Products Description
S690 steel is known for its high yield strength, typically ranging from 690 MPa to 960 MPa, which allows for thinner sections in structural applications without compromising strength.
This characteristic not only reduces the weight of structures but also leads to cost savings in materials and transportation. The steel exhibits good toughness and ductility, which are critical for applications subjected to dynamic loads.
Chemical Composition
| Element (Symbol and Name) | Percentage Range (%) |
|---|---|
| C (Carbon) | 0.10 - 0.20 |
| Mn (Manganese) | 1.20 - 1.60 |
| Si (Silicon) | 0.10 - 0.50 |
| Cr (Chromium) | 0.30 max |
| Ni (Nickel) | 0.30 max |
| Mo (Molybdenum) | 0.10 - 0.15 |
Mechanical Properties
| Property | Condition/Temper | Test Temperature | Typical Value/Range (Metric) | Typical Value/Range (Imperial) | Reference Standard for Test Method |
|---|---|---|---|---|---|
| Yield Strength (0.2% offset) | Quenched & Tempered | Room Temp | 690 - 960 MPa | 100 - 139 ksi | ASTM E8 |
| Tensile Strength | Quenched & Tempered | Room Temp | 770 - 1100 MPa | 112 - 160 ksi | ASTM E8 |
| Elongation | Quenched & Tempered | Room Temp | 12 - 20% | 12 - 20% | ASTM E8 |
| Hardness (Brinell) | Quenched & Tempered | Room Temp | 200 - 300 HB | 200 - 300 HB | ASTM E10 |
| Impact Strength (Charpy) | Quenched & Tempered | -20°C | 27 J | 20 ft-lbf | ASTM E23 |
Physical Properties
| Property | Condition/Temperature | Value (Metric) | Value (Imperial) |
|---|---|---|---|
| Density | - | 7850 kg/m³ | 0.284 lb/in³ |
| Melting Point | - | 1425 - 1540 °C | 2600 - 2800 °F |
| Thermal Conductivity | 20 °C | 50 W/m·K | 34.5 BTU·in/h·ft²·°F |
| Specific Heat Capacity | 20 °C | 460 J/kg·K | 0.11 BTU/lb·°F |
| Coefficient of Thermal Expansion | 20 - 100 °C | 12 x 10⁻⁶ /K | 6.67 x 10⁻⁶ /°F |
Typical Applications and End Uses
| Industry/Sector | Specific Application Example | Key Steel Properties Utilized in this Application | Reason for Selection |
|---|---|---|---|
| Construction | High-rise buildings | High yield strength, weldability | Reduces structural weight |
| Mining | Excavator buckets | Toughness, impact resistance | Handles heavy loads |
| Offshore | Oil rigs | Corrosion resistance, strength | Endures harsh environments |
| Transportation | Bridges | High strength-to-weight ratio | Enhances load capacity |
Other applications include:
- Heavy machinery components
- Structural frames for industrial buildings
- Crane booms and supports
