**Mechanical Properties and Chemical Composition of 27SiMn Seamless Steel Tube**
Below is a detailed overview of the mechanical properties and chemical composition of the 27SiMn seamless steel tube, which is widely used in various industrial applications due to its high strength and good toughness.
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### **Chemical Composition (Mass Fraction, %)**
| Element | Content (%) |
|---------|-------------|
| Carbon (C) | 0.24–0.32 |
| Silicon (Si) | 1.10–1.40 |
| Manganese (Mn) | 1.10–1.40 |
| Chromium (Cr) | — |
| Molybdenum (Mo) | — |
| Nickel (Ni) | — |
| Boron (B) | — |
| Vanadium (V) | — |
| Other | — |
The 27SiMn steel belongs to the low-alloy structural steel category, with a balanced combination of carbon, silicon, and manganese that enhances its strength and wear resistance. It is commonly used in hydraulic systems, automotive parts, and other high-stress environments.
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### **Mechanical Properties**
| Property | Value |
|----------|-------|
| Tensile Strength (σb) | ≥ 980 MPa |
| Yield Strength (σs) | ≥ 835 MPa |
| Elongation (δ5) | ≥ 12% |
| Section Reduction (ψ) | ≥ 40% |
| Impact Energy (Aku2) | ≥ 39 J |
| Brinell Hardness (HBS 100/3000) | ≤ 217 |
These values are obtained under specific heat treatment conditions, ensuring the material meets the required performance standards for demanding applications.
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### **Heat Treatment Details**
| Parameter | Value |
|-----------|-------|
| Quenching Temperature | 920°C |
| Quenching Medium | Water or Oil |
| Tempering Temperature | 450°C |
| Tempering Medium | Water or Oil |
Proper heat treatment is essential to achieve the desired mechanical properties and ensure long-term durability of the 27SiMn seamless steel tube.
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This type of steel is ideal for components that require high strength, good ductility, and resistance to fatigue and wear. Whether used in construction, machinery, or transportation, 27SiMn offers a reliable and cost-effective solution for engineers and manufacturers.
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