20MnCr5 Round Bars are trusted across industries for their exceptional combination of strength, toughness and wear resistance. Known for their excellent hardenability, these bars perform extremely well in high-stress and high-impact environments. Their core toughness and strong surface hardness after carburizing make them ideal for precision-engineered parts. Whether used in automotive, machinery or heavy-duty mechanical components, 20MnCr5 delivers stable, long-lasting performance. These round bars offer a smooth finish, impressive dimensional accuracy and high endurance, making them a favorite material for manufacturers who need reliability, consistency and long service life.
20MnCr5 Round Bars are made from a refined alloy mix of carbon, manganese and chromium, supported by iron and small alloying elements for strength. The chromium content enhances hardness and wear resistance, especially after carburizing. They offer excellent tensile strength, high yield capability and strong impact durability. Their core remains tough while the outer surface achieves superior hardness, giving balanced performance. These bars also provide good machinability and fatigue resistance, making them suitable for demanding applications where strength, precision and long-term mechanical stability are essential.
|
Element |
Content |
|---|---|
|
Carbon, C |
0.310 – 0.380 % |
|
Iron, Fe |
98.63 – 99.09 % |
|
Manganese, Mn |
0.60 – 0.90 % |
|
Phosphorous, P |
0.040 % |
|
Sulfur, S |
0.050 % |
|
Properties |
Metric |
Imperial |
|---|---|---|
|
Tensile strength, ultimate |
585 MPa |
84800 psi |
|
Tensile strength, yield |
370 MPa |
53700 psi |
|
Modulus of elasticity |
190-210 GPa |
29700-30458 ksi |
|
Bulk modulus (typical for steel) |
140 GPa |
20300 ksi |
|
Shear modulus (typical for steel) |
80 GPa |
11600 ksi |
|
Poissons ratio |
0.27-0.30 |
0.27-0.30 |
|
Elongation at break (in 50 mm) |
30% |
30% |
|
Reduction of area |
53% |
53% |
|
Hardness, Brinell |
183 |
183 |
|
Hardness, Knoop (converted from Brinell hardness) |
204 |
204 |
|
Hardness, Rockwell B (converted from Brinell hardness) |
89 |
89 |
|
Hardness, Vickers (converted from Brinell hardness) |
192 |
192 |
|
Machinability (based on AISI 1212 steel. as 100 machinability) |
65 |
65 |
| EN Name | EN Number | DIN | JIS | UNI | BS |
|---|---|---|---|---|---|
| C35 | 1.0501 | C35, CM35 | S35C | C35 | 970 070M36 |
Yes, 20MnCr5 Round Bars can be used for underground applications due to their high strength and durability.
Yes, 20MnCr5 Round Bars may require corrosion protection coatings for enhanced durability in harsh environments.
Choose 20MnCr5 Round Bars based on required strength, wear resistance, and application-specific environmental conditions.
20MnCr5 Round Bars are widely used in industries that require parts with strong surface hardness and reliable core toughness. They are commonly used in gears, shafts, camshafts, crankshafts, pinions, fasteners, bearings, spindles and transmission components. The automotive sector depends heavily on this grade for high-performance drivetrain parts. Heavy machinery manufacturers prefer it for components that face friction, load and constant movement. Its ability to maintain strength after heat treatment makes it ideal for precision mechanical engineering. These round bars deliver consistent performance, long service life and durability, making them a preferred material for high-stress applications.
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