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High Strength 30CrMnSiNi2A Electroslag Round Steel from China Suppliers and Factory for Aerospace and Machinery
Material Performance Advantages
30CrMnSiNi2A is made by optimizing the alloy ratio.
| Carbon (C) | Manganese (Mn) | Silicon (Si) | Chromium (Cr) | Nickel (Ni) |
|---|---|---|---|---|
| 0.27%-0.34% | 1.00%-1.30% | 0.90%-1.20% | 0.90%-1.20% | 1.40%-1.80% |
After heat treatment, its excellent mechanical properties are fully demonstrated:
| Tensile Strength | Elongation | Sectional Shrinkage | Impact Energy |
|---|---|---|---|
| ≥1570MPa | ≥9% | ≥45% | ≥47 J |
The addition of nickel significantly inhibits hydrogen embrittlement sensitivity and improves toughness stability in low temperature environments.
After quenching and tempering treatment, the material has an extremely low fatigue crack growth rate and high fracture toughness. It is suitable for high dynamic load components (such as aircraft landing gear and engine brackets) and can withstand long-term cyclic stress without failure.
The electroslag remelting process effectively eliminates the point segregation, inclusions and gas defects common in traditional smelting, making the composition distribution more uniform and significantly improving the lateral mechanical properties and fatigue life.
The ESR process also improves the material's weldability and hot and cold processing properties, reducing the risk of cracking during subsequent processing.
Chromium and silicon elements enhance the surface hardness and oxidation resistance, with a hardness of up to 45-50 HRC. It is suitable for wear-resistant parts (gears, bearings), has stable corrosion resistance in neutral media, and can adapt to harsh environments after surface coating.
Application Areas
Aircraft landing gear, engine casing, helicopter rotor shaft and other key load-bearing components.
Tank armor, artillery structures, missile launchers, etc.
Heavy machine tool spindles, high-strength gears, bearings and automobile engine crankshafts.
Summarize
Through a combination of compositional design and electroslag remelting, 30CrMnSiNi2A electroslag round steel achieves a perfect balance of strength, toughness, and fatigue resistance, making it an irreplaceable material for high-end equipment manufacturing. Its reliability has been proven in demanding applications in the aerospace and military sectors, making it a core foundational material driving technological advancement and equipment upgrades.