DIN 17102 WStE500 High-Strength Weldable Fine Grain Structural Steel Coil
DIN 17102 WStE500 High-Strength Weldable Fine Grain Structural Steel Coil
Comprehensive technical data for DIN 17102 WStE500 hot rolled steel coil, including chemical composition, mechanical and physical properties, international equivalent grades, and application guidance.
Hot rolling; suitable for welding, cold forming (limited), bending, cutting, machining
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DIN 17102 WStE500 High-Strength Weldable Fine Grain Structural Steel Coil Introduction
DIN 17102 WStE500 is a weldable fine grain structural steel supplied as hot rolled strip and sheet. It offers a minimum yield strength of 500 MPa in thicknesses up to 16 mm and is designed for demanding welded structures with good toughness. The steel is produced via fine grain practice with microalloying elements (Nb, V, Ti) ensuring high strength and excellent weldability. Typical delivery conditions include normalized (+N) or thermomechanically rolled (+M). This material is widely used in crane building, bridge construction, vehicle manufacturing, and heavy steel structures where weight reduction and high load-bearing capacity are essential.
DIN 17102 WStE500 High-Strength Weldable Fine Grain Structural Steel Coil Chemical Composition
The chemical composition according to DIN 17102 for WStE500 is designed to achieve high strength through fine grain structure and microalloy additions. Limits are given for ladle analysis. Elements like Nb, V, and Ti are used for grain refinement and precipitation hardening. The steel is fully killed and has a guaranteed minimum aluminium content. Residual elements such as Cr, Ni, Mo, and Cu are not intentionally added but may be present up to specified maximums.
| Element | Specified Value (max unless range) | Remarks |
|---|---|---|
| Carbon (C) | ≤ 0.20 | |
| Silicon (Si) | ≤ 0.50 | |
| Manganese (Mn) | 1.00 – 1.70 | |
| Phosphorus (P) | ≤ 0.035 | |
| Sulfur (S) | ≤ 0.030 | |
| Aluminium (Al total) | ≥ 0.02 | Minimum soluble aluminium for grain refinement |
| Niobium (Nb) | ≤ 0.05 | Microalloying element |
| Vanadium (V) | ≤ 0.12 | Microalloying element |
| Titanium (Ti) | ≤ 0.05 | Microalloying element |
| Nitrogen (N) | ≤ 0.020 | |
| Chromium (Cr) | ≤ 0.30 | Residual element |
| Nickel (Ni) | ≤ 0.30 | Residual element |
| Molybdenum (Mo) | ≤ 0.10 | Residual element |
| Copper (Cu) | ≤ 0.20 | Residual element |
DIN 17102 WStE500 High-Strength Weldable Fine Grain Structural Steel Coil Thermal and Electrical Physical Properties
Physical properties are typical values for WStE500 fine grain structural steel at room temperature, unless indicated otherwise. These reference data are useful for heat transfer calculations, stress analysis, and electrical considerations. They are not part of the delivery specification but represent the behavior of this steel type.
| Property | Typical Value | Unit | Test Conditions |
|---|---|---|---|
| Density (ρ) | 7.85 | g/cm³ | 20 °C |
| Modulus of elasticity (E) | 210 | GPa | 20 °C |
| Shear modulus (G) | 81 | GPa | 20 °C |
| Poisson's ratio (ν) | 0.3 | – | 20 °C |
| Thermal expansion coefficient (α) | 12.0 | 10⁻⁶/K | 20 – 100 °C |
| Thermal expansion coefficient (α) | 12.5 | 10⁻⁶/K | 20 – 200 °C |
| Thermal expansion coefficient (α) | 13.0 | 10⁻⁶/K | 20 – 300 °C |
| Thermal conductivity (λ) | 50 | W/(m·K) | 20 °C |
| Specific heat capacity (cp) | 460 | J/(kg·K) | 20 °C |
| Electrical resistivity (ρe) | 0.25 | µΩ·m | 20 °C |
DIN 17102 WStE500 High-Strength Weldable Fine Grain Structural Steel Coil Mechanical Properties
Mechanical properties apply to hot rolled condition in the longitudinal direction at ambient temperature, unless specified otherwise. The values depend on product thickness and are specified in DIN 17102. Higher thicknesses show a slight reduction in strength. Impact energy is guaranteed for fine grain steels, often at -20°C for the WStE500 with low temperature toughness. Bending tests are performed with a mandrel diameter related to the sample thickness (a).
