DIN 17102 EStE500 High-Strength Structural Steel Coil
DIN 17102 EStE500 High-Strength Normalized Fine Grain Structural Steel - Properties and Equivalents
Explore the chemical composition, mechanical and physical properties of EStE500 steel according to DIN 17102. Find equivalent grades such as EN 10025-3 S500N, typical applications in heavy machinery and bridge construction, and delivery conditions.
Welding, cutting, cold forming, machining, normalizing
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DIN 17102 EStE500 High-Strength Structural Steel Coil Introduction
DIN 17102 EStE500 is a weldable normalized fine grain structural steel with a minimum yield strength of 500 MPa. It belongs to the low-alloy high-strength category and is designed for heavy structural applications where high load-bearing capacity and good toughness are required.
- Good weldability due to low carbon equivalent and fine grain practice
- Excellent toughness at low temperatures, typically tested at -20°C
- Supplied in normalized or normalizing rolled condition
- Available in plate, strip, wide flat, and sections
DIN 17102 EStE500 High-Strength Structural Steel Coil Chemical Composition
Typical ladle analysis limits according to DIN 17102:1983 for grade EStE500. Aluminum is added as a grain refiner; niobium, vanadium, or titanium may be present singularly or in combination for microalloying.
- Maximum sulfur and phosphorus contents are tightly controlled for toughness.
| Element | Standard Value | Remarks |
|---|---|---|
| Carbon (C) | ≤ 0.22 | Maximum |
| Silicon (Si) | ≤ 0.55 | Maximum |
| Manganese (Mn) | 0.90 – 1.70 | Range |
| Phosphorus (P) | ≤ 0.025 | Maximum |
| Sulfur (S) | ≤ 0.025 | Maximum |
| Aluminum (Al total) | ≥ 0.020 | Minimum for fine grain |
| Niobium (Nb) | ≤ 0.05 | Optional microalloy |
| Vanadium (V) | ≤ 0.10 | Optional microalloy |
| Titanium (Ti) | ≤ 0.05 | Optional microalloy |
| Nitrogen (N) | ≤ 0.015 | Maximum |
DIN 17102 EStE500 High-Strength Structural Steel Coil Thermal and Electrical Physical Properties
Typical physical properties for normalized structural steel with a density of 7.85 g/cm³. Thermal conductivity and specific heat capacity are given for room temperature and moderate elevated temperatures.
- Values are average and may vary slightly depending on exact chemical composition and processing.
| Property | Standard Value | Unit | Test Condition |
|---|---|---|---|
| Density (ρ) | 7.85 | g/cm³ | At 20°C |
| Modulus of elasticity (E) | 210 | GPa | At 20°C |
| Shear modulus (G) | 81 | GPa | At 20°C |
| Poisson's ratio (ν) | 0.3 | — | At 20°C |
| Thermal expansion coefficient (α) | 12.5 × 10⁻⁶ | K⁻¹ | 20°C – 100°C |
| Thermal conductivity (λ) | 50 | W/(m·K) | At 20°C |
| Specific heat capacity (c) | 460 | J/(kg·K) | At 20°C |
| Electrical resistivity (ρ_e) | 0.20 – 0.25 | Ω·mm²/m | At 20°C |
DIN 17102 EStE500 High-Strength Structural Steel Coil Mechanical Properties
Transverse test piece properties for flat products in normalized delivery condition as per DIN 17102. Yield strength decreases with increasing product thickness. Minimum Charpy-V impact values are guaranteed at -20°C in longitudinal direction.
- Elongation is measured on a proportional gauge length L₀ = 5.65√S₀.
| Property | Standard Requirement | Unit | Test Condition |
|---|---|---|---|
| Yield strength ReH | ≥ 500 | MPa | Thickness ≤ 16 mm |
| Yield strength ReH | ≥ 480 | MPa | Thickness > 16 ≤ 35 mm |
| Yield strength ReH | ≥ 450 | MPa | Thickness > 35 ≤ 50 mm |
| Tensile strength Rm | 600 – 750 | MPa | Thickness ≤ 16 mm |
| Tensile strength Rm | 600 – 750 | MPa | Thickness > 16 ≤ 35 mm |
| Tensile strength Rm | 580 – 730 | MPa | Thickness > 35 ≤ 50 mm |
| Elongation A | ≥ 16 | % | Thickness ≤ 16 mm, L₀ = 5.65√S₀ |
| Elongation A | ≥ 15 | % | Thickness > 16 ≤ 50 mm, L₀ = 5.65√S₀ |
| Charpy-V impact KV (longitudinal) | ≥ 27 | J | At -20°C |
| Bend test (mandrel diameter) | d = 3a (t ≤ 16 mm) | — | 180° bend, a = specimen thickness |
DIN 17102 EStE500 High-Strength Structural Steel Coil Fully Equivalent Material Standards and Replaceable Grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Europe | EN 10025-3:2019 | S500N | Direct successor to DIN 17102 EStE500; normalized fine grain steel, min ReH 500 MPa |
| Europe (superseded) | EN 10113-2:1993 | S500N | Previous European standard, identical properties |
| Germany (obsolete) | DIN 17102:1983 | EStE500 | Original standard grade |
DIN 17102 EStE500 High-Strength Structural Steel Coil Application Introduction
EStE500 is used extensively in welded heavy constructions that demand high strength combined with good low-temperature toughness. Its normalized delivery condition ensures uniform mechanical properties and facilitates reliable welding and cutting. Typical industries and products include:
Product Applications: Crane booms, jibs, and chassis components, Welded bridge girders and support beams, Excavator buckets, arms, and frames, Offshore platform leg structures and node castings, Large-diameter penstocks and pressure vessels
Processed into products: Welded H-beams and box columns, Cut and formed heavy plate brackets, Machined base frames for heavy presses, Turret rings and slewing bearings, Reinforcing inserts for steel castings
Application industries: Heavy machinery and equipment manufacturing, Bridge building and civil infrastructure, Offshore and marine engineering, Pressure vessel and boiler fabrication, Building and industrial construction
DIN 17102 EStE500 High-Strength Structural Steel Coil Similar or Approximate Alternative Material Recommendations
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Europe | EN 10025-3 | S460N | Lower yield strength (460 MPa) but similar toughness and weldability; could be used with increased thickness if design permits |
| Europe | EN 10025-6 | S500Q | Quenched and tempered steel with 500 MPa yield; higher strength possible but different delivery condition and welding sensitivity |
| Europe | EN 10025-3 | S550N | Higher yield strength (550 MPa) normalized steel; may be suitable for weight reduction but needs assessment of formability |
| USA | ASTM A572/A572M | Grade 60 [415] | Yield strength 415 MPa, lower than EStE500. Not directly replaceable unless redesign |
| Japan | JIS G 3106 | SM570 | Yield strength 460 MPa (t≤16mm), similar application but slightly lower strength |
Notes:
Welding: Preheat may be needed depending on thickness and hydrogen control; low carbon equivalent (CEV typically ≤0.45) ensures good weldability with standard processes (GMAW, SAW).
- Forming: Hot or cold forming possible; cold bending radius typically 3t for t≤16 mm. Normalizing after severe cold forming may be required to restore toughness.
- Surface condition: Supplied as-rolled (normalized) with a mill scale surface free from detrimental defects.
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