Product details table:

Physical and Chemical Properties

Physical Properties

Appearance:
It usually presents a silvery-gray metallic color, with a ribbed or smooth surface texture depending on the type of rebar. The ribbed surface enhances bonding with concrete, while smooth rebars are used in specific applications. Surface treatments like epoxy coating or galvanizing can improve corrosion resistance and durability.

Density:
The density is generally around 7.85 g/cm³ , which is typical for carbon steel. This value may vary slightly depending on the alloy composition and manufacturing process.

Melting Point:
The melting point is relatively high, typically ranging from 1425°C to 1540°C , depending on the carbon content and alloying elements. This high melting point ensures stability in high-temperature environments during construction or industrial use.

Coefficient of Thermal Expansion:
The coefficient of thermal expansion is moderate, approximately 12×10⁻⁶/℃ at room temperature. This property allows steel rebars to maintain dimensional stability when embedded in concrete, even under significant temperature changes.

Thermal Conductivity:
The thermal conductivity is moderate, approximately 50-60 W/(m·K) , which is higher than stainless steel but lower than metals like copper or aluminum. This makes it suitable for structural applications where heat dissipation is not a primary concern.

Electrical Conductivity:
Steel rebars have relatively low electrical conductivity compared to metals like copper, typically around 10% of copper’s conductivity . They are unsuitable for high-current applications but may be used in grounding systems due to their mechanical strength.

Chemical Properties

Corrosion Resistance:
Steel rebars have limited corrosion resistance in untreated forms and are prone to rusting in humid or corrosive environments. To mitigate this, protective coatings such as epoxy or galvanizing are often applied. In reinforced concrete, the alkaline environment of the concrete provides some protection against corrosion, but chloride exposure (e.g., in marine environments) can still lead to rusting.

Antioxidation:
At high temperatures, steel rebars oxidize more readily than stainless steel. Prolonged exposure above 500°C can lead to scaling and reduced mechanical strength, making them unsuitable for extreme heat applications without additional protection.

Chemical Stability:
In general chemical environments, steel rebars exhibit moderate chemical stability. However, they react with acids, alkalis, and salts, particularly in aggressive environments like seawater or industrial chemical exposure. Corrosion resistance is limited in these conditions unless protective measures are taken.

Passivation:
Unlike stainless steel, steel rebars do not naturally form a dense passivation film. Protective measures such as epoxy coatings or cathodic protection systems are required to enhance durability and prevent corrosion in harsh environments.

Application:

Steel rebars are widely used in construction and infrastructure development due to their excellent tensile strength, ductility, and compatibility with concrete. They are essential for reinforcing concrete structures, including:

• Buildings and bridges: Providing structural integrity and load-bearing capacity.
• Roads and highways: Used in pavement reinforcement and bridge decks.
• Water-retaining structures: Such as dams, reservoirs, and water tanks, where durability is critical.
• Industrial facilities: Reinforcing heavy-duty structures like factory floors and equipment foundations.