Know The Distinctions Between Different Types of Piston Rod

The piston rod is an essential component in many machines and systems, and there are various types to choose from. Knowing the distinctions between them can help you make the right choice for your particular application. It is important to understand the differences in materials, coatings, and sizes of piston rods to make the most informed decision possible.

Let's examine the mechanical characteristics, potential applications, and hardness of various piston rods.

Types of Piston rod

1. S45C piston rod
   S45C Piston rod is cold drawn, peeled, centerless ground, polished, and hard chrome plated to improve surface stiffness for friction and corrosion resistance. The material is also easy to machine, and its precision may meet international standards.

   • Tensile strength: > 630 MPa

   • Yield point:> 450 MPa

   • Percentage reduction of area after fracture: > 40 %

   • Elongation after fracture: > 7 %

   • Application: Crankshaft

2. S45C induction hardened rod
   The medium carbon steel used as the raw material for the S45C induction hardened rod was processed with induction hardening before precision ground and hard chrome plating. The casing is positioned 1–3mm below the surface. It can improve the capacity for friction, anti-impact, and corrosion resistance.

   • Tensile strength: > 569 MPa

   • Yield point: > 343 MPa

   • Percentage reduction of area after fracture: > 45%

   • Elongation after fracture: > 20 %

   • Application: Injection molding machine

3. SAE4140 quenched and tempered
   SAE4140 is a chromium-molybdenum alloy steel that has been quenched, a process of rapidly cooling the material to produce superior mechanical characteristics. The SAE4140 quenched steel offers increased strength, wear resistance, and toughness compared to similar materials. This makes it an attractive option for a wide range of applications due to its superior ability to withstand high temperatures and stress.

   • Tensile strength: > 1100MPa

   • Yield point:> 950MPa

   • Percentage reduction of area after fracture: > 45%

   • Elongation after fracture: > 12%

   • Application: Gears, crankshaft, shafts, etc.

4. Tempered piston rod
   High strength and superior elasticity are characteristics of tempered piston rods. Steel toughened through quenching is given toughness through the heat treatment known as tempering. The steel is heated to a martensite structure between 550 and 650 degrees Celsius. After the structure maintains this heat for a certain amount of time, cooling is carried out.

   • Tensile strength: > 630 MPa

   • Yield point:> 450 MPa

   • Percentage reduction of area after fracture: > 40 %

   • Elongation after fracture: > 7 %

   • Application: Crankshaft, shafts, etc.

The comparison between 45c and 4140 materials
When considering the comparison between 45c and 4140 materials, there are several differences to be aware of. 45c is a medium carbon steel known for its ductility, while 4140 is a chromium-molybdenum alloy steel known for its strength and toughness. 45c is often used in forgings and welded components due to its malleability, while 4140 is commonly used for shafts and gears. 45c is less resistant to corrosion and oxidation than 4140, so it is best suited for indoor applications. 4140, on the other hand, is much more resistant to corrosion and oxidation, making it a great choice for components used in outdoor environments.



The comparison between the induction piston rod and normal shaft
Regarding industrial applications, induction piston rods and normal shafts are the most popular components. While they can be used for similar applications, there are notable differences between them that should be considered when determining which is best for the job.

The construction is the primary difference between an induction piston rod and a normal shaft. An induction piston rod is an inductor with a solid piston driven by an induction motor. This type of construction allows for greater torque transfer, as the piston is driven by the motor and produces higher torque than a normal shaft. This makes induction piston rods ideal for applications requiring higher torque or acceleration.

For use in heavy machinery, the hydraulics industry, mining equipment, and agricultural machinery, Golden Asia is a reputable manufacturer of cylinder tubes, hydraulic pipe tubing, seamless carbon steel tubes, hydraulic tubing, cylinder chrome rods, hard chrome bars, hydraulic piston rods, hydraulic shafts, and piston shafts. Contact us for more details regarding hydraulic, cylinder, or steel manufacturing.