conditions, multiple thickness ranges, and controlled tolerances, these plates conform to international standards such as ASTM, EN, and DIN, making them suitable for EPC projects, OEM fabrication, and critical industrial installations worldwide.

Technical Specifications

Parameter	Copper Nickel 90/10	Copper Nickel 70/30	Marine Grade Cu-Ni
UNS Designation	C70600	C71500	C70600 / C71500
Chemical Composition (Typical)	Cu 88.6–90%, Ni 9–11%	Cu 69–71%, Ni 29–31%	Cu-Ni with Fe & Mn additions
Product Form	Hot Rolled / Cold Rolled Plates
Thickness Range	3 mm to 50 mm (custom thickness available)
Width Range	1000 mm to 2500 mm
Length Range	2000 mm to 6000 mm (cut-to-size)
Density	8.94 g/cm³	8.95 g/cm³	~8.94 g/cm³
Tensile Strength	350–450 MPa	400–520 MPa	350–520 MPa
Yield Strength	120–170 MPa	150–220 MPa	120–220 MPa
Elongation	30–40%	25–35%	30–40%
Thermal Conductivity	50 W/m·K	40 W/m·K	40–50 W/m·K
Corrosion Resistance	Excellent in seawater	Outstanding in high-velocity seawater	Superior marine & offshore resistance
Fabrication	Excellent weldability, formability & machinability
Surface Finish	Mill Finish / Pickled / Polished (on request)
Standards	ASTM B171, ASTM B122, EN 1652, DIN 86019
Typical Applications	Shipbuilding, Heat Exchangers, Condensers, Desalination, Offshore Platforms

Chemical Composition

Element	Copper Nickel 90/10 (UNS C70600)	Copper Nickel 70/30 (UNS C71500)	Marine Grade Cu-Ni (Enhanced Fe/Mn)
Copper (Cu)	Balance (88.6 – 90.0)	Balance (69.0 – 71.0)	Balance
Nickel (Ni)	9.0 – 11.0	29.0 – 31.0	As specified (10% / 30%)
Iron (Fe)	1.0 – 1.8	0.4 – 1.0	1.0 – 2.0
Manganese (Mn)	0.2 – 1.0	0.5 – 1.0	0.5 – 1.5
Zinc (Zn)	0.5 max	0.5 max	0.5 max
Lead (Pb)	0.02 max	0.02 max	0.02 max
Carbon (C)	0.05 max	0.05 max	0.05 max
Sulphur (S)	0.02 max	0.02 max	0.02 max
Phosphorus (P)	0.02 max	0.02 max	0.02 max
Other Impurities	0.2 max (total)	0.2 max (total)	0.2 max (total)

UNS Codes & Grades

Alloy Description	UNS Code	Common Grade Name	EN / DIN Equivalent	ASTM Specification	Typical Applications
Copper Nickel 90/10 Plate	C70600	CuNi 90/10	EN CW352H	ASTM B171 / B122	Seawater piping, heat exchangers, condensers
Copper Nickel 70/30 Plate	C71500	CuNi 70/30	EN CW354H	ASTM B171 / B122	High-velocity seawater systems, naval vessels
Marine Grade Copper Nickel (Enhanced Fe/Mn)	C70620	CuNi 90/10 – Marine	EN CW353H	ASTM B171	Offshore platforms, desalination plants
Marine Grade Copper Nickel (High Strength)	C71520	CuNi 70/30 – Marine	EN CW355H	ASTM B171	Naval heat exchangers, seawater intake systems

Mechanical, Physical & Fabrication Properties

Property	Cu-Ni 90/10 (C70600)	Cu-Ni 70/30 (C71500)	Marine Grades (C70620 / C71520)	Remarks (Engineering Relevance)
Density	8.94 g/cm³	8.95 g/cm³	8.94 – 8.96 g/cm³	Used for accurate weight & load calculations
Tensile Strength	275 – 345 MPa	360 – 450 MPa	300 – 480 MPa	70/30 preferred where higher pressure & velocity exist
Yield Strength (0.2% Proof)	105 – 140 MPa	125 – 180 MPa	130 – 200 MPa	Critical for plate deformation resistance
Elongation	30 – 40%	25 – 35%	25 – 40%	High ductility aids forming & rolling
Hardness (HV)	80 – 110 HV	100 – 140 HV	90 – 150 HV	Depends on temper (Annealed / Cold Worked)
Modulus of Elasticity	140 GPa	150 GPa	140 – 150 GPa	Lower than steel → better vibration damping
Thermal Conductivity	50 W/m·K	40 W/m·K	38 – 50 W/m·K	Lower than copper, higher corrosion resistance
Electrical Conductivity	5 – 6 % IACS	2 – 3 % IACS	2 – 6 % IACS	Not used for electrical conduction
Corrosion Resistance	Excellent	Outstanding	Superior (Seawater Optimized)	Marine grades resist biofouling & erosion
Erosion-Corrosion Resistance	Good	Excellent	Excellent+	70/30 mandatory for high-flow seawater
Weldability	Excellent	Excellent	Excellent	Use matching Cu-Ni filler metals only
Formability	Very Good	Good	Good – Very Good	Annealed condition recommended for bending
Machinability	Fair	Fair	Fair	Lower than brass; sharp tooling required
Service Temperature Range	-200°C to +300°C	-200°C to +350°C	-200°C to +350°C	Suitable for cryogenic & marine heat systems

