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What are the grades of EN 10025 steel?

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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