Chemical Composition ( %)

Element	C (max)	Mn (max)	P (max)	S (max)	Si	V, Nb, or Ti (optional)
% Range	0.23	1.35	0.04	0.05	0.40	Added for grain refinement

Chemical properties

Property	Value / Range
Yield Strength	≥ 50 ksi (345 MPa)
Tensile Strength	65–80 ksi (450–550 MPa)
Elongation	18–21% (in 2")
Impact Toughness	Tested at -6°C (20°F)
Hardness (Brinell)	~135 HB

Common Applications

Industry	Typical Applications
Structural & Construction	Building frames (beams, columns) Industrial warehouses Prefabricated structures
Bridge & Infrastructure	Highway/railway bridges Overpasses Tunnel supports
Heavy Equipment	Cranes & excavators Mining machinery Agricultural equipment
Energy Sector	Wind turbine towers Transmission poles Power plant structures
Transportation	Truck/trailer chassis Railcar components Barge construction
Industrial Fabrication	Storage tanks Conveyor systems Work platforms

Introduction

The A572 Gr.50 Alloy Steel Plate is a high-strength, low-alloy steel plate commonly used in structural applications. It is part of the ASTM A572 specification, which is the standard for high-strength, low-alloy steel designed for riveted, bolted, or welded structures in bridges, buildings, and other general structural uses.

Advantages

Excellent Mechanical Properties
The A572 Gr.50 Alloy Steel Plate exhibit excellent mechanical properties, with a yield strength of no less than 345 MPa, a tensile strength range of 450–600 MPa, and an elongation of over 20%.

Excellent Welding Performance
Our products have a low carbon equivalent, which minimizes the likelihood of defects such as cracks during welding. This results in high weld joint strength and minimal welding deformation. Whether it's manual arc welding, gas shielded welding, or submerged arc welding, the steel plate demonstrates excellent welding adaptability, providing great convenience for processing and manufacturing.

A572 Gr.50 Equivalent Steel Grades Comparison Table

Standard	Equivalent Grade	Standard Code
ASTM (USA)	A572 Gr.50	ASTM A572/A572M
GB (China)	Q355B (ex-Q345B)	GB/T 1591-2018
GB (China)	Q355C/Q355E	GB/T 1591-2018
GB (China)	Q345GJ	GB/T 19879-2015
EN (Europe)	S355J2	EN 10025-2
CSA (Canada)	50W / 350W	CSA G40.21