What is C10100 copper material - Knowledge

1. What Material is C10100?

C10100 is a high-purity oxygen-free high conductivity (OFHC) copper classified under the UNS (Unified Numbering System) for metals. It is defined by its ultra-low oxygen content and exceptional copper purity, making it one of the most conductive copper grades available. Primarily specified in standards such as ASTM B152 (sheets/plates), ASTM B187 (wire), and ASTM B280 (tubing), C10100 is renowned for its superior electrical conductivity, thermal conductivity, ductility, and corrosion resistance-with minimal impurities that could compromise performance.

Key Material Characteristics:

Alloy Category: Unalloyed, oxygen-free copper (no intentional alloying elements; oxygen is strictly controlled to ultra-low levels).

Core Properties:

Electrical Conductivity: ≥101% IACS (International Annealed Copper Standard), the highest among common copper grades-ideal for high-precision electrical applications.

Thermal Conductivity: ~398 W/(m·K) (annealed state), excellent for heat transfer in critical systems.

Ductility: Elongation ≥45% (annealed), enabling complex forming processes (e.g., deep drawing, bending, welding) without cracking.

Corrosion Resistance: Resists atmospheric corrosion, fresh water, and non-oxidizing acids; suitable for vacuum environments and high-purity applications due to low outgassing.

Typical Applications:

Aerospace & defense: Satellite components, rocket engine cooling systems, and radar waveguides.

Electronics: Semiconductor manufacturing equipment, high-frequency connectors, and circuit boards.

Industrial: Vacuum systems, cryogenic equipment, and high-precision instrumentation.

Medical: Diagnostic equipment (e.g., MRI machines) and surgical instruments.

2. What is the Chemical Composition of C10100?

The chemical composition of C10100 is strictly regulated by international standards (e.g., ASTM B152, UNS) to ensure ultra-high purity and low oxygen content. Below is the detailed composition (mass percentage):

Element	Minimum Content	Maximum Content	Notes
Copper (Cu)	99.99%	100.00%	Includes silver (Ag), which is considered equivalent to copper in conductivity.
Silver (Ag)	-	0.01%	Allowed as a trace element (counted toward copper content).
Oxygen (O)	-	0.001%	Ultra-low oxygen is the defining feature of OFHC copper; prevents oxidation and outgassing.
Iron (Fe)	-	0.002%	Strictly controlled to avoid reducing conductivity and ductility.
Lead (Pb)	-	0.001%	Minimized to prevent brittleness and ensure compatibility with high-purity applications.
Zinc (Zn)	-	0.001%	Trace impurity; tightly restricted to maintain material integrity.
Sulfur (S)	-	0.001%	Controlled to avoid corrosion and performance degradation.
Total Impurities	-	0.01%	Sum of all trace elements (excluding Ag) must not exceed 0.01%.

3. What is the Hardness of C10100?

The hardness of C10100 is primarily determined by its temper (processing state)-annealed, cold-worked, or heat-treated. Below are the typical hardness values (measured by Brinell Hardness (HB) or Rockwell Hardness (HRB)) per industry standards:

Temper Designation	Processing Method	Brinell Hardness (HB)	Rockwell Hardness (HRB)	Key Properties
Annealed (ASTM O)	Heating to 400-600°C, holding, and slow cooling to relieve stresses.	40-60 HB	30-50 HRB	Softest state; maximum ductility and conductivity; ideal for forming.
Half-Hard (ASTM H01)	Partial cold working (10-20% reduction) after annealing.	65-85 HB	55-70 HRB	Balanced ductility and strength; suitable for general-purpose components.
Hard (ASTM H02)	Moderate cold working (20-30% reduction) after annealing.	90-110 HB	75-85 HRB	Increased strength and hardness; reduced ductility; used for structural parts.
Extra-Hard (ASTM H04)	Severe cold working (>30% reduction) after annealing.	120-140 HB	88-95 HRB	Highest hardness and strength; minimal ductility; for high-stress applications.