20MnCr5 Round Bars

Chuck Metals, a reputable manufacturer and supplier located in Singapore, Pulau Ujong, specializes in high-quality 20MnCr5 Round Bars that are perfect for applications needing exceptional surface hardness and robust core strength. This low-carbon alloy steel is celebrated for its outstanding carburizing properties, making it a go-to choice for components that face wear and fatigue. Adhering to EN 10084 standards, Chuck Metals offers 20MnCr5 bars in various conditions—normalized, annealed, or hardened—ensuring tight dimensional tolerances and excellent machinability. These round bars are widely utilized in the automotive, engineering, and manufacturing sectors, crafted with precision to meet high-performance and durability standards.

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20Mncr5 Round Bars

AISI CS 20Mncr5 Hex Bar

Carbon Steel 20Mncr5 Square Bar

What is 20MnCr5 Round Bar?

20MnCr5 Round Bars typically consist of 0.17–0.22% carbon, 1.1–1.4% manganese, and 0.9–1.3% chromium, along with small amounts of silicon, phosphorus, and sulfur. After undergoing carburizing and quenching processes, they achieve a surface hardness ranging from 58 to 62 HRC, while still maintaining a tough core with a tensile strength between 900 and 1100 MPa. This steel showcases remarkable wear resistance, good ductility, and shock resistance, particularly when case-hardened. These characteristics make it an excellent choice for parts that require a hard exterior and a strong, impact-resistant core.

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Chemical Compositions of 20MnCr5 Round Bar

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 %

20MnCr5 Steel Round Bars Mechanical Properties

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

20MnCr5 Round Bar Equivalent Grades

EN Name	EN Number	DIN	JIS	UNI	BS
C35	1.0501	C35, CM35	S35C	C35	970 070M36

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Alloy 20 Round Bar Types

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20MnCr5 Round Bar Uses

20MnCr5 Round Bars find extensive use in the automotive and mechanical engineering fields for creating components that demand high surface hardness and a resilient core. Common applications include gears, shafts, bushings, pinions, camshafts, crankshafts, and connecting rods. These bars are particularly suited for parts that experience surface wear, friction, and dynamic loads. Their superior case hardenability makes them a preferred option for precision machined components in transmissions, drive systems, and construction equipment. The balance of strength and ductility in 20MnCr5 also makes it suitable for aerospace subcomponents and agricultural machinery.

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