UNS C65500 Silicon Bronze Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for UNS C65500 (High Silicon Bronze A) fasteners. Review the documentation verifying its welding-grade chemistry, exceptional strength-to-corrosion resistance ratio, and mechanical properties.
What's Inside This C65500 MTC Certificate
This sample mill test certificate details the critical chemical and mechanical parameters for UNS C65500 fasteners. Silicon Bronze is a high-performance copper alloy that is essentially the industry standard for marine environments where both structural strength and long-term corrosion resistance are required.
- Full Traceability: Certified with TC No.: S312/26-XX and fully mapped to ASTM F468 and ASTM B98 specifications for high-strength nonferrous bolting materials.
- High Silicon Chemistry: Explicitly verifies the critical 2.80 - 3.80% Silicon (Si) addition. This element is the key to the alloy's strength and fluidity, making it ideal for both structural components and high-quality welding filler wire.
- Marine-Grade Corrosion Resistance: The unique Copper-Silicon matrix provides near-total immunity to seawater corrosion, stress-corrosion cracking, and dezincification.
- Cold-Drawn Temper Strength: Confirms the material was supplied in a cold-worked state (e.g., Hard / H04 temper), ensuring the fastener achieves structural tensile and yield strengths that far exceed standard brass alloys.
- Quality Compliance: 100% visual inspection and precision dimensional checks executed to ASME B18.2.1 standards. Material is characterized by being completely non-magnetic and highly weldable.
Live Preview: UNS C65500 Silicon Bronze MTC Data
Review the specialized high-strength nonferrous parameters before downloading.
TC Number
S312/26-XX
TC Date
02.04.20XX
Material Spec
ASTM F468 / B98 UNS C65500
Bar Shape / Size
Round Bar / 16 mm
Dimensions / Item
Hex Head Bolt M16-2.0P x 70 mm
Quantity
450.00 NOS
Chemical Composition %
| Cu (Copper) | Si (Silicon) | Mn (Manganese) | Fe (Iron) |
|---|---|---|---|
| Rem (96.55) | 3.10 | 0.30 | 0.05 |
| Min: 94.0 | Min: 2.8 Max: 3.8 |
Max: 1.50 | Max: 0.10 |
Mechanical Properties (Hard Temper / H04)
| TENSILE STRENGTH (MPa) | YIELD STRENGTH 0.5% Ext (MPa) | % ELONGATION (GL-50mm) | HARDNESS (HRB) |
|---|---|---|---|
| 650.40 | 485.20 | 15.00 | 85, 87, 86 |
| Min: 550 (80 ksi) | Min: 345 (50 ksi) | Min: 12 | Typical: 80-95 |
Standard References & Compliance
Our MTC certificates for high-performance nonferrous fasteners align with the stringent requirements of the marine construction, chemical processing, and civil engineering industries. The test reports confirm exact compliance with ASTM F468 and ASTM B98 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. |
| Magnetic Permeability | Material is confirmed completely Non-Magnetic. |
| Marine Suitability | Alloy chemistry verified to resist saltwater corrosion/stress cracking. |
| 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
- Cold Drawn / Hard Temper (H04)
- Stress relieved for structural integrity
Testing Conditions
- Mechanical tests carried out at room temp
- 100% visual inspection carried out
Technical FAQs — UNS C65500 Silicon Bronze MTC
What makes C65500 Silicon Bronze so durable?
The secret lies in the interaction between the Copper and Silicon. While other bronzes rely on Tin (like Phosphor Bronze) for strength, the Silicon addition in C65500 creates a solid-solution strengthening effect. This provides excellent tensile strength and, more importantly, creates a tough, protective copper-silicate surface layer that is virtually impervious to seawater corrosion and stress-corrosion cracking.
Is it true that Silicon Bronze is used for welding other metals?
Yes. C65500 is so highly regarded for its weldability and corrosion resistance that it is commonly used as a filler metal (TIG welding rod) for welding copper, brass, and even joining dissimilar metals like galvanized steel. Its low melting point and excellent flow characteristics make it perfect for creating strong, corrosion-resistant bonds.
Is C65500 magnetic?
No. UNS C65500 is completely non-magnetic. Because of this, it is frequently used in applications where electronic integrity is paramount, such as fastening components inside high-tech marine navigation equipment or sensitive medical instrumentation, where any magnetic field (even from a fastener) could cause interference.