DIN 17102 StE500 Hot Rolled Steel Coil
DIN 17102 StE500 Hot Rolled Steel Coil - Fine-Grain Weldable Structural Steel
Detailed material data for StE500 steel according to DIN 17102, including chemical composition, mechanical properties, thermal and electrical physical properties, international equivalents, and application guidance.
Hot rolling, normalizing, cutting, cold forming, welding (all common arc welding processes)
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DIN 17102 StE500 Hot Rolled Steel Coil Introduction
StE500 under the withdrawn DIN 17102 standard is a hot-rolled, weldable fine-grain structural steel with a minimum yield strength of 500 MPa in the normalized condition. It is designed for welded constructions requiring high strength, good toughness, and superior weldability. The grain refinement is achieved through microalloying elements such as niobium, vanadium, and titanium. Typical delivery condition is normalized or normalized rolled. This steel grade is widely used in heavy machinery, bridges, cranes, offshore structures, and pressure vessels. Modern equivalent is S500N according to EN 10025-3.
DIN 17102 StE500 Hot Rolled Steel Coil Chemical Composition
The chemical composition of StE500 is controlled for weldability and fine-grain structure. Carbon equivalent is kept low to ensure good cold-cracking resistance. Microalloying elements Nb, V, and Ti are used for grain refinement and precipitation strengthening. Maximum limits for phosphorus and sulfur are specified to guarantee toughness and hot workability.
| Element | Standard Value (max, unless range) | Remarks |
|---|---|---|
| Carbon (C) | ≤ 0.20 | Heat analysis |
| Silicon (Si) | 0.10 – 0.60 | Heat analysis |
| Manganese (Mn) | 1.00 – 1.70 | Heat analysis |
| Phosphorus (P) | ≤ 0.035 | Heat analysis |
| Sulfur (S) | ≤ 0.030 | Heat analysis |
| Aluminum (Altotal) | ≥ 0.020 | Grain refining element |
| Niobium (Nb) | 0.005 – 0.05 | Optional microalloy, alone or in combination |
| Vanadium (V) | 0.02 – 0.20 | Optional microalloy |
| Titanium (Ti) | 0.005 – 0.20 | Optional microalloy |
| Nitrogen (N) | ≤ 0.020 (typically) | Bound by strong nitride formers |
DIN 17102 StE500 Hot Rolled Steel Coil Thermal and Electrical Physical Properties
The following physical properties are typical for normalized fine-grain structural steels similar to StE500. Exact values can vary slightly with composition and temperature. These are provided for engineering reference and are not part of the DIN 17102 standard requirements. Data are valid at room temperature unless otherwise noted.
| Property | Typical Value | Unit | Temperature / Condition |
|---|---|---|---|
| Density (ρ) | 7.85 | g/cm³ | 20°C |
| Young's modulus (E) | 210 | GPa | 20°C |
| Shear modulus (G) | 81 | GPa | 20°C |
| Poisson's ratio (ν) | 0.3 | – | 20°C |
| Thermal expansion coefficient (α) | 11.1 | 10⁻⁶/K | 20 – 100°C |
| Thermal expansion coefficient (α) | 12.1 | 10⁻⁶/K | 20 – 200°C |
| Thermal conductivity (λ) | 48 | W/(m·K) | 20°C |
| Specific heat capacity (cp) | 460 | J/(kg·K) | 20°C |
| Electrical resistivity (ρe) | 0.22 | 10⁻⁶ Ω·m | 20°C |
DIN 17102 StE500 Hot Rolled Steel Coil Mechanical Properties
Mechanical properties depend on product thickness. The values below are for the normalized delivery condition. Tests are performed on transverse or longitudinal specimens as specified. Charpy impact energy values are guaranteed at -20°C (StE500 without additional suffix implies sufficient toughness at -20°C; the former standard required longitudinal energy not less than 40 J at -20°C). Bending tests are performed at room temperature with 180° bend.
