UNS C36000 Free-Cutting Brass Fasteners – MTC
UNS C36000 Free-Cutting Brass Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for UNS C36000 (Free-Cutting Brass) fasteners. Review the specific documentation verifying the essential 3% Lead addition that defines the industry standard for 100% machinability rating.
What's Inside This C36000 Brass MTC
This sample mill test certificate details the specific parameters required for UNS C36000 fasteners. Known universally as "Free-Cutting Brass" or "Free-Machining Brass", this alloy sets the baseline standard (100% rating) by which the machinability of all other copper alloys is judged.
- Full Traceability: Certified with TC No.: S255/26-XX and mapped to ASTM F468 and ASTM B16 specifications for nonferrous machined bolting.
- Lead Addition Verification: Explicitly verifies the intentional 2.50 - 3.00% Lead (Pb) content. This addition acts as a microscopic internal lubricant, causing chips to break off cleanly during high-speed CNC turning.
- Base Chemistry: Confirms the standard 60-63% Copper and remainder Zinc base matrix, providing the classic yellow brass appearance and excellent general corrosion resistance.
- Mechanical Strength: Demonstrates the alloy's strength in the typical Half-Hard (H02) temper, ensuring the final machined fastener has adequate tensile and yield properties for mechanical assemblies.
- Quality Compliance: 100% visual inspection and precision thread gauging executed to ASME B18.2.1 standards. Completely non-magnetic.
Live Preview: UNS C36000 Free-Cutting Brass MTC Data
Review the specific chemical limits emphasizing the Lead content before downloading.
TC Number
S255/26-XX
TC Date
12.01.20XX
Material Spec
ASTM F468 / B16 UNS C36000
Bar Shape / Size
Hexagon Bar / 16 mm
Dimensions / Item
CNC Machined Hex Bolt M16-2.0P x 60 mm
Quantity
1500.00 NOS
Chemical Composition %
| Cu (Copper) | Pb (Lead) | Fe (Iron) | Zn (Zinc) |
|---|---|---|---|
| 61.50 | 2.85 | 0.10 | Rem (35.55) |
| Min: 60.0 Max: 63.0 |
Min: 2.5 Max: 3.0 |
Max: 0.35 | Remainder |
Mechanical Properties (Half-Hard Temper / H02)
| TENSILE STRENGTH (MPa) | YIELD STRENGTH 0.5% Ext (MPa) | % ELONGATION (GL-50mm) | HARDNESS (HRB) |
|---|---|---|---|
| 410.50 | 275.20 | 15.00 | 78, 80, 77 |
| Min: 330 (48 ksi) | Min: 170 (25 ksi) | Min: 10 | Min: 70 |
Standard References & Compliance
Our MTC certificates for nonferrous fasteners align with the stringent requirements of the fluid power, pneumatic, and architectural hardware industries. The test reports confirm exact compliance with ASTM F468 and ASTM B16 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. |
| Machinability Rating | Material conforms to the 100% base rating standard. |
| 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
- Drawn Bar Stock (Not Cold Headed)
- Half-Hard Temper (H02) for stability
Testing Conditions
- Mechanical tests carried out at room temp
- 100% thread profile gauging carried out
Technical FAQs — UNS C36000 Free-Cutting Brass MTC
Why is Lead (Pb) added to C36000?
The addition of 2.5% to 3.0% Lead is the defining characteristic of C36000. Lead does not dissolve into the copper-zinc matrix; instead, it disperses as tiny particles throughout the metal. When machined, these lead particles act as chip-breakers and solid lubricants. This prevents the metal from galling or wrapping around cutting tools, drastically reducing tool wear and enabling extremely high-speed CNC manufacturing.
Is C36000 suitable for cold-headed fasteners?
No. While the lead addition makes it perfect for cutting and turning, it makes the alloy inherently brittle if subjected to severe impact or deformation. For fasteners that are forged via "cold heading" (hammering wire into a bolt head), Cartridge Brass (UNS C26000) must be used. C36000 fasteners are almost exclusively turned from hexagonal or round bar stock.
Are there regulatory concerns with C36000?
Because it contains nearly 3% Lead, C36000 fasteners do not meet the stringent "Lead-Free" requirements of modern potable (drinking) water regulations (such as the US Safe Drinking Water Act). However, for general industrial, electrical, pneumatic, and architectural applications, it remains the dominant brass alloy globally.