S890QL High-Strength Quenched & Tempered Structural Steel Plate & ERW Pipe
S890QL High-Strength Quenched & Tempered Structural Steel Plate & ERW Pipe | EN 10025-6 Datasheet
Comprehensive material datasheet for S890QL steel according to EN 10025-6, including chemical composition, mechanical properties, thermal and electrical properties, equivalent standards, and application guide for ERW pipe and structural components.
Hot rolling, cold forming, welding, machining, ERW pipe manufacturing
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S890QL High-Strength Quenched & Tempered Structural Steel Plate & ERW Pipe Introduction
S890QL is a high-strength structural steel with a minimum yield strength of 890MPa, supplied in the quenched and tempered condition according to EN 10025-6. It offers excellent toughness down to -40°C, making it suitable for demanding welded structures in heavy engineering, cranes, offshore platforms, and pressure vessels. The 'Q' denotes quenched and tempered, and 'L' indicates low-temperature impact testing at -40°C. Available in plate, strip, and ERW pipe forms, S890QL combines high strength with good weldability and formability.
S890QL High-Strength Quenched & Tempered Structural Steel Plate & ERW Pipe Chemical Composition
The chemical composition of S890QL is precisely controlled to achieve high strength and excellent toughness after quenching and tempering. Low carbon equivalent ensures good weldability. Microalloying elements such as niobium, vanadium, and titanium contribute to grain refinement and precipitation strengthening.
| Chemical Element | Standard Value (wt. %) | Remarks |
|---|---|---|
| Carbon (C) | ≤ 0.20 | Ladle analysis |
| Silicon (Si) | ≤ 0.80 | |
| Manganese (Mn) | ≤ 1.70 | |
| Phosphorus (P) | ≤ 0.020 | |
| Sulfur (S) | ≤ 0.010 | |
| Chromium (Cr) | ≤ 1.50 | |
| Nickel (Ni) | ≤ 2.0 | |
| Molybdenum (Mo) | ≤ 0.70 | |
| Copper (Cu) | ≤ 0.50 | |
| Aluminium (Altotal) | ≥ 0.015 | Fine grain practice |
| Titanium (Ti) | ≤ 0.05 | |
| Vanadium (V) | ≤ 0.12 | |
| Niobium (Nb) | ≤ 0.06 | |
| Boron (B) | ≤ 0.005 | |
| Nitrogen (N) | ≤ 0.015 | |
| Zirconium (Zr) | ≤ 0.15 | Optional grain refiner |
| Carbon Equivalent Value (CEV) | ≤ 0.65 | Typical for ≤ 50mm thickness, CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15 |
S890QL High-Strength Quenched & Tempered Structural Steel Plate & ERW Pipe Thermal and Electrical Physical Properties
Typical physical properties for S890QL quenched and tempered steel. These values may vary slightly depending on exact composition and heat treatment. Values are for room temperature unless otherwise noted.
| Property | Standard Requirement | Unit | Test Condition |
|---|---|---|---|
| Density (ρ) | 7850 | kg/m³ | At 20°C |
| Elastic modulus (E) | 210 | GPa | At 20°C |
| Shear modulus (G) | 81 | GPa | Approx. E/(2(1+ν)) |
| Poisson's ratio (ν) | 0.3 | – | At 20°C |
| Thermal expansion coefficient (α) | 11.1 | 10⁻⁶/K | 20 – 100°C |
| Thermal expansion coefficient (α) | 11.9 | 10⁻⁶/K | 20 – 200°C |
| Thermal expansion coefficient (α) | 13.2 | 10⁻⁶/K | 20 – 400°C |
| Thermal conductivity (λ) | 35 | W/(m·K) | At 20°C |
| Specific heat capacity (c) | 460 | J/(kg·K) | At 20°C |
| Electrical resistivity (ρₑ) | 0.22 | µΩ·m | At 20°C |
S890QL High-Strength Quenched & Tempered Structural Steel Plate & ERW Pipe Mechanical Properties
Minimum mechanical properties of S890QL according to EN 10025-6 for quenched and tempered flat products. Values depend on thickness and orientation. Impact energy tested on Charpy V-notch specimens at -40°C.
