China A572 Gr.42 Steel Plate Supplier for Structural Fabrication

ASTM A572 Grade 42 Steel Plate is a high-strength low-alloy (HSLA) structural steel designed for projects requiring better strength-to-weight performance than ordinary carbon steel. Compared with ASTM A36, Grade 42 provides higher yield strength while maintaining excellent weldability and fabrication performance, making it a practical choice for bridges, buildings, heavy equipment, and structural components.

As a China A572 Gr.42 Steel Plate Supplier, we supply hot rolled plates with stable mechanical properties, complete mill certificates, and custom processing for international projects.

Product Specifications

Item	Details
Standard	ASTM A572 / ASME SA572
Grade	Grade 42
Thickness	6–200 mm
Width	1,000–3,500 mm
Length	2,000–12,000 mm
Delivery Condition	Hot Rolled
Processing Service	Flame Cutting, Plasma Cutting, Drilling, CNC Machining

Item	Value
Carbon (C)	≤ 0.21%
Manganese (Mn)	≤ 1.35%
Phosphorus (P)	≤ 0.040%
Sulfur (S)	≤ 0.050%
Silicon (Si)	0.15–0.40% (typical)
Yield Strength	≥290 MPa (42 ksi)
Tensile Strength	415–550 MPa
Elongation	≥20%

Product Features

Higher Strength, Reduce Your Overall Material Cost

ASTM A572 Gr.42 features a minimum yield strength of 290 MPa, much stronger than ordinary A36 carbon steel. Engineers can adopt thinner steel plates to cut total steel weight without losing load-bearing capacity. It effectively lowers your expenditure on raw materials, transportation and anti-corrosion coating.

User-Friendly Welding, Boost Mass Production Efficiency

This low-alloy steel does not require complex high-temperature preheating for most welding tasks. It works well with MIG, TIG and arc welding. You can save labor and energy costs, shorten assembly time and avoid welding deformation during large-batch manufacturing.

Stable Flatness & Precise Size Fits All Fabrication

Our A572 Gr.42 steel plates are produced under strict rolling control, free from warping and surface ripples. The stable plate quality supports laser cutting, precision bending, full penetration welding and CNC machining, widely used by structural fabricators and machinery OEMs.

In-House Custom Processing Shortens Your Lead Time

We supply standard full-size steel plates, and also process customized parts as per your drawings, including cutting blanks, base plates, gussets and structural components. We provide one-stop services like slitting, flame/plasma cutting, bending and surface pretreatment. You will get finished parts ready for assembly, no secondary processing required in your factory.

Typical Applications

Steel building structures
Bridge components
Construction machinery
Mining equipment
Industrial platforms
Trailer and truck chassis
Structural fabrication workshops

FAQ

Q: Can A572 Grade 42 replace ASTM A36?

A: For many structural applications, yes. Grade 42 offers higher yield strength while maintaining good weldability.

Q: Do you provide custom cutting?

A: Yes. Flame cutting, laser cutting, drilling, edge milling, and CNC machining can be provided according to drawings.

Q: What is the normal delivery time?

A: Stock plates are generally available within 7–15 days, while customized specifications usually require 20–35 days depending on processing requirements.