C17200 Copper (CDA 172)
Short Description:
Standards: ASTM B196, AMS 4533, SAE J461, RWMA CLASS IV, CuBe2 2.1247
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 Square Bars | |||
| Parameter | Bronze Square Bar (C93200 / C95400) | Copper Square Bar (C11000 / C12200) | Brass Square Bar (C36000 / C38500) |
| Material Type | Bearing Bronze / Aluminum Bronze | Electrolytic Tough Pitch (ETP) / Phosphorus Deoxidized | Free-Cutting Brass / Architectural Bronze |
| Standard | ASTM B505 / B124 | ASTM B187 / B124 | ASTM B16 / B453 |
| Size Range (A/F) | 1/4" to 4" (6 mm to 102 mm) | 1/8" to 4" (3 mm to 102 mm) | 1/8" to 4" (3 mm to 102 mm) |
| Length | 13" (330 mm) or 6.5 ft (2 m) stock | 12 ft (3.66 m) or Custom | 12 ft (3.66 m) or Custom |
| Temper Condition | As Cast / Annealed (O60) | Soft (Annealed – O60), Half-Hard (H58), Hard (H80) | Half-Hard (H02), Hard (H04) |
| Tensile Strength (Ultimate) | 35,000 – 103,000 psi (240 – 710 MPa) * | 30 – 38 ksi (210 – 260 MPa) | 48 – 65 ksi (330 – 450 MPa) |
| Yield Strength (0.5% Ext.) | 18,000 – 52,000 psi (125 – 360 MPa) * | 10 – 30 ksi (70 – 205 MPa) | 20 – 45 ksi (140 – 310 MPa) |
| Hardness (Brinell) | 65 – 220 HB * | 40 – 50 HB | 80 – 110 HB |
| Corrosion Resistance | Excellent (seawater) to Moderate * | Excellent | Good |
| Typical Applications | Bushings, valve seats, wear plates, pump components, guide blocks, heavy-duty fasteners | Bus bars, grounding squares, electrical connectors, heat sinks, decorative hardware, fasteners | Nuts, bolts, valve stems, lock components, gears, screw machine parts, ornamental trim, architectural hardware |