| Property | Standard Requirement | Unit | Test Condition / Remarks |
|---|---|---|---|
| Yield strength (ReH) – longitudinal | ≥ 890 | MPa | Thickness ≤ 50 mm |
| Yield strength (ReH) – longitudinal | ≥ 860 | MPa | Thickness > 50 ≤ 100 mm |
| Yield strength (ReH) – transverse | ≥ 870 | MPa | Thickness ≤ 50 mm; transverse value typically 20 MPa lower than longitudinal |
| Tensile strength (Rm) – longitudinal | 940 – 1100 | MPa | Thickness ≤ 50 mm |
| Tensile strength (Rm) – longitudinal | 880 – 1100 | MPa | Thickness > 50 ≤ 100 mm |
| Elongation after fracture (A) – longitudinal | ≥ 12 | % | Gauge length L0 = 5.65√S0; thickness ≤ 100 mm |
| Impact energy (KV) at -40°C – longitudinal | ≥ 30 | J | Charpy V-notch, 10×10 mm specimen, thickness ≥ 10 mm |
| Impact energy (KV) at -40°C – transverse | ≥ 27 | J | Charpy V-notch, 10×10 mm specimen, thickness ≥ 10 mm |
S890QL High-Strength Quenched & Tempered Structural Steel Plate & ERW Pipe Complete Equivalent Material Standards and Replaceable Grade Recommendations
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Europe | EN 10025-6 | S890QL | Base standard; quenched and tempered |
| International | ISO 4950-2 | S890QL | Identical technical content |
| Germany | DIN EN 10025-6 | S890QL | Adopted European standard |
| United Kingdom | BS EN 10025-6 | S890QL | Adopted European standard |
| France | NF EN 10025-6 | S890QL | Adopted European standard |
| Italy | UNI EN 10025-6 | S890QL | Adopted European standard |
S890QL High-Strength Quenched & Tempered Structural Steel Plate & ERW Pipe Application Introduction
S890QL is used in heavy welded structures where high strength, excellent low‑temperature toughness, and good weldability are required. ERW pipes in this grade are commonly applied in structural columns, offshore risers, and high‑pressure pipelines. Processing demands precise welding procedures and possible post‑weld heat treatment to maintain mechanical integrity.
Product Applications: Crane booms and lattice masts, Jack‑up rig legs and offshore platform components, Wind turbine tower sections and foundation structures, Heavy‑lift mobile crane frames, Structural ERW pipes (columns, bracings, high‑pressure line pipe), Pressure vessels and penstocks
Processed into products: Thick‑walled ERW pipe joints and stiffened shells, Welded box beams and hollow sections, Mobile crane outriggers and chassis beams, Excavator booms and buckets, Heavy‑duty hydraulic cylinder rods, Shafts and axles for mining trucks
Application industries: Heavy engineering and construction, Offshore oil and gas, Mining and earthmoving equipment, Shipbuilding and marine structures, Crane and lifting equipment, Structural steel fabrication, ERW pipe manufacturing for structural and pressure applications
S890QL High-Strength Quenched & Tempered Structural Steel Plate & ERW Pipe Similar or Substitute Material Recommendations
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Europe | EN 10025-6 | S890Q | Same strength, impact test at -20°C instead of -40°C; suitable for less severe low‑temperature applications |
| Europe | EN 10025-6 | S960QL | Higher yield strength (≥960 MPa); lower ductility; use where lighter weight is critical |
| USA | ASTM A514/A517 | Grade S | Yield strength ~690 MPa; high‑strength quenched & tempered steel for structural plates; lower strength than S890QL |
| Sweden / International | Trademark (SSAB) | Weldox 900 / Strenx 900 | Proprietary grade; comparable minimum yield strength 890 MPa; often sold as plate or tube |
| Germany / International | Trademark (Dillinger) | DILLIMAX 890 | Proprietary grade; high‑strength fine‑grained structural steel with minimum yield strength 890 MPa |
Notes:
ERW pipe manufacture requires appropriate welding procedures; low‑hydrogen consumables and preheat may be necessary depending on thickness. Post‑weld heat treatment (PWHT) is often applied to restore toughness. The CEV limit of 0.65 ensures good weldability, but heat input control is critical to avoid softening in the HAZ. Always refer to the latest edition of EN 10025‑6 and the manufacturer's specific datasheet for guaranteed properties.
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