UNS C71500 Cupro-Nickel 70/30 Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for UNS C71500 (70/30 Copper-Nickel) fasteners. Review the documentation verifying high-strength chemistry, superior marine erosion resistance, and mechanical properties engineered for the most demanding offshore, subsea, and desalination applications.
What's Inside This C71500 MTC Certificate
This sample mill test certificate highlights the critical testing parameters for UNS C71500 (Copper-Nickel 70/30) fasteners. This alloy is the premier choice for extreme marine environments, offering superior strength and enhanced resistance to seawater corrosion and impingement compared to the 90/10 (C70600) variant.
- Full Traceability: Certified with TC No.: S378/26-XX and mapped to ASTM F468 and ASTM B151 specifications for high-strength nonferrous bolting.
- 70/30 Copper-Nickel Chemistry: Explicitly verifies the precise alloying: ~70% Copper and ~30% Nickel (Ni), complemented by mandatory Iron (Fe) and Manganese (Mn) additions which are crucial for establishing the highly stable protective film against saltwater degradation.
- Enhanced Erosion Resistance: With its higher Nickel content, C71500 is specifically chosen for offshore oil/gas and subsea systems where seawater flows at high velocities, causing severe erosion on standard alloys.
- High Structural Strength: Supplied in cold-worked tempers to maximize tensile and yield properties, ensuring the bolting can sustain the high-load demands of marine structural assemblies.
- Quality Compliance: 100% visual inspection and precision dimensional checks executed to ASME B18.2.1 standards. Material is characterized by being completely non-magnetic.
Live Preview: UNS C71500 Cupro-Nickel MTC Data
Review the specialized high-strength marine-grade chemical and physical parameters before downloading.
TC Number
S378/26-XX
TC Date
15.06.20XX
Material Spec
ASTM F468 / B151 UNS C71500
Bar Shape / Size
Round Bar / 24 mm
Dimensions / Item
Heavy Hex Bolt M24-3.0P x 100 mm
Quantity
350.00 NOS
Chemical Composition %
| Cu (Copper) | Ni (Nickel) | Fe (Iron) | Mn (Manganese) |
|---|---|---|---|
| Rem (68.40) | 30.50 | 0.75 | 0.35 |
| Remainder | Min: 29.0 Max: 33.0 |
Min: 0.4 Max: 1.0 |
Min: 0.3 Max: 1.0 |
Mechanical Properties
| TENSILE STRENGTH (MPa) | YIELD STRENGTH 0.5% Ext (MPa) | % ELONGATION (GL-50mm) | HARDNESS (HRB) |
|---|---|---|---|
| 510.50 | 380.20 | 20.00 | 82, 85, 83 |
| Min: 450 (65 ksi) | Min: 275 (40 ksi) | Min: 12 | Typical: 75-90 |
Standard References & Compliance
Our MTC certificates for marine-grade nonferrous fasteners align with the stringent requirements of the offshore, subsea, and desalination industries. The test reports confirm exact compliance with ASTM F468 and ASTM B151 with respect to the specific heat and lot tested.
| Standard / Requirement | Confirmation on Certificate |
|---|---|
| Visual Inspection | 100% visual inspection carried out & found free from defects. |
| Corrosion Resistance | Alloy chemistry verified to resist severe seawater erosion/corrosion. |
| Magnetic Permeability | Material is confirmed Non-Magnetic for marine electronic use. |
| Dimensional Accuracy | All Dimensions are as per PO Specification / ASME B18.2.1. |
Certification Details
We confirm that the above mentioned items were Manufactured, Sampled, Tested, and Inspected in accordance with the subjected Customer's Purchase Order and applicable Drawings, Material Specifications, Codes & Standards.
Documentation Standard
- EN 10204-2004: 3.1 Standard
- Free from radioactive contamination
- Certified ISO 9001: 2015 Company
Processing State
- Hot Forged / Cold Drawn
- Stress relieved for high-pressure marine service
Testing Conditions
- Mechanical tests carried out at room temp
- 100% visual inspection carried out
Technical FAQs — UNS C71500 Cupro-Nickel MTC
Why choose C71500 (70/30) over C70600 (90/10)?
While both are excellent marine alloys, C71500 contains a higher percentage of Nickel (30% vs 10%). This increase in Nickel translates directly into higher mechanical strength and better resistance to impingement corrosion, where high-velocity seawater currents physically erode the fastener's surface. C71500 is the choice for more extreme, high-flow, or turbulent marine environments.
How does Iron (Fe) addition function in C71500?
The addition of Iron is what allows the Cupro-Nickel alloy to form a highly adherent and self-healing protective layer on its surface. Without this Iron, the protective film would be easily washed away by turbulent seawater. C71500 is specifically balanced to optimize this film in harsh, high-velocity marine conditions.
Is C71500 magnetic?
No. UNS C71500 is completely non-magnetic. Like other high-performance Cupro-Nickel alloys, it is chosen for naval applications—such as submarine hulls or shipboard sensors—where the elimination of magnetic interference is as important as the need to resist decades of saltwater exposure.