Is S890QL carbon steel?

Is S890QL carbon steel?

Yes, S890QL is considered a low-carbon, high-strength structural steel (HSLA) that uses specific alloying elements and a quenched and tempered (Q) process to achieve its exceptional strength, making it suitable for demanding applications requiring lightweight yet robust components, notes Kanak Metal & Alloys, HENAN GANG IRON AND STEEL CO.,LTD and Conquest steel and Alloys. While it's a type of carbon steel, the "L" signifies good low-temperature toughness (at -40°C), and its low carbon content (below 0.2%) allows for good weldability

S890QL is an extra high-strength, quenched and tempered structural steel (EN 10025-6 standard) known for its exceptional yield strength of at least 890 MPa and toughness at low temperatures (down to -40°C). The "S" means structural steel, "890" is its yield strength in MPa, "Q" denotes quenching and tempering, and "L" signifies low-temperature impact toughness. These plates are manufactured in compliance with the EN 10025:6:2004 standard, ensuring a high-yield steel that is ideal for lightweight, robust designs.

The material is heat treated using quenching and tempering techniques to achieve its high strength and durability. These plates offer a good balance of toughness and weldability, displaying excellent welding and bending properties. This makes them a popular choice in sectors that demand strong, reliable materials that can still be efficiently fabricated in industrial environments.

The key benefit of S890QL Steel Plates is the exceptional strength-to-weight ratio, which enables a significant amount of weight to be saved in the structure, leading to reduced fabrication costs. This makes it indispensable for building bridges and sea-links dependable for load-bearing, bearing the weight of heavy trucks and cars. It is also widely used in demanding applications such as trailers, agricultural, mining, earth-moving equipment, and heavy lifting machinery.

Key Characteristics

High Strength: Minimum yield strength of 890 MPa, allowing for leaner, stronger structures.

Toughness: Excellent impact resistance, even in cold environments (tested at -40°C).

Heat Treatment: Delivered in a quenched and tempered (Q&T) condition for improved mechanical properties.

Weldability: Good weldability and machinability, simplifying fabrication.

Applications

Heavy Transport: Truck frames, rail cars, trailers.

Lifting & Construction: Crane booms, mobile cranes, aerial platforms, bridges, structural supports.

Machinery: Heavy machinery, mining equipment, and construction equipment.

Specialized Uses: Offshore engineering, security plates (anti-drill), and high-strength containers.

Is S890QL carbon steel?

Yes, S890QL is a type of high-strength low-alloy (HSLA) structural steel, often referred to as a carbon steel in general classifications, but more accurately a specific grade (EN 10025-6) with controlled alloying elements (like Cr, Ni, Mo) to achieve high yield strength (890 MPa) and good toughness after quenching and tempering (Q) at low temperatures (L, -40°C). While it contains carbon, its properties come from careful alloying and heat treatment, making it more advanced than basic carbon steel.

What is S890QL equivalent to? S890QL is a European high-strength structural steel (EN 10025-6) with a minimum yield strength of 890 MPa, often equivalent to German TStE890V, Chinese Q890, and various trade names like SSAB's Strenx® 900 E, DILLIMAX 890T, or Amstrong® Ultra 890QL, used where high strength, weldability, and toughness are needed, with counterparts in standards like ASTM A514 (though not a direct match).

What is the maximum allowable stress value for S890QL?

For S890QL steel, the minimum yield strength (ReH) is 890 MPa for thicknesses up to 50mm, decreasing to 830 MPa for thicknesses from 50mm to 100mm, and the tensile strength (Rm) is typically 940-1100 MPa, but the maximum allowable stress (S) depends heavily on the specific design code (e.g., Eurocode, ASME) and application, often calculated as a fraction (like 0.66 or 0.85) of the yield strength, so there isn't a single universal maximum value; it's a calculated design parameter.

Equivalent grades of steel S890QL (1.8983)

Chemical composition % of steel S890QL (1.8983): EN 10025-6-2004

Mechanical properties of steel S890QL (1.8983)

S890QL Steel Plate V Notch Impact Testing

1What is the composition of S890QL?

S890QL is a high-strength, quenched, and tempered structural steel (EN 10025-6) with a minimum yield strength of 890 MPa, characterized by controlled chemical composition, including low carbon (max 0.20%), manganese (max 1.70%), silicon (max 0.80%), and specific amounts of alloying elements like chromium, molybdenum, nickel, niobium, titanium, vanadium, and boron for enhanced strength, toughness, and weldability, designed for demanding applications requiring high load-bearing capacity and good impact resistance at low temperatures (down to -40°C).

2Is S890QL high speed steel?

S890QL isn't High-Speed Steel (HSS) for cutting tools, but rather an Extra High Strength, Quenched & Tempered Structural Steel (EN 10025-6 standard) known for its massive strength (890 MPa yield), toughness, excellent weldability, and suitability for heavy-duty construction, heavy machinery, cranes, and mining equipment where lighter, stronger designs are needed. The code breaks down as: S (Structural), 890 (890 MPa yield strength), Q (Quenched & Tempered), and L (Low-temperature notch toughness, -40°C).

3What are the typical application fields of S890QL ?

S890QL is a high-strength, quenched, and tempered structural steel used in demanding, load-bearing applications like heavy machinery (cranes, earthmoving), transport (truck frames, rail cars, trailers, vehicles), construction (bridges, high-rise buildings), and offshore/energy (oil & gas, wind turbines, offshore structures) due to its excellent strength-to-weight ratio, toughness, and weldability, allowing for lighter, stronger designs.

4What is the P number of S890QL ?

S890QL (Material No. 1.8983) is a high-strength quenched and tempered structural steel, but it doesn't have a standard P-Number (ASME grouping) assigned in common tables, as P-Numbers typically cover established pressure vessel steels (like P1-P91), while S890QL is a specific EN standard structural grade, often grouped under P-Group 1 (Carbon & Low Alloy Steels) or assigned to a specific P-Number like P36 or P37 in welding codes for similar high-strength Q&T steels, though confirmation with ASME Section IX or a supplier is best for welding procedures.

5What is the hardness of S890QL ?

S890QL is a high-strength structural steel with a minimum yield strength of 890 MPa, not a specific hardness number in Rockwell C, but its quenched and tempered (QL) condition gives it excellent hardness, toughness, and weldability for demanding applications like cranes, mining, and heavy equipment, with hardness typically measured for comparison rather than as a primary specification like yield strength.

6What is the maximum allowable stress value for S890QL ?

The maximum allowable stress for S890QL isn't a single number but depends on thickness and design code, typically derived from its minimum yield strength (890 MPa for thinner plates, 830 MPa for thicker) by applying safety factors, often around 0.85 or lower for tensile stress in structural design, meaning actual allowable tensile stress could be around 750-800 MPa (for thinner sections), but verify with specific code (like EN 1993) for precise design.

7What temperature is S890QL ?

S890QL is a high-strength structural steel known for its performance at low temperatures, specifically requiring a minimum impact energy of 30 Joules at -40°C (-40°F), making it suitable for very cold environments, though its working temperature range extends across various conditions, requiring preheating (150-250°C) during welding to prevent cracking.

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