S890Q Steel in Crane Boom Structures

S890Q is a high-strength quenched and tempered structural steel under European Standard (EN 10025-6), specifically designed to withstand extreme loads:

• Yield Strength: ≥890MPa (thickness ≤50mm), ≥830MPa (50-100mm)
• Tensile Strength: 940-1100MPa
• Elongation: ≥10%
• Impact Toughness: ≥30J/-20°C
• Delivery Condition: Quenched and tempered (Q)
• Material Number: 1.8940

Grade Meaning:

S: Structural steel

890: Minimum yield strength of 890MPa

Q: Quenched and tempered (quenching + tempering)

① Significant Lightweighting

Reduce material usage by 20-30% under the same strength, cutting boom weight by 15-20%

Lightweight directly translates to higher lifting capacity and longer working radius

Reduced weight allows smaller hydraulic systems and counterweights, further lowering overall energy consumption

② Excellent Balance of Strength and Toughness

Yield strength reaches 890MPa, 2.6 times that of ordinary structural steel (S355)

Excellent fatigue resistance, suitable for cyclic load conditions of cranes

Maintain ≥30J impact toughness at -20°C low temperature, preventing brittle fracture

③ Structural Design Optimization

Allow more compact boom section and connection designs

Reduce boom sections, simplify structure and improve reliability

Facilitate the design of large-span, ultra-large-tonnage cranes

S890Q steel is mainly used in the high-stress critical parts of crane booms:

Domestic Equivalent Steels:

Q890D (impact ≥34J/-20°C), basically equivalent to S890Q

Q890E (impact ≥34J/-40°C), equivalent to S890QL

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If you want to learn more about GNEE's products, you can send an email to alloy@gneesteelgroup.com. We are more than happy to assist you.

Q1: What is S890Q steel plate?

A:S890Q is a high-strength structural steel plate according to EN 10025-6, supplied in quenched and tempered (Q) condition, with a minimum yield strength of 890 MPa.

Q2: What is the material number of S890Q?

A:The European material number for S890Q is 1.8940.

Q3: Is S890Q considered non-alloy steel?

A:Yes. Under EN classification, S890Q is listed as non-alloy structural steel, although small alloying elements are added for strength and toughness control.

Q4: What thickness range is available for S890Q steel plate?

A:Common supply thickness ranges from 6 mm to 150 mm, depending on mill capability and standard requirements.

Q5: What are the mechanical properties of S890Q?

A:

Yield strength: ≥ 890 MPa (≤ 50 mm)

Tensile strength: 940–1100 MPa

Elongation: ≥ 11%

Impact test: ≥ 30 J at −20°C

Q6: Can S890Q steel be welded easily?

A:Yes, S890Q has good weldability, but welding must follow controlled procedures, including proper heat input, preheating (if required), and suitable filler materials.

Q7: What is the difference between S890Q and S890QL?

A:S890QL offers better low-temperature impact toughness than S890Q and is typically specified for colder environments or critical structures.

Q8: What are typical applications of S890Q steel plate?

A:S890Q is widely used in:

Cranes and lifting equipment

Bridges and heavy structures

Mining and earthmoving machinery

Wind power and offshore structures

Heavy-duty vehicle frames

Q9: Can S890Q replace S690Q to reduce weight?

A:Yes. Using S890Q instead of S690Q allows significant weight reduction while maintaining or increasing load capacity, which is especially valuable for mobile equipment.

Q10: What inspection and certificates are required for S890Q?

A:Standard supply includes EN 10204 3.1 MTC.

3.2 certificates, ultrasonic testing (UT), and third-party inspection (SGS, BV, TUV) are available upon request.

Q11: Is S890Q suitable for pressure vessel applications?

A:No. S890Q is a structural steel, not designed for pressure vessel or boiler applications. Pressure vessel steels must comply with specific PV standards such as EN 10028 or ASME.

Q12: What delivery condition is required for S890Q steel plate?

A:S890Q must be supplied in quenched and tempered (Q) condition as per EN 10025-6.

Q13: Can you cut or machine S890Q steel plate?

A:Yes. Flame cutting, plasma cutting, and machining are possible with controlled parameters to maintain material properties.

Q14: Does S890Q steel require special storage or handling?

A:Standard dry storage is sufficient. Surface protection can be added for long-term outdoor storage.