About 304HC Cold Heading Wire

304HC cold heading wire is a high-quality stainless steel wire renowned for its exceptional cold forming properties. With a composition of 18% chromium and 8% nickel, it offers superb corrosion resistance and mechanical strength, making it ideal for manufacturing various fasteners, bolts, screws, and other precision components used in demanding applications.


304HC Cold Heading Wire Chemical Compositions:

The chemical composition of 304HC cold heading wire typically includes:-

  • Chromium (Cr): 18%
  • Nickel (Ni): 8%
  • Carbon (C): 0.08% maximum
  • Manganese (Mn): 2% maximum
  • Silicon (Si): 1% maximum
  • Phosphorus (P): 0.045% maximum
  • Sulphur (S): 0.03% maximum

These elements contribute to its corrosion resistance, strength, and cold forming capabilities.


304HC Cold Heading Wire Physical Properties:

  1. Tensile Strength: Typically ranging from 600 to 800 MPa, providing excellent strength for various applications.
  2. Yield Strength: Around 250 to 300 MPa, indicating the stress level at which the material starts to deform permanently.
  3. Elongation: Usually between 40% to 60%, demonstrating its ability to stretch without breaking under tension.
  4. Density: Approximately 8.0 g/cm³, indicating its mass per unit volume, essential for determining weight and volume considerations in applications.
  5. Melting Point: Approximately 1400-1450°C, defining the temperature at which the material transitions from solid to liquid state, crucial for processing and manufacturing.
  6. Thermal Conductivity: Around 16.2 W/m·K, signifying its ability to conduct heat, relevant for applications where thermal management is critical.
  7. Electrical Conductivity: Typically 1.45 μΩ·m, indicating its ability to conduct electricity, important for applications requiring electrical connectivity.
  8. Magnetic Properties: Generally non-magnetic in the annealed condition, but may exhibit some magnetism after cold working.

These properties collectively make 304HC cold heading wire suitable for a wide range of industrial and engineering applications, including fastener manufacturing, automotive components, and precision instruments.


304HC Cold Heading Wire Mechanical Properties:

  1. Tensile Strength: Typically between 600 to 800 MPa, indicating the maximum stress the material can withstand while being stretched or pulled before breaking. It reflects its structural integrity and load-bearing capacity.
  2. Yield Strength: Around 250 to 300 MPa, representing the stress level at which the material begins to deform plastically, indicating its ability to return to its original shape after deformation.
  3. Elongation: Typically ranging from 40% to 60%, demonstrating the material’s ability to stretch or elongate before rupture, crucial for applications requiring ductility and formability.
  4. Hardness: Generally in the range of 85 to 95 HRB (Rockwell B Hardness) or 180 to 220 HV (Vickers Hardness), indicating its resistance to indentation or scratching, essential for assessing its wear resistance and machinability.
  5. Modulus of Elasticity (Young’s Modulus): Approximately 193 GPa, representing the material’s stiffness or resistance to deformation under stress, crucial for understanding its behavior under load.
  6. Impact Strength: Usually not specified directly for cold heading wire, but it indirectly relates to the material’s toughness, which is influenced by its composition, microstructure, and processing conditions.

These mechanical properties collectively determine the performance and suitability of 304HC cold heading wire for various applications, including fastener manufacturing, automotive components, and precision engineering.


304HC Cold Heading Wire Applications:

304HC cold heading wire finds applications in various industries and sectors due to its excellent corrosion resistance, mechanical properties, and cold forming capabilities. Some common applications include:

  1. Fastener Manufacturing: Used to produce bolts, screws, nuts, and other fasteners for construction, automotive, aerospace, and marine industries due to its corrosion resistance and mechanical strength.
  2. Automotive Components: Utilized in the production of automotive parts such as bolts, studs, and clips due to its resistance to corrosion, high tensile strength, and suitability for cold forming processes.
  3. Precision Engineering: Employed in the manufacture of precision components like shafts, springs, and fittings due to its excellent dimensional stability, formability, and resistance to wear and tear.
  4. Electrical and Electronics: Used in the production of electrical connectors, terminals, and small precision components due to its electrical conductivity, corrosion resistance, and ability to maintain dimensional accuracy.
  5. Construction: Employed in construction applications for fastening structural elements such as beams, columns, and panels due to its strength, durability, and resistance to environmental factors.
  6. Medical Devices: Utilized in the fabrication of surgical instruments, orthopedic implants, and medical equipment components due to its biocompatibility, corrosion resistance, and ease of sterilization.
  7. Aerospace and Defense: Used in aerospace applications for manufacturing critical components like fasteners, fittings, and hydraulic parts due to its high strength-to-weight ratio, corrosion resistance, and reliability.
  8. Marine Industry: Employed in marine applications for producing hardware, rigging components, and fasteners due to its resistance to corrosion in marine environments.

These applications highlight the versatility and suitability of 304HC cold heading wire across various industries where corrosion resistance, mechanical strength, and cold forming capabilities are essential.