ASTM B283 C70620 CuNi 90/10 Copper Alloy Steel Flange For Marine And Offshore Engineering
Price:
NON
MOQ:
1 PC
Delivery Time:
1 - 4 MONTH
Brand:
YUHONG
Product Description
ASTM B283 C70620 CuNi 90/10 Copper Alloy Steel Flange For Marine And Offshore Engineering
ASTM B283, corresponding to ASME SB283, is a standard specification for copper and copper alloy forgings, applicable to copper and copper alloy forgings produced by hot pressing, including flanges, fittings, and other pressure-bearing components. UNS C70620 is a 90/10 copper-nickel alloy (90% copper - 10% nickel), optimized for welding applications and marine conditions based on the standard 90-10 copper-nickel alloy UNS C70600, with impurity control improvements.
The standard explicitly states: "Copper Alloys UNS Nos. C70620 and C71520 are for product intended for welding applications"—this is a core distinction between C70620 and the general-purpose C70600 material.
ASTM B283 C70620 flanges are high-performance copper-nickel alloy forged flange solutions for marine engineering, seawater pipeline systems, desalination equipment, and chemical corrosion-resistant pipelines. They offer excellent corrosion resistance, good weldability, and stable mechanical properties in seawater environments.
| Chemical Composition (UNS C70620) | ||
| Element | Content Range (%) | Standard Reference |
| Cu (Copper) | ≥ 86.5 | ASTM B283 / UNS C70620 |
| Ni (Nickel) | 9.0 – 11.0 | ASTM B283 / UNS C70620 |
| Fe (Iron) | 1.0 – 1.8 | ASTM B283 / UNS C70620 |
| Mn (Manganese) | ≤ 1.0 | ASTM B283 / UNS C70620 |
| Zn (Zinc) | ≤ 0.50 | ASTM B283 (welding grade) |
| Pb (Lead) | ≤ 0.02 | ASTM B283 (welding grade) |
| C (Carbon) | ≤ 0.05 | ASTM B283 (welding grade) |
| P (Phosphorus) | ≤ 0.02 | ASTM B283 (welding grade) |
| S (Sulfur) | ≤ 0.02 | ASTM B283 (welding grade) |
| Mechanical Properties (ASME SB283 / ASTM B283 Standard Minimum) | |||||
| Condition | Size Range | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Standard Reference |
| Hot forged air cooled (M10) | All sizes | ≥ 276 (40 ksi) | ≥ 103 (15 ksi) | ≥ 30 | ASTM B283 |
| Hot forged air cooled (M10) | Specific cross-section | ≥ 310 (45 ksi) | ≥ 124 (18 ksi) | ≥ 30 | ASTM B283 |
| Physical Properties (Typical Values, 20°C Annealed) | ||
| Parameter | Value | Unit |
| Density | 8.89 | g/cm³ |
| Elastic Modulus | 130 | GPa |
| Thermal Conductivity (20°C) | 50.2 | W/(m·K) |
| Specific Heat Capacity | 0.38 | J/(g·K) |
| Coefficient of Linear Expansion (20-300°C) | 19 | ×10⁻⁶/K |
| Electrical Conductivity | 5 | MS/m (approx. 9% IACS) |
| Melting Range | 1100 – 1145 | °C |
| Core Differences Between C70620 and C70600 | ||
| Comparison Item | C70620 (Welding Grade) | C70600 (Standard Grade) |
| Weldability Design | Specifically designed for welding applications; standard explicitly states "intended for welding applications" | Can be used for welding, but impurity limits are less strict than C70620 |
| Impurity Control (Zn, Pb, C, P, S) | Zn ≤0.50%, Pb ≤0.02%, C ≤0.05%, P ≤0.02%, S ≤0.02% | Zn ≤1.0%, Pb ≤0.05%, relatively looser impurity control |
| Iron (Fe) Content | 1.0% – 1.8% | 1.0% – 1.8% (essentially the same) |
| Seawater Corrosion Resistance | Good (welding grade) | Good (general grade) |
| Cost | Between C70600 and high-purity nickel alloys | Lower |
Applications:
- Marine Engineering and Shipbuilding: Flange connections for seawater cooling systems, fire protection systems, ballast water pipelines, and seawater delivery pipelines.
- Seawater Desalination Plants: Seawater intake, pretreatment, and high-pressure pump inlet/outlet flanges.
- Coastal Power Plants: Condenser and cooler connection flanges for seawater circulating cooling system pipelines.
- Offshore Oil and Gas Platforms: Seawater injection systems, fire water pipelines, and public seawater systems.
- Chemical and Process Industries: Corrosion-resistant pipeline flanges for chloride-containing media.
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Company
YUHONG HOLDING GROUP CO., LTD
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Contact Person
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