CuBe2
CW101CTHE highest-strength copper alloy — UTS up to 1400 MPa (200 ksi), approaching steel strength with copper's conductivity (22% IACS aged). Age-hardenable: solution treat 780-800°C, age 315-340°C → HRC 38-45. Non-sparking, non-magnetic. Trade names: Alloy 25 (Materion), BeCu25 (NGK). CAUTION: Be dust is carcinogenic — machining requires extraction. Used for non-sparking tools, mold inserts, springs, connectors, and resistance welding electrodes.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | UNS | USA | UNS C17200 | C17200 | REF |
| 🇪🇺 | EN | Europe | CuBe2 / CW101C / 2.1247 | CW101C | 100% |
| 🇯🇵 | JIS | Japan | C1720 | — | 100% |
Sources: ASTM B196, EN 12163, JIS H3270
Chemical composition comparison (wt%)
Side-by-side: CuBe2 (EN 12163) vs CuBe2 / CW101C / 2.1247 (EN) (EN 12163)
| Element | CuBe2 (EN 12163) | CuBe2 / CW101C / 2.1247 (EN) | Overlap |
|---|---|---|---|
| Ni | — | 0–0.3% | — |
| Cu | — | — | — |
Mechanical properties
Compatibility verdict
CuBe2 and CuBe2 / CW101C / 2.1247: 100% composition match
Related materials
CuZn39Pb3
2.0401The most widely used free-cutting brass (machinability index 100%). Excellent for high-speed automatic lathe work. Used for turned parts, faucets, valves, fittings, screws, nuts, electrical connectors, and watch components. Also known as MS58.
CuSn8
2.1030Phosphor bronze with 8% tin. High mechanical strength, excellent wear resistance, good corrosion resistance (especially seawater). Self-lubricating sliding properties. Used for heavy-duty bearings, gears, worm wheels, springs, sliding elements, and connectors.
CuZn37
2.0321Lead-free alpha/alpha+beta brass (63% Cu, 37% Zn). Compromise between cold formability (CuZn35) and hot formability (CuZn40). The most widely used unleaded brass. Used for cartridge cases, radiator cores, lamp components, plumbing fixtures, and decorative hardware.
Export this comparison as PDF
Professional datasheet with equivalents, composition, and properties. Ready for your QM documentation.
Download PDF — €4.90Included with PRO subscription