Common Names & International Identifiers

Alloy Type	Common / Trade Names	UNS Designation	EN / DIN Designation	ISO / Other International Identifiers	Industry Usage Reference
Copper Nickel 90/10	Cu-Ni 90/10, Cunifer 10, Copper-Nickel 10%	C70600	EN CW352H (CuNi10Fe1Mn)	ISO CuNi10Fe1Mn	Heat exchangers, condensers, low–medium velocity seawater systems
Copper Nickel 70/30	Cu-Ni 70/30, Cunifer 30, Copper-Nickel 30%	C71500	EN CW354H (CuNi30Mn1Fe)	ISO CuNi30Mn1Fe	High-velocity seawater piping, offshore & naval systems
Marine Grade 90/10	Marine CuNi 90/10, Enhanced Cu-Ni 90/10	C70620	EN CW352H (controlled Fe/Mn)	ISO CuNi10Fe1.5Mn	Naval vessels, desalination plants, marine EPC projects
Marine Grade 70/30	Marine CuNi 70/30, Enhanced Cu-Ni 70/30	C71520	EN CW354H (controlled Fe/Mn)	ISO CuNi30Fe2Mn	Critical seawater intake lines, offshore platforms
Military / Naval Variant	Naval Copper Nickel Plate	C70630 / C71530	EN Naval Specification Grades	NATO / Defence-specific specs	Submarines, warships, defence heat systems

Standards & International Equivalents

Alloy Type	ASTM / ASME	UNS	EN / DIN	ISO	BS	JIS	Typical Acceptance in EPC / Marine Projects
Cu-Ni 90/10 Plates	ASTM B171 / ASME SB-171	C70600	EN CW352H (CuNi10Fe1Mn)	ISO 1634 / ISO CuNi10Fe1Mn	BS 2871 CN102	JIS H3100 C7060	Condensers, heat exchangers, seawater systems
Cu-Ni 90/10 Marine Grade	ASTM B171 (Enhanced Fe/Mn)	C70620	EN CW352H (Marine controlled chemistry)	ISO CuNi10Fe1.5Mn	BS Defence / Naval specs	JIS Marine Spec	Naval vessels, desalination plants, offshore EPC
Cu-Ni 70/30 Plates	ASTM B171 / ASME SB-171	C71500	EN CW354H (CuNi30Mn1Fe)	ISO 1634 / ISO CuNi30Mn1Fe	BS 2871 CN107	JIS H3100 C7150	High-velocity seawater, offshore platforms
Cu-Ni 70/30 Marine Grade	ASTM B171 (Enhanced Fe/Mn)	C71520	EN CW354H (Marine controlled chemistry)	ISO CuNi30Fe2Mn	BS Defence / Naval specs	JIS Marine Spec	Critical marine piping, naval heat exchangers
Naval / Defence Grade	ASTM B171 (Special military clauses)	C70630 / C71530	EN Naval-specific grades	NATO / Defence standards	BS MOD / Naval	JIS Defence	Submarines, warships, defence heat systems

