S890Q / 1.8940 - SteelNumber - Chemical composition,Mechanical Properties and applications

S890Q (1.8940) is a high-yield strength, fine-grain structural steel, quenched and tempered for high load applications, offering 890 MPa minimum yield strength, excellent weldability, and good toughness at low temperatures (around -20°C), used in cranes, bridges, mining, and transport for lean, strong structures. Its chemical composition includes controlled Carbon, Silicon, Manganese, Phosphorus, Sulfur, Boron, Chromium, Copper, Molybdenum, Nickel, Niobium, and Vanadium, ensuring strength and formability.

Standard and Designation

European Standard: EN 10025-6

Steel Grade: S890Q

Steel Number: 1.8940

Heat Treatment: Quenched and Tempered (Q)

Minimum Yield Strength: 890 MPa

The "Q" suffix indicates delivery in the quenched and tempered condition, ensuring high strength combined with controlled toughness.

Ultra-high yield strength (≥ 890 MPa)

Excellent strength-to-weight ratio → lighter structures

Good low-temperature toughness

Controlled weldability for a Q&T steel

High fatigue resistance under cyclic loading

Compared with conventional structural steels (S355, S460), S890Q enables 30–50% weight reduction in load-bearing structures.

S890Q is widely used in highly demanding structural applications, including:

Heavy machinery & lifting equipment

Mobile cranes and crawler cranes

Crane booms and jib arms

Heavy lifting frames

Construction & infrastructure

High-load bridges and truss components

Offshore platforms and modules

Wind turbine towers (critical sections)

Transport & mobility

Heavy-duty truck chassis

Mining and construction equipment frames

Special trailers with high payload requirements

Energy & industrial equipment

Pressure-loaded support structures

Large mechanical components requiring compact design

If your project demands:

• Maximum strength with minimal weight
• High safety margins under dynamic loads
• Long-term structural reliability

Then S890Q / 1.8940 high-strength steel plate is one of the most advanced structural materials available under EN standards.

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Q1: What material is S890Q steel plate? What standard does it comply with?

A: S890Q is a European standard quenched and tempered high-strength structural steel, mainly complying with the European standard EN10025-6, corresponding to the Chinese standard Q890 quenched and tempered high-strength steel. In the grade, "S" stands for structural steel, "Q" for delivery condition, and "890" indicates that its minimum yield strength can reach 890MPa. It is produced through the quenching + tempering process, featuring both high strength and good toughness.

Q2: What are the core differences between S890Q steel plate and ordinary steel plate?

A: The core differences lie in strength grade and production process. The yield strength of S890Q (≥890MPa) is much higher than that of ordinary structural steel. Moreover, after quenching and tempering treatment, it has excellent plasticity, impact toughness and corrosion resistance while maintaining high strength, which can withstand heavy loads and complex stress environments, suitable for high-demand scenarios; ordinary steel plates are mostly produced by hot rolling process with low strength and limited application scenarios.

Q3: What are the typical application scenarios of S890Q steel plate?

A: It is mainly used in scenarios bearing extreme loads, including: ① Construction machinery (cranes, excavators, coal mine hydraulic supports, etc.); ② Large-scale structures (long-span bridges, load-bearing structures of high-rise buildings); ③ Special equipment (mining trucks, armored vehicles); ④ Marine engineering (offshore drilling platforms, wind power supports), etc.

Q4: What are the key mechanical performance parameters of S890Q steel plate?

A: The core mechanical properties vary slightly with thickness: ① Thickness 3-50mm: Yield strength ≥890MPa, tensile strength 940-1100MPa, elongation ≥11%, impact energy at 0℃ ≥40J, impact energy at -20℃ ≥30J; ② Thickness 50-100mm: Yield strength ≥830MPa, tensile strength 880-1100MPa, other properties are consistent with thin specifications.

Q5: What are the requirements for the chemical composition of S890Q steel plate?

A: Maximum content of key elements (%): C≤0.20, Si≤0.80, Mn≤1.70, P≤0.025, S≤0.015. It also contains alloying elements such as Cr, Mo, Ni, V (maximum content: 1.50, 0.70, 2.00, 0.12 respectively). For details, refer to the manufacturer's material certificate.

Q6: What are the conventional specifications of S890Q steel plate? Is customization available?

A: Conventional specifications: Thickness 3-120mm, width 1000-4020mm, length 6000-17500mm; most manufacturers support customization. Steel plates with special thickness, width and length can be customized according to requirements, and some can also provide pre-cutting services.

Q7: Are there requirements for the thickness tolerance and surface quality of S890Q steel plate?

A: The thickness tolerance complies with EN10029 Class A standard, and the length/width tolerance complies with EN10029 standard; the surface quality is implemented in accordance with EN10163 Class A, and the flatness meets EN10029 Class N requirements to ensure subsequent processing accuracy.

Q8: What is the approximate market price of S890Q steel plate? What factors affect it?

A: Reference price range: 499-599 USD/ton (subject to real-time quotation). The price is affected by multiple factors: ① Specifications (thickness, width, length); ② Purchase quantity (lower price for bulk purchase); ③ Processing needs (additional processing such as cutting and flaw detection will increase the price); ④ Fluctuations in market raw material prices, delivery time requirements, etc.

Q9: What is the Minimum Order Quantity (MOQ) for purchasing S890Q steel plate?

A: The conventional minimum order quantity is 20 tons; if there is stock, some manufacturers can accept small-batch purchases (subject to confirmation with suppliers); for large-batch purchases (such as more than 50 tons), better prices and payment terms can usually be negotiated.

Q10: What is the delivery time of S890Q steel plate? Is stock available?

A: Delivery time for stock orders is 5-7 working days; for customized specifications or out-of-stock situations, the delivery time is 10-15 working days, which is specifically subject to the manufacturer's production schedule; urgent orders can be negotiated with suppliers for priority production.

Q11: What payment methods and delivery terms are supported for procurement?

A: ① Payment methods: Common ones include T/T (30% advance payment + 70% final payment, photos of goods can be provided for confirmation before the final payment), L/C, Western Union, Alipay, etc.; ② Delivery terms: EXW, FOB, CFR, CIF, etc. are supported, and appropriate terms can be selected according to the procurement location.

Q12: Can I get free samples of S890Q steel plate?

A: Most manufacturers support providing free samples, but the express/logistics cost of samples shall be borne by the buyer; the sample size is usually a regular small piece (such as 100*100mm), and samples of special sizes can be negotiated.