Ordinary Carbon Structural Steel Coils

Ordinary Carbon Structural Steel Coils refer to coiled steel products composed primarily of iron and carbon—characterized by a low carbon content (typically ≤ 0.25%)—and produced through hot rolling or cold rolling processes. These coils are predominantly utilized in general engineering structures and mechanical manufacturing applications.

Key Definitional Points

Material Characteristics: Primarily low-carbon steel, containing trace amounts of elements such as manganese and silicon.

Product Form: Supplied in coil form (Steel Coil) to facilitate ease of transport and subsequent processing.

Manufacturing Process: Typically produced via hot rolling or cold rolling methods.

Applicable Standards: Adheres to Chinese standards such as Q195, Q215, Q235, and Q255 (analogous to international standards such as ASTM A36).

Performance Characteristics

Possesses good plasticity and toughness, making it easy to process and form.

Exhibits excellent weldability.

Features low production costs, offering high cost-effectiveness.

Provides moderate strength, making it suitable for general load-bearing structures.

Mainstream Materials and Core Comparison

Core Advantages and Application Scenarios of Ordinary Carbon Structural Steel Coils of Different Materials

1. Q195: Extreme Plasticity, Cost-Effective

Advantages: Lowest carbon content, extremely high plasticity and ductility, no pressure during bending/stretching/stamping, most competitive price, suitable for mass production of basic components.

Applications: Low-pressure fluid conveying pipes, strapping, iron wire, washers, cotter pins, thin-walled stamped parts, welded wire mesh, and other low-load, high-formability applications.

2. Q215: Balanced Performance

Advantages: Higher strength than Q195, good plasticity retention, excellent weldability, strong adaptability to cold and hot working, and a balance between cost and performance.

Applications: Small and medium-sized welded structures, light agricultural machinery parts, furniture frames, electrical box housings, general fasteners, non-load-bearing steel structures.

3. Q235B: High versatility

Advantages: Widest application, moderate strength, balanced processing performance, stable toughness at room temperature, suitable for over 90% of general applications.

Applications: Building steel structure beams and columns, machinery bases, vehicle bodies, pipe supports, warehouse racks, crane structural components, general engineering steel.

4. Q235C/D: Suitable for low temperatures and extreme cold

Advantages: Improved low-temperature impact toughness compared to Q235; Grade C withstands 0℃, Grade D withstands -20℃, with stricter control over harmful elements (P/S).

Applications: Grade C is used for buildings, bridges, and outdoor equipment in cold regions; Grade D is used for engineering projects in extremely cold regions, winter construction projects, and machinery in low-temperature environments.

5. Q275: Strength Benchmark, Preferred for Heavy Loads

Advantages: Highest strength, outstanding hardness and wear resistance, strong load-bearing capacity, suitable for high-stress conditions.

Applications: Heavy-duty mechanical gears, high-strength bolts, mining machinery parts, wear-resistant liners, high-load structural components.

Selection Recommendations:

Low load, high formability requirements → Choose Q195, lowest cost

General applications, cost-effectiveness priority → Choose Q235B, strong adaptability

High load, high strength requirements → Choose Q275, optimal load-bearing capacity