Applications

Application Area	Cu-Ni Grade Used	Why This Grade Is Selected	Typical Standards Referenced	Critical Engineering Notes
Seawater Heat Exchangers	Cu-Ni 90/10, Cu-Ni 70/30	Excellent resistance to seawater corrosion and biofouling	ASTM B171, ASME SB-171	70/30 preferred for higher flow velocities & erosion resistance
Desalination Plants	Cu-Ni 90/10 (Marine Grade)	Stable performance in warm, high-salinity seawater	ASTM B171, EN CW352H	Iron content must be controlled for long-term service life
Offshore Oil & Gas Platforms	Cu-Ni 70/30 (Marine Grade)	Superior resistance to erosion-corrosion under turbulent flow	ASTM B171, NACE MR0175 (where applicable)	Used in splash zones and high-velocity seawater circuits
Shipbuilding & Naval Vessels	Cu-Ni 90/10, Cu-Ni 70/30	Proven long-term durability in marine environments	ASTM B171, Naval / Defence Specs	Often specified with tightened Fe & Mn chemistry limits
Condensers & Evaporators	Cu-Ni 90/10	Good thermal conductivity with corrosion resistance	ASTM B171, ASME SB-171	Preferred where moderate seawater velocity is maintained
Power Plants (Thermal & Nuclear)	Cu-Ni 90/10, Marine Grades	Resistance to stress corrosion and fouling	ASTM B171, Project-Specific EPC Specs	Material traceability & MTCs are mandatory
Marine Structural Components	Cu-Ni 70/30	Higher strength and erosion resistance	ASTM B171, EN CW354H	Used for cladding, wear plates, and exposed panels
Seawater Piping Supports & Linings	Cu-Ni 90/10	Corrosion resistance without need for coatings	ASTM B171	Avoid galvanic coupling with carbon steel without insulation
Desalination Heat Recovery Systems	Cu-Ni 70/30	Handles high temperature and aggressive seawater	ASTM B171, ISO Cu-Ni standards	Thickness selection critical for pressure + erosion margin
Defence & Submarine Applications	Cu-Ni Marine / Defence Grades	Low magnetic permeability & corrosion resistance	Naval / NATO / Defence Specifications	Often subject to confidential chemistry & QA clauses

Standard Copper Nickel Plates (Cu-Ni 90/10, 70/30 & Marine Grades) Dimensional Chart

Standard Copper Nickel Plates (Cu-Ni 90/10, 70/30 & Marine Grades) – Dimensional & Theoretical Weight Chart
Product Form	Thickness (mm)	Width (mm)	Length (mm)	Standard Sheet/Plate Size (mm)	Theoretical Weight (kg/m²)	Theoretical Weight per Plate (kg)	Notes (EPC / Fabrication)
Plate / Sheet	2	1000	2000	1000 × 2000	18.0	36.0	Good for cladding, ducting, light fabrication
Plate / Sheet	3	1000	2000	1000 × 2000	27.0	54.0	Common for skid panels & marine covers
Plate / Sheet	5	1000	2000	1000 × 2000	45.0	90.0	Weldable; supports, brackets, base plates
Plate	6	1000	2000	1000 × 2000	54.0	108.0	Typical EPC minimum for exposed marine platework
Plate	8	1000	2000	1000 × 2000	72.0	144.0	Higher rigidity; mounting plates & splash zone parts
Plate	10	1000	2000	1000 × 2000	90.0	180.0	For heavy-duty panels and load-bearing brackets
Plate / Sheet	2	1220	2440	1220 × 2440	18.0	53.6	Standard “4×8” equivalent; easy nesting for EPC
Plate / Sheet	3	1220	2440	1220 × 2440	27.0	80.4	Common for desalination & marine fabrication
Plate	5	1220	2440	1220 × 2440	45.0	134.0	Preferred thickness for welded sub-assemblies
Plate	6	1220	2440	1220 × 2440	54.0	160.9	Common EPC plate size for offshore skids
Plate	8	1220	2440	1220 × 2440	72.0	214.6	Higher stiffness; splash-zone & erosion-prone areas
Plate	10	1220	2440	1220 × 2440	90.0	268.2	Heavy-duty base plates and mounting pads
Plate	3	1500	3000	1500 × 3000	27.0	121.5	Common marine fabrication size; better seam reduction
Plate	5	1500	3000	1500 × 3000	45.0	202.5	Used in condensers, seawater circuit fabrication
Plate	6	1500	3000	1500 × 3000	54.0	243.0	Good balance of rigidity & weldability
Plate	8	1500	3000	1500 × 3000	72.0	324.0	For high-stress marine & offshore components
Plate	10	1500	3000	1500 × 3000	90.0	405.0	For heavy-duty structural / base plate use
Plate (Heavy)	12	—	—	Cut-to-Size	108.0	—	Common for erosion zones; specify flatness and UT if required
Plate (Heavy)	16	—	—	Cut-to-Size	144.0	—	Used for high-load pads and wear plates
Plate (Heavy)	20	—	—	Cut-to-Size	180.0	—	Used for critical marine / offshore fabrication
Plate (Heavy)	25	—	—	Cut-to-Size	225.0	—	Specify machining allowance and flatness tolerance
Plate (Heavy)	30	—	—	Cut-to-Size	270.0	—	Heavy plate; handle with proper lifting & edge prep
Notes (Theoretical Weight Calculation): Weight (kg/m²) = Thickness (mm) × Density (kg/m³) ÷ 1000. For estimating, density is typically taken as ~9000 kg/m³ for Cu-Ni alloys. Theoretical values are for estimation and logistics planning; final weight depends on tolerance, finish, and mill practice. For EPC packages, specify: grade (90/10 or 70/30), temper/condition, thickness tolerance, flatness, and test certificates (MTC/EN 10204).

Copper Nickel Plates