Q460 carbon steel plate is a high-strength low-alloy structural steel, mainly composed of iron, carbon, manganese, and a small amount of microalloying elements such as niobium, vanadium, titanium, etc. It is a hot-rolled structural steel for engineering.

Production Process

product-574-335

Element Content

Element	Content (≤ %)
Carbon (C)	0.20%
Silicon (Si)	0.50%
Manganese (Mn)	1.60%
Phosphorus (P)	0.035%
Sulfur (S)	0.035%
Micro-alloys (Nb, V, Ti)	Trace amounts

Q460 corresponding foreign standards and grades

Region/Organization	Standard	Grade
USA (ASTM)	ASTM A572M	Gr. 65
Europe (EN)	EN 10113 - 2 EN 10113 - 3	S460NL S460ML
Germany (DIN EN)	DIN EN 10113 - 2 DIN EN 10113 - 3	S460NL S460ML
Japan (JIS)	JIS G3106 JIS G3114	SM570 SMA570W SMA570P
France (NF EN)	NF EN 10113 - 2 NF EN 10113 - 3	S460NL S460ML
UK (BS EN)	BS EN 10113 - 2 BS EN 10113 - 3	S460NL S460ML
ISO	ISO 4950 - 2 ISO 4950 - 3	E460CC E460DD E460E

Key Features

High strength
Thanks to the introduction of microalloying elements such as Nb, V, and Ti, these elements form fine-dispersed carbide and nitride particles in the steel, significantly refining the grain structure and thus enhancing the yield capacity of the material. In addition, the application of controlled rolling and controlled cooling technology further improves the strength uniformity, making the tensile strength of the Q460 carbon steel plate stable between 550–720 MPa.

Excellent welding performance
The Q460 steel plate reduces the hardening tendency of the heat-affected zone of welding through low-carbon (generally ≤0.20%) design, while optimizing the proportion of manganese, silicon, and microalloying elements, making the weld zone dense and reducing crack sensitivity. Good welding quality can be achieved without complex post-heat treatment under a normal welding process.

Excellent low-temperature toughness
The impact value of the Q460 carbon steel plate is ≥27J under -20°C to -40°C, which meets the requirements of low-temperature construction and use in cold areas, and prevents brittle fracture.

Good processing performance
The moderate yield ratio and good elongation (A≥17%) of the Q460 carbon steel plate make it stable in cutting, stamping, bending, rolling, and other processes, and it is not easy to crack or form errors, which makes it suitable for manufacturing complex components. Its uniform organizational structure and mechanical properties are conducive to batch-automated processing and improve production efficiency.

Q460 Carbon Steel Plate Processing

Process	Method	Key Parameters & Notes
Cutting	Plasma / Oxyfuel Cutting	- Minimize heat-affected zones (HAZ) to preserve material properties.
Welding	Low-Hydrogen Electrodes (e.g., E7018)	- Preheat: 100–150°C (for thick plates). - Interpass Temp.Control below 250°C to avoid cracking.
Bending	Cold/Hot Bending	- Minimum Bend Radius: 3× plate thickness. - Avoid over-bending to prevent surface cracks.

Why Choose Q460?

Higher Strength-to-Weight Ratio vs. Q345 (reduces material usage).
Better Fatigue Resistance for dynamic loads.
Compliance with GB, EN, and ASTM standards.

Packaging of Q460 Carbon Steel Plate

FAQ

Q: What is Q460 steel?

A: Q460 is a high-strength, low-alloy (HSLA) structural steel with a minimum yield strength of 460 MPa, widely used in heavy-load construction and machinery.

Q: Can Q460 replace Q345 without design changes?
A: No – Higher strength may require recalculation of joint/weld designs.

Q: Is Q460 corrosion-resistant?
A: No, but galvanizing/painting can enhance protection.