UNS C70600 Cupro-Nickel 90/10 Fasteners – MTC
UNS C70600 Cupro-Nickel 90/10 Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for UNS C70600 (90/10 Copper-Nickel) fasteners. Review the documentation verifying marine-grade chemistry, erosion-corrosion resistance, and the mechanical properties essential for demanding offshore and subsea applications.
What's Inside This C70600 MTC Certificate
This sample mill test certificate details the critical chemical and mechanical parameters for UNS C70600 (Copper-Nickel 90/10) fasteners. This alloy is the global standard for marine applications requiring exceptional resistance to seawater corrosion, including high-velocity erosion and biofouling, while maintaining excellent strength and ductility.
- Full Traceability: Certified with TC No.: S352/26-XX and mapped to ASTM F468 and ASTM B151 specifications for high-strength nonferrous bolting materials.
- 90/10 Copper-Nickel Chemistry: Explicitly verifies the precise alloying: ~90% Copper and ~10% Nickel (Ni), along with critical Iron (Fe) and Manganese (Mn) additions which are vital for establishing the stable protective film that resists saltwater degradation.
- Marine Corrosion Resistance: C70600 is specifically chosen for offshore oil and gas, desalination plants, and ship building because it remains immune to stress-corrosion cracking and pitting, unlike many other non-ferrous alloys.
- Cold-Drawn Temper Strength: Confirms the material was supplied in a hard-drawn temper, ensuring the final machined fastener possesses the structural tensile and yield strengths required for load-bearing marine 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 C70600 Cupro-Nickel MTC Data
Review the specialized marine-grade chemical and physical parameters before downloading.
TC Number
S352/26-XX
TC Date
04.07.20XX
Material Spec
ASTM F468 / B151 UNS C70600
Bar Shape / Size
Round Bar / 20 mm
Dimensions / Item
Hex Head Bolt M20-2.5P x 80 mm
Quantity
400.00 NOS
Chemical Composition %
| Cu (Copper) | Ni (Nickel) | Fe (Iron) | Mn (Manganese) |
|---|---|---|---|
| Rem (88.45) | 10.20 | 1.15 | 0.20 |
| Remainder | Min: 9.0 Max: 11.0 |
Min: 1.0 Max: 1.8 |
Max: 1.0 |
Mechanical Properties
| TENSILE STRENGTH (MPa) | YIELD STRENGTH 0.5% Ext (MPa) | % ELONGATION (GL-50mm) | HARDNESS (HRB) |
|---|---|---|---|
| 450.50 | 320.20 | 25.00 | 72, 75, 73 |
| Min: 380 (55 ksi) | Min: 200 (29 ksi) | Min: 15 | Typical: 65-80 |
Standard References & Compliance
Our MTC certificates for marine-grade nonferrous fasteners align with the stringent requirements of the offshore platform, naval vessel, and subsea industry sectors. 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 saltwater erosion/corrosion. |
| Magnetic Permeability | Material is confirmed Non-Magnetic for marine 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 marine service
Testing Conditions
- Mechanical tests carried out at room temp
- 100% visual inspection carried out
Technical FAQs — UNS C70600 Cupro-Nickel MTC
Why is 10% Nickel added to this copper alloy?
The 10% Nickel addition (the "90/10" in Cu-Ni 90/10) is what gives C70600 its superlative resistance to marine environments. Nickel makes the alloy significantly stronger than pure copper and reinforces the protective oxide layer on the bolt's surface, preventing saltwater from attacking the underlying metal. This ensures that fasteners remain intact for decades in environments where other metals would corrode rapidly.
Why is Iron (Fe) addition so important?
Iron is critical in C70600 because it significantly improves the alloy's resistance to "impingement corrosion." In marine applications, saltwater is often moving at high speeds; Iron additions create a much tougher, more adherent surface film that prevents that rushing water from physically eroding the fastener's protective layer.
Can C70600 be used in structural load-bearing applications?
Yes. Cupro-Nickel 90/10 has good strength and high ductility. While it is not as strong as high-strength alloy steels (like B7 or L7), it provides more than enough structural integrity for many marine assemblies, piping support, and seawater instrumentation fasteners, all while offering corrosion resistance that steel can never match.