16MuCr5-SAE 5115 Alloy Round Steel Bar Krobo Steel

Grade :   16MnCr5
 Number:    1.7131
 Classification: Alloy special steel
Standard:  EN 10084: 2008 Case hardening steels. Technical delivery conditions
    EN 10132-2: 2000 Cold rolled narrow steel strip for heat treatment. Technical delivery conditions. Case hardening steels
    EN 10263-3: 2001 Steel rod, bars and wire for cold heading and cold extrusion. Technical delivery conditions for case hardening steels
    EN 10297-1: 2003 Seamless circular steel tubes for mechanical and general engineering purposes. Non-alloy and alloy steel tubes. Technical delivery conditions

Product Introduction

Composition: The “16” in 16MnCr5 indicates approximately 0.16% carbon content. The main alloying elements are:

Manganese (Mn): Enhances hardenability, toughness, and wear resistance.

Chromium (Cr): Improves hardenability, strength, and wear resistance.

Hardenability: 16MnCr5 has good hardenability, which means it can be hardened by heat treatment to achieve higher strength and wear resistance.

Machinability: It has good machinability in the untreated or annealed condition.

Applications: 16MnCr5 is commonly used for various components in engineering, automotive, and general machinery industries, where a combination of high strength, good wear resistance, and toughness is required. Some typical applications include gears, shafts, axles, and other mechanical parts.

Heat Treatment: To achieve the desired mechanical properties, 16MnCr5 steel can be heat-treated through processes like quenching and tempering.

Weldability: It can be welded, but preheating and post-weld heat treatment might be necessary to avoid cracking and achieve good weld strength.

Equivalent Grades: 16MnCr5 is similar to other alloy steels like 5115, 15CrMn, 1.7131, and others.

16MnCr5 chemical composition
C(%) Si(%) M(%) P(%) S(%) Cr(%)
16MnCr5 0.15 0.20 1.23 ≤0.030 ≤0.030 1.05
16MnCr5ESR) 0.15 0.20 1.23 ≤0.0015 ≤0.0015 1.05


16MnCr5 mechanical properties
Yield strength
Rp0.2 (Mpa)
Tensile strength
Rm (Mpa)
Decrease in
Area ᴪ (%)
Impact toughness value
akv(J/ c㎡)
≥1187(90) ≥880-1180 (100) ≥57 ≥9 ≥34 ≤207HB


16MnCr5 alloy steel finds applications in various industries and components that require a combination of strength, toughness, and wear resistance. Some common applications include:
1)Gears and Gear Components: 16MnCr5 is widely used for manufacturing gears in different industries, including automotive, machinery, and power transmission systems. The alloy’s good wear resistance and toughness make it suitable for high-load and high-stress gear applications.
2)Shafts and Axles: Due to its high strength and good machinability, 16MnCr5 is used to make shafts and axles for various mechanical systems, such as in automotive drivetrains and industrial machinery.
3)Crankshafts: In the automotive and engine manufacturing sectors, 16MnCr5 can be employed to produce crankshafts due to its favorable combination of strength and fatigue resistance.

4)Pistons and Connecting Rods: For some high-performance applications, 16MnCr5 may be used in manufacturing pistons and connecting rods that require high strength and wear resistance.
5)Ball and Roller Bearings: The alloy’s good hardenability and wear resistance make it suitable for certain types of ball and roller bearings that are subject to high loads and rotational forces.
6)Machine Components: 16MnCr5 is utilized for various machine components such as spindles, camshafts, and other mechanical parts that require a balance of strength and toughness.
7)Fasteners: In some cases, 16MnCr5 can be used for manufacturing high-strength fasteners like bolts and studs that need to withstand substantial loads.
8)Die and Mold Components: Due to its good machinability and wear resistance, this alloy steel may find use in certain die and mold components for metal forming and casting processes.
It’s essential to note that the specific application of 16MnCr5 alloy steel may vary based on the heat treatment, manufacturing process, and requirements of the individual component. Engineers and manufacturers must carefully select the appropriate materials and treatments to ensure optimal performance and reliability for their particular application.

Classification By Size

Diameter: Typically, 16MnCr5 alloy steel round bars are available in diameters ranging from 10 mm to 300 mm or more.
Length: The standard length for 16MnCr5 alloy steel bars is often 3 meters or 6 meters. However, custom lengths may also be available upon request.
Tolerance: Depending on the manufacturing process and the specific requirements of the customer, the tolerance for diameter and length may vary. Common tolerances for diameter are within a few millimeters.
Custom Shapes: Manufacturers can produce 16MnCr5 alloy steel in custom shapes based on the specific requirements of the application. This flexibility allows for a wide range of uses in various industries.

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