EN 10025 is a European standard that specifies the technical delivery conditions for hot-rolled products of structural steels. It is divided into six parts, each focusing on different types of structural steels with varying properties such as yield strength, toughness, and corrosion resistance. The standard ensures uniformity in quality and performance across Europe, facilitating trade and engineering applications. EN 10025 steels are widely used in construction, bridges, offshore structures, and machinery due to their weldability, formability, and strength. Below, we detail the grades under each part of EN 10025, based on the standard's specifications.
EN 10025-1: General Technical Delivery Conditions
EN 10025-1 provides the general requirements for all subsequent parts, including inspection, testing, and delivery conditions. It does not define specific grades but sets the framework for the steel types in parts 2 to 6. No distinct grades are listed here, as it serves as an introductory standard.
EN 10025-2: Non-Alloy Structural Steels
EN 10025-2 covers hot-rolled non-alloy structural steels for general applications, with grades categorized by minimum yield strength and impact toughness. These steels are suitable for welded, bolted, and riveted structures. The table below lists the main grades:
|
Grade |
Yield Strength (min, MPa) |
Tensile Strength (MPa) |
Impact Toughness (J at °C) |
Notes |
|---|---|---|---|---|
|
S185 |
185 |
290–510 |
Not specified |
Basic structural steel for low-strength applications. |
|
S235JR |
235 |
360–510 |
27 J at +20°C |
Common for general construction; good weldability. |
|
S235J0 |
235 |
360–510 |
27 J at 0°C |
Better for moderate cold conditions than JR. |
|
S235J2 |
235 |
360–510 |
27 J at -20°C |
Suitable for low-temperature environments. |
|
S275JR |
275 |
410–560 |
27 J at +20°C |
Higher strength than S235; used in buildings. |
|
S275J0 |
275 |
410–560 |
27 J at 0°C |
Moderate cold resistance; for machinery frames. |
|
S275J2 |
275 |
410–560 |
27 J at -20°C |
Low-temperature applications like offshore. |
|
S355JR |
355 |
470–630 |
27 J at +20°C |
High strength for bridges and high-rise. |
|
S355J0 |
355 |
470–630 |
27 J at 0°C |
Good for moderate cold; heavy equipment. |
|
S355J2 |
355 |
470–630 |
27 J at -20°C |
Excellent for cold climates; offshore platforms. |
|
S355K2 |
355 |
470–630 |
40 J at -20°C |
Enhanced toughness; for demanding structures. |
These grades are designated with "S" for structural steel, followed by the yield strength and toughness indicator (JR, J0, J2, K2). Gangsteel offers all EN 10025-2 grades, including EN 10025-2 S355JR steel and EN 10025-2 S355J2 steel.
EN 10025-3: Normalized/Normalized Rolled Weldable Fine Grain Structural Steels
EN 10025-3 focuses on fine grain steels with improved weldability and toughness, suitable for normalized delivery conditions. These grades are used in applications requiring high impact resistance, such as cranes and pressure vessels. The table below lists the main grades:
|
Grade |
Yield Strength (min, MPa) |
Tensile Strength (MPa) |
Impact Toughness (J at °C) |
Notes |
|---|---|---|---|---|
|
S275N |
275 |
370–510 |
40 J at -20°C |
Fine grain for improved toughness; general use. |
|
S275NL |
275 |
370–510 |
27 J at -50°C |
Low-temperature variant for cold environments. |
|
S355N |
355 |
470–630 |
40 J at -20°C |
High strength; for bridges and machinery. |
|
S355NL |
355 |
470–630 |
27 J at -50°C |
Enhanced low-temperature toughness; offshore. |
|
S420N |
420 |
520–680 |
40 J at -20°C |
For heavy-load structures like cranes. |
|
S420NL |
420 |
520–680 |
27 J at -50°C |
Low-temperature high-strength applications. |
|
S460N |
460 |
550–720 |
40 J at -20°C |
Highest strength for demanding engineering. |
|
S460NL |
460 |
550–720 |
27 J at -50°C |
For arctic or extreme cold conditions. |
The "N" denotes normalized, and "L" indicates low-temperature impact testing. These grades are ideal for welded structures requiring fine grain for better toughness.
EN 10025-4: Thermomechanical Rolled Weldable Fine Grain Structural Steels
EN 10025-4 covers thermomechanical rolled (TM) steels with fine grain structure for improved strength and toughness. These grades are used in high-performance applications like offshore platforms and wind turbines. The table below lists the main grades:
|
Grade |
Yield Strength (min, MPa) |
Tensile Strength (MPa) |
Impact Toughness (J at °C) |
Notes |
|---|---|---|---|---|
|
S275M |
275 |
360–510 |
40 J at -20°C |
TM rolled for enhanced toughness; general use. |
|
S275ML |
275 |
360–510 |
27 J at -50°C |
Low-temperature variant for cold environments. |
|
S355M |
355 |
450–610 |
40 J at -20°C |
High strength; for bridges and machinery. |
|
S355ML |
355 |
450–610 |
27 J at -50°C |
Enhanced low-temperature toughness; offshore. |
|
S420M |
420 |
500–660 |
40 J at -20°C |
For heavy-load structures like cranes. |
|
S420ML |
420 |
500–660 |
27 J at -50°C |
Low-temperature high-strength applications. |
|
S460M |
460 |
530–720 |
40 J at -20°C |
Highest strength for demanding engineering. |
|
S460ML |
460 |
530–720 |
27 J at -50°C |
For arctic or extreme cold conditions. |
The "M" denotes thermomechanical rolling, and "L" indicates low-temperature impact testing. These grades provide better strength than normalized steels due to the TM process.
