TTMg0.4 Magnesium Copper/QMg0.4 Magnesium Bronze C18661

Comprehensive Analysis of TMg0.4 Magnesium Copper/QMg0.4 Magnesium Bronze (C18661)

I. Chemical Composition and Material Properties

Chemical Composition

TMg0.4 Magnesium Copper (C18661): Copper-based (balance), magnesium content approximately 0.4%, total impurities ≤0.3% (such as iron, zinc, etc.), compliant with international standards such as ASTM.

QMg0.4 Magnesium Bronze: Presumed to be a domestic grade, part of the same series as QMg0.8 (magnesium content 0.7-0.85%), with magnesium content adjusted to around 0.4%, enhancing conductivity and heat resistance in the copper matrix.

Physical Properties

Conductivity: TMg0.4 Magnesium Copper has an electrical conductivity ≥90% IACS (International Annealed Copper Standard), suitable for high-frequency conductive applications.

Corrosion Resistance: Excellent performance in seawater, humid environments, and weak acid-base media, ideal for marine and chemical equipment.

II. Mechanical Properties and Processing Characteristics

Mechanical Properties

Tensile Strength: Can exceed 390 MPa after cold working (plates or rods).

Hardness: Approximately 180 HV in Rockwell hardness (cold-worked state), lower in annealed state (≤75 HB).

Elongation: ≥35% in annealed state, slightly reduced after cold working.

Processing Techniques

Hot Working Temperature: Recommended 780-800°C, avoiding magnesium volatilization (toxic gas).

Delivery State: Available in annealed (R), cold-worked (Y), and other states; customizable as plates, rods, wires, and hollow tubes.

III. Core Application Areas

Electronics and Electrical Industry

High-Frequency Conductive Components: Waveguides, transmission line connectors, semiconductor device supports, utilizing high conductivity and heat resistance.

Cables and Antennas: Replaces cadmium bronze (e.g., QMg0.8) for aircraft antennas and high-precision cable conductors.

Mechanical and Aerospace

Wear-Resistant Components: Bearings, gears, high-strength bolts, balancing wear resistance and lightweight requirements.

Aerospace Structural Parts: Navigation system casings, turbine blade connectors, suitable for high-temperature and corrosion-resistant environments.

Marine and Chemical Equipment

Corrosion-Resistant Structures: Seawater pump valves, chemical pipeline linings, resistant to seawater and acid-base media erosion.

IV. Selection and Standard Reference

Dimension TMg0.4 Magnesium Copper (C18661) QMg0.4 Magnesium Bronze

Naming Standard US/International (e.g., ASTM B624) Domestic Grade (similar to GB/T 13808)

Form Adaptation Primarily plates, strips, hollow tubes Primarily rods, wires, suitable for precision machining

Performance Focus High conductivity, corrosion resistance High strength, wear resistance, and high-temperature fatigue resistance