Inquiry Now

S460Q High-strength Steel Plate

Q: What are the weldability characteristics of high-strength low-alloy steel plates?

High-strength low-alloy steel plates offer excellent weldability. As their carbon content is typically low (below 0.2%), they present a lower risk of cracking during welding compared to standard high-strength steel plates and generally do not require complex preheating treatments.

Q: Why are high-strength low-alloy steels the preferred choice in construction and automotive manufacturing?

The key advantage of high-strength low-alloy steels is weight reduction. As they offer greater strength, thinner sheets can be used to withstand the same loads, thereby reducing the overall weight of the structure; in the automotive sector, this leads to improved fuel efficiency.

Q: What is high-strength low-alloy steel (HSLA)?

High-strength low-alloy steel (HSLA) is a type of steel in which small amounts of alloying elements (such as niobium, vanadium, titanium or copper) are added to enhance its mechanical properties. Compared to traditional carbon steel, it offers higher yield strength and better corrosion resistance whilst maintaining good weldability and formability.

Home-Products-High-Strength Low-Alloy Steel Plate-EN 10025-6

info@yx-steel.com 8615837212056 Get a Quote

S460Q High-strength Structural Steel Plate is suitable for engineering applications requiring both high strength and excellent low-temperature toughness.

Standard :
EN 10025-6
Grade :
S460Q
Thickness :
3 - 100 mm
Width :
1500 - 2500 mm
Length :
3000-12000 mm

Special thickness, width, and length can be negotiated separately.
We also provide customized processing services.If you have any questions, please contact us.

Overview

EN 10025-6 S460Q High-strength Structural Steel Plate features high yield strength (yield strength ≥ 460 MPa) and excellent low-temperature impact toughness (impact energy tested at -20°C ≥ 30 J). It is primarily used in load-bearing structures such as large engineering machinery, heavy steel structures, special equipment, and heavy-duty vehicles.

Specifications for exported EN 10025-6 S460Q High-strength Steel Plate:Thickness: 3 - 100 mm, Width: 1500 - 2500 mm, Length: 3000 - 12000 mm.

Other specifications can be customized for cutting.

Grade	S460Q
Standard	EN 10025-6: Hot-rolled structural steels - Part 6: Technical delivery conditions for flat products of high yield strength structural steels in the quenched and tempered condition
Classification	Hot-rolled Structural Steel
Delivery Conditions	Quenched and Tempered(Q&T)
Approval By Third Party	ABS, DNV, GL, CCS, LR , RINA, KR, TUV, CE
Weldability	Good weldability, but strict process procedures (Pre-heating, Low Hydrogen Welding Materials, Post-Weld Heat Treatment, etc.) must still be followed during welding. The core risks are cold cracking (hydrogen-induced cracking) and toughness degradation in the heat-affected zone (HAZ).
Machinability	Cutting can be performed using carbide tools, laser, plasma, or flame cutting, but heat input must be controlled to avoid embrittlement in the heat-affected zone. It can undergo cold working such as bending and stamping, but with deformation controlled to prevent performance issues due to stress concentration.
Surface Quality	Default surface in hot-rolled condition. Additional treatments such as shot peening and painting can be required upon request.
Quality Control	Provide the original material certificate. Non-destructive testing (such as UT ultrasonic testing), Charpy V-notch impact test, and Z-direction property test (Grades Z15/Z25/Z35) can be added as required.

Chemical Composition

Grade	S460Q
Element	C	Si	Mn	P	S	Cr	Ni	Mo	Nb	V	Ti	Cu	B	N	Zr
Content (max, %)	0.200	0.800	1.700	0.025	0.015	1.500	2.000	0.700	0.060	0.120	0.050	0.050	0.005	0.015	0.150

* EN 10025-6 S460Q High-strength Steel Plate allows for minor variations in the chemical composition of certain elements depending on the thickness.

Carbon Equivalent of S460Q High-strength Steel Plate

Grade	Thickness (t) [mm]	CEV [max, %]
S460Q	t ≤ 30	0.47
	30 < t ≤ 50	0.48
	50 < t ≤ 150	0.50

* The carbon equivalent value varies depending on the thickness. The greater the thickness of the steel plate, the higher the upper limit of the allowable carbon equivalent value (CEV).

* Carbon equivalent (CEV) calculation formula (IIW): CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15

* Yuxin Steel has a comprehensive range of EN 10025-6 S460Q high-strength steel plates in stock. For details, please contact us for consultation.

Mechanical Properties

Grade	Thickness (t) [mm]	Yield Strength (ReH) [min, MPa]	Tensile Strength (Rm) [MPa]	Elongation (A) [min, %]	Impact Energy (KV) [min]
S460Q	3 ≤ t ≤ 50	460	550 - 720	17	30J (at -20°C, Longitudinal)
	50 < t ≤ 100	440	550 - 720	17	30J (at -20°C, Longitudinal)
	100 < t ≤ 150	400	500 - 670	17	30J (at -20°C, Longitudinal)

* The strength of S460Q High-strength Steel Plate slightly decreases as the thickness increases.

Applications

Due to the high yield strength and low-temperature toughness of S460Q High-strength steel plate, it is widely used in the following fields:

1. Heavy engineering machinery: Crane boom structures, excavator chassis, mining equipment frames.

2. Large steel structures: Bridge load-bearing components, beams and columns for high-rise buildings, industrial platforms.

3. Special equipment: Pressure vessels, wind turbine tower flanges, load-bearing structures for railway freight cars.

4. Transportation: Heavy-duty truck frames, key load-bearing components of port machinery.

Other Information

Comparison of Similar Grades

Grade	Yield Strength (ReH) [min, MPa]	Tensile Strength (Rm) [MPa]	Impact Energy (KV) [min]	Typical Application Scenarios
S460Q	460	550 - 720	30J (at -20°C)	Conventional engineering machinery, steel structure workshops
S460QL	460	550 - 720	30J (at -40°C)	Bridges in cold regions, pressure vessels
S460QL1	460	550 - 720	30J (at -60°C)	Arctic equipment, ultra-low temperature storage tanks

* The differences between S460Q, S460QL, and S460QL1 mainly lie in the impact temperature requirements.

International Standard Equivalent Materials

Grade	Standard	Yield Strength (MPa)	Impact Temperature (°C)	Delivery Condition	Equivalence Evaluation
S460Q	EN 10025-6	460	-20	Quenched & Tempered	Reference Grade
Q460D	GB/T 1591 (China)	460	-20	Quenched & Tempered	Fully equivalent, preferred in Chinese market

* Grade equivalences are only approximate, actual mechanical properties and chemical composition should be compared.

FAQ

Q1:

What are the weldability characteristics of high-strength low-alloy steel plates?

High-strength low-alloy steel plates offer excellent weldability. As their carbon content is typically low (below 0.2%), they present a lower risk of cracking during welding compared to standard high-strength steel plates and generally do not require complex preheating treatments.

Q2:

Why are high-strength low-alloy steels the preferred choice in construction and automotive manufacturing?

The key advantage of high-strength low-alloy steels is weight reduction. As they offer greater strength, thinner sheets can be used to withstand the same loads, thereby reducing the overall weight of the structure; in the automotive sector, this leads to improved fuel efficiency.

Q3:

What is high-strength low-alloy steel (HSLA)?

High-strength low-alloy steel (HSLA) is a type of steel in which small amounts of alloying elements (such as niobium, vanadium, titanium or copper) are added to enhance its mechanical properties. Compared to traditional carbon steel, it offers higher yield strength and better corrosion resistance whilst maintaining good weldability and formability.