EN 10025-5: Structural Steels with Improved Atmospheric Corrosion Resistance
EN 10025-5 covers weathering steels with improved corrosion resistance, often used unpainted in outdoor structures. These grades form a protective patina in atmospheric exposure. The table below lists the main grades:
|
Grade |
Yield Strength (min, MPa) |
Tensile Strength (MPa) |
Impact Toughness (J at °C) |
Notes |
|---|---|---|---|---|
|
S235J0W |
235 |
360–510 |
27 J at 0°C |
Weathering steel for moderate corrosion. |
|
S235J2W |
235 |
360–510 |
27 J at -20°C |
Low-temperature weathering for cold climates. |
|
S355J0W |
355 |
490–630 |
27 J at 0°C |
High-strength weathering for bridges. |
|
S355J2W |
355 |
490–630 |
27 J at -20°C |
Enhanced low-temperature weathering; offshore. |
|
S355J0WP |
355 |
490–630 |
27 J at 0°C |
Phosphorus-enhanced for superior corrosion resistance. |
|
S355J2WP |
355 |
490–630 |
27 J at -20°C |
Low-temperature phosphorus weathering steel. |
|
S355K2W |
355 |
490–630 |
40 J at -20°C |
Highest toughness for extreme corrosion environments. |
The "W" denotes weathering, and "P" indicates higher phosphorus for corrosion resistance. These grades are ideal for exposed structures like bridges and towers.
EN 10025-6: Flat Products of High Yield Strength Structural Steels in Quenched and Tempered Condition
EN 10025-6 covers high-strength steels with yield strengths up to 960 MPa, quenched and tempered for maximum performance. These grades are used in high-stress applications like cranes and mobile equipment. The table below lists the main grades:
|
Grade |
Yield Strength (min, MPa) |
Tensile Strength (MPa) |
Impact Toughness (J at °C) |
Notes |
|---|---|---|---|---|
|
S460Q |
460 |
550–720 |
30 J at -20°C |
Quenched and tempered for high strength. |
|
S460QL |
460 |
550–720 |
30 J at -40°C |
Low-temperature high-strength variant. |
|
S460QL1 |
460 |
550–720 |
30 J at -60°C |
For extreme cold high-strength applications. |
|
S500Q |
500 |
590–770 |
30 J at -20°C |
Higher strength for heavy equipment. |
|
S500QL |
500 |
590–770 |
30 J at -40°C |
Low-temperature variant. |
|
S500QL1 |
500 |
590–770 |
30 J at -60°C |
Extreme cold variant. |
|
S550Q |
550 |
640–820 |
30 J at -20°C |
For cranes and mobile equipment. |
|
S550QL |
550 |
640–820 |
30 J at -40°C |
Low-temperature. |
|
S550QL1 |
550 |
640–820 |
30 J at -60°C |
Extreme cold. |
|
S620Q |
620 |
700–890 |
30 J at -20°C |
High-strength for load-bearing. |
|
S620QL |
620 |
700–890 |
30 J at -40°C |
Low-temperature. |
|
S620QL1 |
620 |
700–890 |
30 J at -60°C |
Extreme cold. |
|
S690Q |
690 |
770–940 |
30 J at -20°C |
For high-stress structures. |
|
S690QL |
690 |
770–940 |
30 J at -40°C |
Low-temperature. |
|
S690QL1 |
690 |
770–940 |
30 J at -60°C |
Extreme cold. |
|
S890Q |
890 |
940–1100 |
30 J at -20°C |
Ultra-high strength for specialized use. |
|
S890QL |
890 |
940–1100 |
30 J at -40°C |
Low-temperature. |
|
S890QL1 |
890 |
940–1100 |
30 J at -60°C |
Extreme cold. |
|
S960Q |
960 |
980–1150 |
30 J at -20°C |
Highest strength for demanding engineering. |
|
S960QL |
960 |
980–1150 |
30 J at -40°C |
Low-temperature. |
The "Q" denotes quenched and tempered, and "L/L1" indicate low-temperature impact testing. These grades are ideal for high-performance structures requiring reduced weight.
Gangsteel supplies all EN 10025 grades, including EN 10025-2 S355K2 steel and EN 10025-2 S355JR+N, with customization options. For more details, contact Gangsteel for technical support or quotes
.
Gangsteel Solution
Gangsteel details the grades of EN 10025 steel across its six parts, listing key grades with their yield strengths, tensile properties, and applications. It covers non-alloy, fine grain, weathering, and high-strength steels for construction and engineering.
Keywords: EN 10025 steel grades, EN 10025-2 S235JR, EN 10025-3 S355N, EN 10025-6 S690Q
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