Agricultural machinery operates in some of the harshest conditions, facing constant friction, heavy loads, and frequent shocks. Components like push rods, gears, and connecting parts are particularly vulnerable to wear and deformation. For manufacturers and users seeking longer service life and higher reliability, 40Cr round bar has proven to be one of the best material choices.
What is 40Cr Round Bar?
40Cr is a medium-carbon alloy structural steel with chromium as its primary alloying element. It is widely used in the machinery industry because it offers a balanced combination of hardness, toughness, and machinability. When produced as round bars and processed through quenching, tempering, and grinding, 40Cr achieves the mechanical properties required for heavy-duty agricultural applications.
Key Mechanical and Physical Properties
| Property | 40Cr Round Bar Performance |
|---|---|
| Hardness (tempered) | HRC 22–28, uniform and stable |
| Tensile Strength | 600–800 MPa, strong load-bearing capacity |
| Impact Resistance | High, reduces risk of sudden fractures |
| Wear Resistance | Excellent, ideal for high-friction environments |
| Straightness | High precision, critical for moving components |
| Corrosion Resistance | Good after grinding and plating treatment |
Why 40Cr is Ideal for Agricultural Machinery Parts
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Excellent Wear Resistance
Agricultural components such as push rods and gears undergo repeated friction. 40Cr’s hardness and microstructure ensure long-lasting resistance to wear. -
Toughness and Anti-Deformation
Farm machinery faces shocks and bending forces. With its strong toughness, 40Cr round bar resists deformation even under repeated stress. -
High Strength for Heavy Loads
Its tensile strength between 600–800 MPa makes it suitable for load-bearing parts like shafts and couplings. -
Surface Smoothness
Processed 40Cr round bars feature smooth surfaces, allowing better plating adhesion and reducing friction during operation. -
Corrosion Protection
Although not stainless steel, 40Cr performs well after electroplating or coating, providing enough rust resistance for agricultural conditions.
Typical Applications in Agriculture
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Push rods for rice transplanters and tractors
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Gear components in harvesting machinery
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Shafts and couplings in transmission systems
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Connecting parts exposed to high mechanical stress
These applications benefit from 40Cr’s balance of strength and machinability, reducing part replacements and lowering maintenance costs.
When it comes to agricultural machinery, durability equals efficiency. Choosing the right raw material for parts is critical. 40Cr round bar stands out as an excellent choice thanks to its wear resistance, strength, and reliable performance under harsh conditions. For farmers and manufacturers looking for stable and long-lasting parts, 40Cr round bar is a proven solution. If you need high-quality 40Cr round bars for agricultural machinery, Tongyi Metal is a trusted supplier providing reliable steel solutions.