| Property | Required Value | Unit | Test Condition / Thickness Range |
|---|---|---|---|
| Upper yield strength (ReH) | ≥ 500 | MPa | t ≤ 16 mm, transverse |
| Upper yield strength (ReH) | ≥ 480 | MPa | 16 < t ≤ 35 mm |
| Upper yield strength (ReH) | ≥ 460 | MPa | 35 < t ≤ 50 mm |
| Upper yield strength (ReH) | ≥ 430 | MPa | 50 < t ≤ 70 mm |
| Tensile strength (Rm) | 610 – 770 | MPa | t ≤ 70 mm |
| Elongation (A5, longitudinal) | ≥ 17 | % | t ≤ 16 mm |
| Elongation (A5, longitudinal) | ≥ 17 | % | 16 < t ≤ 35 mm |
| Elongation (A5, longitudinal) | ≥ 17 | % | 35 < t ≤ 50 mm |
| Elongation (A5, longitudinal) | ≥ 16 | % | 50 < t ≤ 70 mm |
| Elongation (A5, transverse) | ≥ 15 | % | t ≤ 16 mm |
| Charpy impact energy (KV, longitudinal) | ≥ 40 | J | -20°C |
| Charpy impact energy (KV, transverse) | ≥ 27 | J | -20°C |
| Bend test (180° bend) | No cracks | - | Mandrel diameter d ≈ 3a, a = specimen thickness (t ≤ 16 mm) |
DIN 17102 StE500 Hot Rolled Steel Coil Fully Equivalent Material Standards and Substitute Grades
| Country / Region | Standard | Grade | Remark |
|---|---|---|---|
| European Union | EN 10025-3:2004 | S500N | Direct successor of StE500; normalized fine-grain steel |
| European Union | EN 10025-3:2004 | S500NL | Low-temperature variant with guaranteed impact at -50°C |
| Germany | DIN 17102:1980 (withdrawn) | StE500 | Original designation |
| International | ISO 4950-2:1995 | HS490D / S500N | Equivalent high yield strength steel |
DIN 17102 StE500 Hot Rolled Steel Coil Application Introduction
StE500 is primarily used in welded constructions where weight reduction and high load-bearing capacity are critical. Due to its fine-grain structure and good toughness at low temperatures, it is suitable for dynamically loaded structures and service at moderate sub-zero temperatures. The material can be formed, punched, and welded with standard procedures. Preheating may be required for thick sections. It is not intended for heat treatment after welding; the normalized condition provides the design properties.
Product Applications: Welded bridge girders and box sections, Offshore platform legs and nodes, Heavy-duty crane booms and frames, Wind turbine towers and foundations, High-pressure penstocks and piping, Excavator buckets and booms, Chassis components for heavy transport vehicles
Processed into products: Flanges and webs for welded built-up sections, Boom segments and pivot pins for construction machinery, Node cans and stubs for jacket structures, Circular and square hollow sections for towers, End plates and stiffeners for pressure vessels, Supporting brackets and base plates in heavy equipment, Cut-and-welded parts for fatigue-loaded assemblies
Application industries: Civil engineering and infrastructure, Shipbuilding and offshore engineering, Heavy machinery and crane manufacturing, Wind energy (tower sections), Pressure vessel and boiler construction, Mining and earthmoving equipment, Railway vehicles and structural parts
DIN 17102 StE500 Hot Rolled Steel Coil Similar / Alternative Materials with Comparable Performance
| Country / Region | Standard | Grade | Remark |
|---|---|---|---|
| Japan | JIS G3106:2008 | SM570 | Weldable structural steel, min. yield 460 MPa, tensile 570–720 MPa; slightly lower strength |
| USA | ASTM A633/A633M | Grade E | Normalized high-strength low-alloy steel, min. yield 550 MPa (t≤100 mm); somewhat higher strength |
| USA | ASTM A572/A572M | Grade 65 [450] | HSLA steel, min. yield 450 MPa; lower strength but widely used |
| China | GB/T 1591-2018 | Q460D | High-strength low-alloy steel, min. yield 460 MPa; close in application |
| European Union | EN 10025-6 | S500Q | Quenched and tempered steel with similar yield strength, but different delivery condition |
Notes:
Welding: Low-carbon equivalent design ensures good weldability. Preheating and interpass temperature control according to EN 1011-2 is recommended for thicknesses above 30 mm. Forming: Cold forming up to 5% strain is permitted without subsequent stress relieving. Testing: Ultrasonic testing of plates according to EN 10160 or SEL 072 is often specified for safety-critical applications. Documentation: Inspection certificate 3.1 per EN 10204 is typical for StE500 deliveries.
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