Copper Alloys
Copper Alloys: Specifications | Grades & Standards | Product Types | Equivalent Grades | Chemical Composition | Mechanical Properties | BW Fittings | Forged Fittings | Flanges | FAQ
Global Manufacturer of Copper Nickel Pipe Fittings and Flanges, offering seamless and forged Elbows, Tees, Reducers, End Caps, and Industrial Flanges. Precision-engineered in compliance with ASTM B111, B151, and B466 standards for USA, European, and Asian markets.
Best Export Prices: sales@midlandforgefittings.com
Midland Forge and Fittings Pvt. Ltd. is a leading manufacturer and global supplier of premium Copper Alloy pipe fittings and flanges, including seamless, forged, threaded, and socket-weld components. Specializing in Copper Nickel, Bronze, and Brass alloys, the company serves critical applications. With strict adherence to ASTM B111, B151, B466, and ASME standards, we ensure high corrosion resistance, durability, and precision across all piping solutions.
We combine advanced engineering with in-house fabrication to deliver customized Copper Alloy elbows, tees, reducers, stub ends, end caps, and industrial flanges tailored to complex project requirements. By integrating global material sourcing, ISO-certified production practices, and client-focused service, we are a trusted partner for industries worldwide for reliable, durable, and high-quality Copper Alloy piping components.
Copper Alloys are metals composed primarily of copper combined with other elements such as nickel, zinc, tin, or aluminum to enhance mechanical strength, corrosion resistance, and thermal conductivity. Common Copper Alloys used in piping systems include Copper Nickel (Cu-Ni), Bronze, and Brass. Copper Nickel alloys, such as 90/10 and 70/30 compositions, provide excellent resistance to seawater corrosion, biofouling, and oxidizing/reducing environments, making them ideal for marine and offshore applications. Bronze and Brass alloys offer high wear resistance, machinability, and durability in industrial and chemical processing environments.
Copper Alloy pipe fittings and flanges are manufactured in seamless, forged, threaded, and socket weld types to ensure precise dimensional accuracy, pressure integrity, and long-term performance. Components such as elbows, tees, reducers, stub ends, end caps, and flanges are produced in accordance with ASTM B111, B151, B466, and ASME standards. These fittings and flanges are extensively used in chemical plants, desalination units, marine pipelines, and process industries where high corrosion resistance, thermal conductivity, and mechanical reliability are critical for safe and efficient fluid transport.
Copper Nickel Pipe Fittings - Specifications
Copper Alloy Buttweld Fittings– Grades & Standards
| Material / Alloy | Grade / UNS | ASTM / ASME Standard | Product Type | Typical Applications |
|---|---|---|---|---|
| Copper Nickel 90/10, (CuNi 90/10) |
C70600 | ASTM B111 / ASME SB111 (Buttweld), ASTM B466 / B151 / ASME SB466 (Forged & Flanges) |
Buttweld, Forged, Flanges | Marine piping, seawater systems, offshore pipelines, desalination plants |
| Copper Nickel 70/30 (CuNi 70/30) |
C71500 | ASTM B111 / ASME SB111 (Buttweld), ASTM B466 / B151 / ASME SB466 (Forged & Flanges) |
Buttweld, Forged, Flanges | High-strength seawater pipelines, offshore platforms, chemical systems |
| Bronze (Cu-Sn alloys) |
C90500 | ASTM B62 / B61 (Buttweld), ASTM B150 / B151 (Forged & Flanges) |
Buttweld, Forged, Flanges | Industrial piping, chemical plants, water distribution, heat exchangers |
| Brass (Cu-Zn alloys) |
C37700 / C38000 | ASTM B124 / B139 (Buttweld), ASTM B16 / B151 (Forged & Flanges) |
Buttweld, Forged, Flanges | Potable water, HVAC systems, chemical piping, moderate corrosion resistance |
| Copper-Aluminum (Cu-Al alloys) |
C95800 | ASTM B584 (Buttweld & Forged), ASTM B151 (Flanges) |
Buttweld, Forged, Flanges | Offshore pipelines, high-strength marine and industrial applications, wear-resistant piping |
