C17200 Copper (CDA 172)
Short Description:
C17200 is also known as Alloy 25 and is the most commonly utilized beryllium copper alloy and is notable for exhibiting the highest strength and hardness compared to commercial copper alloys. Its strength and hardness is similar to that of steel. C17200 copper's ultimate tensile and Rockwell hardness properties in a peak aged condition are in the 200 ksi range and RC 45 respectively (electrical conductivity 22% IACS minimum).

| Bronze, Copper & Brass Wire | |||
| Parameter | Bronze Wire (C51000 / C52100) | Copper Wire (C11000 / C10200) | Brass Wire (C26000 / C27000) |
| Material Type | Phosphor Bronze | Electrolytic Tough Pitch (ETP) / Oxygen-Free (OF) | Cartridge Brass / Yellow Brass |
| Standard | ASTM B159 / B206 | ASTM B1 / B3 / B33 | ASTM B134 / B135 |
| Diameter Range | 0.001" to 0.500" (0.025 mm to 12.7 mm) | 0.001" to 1.000" (0.025 mm to 25.4 mm) | 0.002" to 0.500" (0.05 mm to 12.7 mm) |
| Temper Condition | Soft, Half-Hard, Hard, Spring, Extra Spring | Soft, Half-Hard, Hard, Extra Hard | Soft, Half-Hard, Hard, Extra Hard |
| Tensile Strength (Ultimate) | 50 – 140 ksi (345 – 965 MPa) | 32 – 66 ksi (220 – 455 MPa) | 48 – 95 ksi (330 – 655 MPa) |
| Yield Strength (0.2% Offset) | 40 – 120 ksi (275 – 830 MPa) | 10 – 55 ksi (70 – 380 MPa) | 20 – 70 ksi (140 – 480 MPa) |
| Elongation (in 10") | 1 – 40 % | 1 – 45 % | 3 – 50 % |
| Hardness | 60 – 90 HRB (approx. 110 – 180 HV) | 40 – 80 HRF (approx. 45 – 85 HV) | 55 – 85 HRB (approx. 100 – 160 HV) |
| Density | 0.320 lb/in³ (8.86 g/cm³) | 0.323 lb/in³ (8.94 g/cm³) | 0.307 lb/in³ (8.50 g/cm³) |
| Magnetic Properties | Non-magnetic | Non-magnetic | Non-magnetic |
| Solderability | Excellent | Excellent | Very Good |







