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| Property | Value |
|---|---|
| UNS Number | C12200 |
| ASTM Standard | ASTM B152 / B283 |
| Tensile Strength | 220–350 MPa |
| Yield Strength | 70–310 MPa |
| Density | 8.94 g/cm³ |
| Max Service Temperature | 150°C |
| Element | Composition (%) |
|---|---|
| Cu | ≥99.9% |
| P | 0.015–0.040% |
| O | ≤0.005% |
| Pb | ≤0.005% |
| Bi | ≤0.001% |
Copper C12200, also known as DHP copper (deoxidized high phosphorus), derives its properties primarily from residual phosphorus content of 0.015–0.040%, which acts as a deoxidizing agent during melting. This controlled phosphorus addition eliminates oxygen embrittlement and enhances weldability without significantly compromising the metal’s inherent electrical and thermal conductivity. The minimal alloying content ensures the material retains near-pure copper characteristics, including excellent ductility and formability, making it ideal for cold heading and thread rolling operations common in fastener manufacturing.
C12200 fasteners offer outstanding corrosion resistance in atmospheric, freshwater and mildly acidic environments, along with excellent thermal and electrical conductivity for specialized applications. Its superior ductility allows fabrication of complex fastener geometries without cracking, while its resistance to stress corrosion cracking ensures long-term reliability. These properties, combined with ease of soldering and brazing, make DHP copper fasteners well-suited for plumbing, electrical, marine and architectural applications requiring durable, corrosion-resistant, non-magnetic hardware.
Specifications
Copper C12200 (DHP) Fasteners are specified by their balance of ductility, strength, and corrosion resistance, with dimensional tolerances, thread geometry, and general technical data governing fit and performance. The material is defined by mechanical properties and precise size requirements for dependable fastening applications.
| Property | Value |
|---|---|
| Tensile Strength | 220–250 MPa |
| Yield Strength | 70–90 MPa |
| Elongation | 40–45% |
| Hardness | 40–50 HRF |
| Modulus of Elasticity | 110–120 GPa |
| Thermal Conductivity | 391 W/m·K |
| Thermal Expansion | 17.0 x10⁻⁶/°C |
| Density | 8.94 g/cm³ |
| Melting Range | 1065–1083°C |
| Max Service Temperature | 150°C |
| Specification | Details |
|---|---|
| Bolt Standard | ASME B18.2.1, DIN 933 |
| Stud Bolt Standard | ASME B18.31.2 |
| Nut Standard | ASME B18.2.2, DIN 934 |
| Washer Standard | ASME B18.22.1, DIN 125 |
| Thread Form | UNC, UNF, Metric |
| Diameter Range | M3–M64 / #4–2.5" |
| Length Range | 10mm–300mm |
| Available Forms | Bolts, Nuts, Studs, Washers, Screws |
| Custom Sizes | Available on request |
| Manufacturing Standard | ASTM B152, ASME B18 |
Applications
