What is st 45.8 material
St45.8 is a low-alloy steel primarily containing carbon, silicon, manganese, phosphorus, and sulfur. It offers excellent ductility and weldability, making it widely used in manufacturing pressure vessels and boiler tubes.
The material characteristics of St45.8 give it significant application value in engineering. It possesses high strength and pressure resistance, enabling it to withstand high-temperature and high-pressure working conditions. Additionally, it exhibits good toughness and wear resistance, which helps prolong the service life of equipment.
What is the chemical composition of st45.8?
DIN 17175 Grade St 45-8 Tubes, are low-cost Low Carbon Steel Tubes with max 021 % carbon content with combination of 040-120 % manganese easy to form and shape .
| DIN17175 | C(Max) | Mn | Si(Min) | P(Max) | S(Max) | Tensile Strength(Mpa) | Yield Strength(Mpa) |
|---|---|---|---|---|---|---|---|
| St45.8 | 0.21 | 0.40–1.20 | 0.10–0.35 | 0.004 | 0.004 | 410-530 | ≥245 |
DIN17175 ST45.8 Mechanical Property (%):
|
Grade |
Materia |
Tensile Test MPa or N/mm2 |
Remaks(Similar to JIS) |
Possibility Temperature |
||
|
Min Yield point |
Tensile Strength |
|||||
|
t 16Max |
16 |
|||||
|
St45.8 |
1.0405 |
- |
245 |
410~530 |
23.5(STPT410, STB410) |
- |
ST45.8 V.S. P235GH
| Comparison Item | St45.8 (DIN17175) | P235GH (EN10216-2) |
|---|---|---|
| Standard System | German Standard (DIN) | European Standard (EN) |
| Material Type | Low Alloy Steel (Chrome-Molybdenum Steel) | Non-Alloy Steel (Carbon Steel) |
| Typical Chemical Composition | C, Si, Mn, P, S, Cr, Mo | C (≤0.16%), Mn (0.6-1.20%), P, S, Cr |
| Typical Mechanical Properties | High strength, high pressure resistance, good toughness | Yield strength ≥235MPa, tensile strength 360-480MPa, elongation ≥25% |
| Main Characteristics | High temperature and pressure resistance, wear resistance, extends equipment lifespan | Good plasticity, weldability, lower cost |
| Typical Applications | High-pressure boiler tubes, superheater tubes, reheater tubes, guide tubes, main steam tubes | High-pressure boiler tubes, superheater tubes, reheater tubes, guide tubes, main steam tubes |
DIN 17175 ST45.8 Tube Inspection & Test:
Flattening Test
Flaring Test
Hydrostatic or Nondestructive Electric Test
DIN17175 ST45.8 Boiler Tube Factory
