DIN 2391-2 Grade St 45 soft annealed (+A)
DIN 2391-2 Grade St 45 soft annealed (+A) introduction
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.
Equivalent material: BS CFS4, GOST 20, UNI Fe45-1, SS 1412, ASTM 1020, DIN DINEN10305-1, DIN 1.0408, DIN S255GT, DIN E255, BS E255, JIS STAM440G, JIS STAM440H, JIS STKM13B, JIS 13B, EN E255, EN 1.0408, ASTM Grade 1020
DIN 2391-2 Grade St 45 soft annealed (+A) general
| Property |
Temperature |
Value |
Comment |
| Density |
23.0 °C |
Density of 7.8 - 7.9 g/cm³ |
Typical for Low Carbon Steel |
DIN 2391-2 Grade St 45 soft annealed (+A) thermal
| Property |
Temperature |
Value |
Comment |
| Coefficient of thermal expansion |
23.0 °C |
Coefficient of thermal expansion of 1.32E-5 - 1.38E-5 1/K |
Typical for Low Carbon Steel |
| Max service temperature |
- |
Max service temperature of 500 °C |
Typical for Carbon Steel |
| Max service temperature, long |
- |
Max service temperature, long of 0 - 300 °C |
- |
| Melting point |
- |
Melting point of 1480 - 1526 °C |
Typical for Low Carbon Steel |
| Specific heat capacity |
23.0 °C |
Specific heat capacity of 465 J/(kg·K) |
Typical for Low Carbon Steel |
| Thermal conductivity |
23.0 °C |
Thermal conductivity of 25 - 93 W/(m·K) |
Typical for Low Carbon Steel |
DIN 2391-2 Grade St 45 soft annealed (+A) chemical
| Property |
Value |
| Carbon |
Carbon of 0.21 % |
| Manganese |
Manganese of 0.4 % |
| Phosphorus |
Phosphorus of 0.03 % |
| Silicon |
Silicon of 0.35 % |
| Sulfur |
Sulfur of 0.025 % |
DIN 2391-2 Grade St 45 soft annealed (+A) magnetic
| Property |
Value |
Comment |
| Curie temperature |
Curie temperature of 770 °C |
Typical for Low Carbon Steel |
DIN 2391-2 Grade St 45 soft annealed (+A) electrical
| Property |
Temperature |
Value |
Comment |
| Electrical resistivity |
23.0 °C |
Electrical resistivity of 1.43E-7 - 1.74E-7 Ω·m |
Typical for Carbon Steel |
DIN 2391-2 Grade St 45 soft annealed (+A) mechanical
| Property |
Temperature |
Value |
Comment |
| Elastic modulus |
23.0 °C |
Elastic modulus of 200 - 215 GPa |
Typical for Low Carbon Steel |
| Elongation |
20.0 °C |
Elongation of 21 % |
- |
| Poisson's ratio |
23.0 °C |
Poisson's ratio of 0.29 [-] |
Typical for Low Carbon Steel |
| Shear modulus |
23.0 °C |
Shear modulus of 82 GPa |
Typical for Low Carbon Steel |
| Tensile strength |
20.0 °C |
Tensile strength of 390 MPa |
- |
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