UNS C26000 Cartridge Brass Fasteners – MTC
UNS C26000 Cartridge Brass Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for UNS C26000 (70/30 Cartridge Brass). Review the documentation verifying its exact 70/30 Copper-Zinc chemistry, lead-free compliance, and superior cold-headed mechanical strength.
What's Inside This C26000 Cartridge Brass MTC
This sample mill test certificate details the specific parameters required for UNS C26000 fasteners. Known universally as "70/30 Brass" or "Cartridge Brass", this alloy possesses the highest ductility of the yellow brasses, making it the premier choice for cold-headed machine screws, rivets, and highly formed fasteners.
- Full Traceability: Certified with TC No.: S240/26-XX and mapped to ASTM F468 / B134 specifications for nonferrous bolting materials.
- 70/30 Chemistry: Explicitly verifies the ideal ratio of ~70% Copper and ~30% Zinc. This specific metallurgical balance provides maximum cold workability without sacrificing corrosion resistance.
- Low-Lead Verification: Confirms a Lead (Pb) content well below the 0.07% maximum, guaranteeing compliance with modern lead-free environmental and potable water mandates.
- Cold-Headed Mechanical Strength: Demonstrates the alloy's ability to work-harden. Supplied in a Hard Temper (H04), this MTC shows tensile and yield strengths significantly higher than annealed brass, making the fasteners structurally sound.
- Quality Compliance: 100% visual inspection and precision dimensional checks executed to ASME B18.2.1 standards. Completely non-magnetic.
Live Preview: UNS C26000 Cartridge Brass MTC Data
Review the specific nonferrous chemical limits and temper properties before downloading.
TC Number
S240/26-XX
TC Date
15.11.20XX
Material Spec
ASTM F468 / B134 UNS C26000
Bar Shape / Size
Round Wire / 10 mm
Dimensions / Item
Cold Headed Machine Screw M10-1.5P x 50 mm
Quantity
2000.00 NOS
Chemical Composition %
| Cu (Copper) | Pb (Lead) | Fe (Iron) | Zn (Zinc) |
|---|---|---|---|
| 70.50 | 0.02 | 0.01 | Rem (29.47) |
| Min: 68.5 Max: 71.5 |
Max: 0.07 | Max: 0.05 | Remainder |
Mechanical Properties (Hard Temper / H04)
| TENSILE STRENGTH (MPa) | YIELD STRENGTH 0.5% Ext (MPa) | % ELONGATION (GL-50mm) | HARDNESS (HRB) |
|---|---|---|---|
| 550.40 | 450.20 | 12.00 | 85, 84, 86 |
| Min: 495 (72 ksi) | Min: 345 (50 ksi) | Min: 8.0 | Min: 80 |
Standard References & Compliance
Our MTC certificates for nonferrous fasteners align with the stringent requirements of the marine, plumbing, and architectural industries. The test reports confirm exact compliance with ASTM F468 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. |
| Lead-Free Compliance | Lead content verified below 0.07%, compliant with restricted-lead regulations. |
| Dimensional Accuracy | All Dimensions are as per PO Specification / ASME B18.6.3. |
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 Headed / Cold Formed
- Hard Temper (H04) for maximum fastener strength
Testing Conditions
- Mechanical tests carried out at room temp
- 100% visual and thread gauging carried out
Technical FAQs — UNS C26000 Cartridge Brass MTC
Why is it called "Cartridge Brass"?
Historically, UNS C26000 was the alloy of choice for manufacturing military and sporting ammunition cartridges. The ~70% Copper to ~30% Zinc ratio provides the absolute maximum ductility of any brass alloy, allowing it to undergo severe deep drawing and expansion without tearing or cracking.
Why use C26000 over Free-Machining Brass (C36000) for fasteners?
UNS C36000 contains about 3% lead to make it easy to cut on a CNC lathe. However, that lead makes the metal brittle if you try to bend or hammer it. Because many bolts and screws are manufactured via cold heading (hammering a wire into the shape of a screw head), the highly ductile, lead-free C26000 must be used to prevent the heads from splitting during the forging process.
Is C26000 Cartridge Brass magnetic?
No. Like almost all standard copper-zinc brass alloys, C26000 is completely non-magnetic. This makes it an excellent choice for fastening electrical assemblies, compass housings, and equipment where magnetic interference cannot be tolerated.