CTCZ/CTCZM Series Copper-Chromium-Zirconium Alloy Contact Wire
Specifications
| Model | CTCZ/CTCZM |
|---|---|
| Standard | TB/T 2809-2026, Copper alloy contact wires for electrification railway OCS |
| Rated Voltage | For 25kV AC traction power supply systems |
| Design Speed | Up to 250km/h (by tension configuration) |
| Operating Temperature | -40℃~+70℃ |
| Altitude | <4000m |
| Materials | Copper-chromium-zirconium alloy (CuCrZr) |
| Installation | Installed in the contact suspension system, used with tension compensation devices |
CTCZ/CTCZM copper-chromium-zirconium alloy contact wire is a new alloy type added by TB/T 2809-2026, Copper alloy contact wires for electrification railway OCS. Chromium and zirconium are introduced into the copper matrix, gaining higher tensile strength and heat resistance through solid-solution strengthening and aging precipitation, making it the upgraded selection for large-tension contact suspensions of high-speed railways. The new standard grades the alloy by strength: the low class CTCZ (grade letter omitted) and the medium class CTCZM (suffix M), with sizes consolidated to 120mm2 and 150mm2.
Application: conductor for overhead contact systems of electrified railways, suitable for high-speed and heavy-haul railway contact suspensions, especially high-tension, high-wear and high-temperature-rise duty; can be combined with messenger wires, droppers and various clamps into a complete contact suspension.
Available models: CTCZ120, CTCZ150; CTCZM120, CTCZM150, selectable by line tension class and current collection requirements.
Standard: TB/T 2809-2026, Copper alloy contact wires for electrification railway OCS (effective 2026-9-1); section geometry is identical to same-size copper alloy contact wires.
Henan Chuangwit Railway Equipment Co., Ltd. supplies the full range of OCS conductors and associated fittings, supports volume procurement and customized supply, and provides selection consulting and end-to-end technical support for railway construction organizations. Hotline: 0375-6051688.
Main parameters of CTCZ/CTCZM series copper-chromium-zirconium alloy contact wires:
| Model | Key composition range | Tensile strength MPa ≥ (120 size) | Conductivity at 20℃ ≥ | Strength class |
|---|---|---|---|---|
| CTCZ120 / CTCZ150 | Cr 0.10%–0.80%, Zr 0.02%–0.10% | 469 | 90%IACS | Low strength class |
| CTCZM120 / CTCZM150 | Cr 0.20%–1.00%, Zr 0.02%–0.20% | 560 | 75%IACS | Medium strength class; CTCZM150 ultimate tensile force ≥82.87kN |
Table values follow TB/T 2809-2026 (draft-for-comment, Tables 3 and 4); ordered parameters are subject to the formally published standard text and the supply technical agreement.
Product Overview
CTCZ CTCZM copper-chromium-zirconium alloy contact wires are the upgraded contact wire line of Henan Chuangwit Railway Equipment Co., Ltd. for the high-speed railway market. Through chromium-zirconium precipitation strengthening, the alloy keeps conductivity of up to about 90% IACS while markedly raising strength and softening temperature; the medium class CTCZM150 offers tensile strength of at least 560MPa and ultimate tensile force of at least 82.87kN, the highest strength grade among current contact wire types.
Key Features
- Strength-class selection: the low class CTCZ balances conductivity and strength, the medium class CTCZM targets large-tension duty
- Good heat resistance with softening resistance superior to conventional copper alloys, adapting to high-temperature-rise sections of dense traffic
- Section geometry identical to same-size copper alloy contact wires; clamps and erection tooling are common
- Supplied to match the recommended test tension of TB/T 2809-2026
Compliance & Quality Control
The product complies with TB/T 2809-2026, Copper alloy contact wires for electrification railway OCS; chemical composition, tensile strength, conductivity, unit mass and fatigue performance are inspected to the standard. The company holds ISO9001 quality management system certification; every reel (batch) is delivered only after passing factory inspection.
Operating Conditions & Typical Applications
Suited to large-tension contact suspensions of high-speed railways, high-temperature-rise sections of heavy-haul lines and high-current mainlines with dense traffic. Typical applications include mainline contact suspensions of high-speed railways, reinforced sections of heavy-haul railways and high-current sections of terminal yards.
Selection & Service
The company provides end-to-end service from selection calculations and drawing confirmation to volume supply and on-site technical guidance. Products are controlled under the ISO9001 quality management system, and volume orders are delivered on contractual schedules. For technical support and commercial inquiries, please call 0375-6051688.
Performance
Operating Conditions
Suitable for high-speed and heavy-haul railway contact suspensions, enduring long-term current loading, vibration and atmospheric corrosion, and adapting to high-temperature-rise duty of dense traffic.
Mechanical Performance
Low strength class at least 469MPa and medium class at least 560MPa; section geometry identical to same-size copper alloy contact wires, with fatigue and straightness meeting pantograph current collection requirements.Electrical Performance
Conductivity at least 90% IACS (low class) and at least 75% IACS (medium class); CTCZM150 ultimate tensile force at least 82.87kN; ampacity satisfies traction power supply calculations.Applications
High-Speed Railways
CTCZ/CTCZM copper-chromium-zirconium alloy contact wires serve large-tension mainline contact suspensions of high-speed railways; CTCZM150 tensile strength is at least 560MPa.
Heavy-Haul Railways
Copper-chromium-zirconium alloy contact wires serve high-temperature-rise sections of heavy-haul lines; their heat-softening resistance suits heavy-load current collection.
Dense-Traffic Urban Rail Mainlines
CTCZ copper-chromium-zirconium alloy contact wires serve dense-traffic sections, balancing conductivity with high-temperature-rise performance.
