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ASTM B171 Copper Alloy Plate and Sheet (C70600 / C71500)

The ASTM B171 Copper Alloy Plate and Sheet are manufactured from high-quality copper-nickel alloys such as C70600 (90-10 Cu-Ni) and C71500 (70-30 Cu-Ni). Designed according to the ASTM B171 standard, these copper alloy plates and sheets offer exceptional resistance to seawater corrosion, excellent strength, and high thermal conductivity. They are widely used in marine, heat exchanger, condenser, and desalination applications. Available in a full range of standard dimensions, tempers, and surface finishes, our ASTM B171 copper alloy sheets deliver outstanding performance and long service life in harsh environments.

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Products Description

ASTM B171 covers copper-nickel alloy plates, sheets, and strips designed for high-performance applications where corrosion resistance and durability are critical. The most common alloys are:

UNS C70600 (90-10 Cu-Ni): 90% Copper, 10% Nickel – excellent resistance to seawater corrosion and biofouling.

UNS C71500 (70-30 Cu-Ni): 70% Copper, 30% Nickel – higher strength and superior resistance to erosion and stress corrosion cracking.

These alloys are widely used for heat exchangers, condensers, marine hardware, desalination plants, and other industrial systems that operate in saltwater or brackish environments.

Our ASTM B171 copper alloy plates and sheets are produced under tight tolerances with smooth surfaces and uniform thickness, ensuring consistent quality and reliable weldability.

Keywords: ASTM B171 Copper Alloy Plate, ASTM B171 Copper Alloy Sheet, UNS C70600, C71500, C71500 Copper-Nickel Plate, Copper-Nickel Sheet, ASTM B171 Standard Dimensions

Product Specifications

✅ Standard: ASTM B171

✅ Material Grades: C70600 (90/10 Cu-Ni), C71500 (70/30 Cu-Ni)

✅ Type: Plate, Sheet, Strip

✅ Manufacturing Process: Hot Rolled / Cold Rolled / Annealed

✅ Corrosion Resistance: Excellent in seawater, brine, and steam

✅ Mechanical Properties: High strength with good ductility

✅ Thermal Conductivity: Efficient heat transfer performance

✅ Non-magnetic & Easily Weldable

Standard Dimensions – ASTM B171 Copper Alloy Plate and Sheet

Form	Thickness (in.)	Thickness (mm)	Width (in.)	Width (mm)	Length (in.)	Length (mm)	Approx. Weight (kg/m²)	Manufacturing Condition
Sheet	0.016 – 0.250	0.4 – 6.35	12 – 48	305 – 1219	48 – 120	1219 – 3048	3.6 – 57	Cold Rolled / Annealed (O60)
Medium Plate	0.250 – 0.375	6.35 – 9.52	12 – 60	305 – 1524	48 – 144	1219 – 3658	57 – 86	Hot Rolled / Annealed
Heavy Plate	0.375 – 1.000	9.52 – 25.4	24 – 80	610 – 2032	48 – 240	1219 – 6096	86 – 229	Hot Rolled / Annealed / Stress Relieved
Extra Heavy Plate	1.000 – 2.000	25.4 – 50.8	36 – 80	914 – 2032	48 – 240	1219 – 6096	229 – 458	Hot Rolled, Pickled or Polished
Strip (Coil Form)	0.010 – 0.125	0.25 – 3.18	Up to 16	≤ 406	Coil	Coil	-	Cold Rolled / Bright Annealed

Thickness Tolerances (per ASTM B171)

Nominal Thickness (mm)	Tolerance (± mm)	Typical Manufacturing Method
Up to 0.80	±0.04	Cold Rolled Sheet
0.80 – 2.50	±0.07	Cold Rolled Sheet
2.50 – 6.00	±0.10	Cold Rolled Sheet / Hot Rolled Plate
6.00 – 12.00	±0.15	Hot Rolled Plate
12.00 – 25.00	±0.25	Hot Rolled Plate
Over 25.00	±0.40	Hot Rolled Heavy Plate

Width Tolerances

Width Range (mm)	Tolerance (± mm)
≤ 300	±0.8
300 – 600	±1.0
600 – 1000	±1.5
1000 – 1500	±2.0
>1500	±3.0

Length Tolerances

Nominal Length (mm)	Tolerance (± mm)
≤ 1000	±3
1000 – 3000	±5
3000 – 6000	±8
>6000	±10

Flatness Tolerances (ASTM B171 Reference)

Thickness (mm)	Maximum Deviation (mm per 1000 mm)
0.4 – 1.0	1.0
1.0 – 3.0	1.5
3.0 – 6.0	2.0
6.0 – 12.0	3.0
>12.0	4.0

Available Tempers (Mechanical Conditions)

Temper Designation	Condition	Application
O60	Annealed	Maximum ductility and formability
H01	Hard	High strength and rigidity
H02	Half Hard	Balanced strength and ductility
H03	Three-Quarter Hard	Moderate strength, fair forming
H04	Full Hard	Maximum strength, limited forming
H55	Spring Temper	Resilient components, marine fasteners

Chemical Composition (Typical %)

Alloy	Cu	Ni + Co	Fe	Mn	Pb	Zn	Others (each)
C70600 (90-10)	88.6 – 90.6	9.0 – 11.0	1.0 – 1.8	1.0 max	0.05 max	1.0 max	0.02
C71500 (70-30)	69.0 – 71.0	29.0 – 31.0	0.4 – 1.0	1.0 max	0.05 max	1.0 max	0.02

Mechanical Properties

Property	C70600	C71500
Tensile Strength (MPa)	≥ 345	≥ 415
Yield Strength (MPa)	≥ 105	≥ 130
Elongation (%)	≥ 30	≥ 25
Hardness (HB)	80 – 100	100 – 120

Applications

Marine engineering and shipbuilding

Heat exchangers and condensers

Desalination plants and seawater systems

Offshore platforms and oil refineries

Chemical processing equipment

Power generation and cooling systems

Standards & Certifications

ASTM B171

ASME SB171

EN 1652 / EN 1653 equivalent

ISO 9001 certified manufacturing

Mill Test Certificate (EN 10204 3.1)

Packaging & Delivery

Wooden pallets or cases, with anti-corrosion wrapping

Size and grade marked on each plate/sheet

Custom export packing available

Delivery time: 10–30 days depending on quantity

Marked with: ASTM B171 – Alloy Grade – Size – Heat No. – Origin

FAQ (Frequently Asked Questions)

Q1: What is ASTM B171?
A1: ASTM B171 covers copper-nickel alloy plates, sheets, and strips designed for use in condensers, heat exchangers, and other applications requiring corrosion-resistant alloys.

Q2: What is the difference between C70600 and C71500?
A2: C70600 (90/10 Cu-Ni) has higher thermal conductivity and good corrosion resistance, while C71500 (70/30 Cu-Ni) offers greater strength and superior resistance to high-velocity seawater.

Q3: Can these plates be welded or fabricated easily?
A3: Yes, both alloys have excellent weldability and can be easily formed, machined, or brazed.

Q4: Do you provide Mill Test Certificates (MTC)?
A4: Yes, MTCs in accordance with EN 10204 3.1 are provided with every shipment.

Q5: Are custom thicknesses or surface finishes available?
A5: Yes, we can provide custom thickness, width, and surface finish to meet your specific project requirements.