Extreme strength wrought Cupro Nickel alloy CuNi14Al2 (compliant with generic alloy DIN 2.1504).
Highest strength and hardness within our marine suite of alloys, with tensile strengths over 1000MPa possible.
Background
This extremely high strength wrought cupro nickel is used in a variety of marine applications – including the oil, gas and defence sectors – for its outstanding corrosion resistance combined with extreme strength and hardness. The CAL T-1000 is also highly resistant to wear, has a low magnetic permeability, resists galling against stainless steel and does not suffer from marine growth (bio-fouling) or hydrogen embrittlement.
The main strengthening mechanism involves the precipitation of an extremely fine nickel-aluminium Ni3Al phase. Our deep metallurgical understanding of this mechanism and our advanced manufacturing techniques allows us to induce industry-leading properties which are unavailable elsewhere.
This material is available in two strength versions; T-1000S (table 2A standard material) and T-1000E (table 2B enhanced version). The enhanced versions, T-1000E, is only available in bars (square/flat/round/shapes) to around 100mm ø.
T-1000E is amongst the strongest copper-based alloys available anywhere.
A tenacious oxide film at the surface – which progressively thickens over time offering increased protection – makes this material highly resistant to attack in atmospheric and sea water environments, including polluted and brackish water.
The material is highly resistant to pitting and crevice corrosion which is common in multi-phase alloys and stainless steels. It has a natural bio-fouling resistance to attachment by micro/macrofoulers (e.g. seagrasses and molluscs) living in the seawater, which cause accelerated corrosion and reduced functionality.
View Corrosion Data
Table 3 – Surface Corrosion Data – Seawater
CAL Elite Marine Alloys
Other commonly used Marine-Alloys (also offered by CAL)
Material
Extreme Strength Cupro Nickel
High Strength Copper-Nickel-Manganese-Aluminium Alloy
Additional information can be provided upon request
Applications
Marine applications requiring extreme strength and high hardness coupled with excellent marine corrosion resistance combined with low magnetic permeability and anti-galling properties against stainless steel. Valve and pump bodies including internal components (stems/shafts/balls/seals). Actuators, pressure housings, clamps and fasteners, bushings, bearings and sonar equipment. The material’s ability to resist bio-fouling (lack of marine growth) is another important feature of this alloy.
Aerospace components, such as landing gear bushings, sleeves and highly stressed aero frame parts, refuelling connectors, noting its non-sparking properties.
Maximum service temperature ≈ 250°C / 482°F (long term) ≈ 280°C / 536°F (short term exposure); above these temperatures the material weakens and becomes less ductile.
We exercise precise control over alloy composition and, using our advanced melting and casting techniques, we produce high quality ingots and slabs for converting into an extensive variety of wrought products.
Our highly calibrated laboratory ensures we are always fully compliant with material composition requirements. Traceability from source to customer guaranteed.
Forms Available
We can provide the largest and heaviest-section forged products available anywhere due to industry-leading large ingot sizes that ensure a large total forging reduction and a uniform fine-grain wrought structure in the finished product.
Our capacity continues to evolve and widen as we service ever increasing customer demands.
The Elite Alloys come in three groups:
Bars (square/flat/round) from 10mm to 500mm (0.375″-20″) in section
Forgings (to 5 Tonnes): Blocks/Rings to 2400mm (8ft) outer ø / Shafts to 7M (23ft) long / Discs to 1250mm (50″) ø
Proof machined or fully machined components
Inspection and Certification
Full chemical analysis performed on every cast to ensure compliance with table 1.
Each batch (same size/same cast/same process-run) is mechanically tested to ensure compliance with minimum mechanical property requirements in table 2, which exceed the generic specification requirements.
100% ultrasonic inspection as standard – most test standards and acceptance criteria can be accommodated. Certification provided as standard in both wet-signed and electronic form (soft-copy) in accordance with EN 10204 type 3.1. 3.2 Certification can also be provided.
Characteristics
Extreme mechanical strength
High hardness
Outstanding resistance to sea-water corrosion – both general and pitting corrosion
Lack of selective phase attack
Immune to hydrogen embrittlement and stress corrosion cracking in sea-water
High resistance to impingement/erosion/cavitation/pitting in sea-water
Anti-galling against stainless steel
Low relative magnetic permeability
Low relative magnetic permeability – virtually non-magnetic
Anti bio-fouling (lack of marine growth)
No loss of properties at cryogenic temperatures
Good resistance to stress corrosion cracking in hydrogen sulphide conditions
Non-sparking
Cost-effective
Easily machined to a high surface finish and dimensionally stable
High modulus of elasticity compared with other copper-based alloys
Uniform fine grain structure permits volumetric inspection using ultrasonic techniques
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