What is the difference between 304 and A36 carbon steel plate

Oct 24, 2025

Leave a message

ASTM A36 steel plate is a common structural steel that is used for a variety of applications. It is a low-carbon steel with good strength, formability, and excellent welding properties.

info-427-427

This steel plate is widely used in construction, agriculture, automotive, and many others because of its properties. ASTM A36 steel plate can also be used in other applications such as bolts, nails, screws, and other fasteners. This blog post will discuss the properties, uses and composition of ASTM A36 steel plate.

 

Products Description

 

ASTM A36 is a standard carbon steel grade defined by the American Society for Testing and Materials (ASTM). It is cost-effective, easy to process, and readily available across global markets.

 

With a minimum yield strength of 36,000 psi (250 MPa) and tensile strength ranging from 58,000–80,000 psi (400–550 MPa), A36 demonstrates a balance of toughness and flexibility. This makes it ideal for load-bearing structures including bridges, buildings, machinery frames, automotive parts, and equipment components.

 

Because of its exceptional weldability, A36 is often chosen by fabricators and workshops for projects requiring on-site assembly or repair without the need for complex heat treatments.

 

Properties of ASTM A36 Steel Plate

 

Yield Strength: 36,000 psi (250 MPa)

Tensile Strength: 58,000–80,000 psi (400–550 MPa)

Elongation at Break: 20% (for plates up to 200 mm thick)

Good notch toughness at sub-zero temperatures

Excellent weldability and formability

 

Chemical Composition

 

Element Percentage (%) Function
Carbon (C) ≤ 0.25 Increases strength and hardness
Manganese (Mn) ≤ 0.40–1.20 Enhances toughness and ductility
Silicon (Si) ≤ 0.28 Improves strength and deoxidation
Phosphorus (P) ≤ 0.04 Enhances machinability
Sulfur (S) ≤ 0.05 Improves cutting ability
Iron (Fe) Balance Base element providing structure

 

Applications of ASTM A36 Steel Plate

Structural Plate

A36 is the most widely used carbon steel plate for structural purposes. It is easy to machine, form, drill, and weld, which makes it ideal for bridges, buildings, and industrial structures. The smooth surface and reliable strength allow it to perform well under various load conditions.

 

Pressure Vessel Components

A36 steel plates are used in the fabrication of boilers, heat exchangers, and pressure vessels, owing to their good weldability and mechanical strength. They can withstand moderate pressure and temperature environments efficiently.

 

Storage Tanks

Due to its durability and corrosion resistance, A36 steel is suitable for liquid and gas storage tanks. Its ease of fabrication allows engineers to create large containers with tight tolerances and uniform welds.

 

Pipe and Tube Production

A36 is also employed in the manufacturing of pipes, flanges, and fittings. Its formability and machinability make it ideal for shaping into cylindrical or complex geometries while maintaining structural integrity.

 

info-536-393