Copper Alloys Products
ASTM B466 Forged Cu-Ni Fittings - Equivalent Grades – ASTM, ASME, DIN, JIS & UNS
| Material / Alloy | ASTM / ASME | UNS | EN / DIN | JIS | BS / UK |
|---|---|---|---|---|---|
| Copper Nickel 90/10 (CuNi 90/10) |
ASTM B111 (Buttweld), ASTM B466 / B151 (Forged & Flanges) |
C70600 | DIN 2.0876 | CuNi10Fe1Mn | BS 2870 |
| Copper Nickel 70/30 (CuNi 70/30) |
ASTM B111 (Buttweld), ASTM B466 / B151 (Forged & Flanges) |
C71500 | DIN 2.0880 | CuNi30Fe1Mn | BS 2871 |
| Bronze (Cu-Sn alloys) |
ASTM B62 / B61 (Buttweld), ASTM B150 / B151 (Forged & Flanges) |
C90300 / C90500 |
DIN 2.0872 | – | BS 1400 |
| Brass (Cu-Zn alloys) |
ASTM B124 / B139 (Buttweld), ASTM B16 / B151 (Forged & Flanges) |
C37700 / C38000 |
DIN 2.0401 / 2.0402 |
– | BS 2874 |
| Copper-Aluminum (Cu-Al alloys) |
ASTM B584 (Buttweld & Forged), ASTM B151 (Flanges) |
C95800 | DIN 2.0933 | – | BS 2872 |
ASME SB151 Copper Nickel Flanges - Chemical Composition
| Alloy / Material | Cu (%) | Ni (%) | Sn (%) | Zn (%) | Al (%) | Fe (%) | Mn (%) | Pb (%) | Other Elements (%) |
|---|---|---|---|---|---|---|---|---|---|
| Copper Nickel 90/10 (C70600) | 89–91 | 9–10 | – | – | – | 0.3 max | 0.5 max | – | – |
| Copper Nickel 70/30 (C71500) | 69–71 | 29–30 | – | – | – | 0.3 max | 0.5 max | – | – |
| Bronze (C90500) | 88–90 | – | 9–10 | – | – | – | – | 0.5 max | – |
| Brass (C37700 / C38000) | 60–63 | – | – | 37–40 | – | – | – | 0.5 max | – |
| Copper-Aluminum (C95800) | 81–83 | 4–5 | – | – | 9–11 | 1 max | – | – | – |
ASTM B584 Cu-Al Alloy Fittings - Mechanical Properties
| Alloy / Material |
Tensile Strength (MPa / psi) |
Yield Strength (MPa / psi) |
Elongation (%) |
Hardness (HB / Brinell) |
Impact Strength |
|---|---|---|---|---|---|
| Copper Nickel 90/10 (C70600) |
310–450 MPa (45–65 ksi) | 140–250 MPa (20–36 ksi) | 30–40 | 90–120 HB | Good, tough in seawater |
| Copper Nickel 70/30 (C71500) |
400–550 MPa (58–80 ksi) | 200–280 MPa (29–41 ksi) | 25–35 | 100–130 HB | High toughness |
| Bronze (C90500) |
320–480 MPa (46–70 ksi) | 140–250 MPa (20–36 ksi) | 15–30 | 80–120 HB | Moderate toughness |
| Brass (C37700 / C38000) |
280–450 MPa (40–65 ksi) | 110–220 MPa (16–32 ksi) | 30–45 | 70–110 HB | Moderate toughness |
| Copper-Aluminum (C95800) |
450–600 MPa (65–87 ksi) | 250–350 MPa (36–51 ksi) | 10–20 | 110–150 HB | High toughness |
Industrial Copper Alloy Buttweld Fittings
High-Quality Copper Alloy Flanges
CU-NI Alloy Forged Fittings
What are the advantages of using Copper Alloy fittings over other materials?
Corrosion Resistance: Superior resistance to seawater, acidic, and alkaline environments.
Durability: Long service life in high-pressure and high-temperature conditions.
Thermal & Electrical Conductivity: Efficient heat transfer in heat exchangers and industrial systems.
Ease of Fabrication: Seamless, forged, and threaded options allow flexible installation.
Compliance with Standards: Ensures predictable performance under industrial, marine, and chemical conditions.
What inspection and testing are performed on Copper Alloy fittings?
Visual and dimensional inspection to verify ASTM/ASME compliance.
Hydrostatic testing to confirm pressure integrity.
Non-destructive testing (NDT): Radiography or ultrasonic inspection for seamless and forged fittings.
Chemical composition verification via PMI or spectrochemical analysis to ensure alloy conformity.
These tests ensure reliable performance in high-pressure, high-temperature, and corrosive environments.
Can Copper Alloy fittings be customized?
Yes, Midland Forge and Fittings Pvt. Ltd. offers custom elbows, tees, reducers, stub ends, end caps, and flanges as per project specifications.
Customization includes dimensions, wall thickness, pressure rating, and alloy composition.
Components can be manufactured in seamless or forged form to meet specific ASTM, ASME, or project standards.