S890Q is a quenched and tempered ultra-high strength structural steel complying with the European standard EN10025-6. Supplied in the quenched and tempered state, it has a minimum yield strength of 890MPa, combined with excellent plasticity, toughness and weldability. Corresponding to the national standard Q890 series, it is suitable for heavy-load and harsh working conditions.
Mechnical property
| Thickness (mm) | |||
| S890Q | ≥ 3 ≤ 50 | > 50 ≤ 100 | > 100 |
| Yield strength (≥Mpa) | 890 | 830 | 830 |
| Tensile strength (Mpa) | 940-1100 | 880-1100 | 880-1100 |
Chemical composition
| Main chemical elements composition of S890Q steel plate | |||||||
| C | Si | Mn | P | S | N | B | Cr |
| 0.20 | 0.80 | 1.70 | 0.025 | 0.015 | 0.015 | 0.005 | 1.50 |
| Cu | Mo | Nb | Ni | Ti | V | Zr | |
| 0.50 | 0.70 | 0.06 | 2.0 | 0.05 | 0.12 | 0.15 | |
Applications:
Construction Machinery:
Used to manufacture core components such as hydraulic supports, excavator arms and crane telescopic arms, adapting to heavy-load and impact scenarios.
Special Vehicles:
Applied in mining truck frames and armored vehicle base plates, balancing the requirements of strength and lightweight.
Large-Scale Infrastructure: Suitable for main girders of long-span bridges and supporting components of high-rise buildings, withstanding complex loads.
Energy Equipment:
Used to make wind turbine tower flanges, resisting high corrosion and strong wind load environments at sea.
Large-Scale Infrastructure:
Suitable for main girders of long-span bridges and supporting components of high-rise buildings, withstanding complex loads.
Energy Equipment:
Used to make wind turbine tower flanges, resisting high corrosion and strong wind load environments at sea.
Request a professional quotation for S890Q from GNEE Steel.
What is S890Q steel and what does its designation mean?
S890Q is a high-strength quenched and tempered structural steel defined in European standards (e.g., EN 10025-6). The "S" stands for structural steel, "890" indicates the minimum yield strength in MPa, and "Q" denotes quenched and tempered (QT) heat treatment.
What are the typical mechanical properties of S890Q?
S890Q typically has a minimum yield strength of 890 MPa, minimum tensile strength often in the range 960–1100 MPa, good toughness (often specified with Charpy V-notch values at low temperatures), and good weldability when proper procedures are followed.
What are common applications of S890Q steel?
S890Q is used in heavy-duty structures where high strength and weight reduction are critical, such as crane booms, mobile crane structures, high-rise building components, offshore structures, and heavy equipment frames.
What heat treatment is applied to S890Q?
S890Q is produced by quenching (rapid cooling) followed by tempering (reheating to a lower temperature and cooling), which achieves high strength while maintaining toughness and reducing brittleness.
What welding considerations are important for S890Q?
Key welding considerations include preheating and interpass temperature control to prevent hydrogen-induced cracking, using low-hydrogen welding consumables, controlling heat input, and performing post-weld heat treatment (PWHT) when required by design or code.
How does S890Q compare to S690Q in terms of strength and application?
S890Q has a higher minimum yield strength (890 MPa vs. 690 MPa for S690Q). This allows S890Q to achieve the same load-carrying capacity with thinner sections, making it preferred for more weight-sensitive or higher-load applications such as large crane booms, whereas S690Q is used in a broader range of heavy structures where extreme strength is not required.
How does S890Q compare to quenched-and-tempered carbon-manganese steels (e.g., A514/A517 in ASTM) in terms of standardization and properties?
S890Q is a European standard (EN) high-strength structural steel with specified yield strength and toughness requirements, often with tighter controls on chemistry and heat treatment for structural applications. ASTM A514/A517 are also QT high-strength steels but follow American standards; their grade designations, strength levels, and toughness/testing requirements may differ. Both are used for heavy structural applications, but material approval and procurement specifications depend on the project's standard framework (EN vs. ASTM).
How does S890Q compare to hot-rolled high-strength steels (e.g., S355) in terms of strength, toughness, and fabrication?
S890Q has significantly higher yield strength than S355 (890 MPa vs. 355 MPa), enabling weight reduction. It also typically offers better toughness at lower temperatures due to QT heat treatment. However, S890Q requires more careful fabrication: stricter welding procedures (preheat, low-hydrogen consumables), more controlled cutting and forming to avoid cracking, and often more detailed quality control compared to the more forgiving fabrication of S355.