A572 Steel Plate

Q: What is the difference between A36 and A572 plate?

A36 is a mild carbon structural steel (ASTM standard), while A572 is a high-strength low-alloy (HSLA) steel optimized with alloying elements like manganese, vanadium, and niobium. Core differences:Strength: A36 has a minimum yield strength of 250MPa; A572’s mainstream Gr50 reaches 345MPa (38% higher).Toughness: A572 requires -20°C low-temperature impact performance, while A36 has no mandatory low-temperature specifications.Cost & Applications: A36 is more cost-effective for general construction/lightweight structures; A572 reduces weight by 10%-20%, suitable for heavy-load scenarios like bridges/heavy machinery.Weldability: A36 is more weldable; A572 needs matching welding processes but no complex preheating.

TongHui is one of the leading A572 steel plates manufacturers and suppliers in China, located in Liaocheng, Shandong Province.
As a benchmark product for high yield strength structural steel, A572 steel plate covers mainstream grades such as Gr50/Gr65, with excellent tensile strength, corrosion resistance, and ease of processing. It is widely used in construction engineering, bridge construction, mechanical manufacturing, and other fields. We directly supply genuine products from the original factory and support customized specifications and bulk procurement. Welcome to inquire!

What is A572 Steel Plate

A572 steel plate is a high-strength low-alloy (HSLA) structural steel complying with ASTM standards, featuring excellent yield strength, toughness, and weldability. Its primary grades include Gr50 (345 MPa yield strength) and Gr65 (450 MPa yield strength). Optimized by adding alloying elements like manganese and vanadium, it balances lightweight properties and load-bearing capacity, reducing structural weight and costs. Widely used in bridge construction, building frames, machinery manufacturing, pressure vessels, and transportation equipment, it is produced strictly in accordance with ASTM A572 standards. Available in full size ranges with customizable processing, it is a preferred structural steel product with both cost-effectiveness and reliability for foreign trade exports.

A572 Steel Plate Price

Main FOB China Prices of A572 Steel Plate:

Gr50 (16-20mm hot-rolled): 560-620 USD/ton
Gr65 (same specifications): 80-120 USD/ton higher than Gr50, approximately 640-740 USD/ton

Prices are affected by specifications, purchase volume, processing requirements, and market factors: Thin-gauge plates (≤6mm) or extra-thick plates (≥50mm) have a 10%-25% price increase due to complex production processes; bulk purchases (≥50 tons) are eligible for a 5%-10% discount. Additionally, raw material costs, alloy element content, heat treatment processes, and logistics fees will also impact the final pricing.

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A572 Steel Plate Properties

Excellent Mechanical Properties

As a high-strength low-alloy (HSLA) structural steel, it features outstanding yield strength—Grade 50 reaches 345MPa and Grade 65 reaches 450MPa. It also boasts excellent toughness and tensile strength, maintaining stable mechanical properties even in low-temperature environments. This effectively reduces structural weight while enhancing load-bearing safety.

Superior Weldability

Its chemical composition is compatible with various welding processes (arc welding, gas shielded welding, etc.). No complex preheating or post-weld heat treatment is required during welding, with good weld formation and high joint strength. It meets the welding needs of large steel structures such as bridges and building frames.

Good Processing and Formability

It exhibits excellent bending, stamping, cutting, and machining performance, enabling easy manufacturing of complex structural components. Deformation is uniform during hot and cold processing, with high dimensional stability, adapting to both mass production and customized processing requirements.

Corrosion Resistance

Optimized with alloying elements like manganese and vanadium, it offers superior atmospheric corrosion resistance compared to ordinary carbon steel, suitable for outdoor, humid, and other working conditions. Additionally, it has excellent fatigue resistance, ensuring a longer service life in long-term dynamic load environments (e.g., bridges, construction machinery).

A572 Steel Plate Application Field

Our A572 steel plate is applied in various fields！

Construction Engineering

Bridges and Infrastructure

Machinery Manufacturing

Frequently Asked Questions

What is A572 grade steel?

A572 grade steel is a high-strength low-alloy (HSLA) structural steel compliant with the American ASTM A572 standard, primarily used in engineering scenarios requiring high load-bearing capacity and lightweight design. Its main grades include Gr42 (yield strength 290MPa), Gr50 (345MPa), and Gr65 (450MPa). Optimized by adding alloying elements such as manganese and vanadium, it combines excellent toughness, weldability, and formability.

Compared to ordinary carbon steel, A572 grade steel reduces structural weight by 10%-20% while enhancing strength, lowering overall costs. Widely applied in bridge construction, building frames, machinery manufacturing, pressure vessels, and transportation equipment, it is produced strictly in accordance with ASTM standards with complete size specifications. Recognized as a cost-effective structural steel globally, it is also a popular industrial material for foreign trade exports.

What is the difference between A36 and A572 plate?

A36 is a mild carbon structural steel (ASTM standard), while A572 is a high-strength low-alloy (HSLA) steel optimized with alloying elements like manganese, vanadium, and niobium. Core differences:

Strength: A36 has a minimum yield strength of 250MPa; A572’s mainstream Gr50 reaches 345MPa (38% higher).
Toughness: A572 requires -20°C low-temperature impact performance, while A36 has no mandatory low-temperature specifications.
Cost & Applications: A36 is more cost-effective for general construction/lightweight structures; A572 reduces weight by 10%-20%, suitable for heavy-load scenarios like bridges/heavy machinery.
Weldability: A36 is more weldable; A572 needs matching welding processes but no complex preheating.

How thick is ASTM A572 plate?

Thickness of ASTM A572 plates varies by grade, with core specifications as follows:

Gr42: 4″–6″ (mainstream for extra-thick plates), minimum thickness down to 0.100″
Gr50: 3/16″ (0.188″)–4″, the most commonly used, covering most structural applications
Gr65: 3/16″–2″, suitable for lightweight and high-strength scenarios
The entire series has a minimum thickness of 0.100″ and a maximum of 6″. Tolerances comply with ASTM standards, and thin/extra-thick plates have a slightly higher price due to complex manufacturing processes.