35Cr Introduction
35Cr is a low alloy steel that has a content of chromium which is used as a structural steel in many products. It is a medium hardenability steel with the ability to be heat treated and it is often used with both a low and a high amount of carbon content. The presence of alloying elements and higher carbon content helps increase the strength of the steel and its resistance to wear.
Composition of 35Cr
35Cr contains the following chemical elements:
Carbon: 0.3-0.35%,
Manganese: 0.6 - 0.9%,
Phosphorus: 0.04%,
Sulfur: 0.04%,
Silicon: 0.2 - 0.5%,
Chromium: 0.8 - 1.1%,
Molybdenum: 0.15 - 0.3%,
Nickel: 0.25 - 0.6%,
Vanadium: 0.15 - 0.3%
Applications of 35Cr
35Cr is used in a variety of applications. The primary uses of this alloy steel include the production of automotive components, machine/tools, fasteners, molds, and ammunition. Additionally, 35Cr is used in the production of power transmissions, gears, bearing components, engine components, agricultural machinery components, and other products that require high strength and wear resistance. Due to its high tensile strength and work-hardening properties, 35Cr is also used in the production of springs, anchors, and hydraulic arms.
35Cr Heat Treatment
35Cr can be heat treated in a variety of ways depending on the desired end result. Common heat treating methods used with 35Cr steel include annealing, normalizing, quenching, and tempering. Generally, annealing is used to reduce the hardness of the metal and to improve the machinability of the steel. Normalizing involves heating the metal until it is hot enough to remove any internal stresses that might have been generated during the manufacturing process. Quenching is a process that involves cooling the metal quickly to strengthen it and improve its surface finish. Tempering is a process used to reduce the hardness of the metal to make it easier to work with.
Weldability of 35Cr
35Cr can be welded using conventional welding processes like shielded metal arc welding (SMAW) or gas metal arc welding (GMAW). It is important to preheat and postheat welding depending on the thickness of the material being welded. Preheating helps to reduce the risk of cracking during the welding process and postheating helps improve the properties of the weld by restoring embrittlement. 35Cr can also be joined to other materials by brazing and riveting.
Advantages of 35Cr
The primary advantages of 35Cr as a structural steel include the following:
• High strength - 35Cr has a higher strength and hardness compared to other steels in its class. This makes it ideal for use in applications that require high strength.
• Wear resistance - The chromium content of 35Cr steel gives it excellent wear resistance. This makes it suitable for applications that require high wear resistance.
• Cost effective - 35Cr is a low cost steel due to its low alloy and carbon content. This makes it ideal for cost sensitive applications.
• Versatility - 35Cr steel is highly versatile and can be used in a variety of applications.
Disadvantages of 35Cr
The primary disadvantages of 35Cr as a structural steel include the following:
• Low corrosion resistance - 35Cr has a lower corrosion resistance compared to stainless steels. This makes it unsuitable for applications that require high corrosion resistance.
• Low weldability - 35Cr is not as easy to weld compared to other steels. This makes it unsuitable for applications that require high weldability.
Conclusion
35Cr is a low alloy steel with a high carbon content making it a highly versatile material. 35Cr is widely used in the production of automotive components, machine/tools, fasteners, molds, and ammunition due its high strength and wear resistance. It can also be heat treated and welded using conventional welding processes like shielded metal arc welding (SMAW) or gas metal arc welding (GMAW). The advantages of 35Cr include its high strength, cost-effectiveness, and versatility, while the disadvantages include its lower corrosion resistance and weldability.