| Property | Specified Requirement | Unit | Test Conditions / Remarks |
|---|---|---|---|
| Yield strength (ReH) | Min 500 | MPa | Thickness ≤ 16 mm |
| Yield strength (ReH) | Min 480 | MPa | Thickness > 16 mm to ≤ 35 mm |
| Yield strength (ReH) | Min 460 | MPa | Thickness > 35 mm to ≤ 50 mm |
| Yield strength (ReH) | Min 440 | MPa | Thickness > 50 mm to ≤ 70 mm |
| Tensile strength (Rm) | 610 – 750 | MPa | Thickness ≤ 16 mm |
| Tensile strength (Rm) | 590 – 730 | MPa | Thickness > 16 mm to ≤ 35 mm |
| Tensile strength (Rm) | 570 – 710 | MPa | Thickness > 35 mm to ≤ 50 mm |
| Tensile strength (Rm) | 550 – 690 | MPa | Thickness > 50 mm to ≤ 70 mm |
| Elongation (A5) | Min 17 | % | Longitudinal, gauge length 5.65√So |
| Bend test (mandrel diameter) | 2 a | – | 180° bend, a = specimen thickness, for t ≤ 16 mm |
| Bend test (mandrel diameter) | 3 a | – | 180° bend, a = specimen thickness, for t > 16 mm to 35 mm |
| Impact energy (KV, Charpy-V) | Min 27 | J | Longitudinal, at -20 °C (for WStE500 with low temp. option) |
| Impact energy (KV, Charpy-V) | Min 27 | J | Transverse, at -20 °C, if agreed |
DIN 17102 WStE500 High-Strength Weldable Fine Grain Structural Steel Coil Fully Equivalent Grades and Substitute Recommendations
| Country/Region | Standard | Designation | Remarks |
|---|---|---|---|
| Europe | EN 10025-3 | S500N | Normalized fine grain structural steel; direct replacement for normalized condition |
| Europe | EN 10149-2 | S500MC | Thermomechanically rolled, high yield strength for cold forming; similar mechanical strength, different chemical philosophy (lower carbon, microalloyed) |
DIN 17102 WStE500 High-Strength Weldable Fine Grain Structural Steel Coil Application Introduction
DIN 17102 WStE500 is designed for highly stressed welded structures where a combination of high strength, good toughness and reliable weldability is required. It is used across multiple industries to reduce weight and material thickness without compromising safety. Typical applications are in lifting equipment, heavy construction machinery, bridges, and offshore components. The material can be processed into various finished products by cutting, bending, welding, and machining.
Product Applications: Telescopic crane booms and outriggers, Bridge girders and box sections, Dump truck bodies and concrete mixer drums, Wind turbine tower shells and transition pieces, Offshore platform structural members, Heavy-duty access platforms and walkways, Hydraulic cylinder brackets and structural arms, Industrial storage tanks and silos
Processed into products: Welded I-beams and H-profiles, Cut and machined base plates and flanges, Bent or folded sheet metal brackets, Laser- or plasma-cut parts for mechanical assemblies, Rolled and welded cylindrical or conical sections
Application industries: Crane and lifting equipment manufacturing, Bridge construction and civil engineering, Heavy vehicle and trailer manufacturing (chassis, booms), Wind energy (tower sections, foundations), Offshore and marine engineering, Pressure vessel and boiler fabrication, Mining and earthmoving equipment, Structural building frameworks
DIN 17102 WStE500 High-Strength Weldable Fine Grain Structural Steel Coil Similar or Comparable Material Recommendations
| Country/Region | Standard | Designation | Remarks |
|---|---|---|---|
| Europe | EN 10025-3 | S460N / S460M | Lower strength class; may be used where 460 MPa yield is sufficient, more commonly available |
| Europe | EN 10025-6 | S500QL / S500QL1 | Quenched and tempered fine grain steel; higher strength level with different delivery condition |
| USA | ASTM A572/A572M | Grade 65 [450] | High-strength low-alloy niobium-vanadium steel; yield 450 MPa (65 ksi), lower than WStE500 |
| USA | ASTM A656/A656M | Grade 80 [550] | HSLA steel with yield 550 MPa; comparable mechanical properties, but different standard |
| Japan | JIS G 3106 | SM570 | Welded structural steel with min 460 N/mm² tensile (note: yield ~ 430-450 MPa), lower strength |
| China | GB/T 1591 | Q500D / Q500E | High strength low alloy structural steel, min yield 500 MPa, with toughness options |
Notes:
Special requirements: Optionally available with improved through-thickness properties (Z-quality) per EN 10164 or similar. Can be ordered with specific impact temperature classes (e.g., 0°C, -20°C). Ultrasonic testing can be included upon request. Welding must follow appropriate procedures with low-hydrogen consumables and controlled heat input to maintain HAZ toughness. For cold forming, the internal bending radius should be at least 2.0–3.0 times the thickness to avoid cracking. Pre-heating is recommended for thicker sections and at low ambient temperature to prevent hydrogen-induced cold cracking.
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