DIN 2391-2 St 45 Steel Tube – Bright Drawn, Grade C Conduit‑Grade
Seamless precision steel tube made from St 45 is mainly used as construction element with special requirements in dimension accuracy, small wall thicknesses and good surface condition. The tubes are made in different grades (A and C). Grade C is valid for conduits. Grade A: for mechanical load without special grade requirement, without inspection certificate Grade C: for special requirements (testing after arrangement, e.g. bending, flanging, bulging a.o.) The weldability is given.
Properties
General
| Property | Temperature | Value | Comment |
|---|---|---|---|
Density | 23.0 °C | 7.8 - 7.9 g/cm³ | Typical for Low Carbon Steel |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Elastic modulus | 23.0 °C | 200 - 215 GPa | Typical for Low Carbon Steel |
Elongation | 20.0 °C | 5 % | |
Poisson's ratio | 23.0 °C | 0.29 [-] | Typical for Low Carbon Steel |
Shear modulus | 23.0 °C | 82 GPa | Typical for Low Carbon Steel |
Tensile strength | 20.0 °C | 580 MPa |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 23.0 °C | 1.32E-5 - 1.38E-5 1/K | Typical for Low Carbon Steel |
Max service temperature | 500 °C | Typical for Carbon Steel | |
Max service temperature, long | 0 - 300 °C | ||
Melting point | 1480 - 1526 °C | Typical for Low Carbon Steel | |
Specific heat capacity | 23.0 °C | 465 J/(kg·K) | Typical for Low Carbon Steel |
Thermal conductivity | 23.0 °C | 25 - 93 W/(m·K) | Typical for Low Carbon Steel |
Electrical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Electrical resistivity | 23.0 °C | 1.43E-7 - 1.74E-7 Ω·m | Typical for Carbon Steel |
Magnetic
| Property | Value | Comment |
|---|---|---|
Curie temperature | 770 °C | Typical for Low Carbon Steel |
Chemical properties
| Property | Value |
|---|---|
Carbon | 0.21 % |
Manganese | 0.4 % |
Phosphorus | 0.03 % |
Silicon | 0.35 % |
Sulfur | 0.025 % |
Metal
- DIN 2393-2 Standard – Grade St 28 Steel: Brightly Drawn, Hard Finish
- DIN 2391-2 Grade St 30 Al Bright Drawn Soft Steel Tube
- DIN 2391-2 Grade St 30 Al – Premium Bright Drawn Hard Steel Tube
- DIN 2391-2 Grade St 30Si: Bright-Drawn Soft Seamless Steel Tubes for Precision Construction
- DIN 2391-2 St 30 Si Steel Tube – Bright Drawn, Hard, High Precision
- DIN 2391-2 Grade St 52 Bright Drawn Steel Tube – Precision, Low Wall Thickness, Excellent Surface Finish
- DIN 2391-2 Grade St 52 – Precision Seamless Bright‑Drawn Steel Tubes
- DIN 2391-2 Grade St 35 Bright Drawn Soft Steel Tubes – Precision, Low Wall Thickness, Excellent Surface Finish
- DIN 2391‑2 Grade St 35 Bright‑Drawn Hard Steel Tube – Seamless Precision Construction Element
- DIN 2391-2 St 45 Steel Tube – Bright Drawn, Soft, Precision-Engineered