UNS C46400 Naval Brass Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for UNS C46400 (Naval Brass) fasteners. Review the documentation verifying its exact Tin-alloyed chemistry engineered specifically to resist dezincification in harsh saltwater environments.
What's Inside This C46400 Naval Brass MTC
This sample mill test certificate details the specific parameters required for UNS C46400 fasteners. Known universally as "Naval Brass," this Alpha-Beta brass alloy is highly valued in the marine and offshore industries for its combination of high strength, excellent hot forgeability, and superior resistance to seawater corrosion.
- Full Traceability: Certified with TC No.: S265/26-XX and fully mapped to ASTM F468 and ASTM B21 specifications for nonferrous bolting materials.
- Marine-Grade Chemistry (Tin Addition): Explicitly verifies the critical 0.50 - 1.00% Tin (Sn) addition to the standard 60/40 Copper-Zinc matrix. This Tin addition is what specifically prevents the alloy from undergoing dezincification (leaching of zinc) in saltwater.
- Alpha-Beta Microstructure: The balanced chemistry ensures a dual-phase structure, giving the material excellent strength and making it highly suitable for hot-forging large fastener heads.
- Mechanical Strength: Demonstrates the alloy's strength in a drawn/forged temper, ensuring the final fastener possesses the required tensile and yield properties for robust marine assemblies.
- Quality Compliance: 100% visual inspection and precision thread gauging executed to ASME B18.2.1 standards. Material is completely non-magnetic.
Live Preview: UNS C46400 Naval Brass MTC Data
Review the specific chemical limits emphasizing the Tin content before downloading.
TC Number
S265/26-XX
TC Date
18.02.20XX
Material Spec
ASTM F468 / B21 UNS C46400
Bar Shape / Size
Round Bar / 20 mm
Dimensions / Item
Hex Head Bolt M20-2.5P x 80 mm
Quantity
800.00 NOS
Chemical Composition %
| Cu (Copper) | Sn (Tin) | Pb (Lead) | Fe (Iron) | Zn (Zinc) |
|---|---|---|---|---|
| 60.50 | 0.85 | 0.05 | 0.02 | Rem (38.58) |
| Min: 59.0 Max: 62.0 |
Min: 0.50 Max: 1.00 |
Max: 0.20 | Max: 0.10 | Remainder |
Mechanical Properties (Typical Hard Temper / Drawn)
| TENSILE STRENGTH (MPa) | YIELD STRENGTH 0.5% Ext (MPa) | % ELONGATION (GL-50mm) | HARDNESS (HRB) |
|---|---|---|---|
| 445.50 | 215.20 | 22.00 | 78, 80, 79 |
| Min: 380 (55 ksi) | Min: 170 (25 ksi) | Min: 15 | Typical: 70-85 |
Standard References & Compliance
Our MTC certificates for nonferrous fasteners align with the stringent requirements of the offshore, marine propulsion, and desalination industries. The test reports confirm exact compliance with ASTM F468 and ASTM B21 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 dezincification in saltwater. |
| 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 dimensional stability
Testing Conditions
- Mechanical tests carried out at room temp
- 100% visual and thread gauging carried out
Technical FAQs — UNS C46400 Naval Brass MTC
Why is Tin added to Naval Brass?
Standard yellow brasses (like C26000 or C36000) are susceptible to a corrosive attack in seawater known as "dezincification," where the saltwater chemically leaches the zinc out of the alloy, leaving behind a weak, porous copper shell. The addition of 0.50% to 1.00% Tin (Sn) in C46400 Naval Brass acts as a microscopic barrier, inhibiting this process and drastically extending the lifespan of fasteners submerged in marine environments.
How is C46400 different from standard brass in terms of manufacturing?
Naval Brass has an "Alpha-Beta" crystal structure. While highly ductile Cartridge Brass (Alpha structure) is great for cold-forming, the Alpha-Beta structure of Naval Brass makes it incredibly suitable for hot forging. This allows manufacturers to efficiently press massive, high-strength bolt heads for large ship assemblies and structural marine hardware.
Is Naval Brass magnetic?
No. UNS C46400 is entirely non-magnetic. In addition to its corrosion resistance, this property makes Naval Brass fasteners essential for naval warships, submarines, and marine navigation equipment where magnetic interference must be completely eliminated.