EN 10025-6 S500QL steel plate is a high-strength quenched and tempered structural steel plate with excellent low-temperature toughness, good weldability, and cold formability.
Standard :
EN 10025-6Grade :
S550QLThickness :
3 - 100 mmWidth :
1500 - 2500 mmLength :
3000 - 12000 mmSpecial thickness, width, and length can be negotiated separately.
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EN 10025-6 S500QL is a high-strength quenched and tempered structural steel plate under the European Standard (EN) system. Its core characteristics include high strength and excellent low-temperature toughness, making it widely used for structural components in cold and heavy-duty environments. It is a common material in fields such as construction machinery, bridges, and marine engineering.
| Grade | S500QL |
|---|---|
| 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 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 is "As-Rolled" surface. Special requirements (such as coating pretreatment) must be specified in the order. |
| Quality Control | Provide the original material certificate. If required, additional nondestructive testing (such as UT ultrasonic testing), Charpy V-notch impact test, and Z-direction property test (Grades Z15/Z25/Z35) can be added. |
| Grade | S500QL | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Element | C | Si | Mn | P | S | N | B | Cr | Cu | Mo | Nb | Ni | Ti | V | Zr |
| Content (max, %) | 0.200 | 0.800 | 1.700 | 0.025 | 0.015 | 0.015 | 0.005 | 1.500 | 0.500 | 0.700 | 0.060 | 2.000 | 0.050 | 0.120 | 0.150 |
* The chemical composition of EN 10025-6 S500QL High Strength Steel Plate is adjusted within a certain range depending on the thickness.
Carbon Equivalent of S500QL High Strength Steel Plate
| Grade | Thickness (t) [mm] | CEV [max, %] |
|---|---|---|
| S500QL | t ≤ 30 | 0.47 |
| 30 < t ≤ 50 | 0.48 | |
| 50 < t ≤ 150 | 0.49 |
* 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 sufficient stock of EN 10025-6 S500QL high-strength steel plates. For detailed information, please contact us for inquiries.
| Grade | Thickness (t) [mm] | Yield Strength (ReH) [min, MPa] | Tensile Strength (Rm) [MPa] | Elongation (A) [min, %] | Impact Energy (KV) [min] |
|---|---|---|---|---|---|
| S500QL | 3 ≤ t ≤ 50 | 500 | 590 - 770 | 17 | 30J (at -40°C, Longitudinal) |
| 50 < t ≤ 100 | 480 | 590 - 770 | 17 | 30J (at -40°C, Longitudinal) | |
| 100 < t ≤ 150 | 440 | 540 - 720 | 17 | 30J (at -40°C, Longitudinal) |
* The strength of S500QL high-strength steel plate slightly decreases as the thickness increases.
The combination of "High Strength + Low-Temperature toughness" in EN 10025 S500QL high-strength steel plates makes them suitable for structural applications with high loads and harsh environments, primarily including:
1. Construction Machinery: Crane arm frames, excavator buckets/booms, loader chassis, etc. (requiring weight reduction and impact resistance);
2. Mining Machinery: Dump truck bodies, crusher frames (withstanding heavy loads and material impact);
3. Bridge and Building Steel Structures: Load-bearing components of long-span bridges in cold regions (e.g., Northern Europe, Northeast China), core columns of super high-rise steel structures (resisting low-temperature wind loads);
4. Marine Engineering: Offshore platform structural components, flange connections for offshore wind turbine towers (resisting low-temperature marine environments and corrosion fatigue, requiring anti-corrosion treatment);
5. Special Vehicles: Heavy-duty truck frames, tanker truck bodies (lightweight requirements + road impact resistance);
6. Pressure Vessels and Energy Storage Equipment: Support structures for high-pressure hydrogen storage tanks and cryogenic tanks (requiring high strength and low-temperature safety).
The Differences Between Grades Within The Same Series
| Grade | Yield Strength (ReH) [min, MPa] | Tensile Strength (Rm) [MPa] | Elongation (A) [min, %] | Impact Energy (KV) [min] |
|---|---|---|---|---|
| S500Q | 500 | 590 - 770 | 17% | 30J (at -20°C) |
| S500QL | 500 | 590 - 770 | 17% | 30J (at -40°C) |
| S500QL1 | 500 | 590 - 770 | 17% | 30J (at -60°C) |
* The differences between S500Q, S500QL, and S500QL1 mainly lie in the impact temperature requirements.
Equivalent Grades of EN 10025-6 S500QL High-strength Steel Plate
| Standard | Grade | Yield Strength (MPa) | Impact Temperature (°C) | Delivery Condition | Equivalence Evaluation |
|---|---|---|---|---|---|
| EN 10025-6 | S500QL | 500 | -40 | Quenched & Tempered | Reference Grade |
| GB/T 16270 (China) | Q500E | 500 | -40 | Quenched & Tempered | Fully equivalent, preferred in Chinese market |
* Grade equivalences are only approximate, actual mechanical properties and chemical composition should be compared.
A:
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.
A:
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.
A:
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.
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