55Si2MnB spring steel

Spring structural steel 55Si2MnB

Spring steel 55Si2MnB is a national standard steel number. It is commonly used by the automotive spring industry for the production of car leaf springs. 55Si2MnB has a high strength, good surface quality and anti-friction performance.

55Si2MnB is a high-strength spring steel used for many automobile leaf spring production. It has good static fatigue strength, static strength and impact fracture. It also has good surface finish, strong friction reduction properties, and good machinability.

Chemically, 55Si2MnB is composed of 0.51-0.56 of silicon, 0.62-0.70 Carbon, 0.90-1.20 of Manganese, and 0.20-0.30 phosphorus, 0.15-0.40 sulfur, and a remainder of Iron.

55Si2MnB has a high strength and good elasticity with resilience that achieves a specific tensile strength. It has a good surface performance and anti-friction performance. The 55Si2MnB also has a high fatigue strength with good fatigue performance.

The production of leaf spring requires high strength, rigidity and strength, as well as a good surface quality. The mechanical properties of 55Si2MnB steel have been optimized through a variety of processes. The use of 55Si2MnB steel has enabled the production of large-scale highly elastic leaf springs with a large-scale workpiece thickness and a uniform large-scale surface quality.

The 55Si2MnB steel has good machinability, formability, and heat treatment resistance, making it an ideal steel for the production of high tensile strength leaf springs. It also has good forming and welding performance, which allows the production of complex mechanical spring components.

In conclusion, 55Si2MnB spring steel is a national standard steel with a high strength and good elasticity, making it a great choice for the production of leaf springs. It also has a high fatigue strength and good fatigue performance, as well as good resistance to heat, corrosion and wear. The good machinability, formability, and heat treatment resistance also make it an ideal choice for the production of high Tensile strength leaf springs.

55Si2MnB Spring Steel

55Si2MnB spring steel is one type of spring steel produced with the addition of Mn, Si and B elements. It has superior elasticity, ability to resist fatigue and low cost. Due to its excellent performance, it is widely used in the production of auto and motorcycle engines, vibration damping, automotive suspension, torsion and compression springs, gears and other parts.

The chemical composition of the 55Si2MnB spring steel is C 0.53%, Si 1.60-2.00%, Mn 1.70-2.00%, B 0.0005-0.003%, P max 0.035%, S max 0.035%, Cr max 0.25%.

The mechanical properties of 55Si2MnB spring steel include 0.20-0.35% tensile strength, 492-690 MPa yield strength, 5.50-7.50% elongation (annealing), and 12.0-13.0% elongation (production). It has good yielding and tensile characteristics and a modulus of elasticity of about 210 GPa.

The 55Si2MnB spring steel has good heat treatment characteristics. It is usually annealed between 650℃-740℃ and then cooled in two or three stages, depending on the application requirements. The quenching process depends on the application as well; water cooling is recommended for small parts of limited thickness while oil cooling is recommended for bigger parts. Tempering between 160℃-180℃ significantly improves the durability of the 55Si2MnB spring steel.

Ultimately, the 55Si2MnB spring steel is a great choice for the production of auto and motorcycle engines and other applications. It has a good balance between tensile and yield strength, good elasticity and low cost. Its heat treatment characteristics make it a versatile option for any application.