Mechanical Properties of Martensitic Stainless Steel S45710 1Cr13Mo

Introduction

Martensitic stainless steel S45710 (1Cr13Mo) is a low-carbon alloy containing chromium, molybdenum, and nitrogen. Due to its high chromium and molybdenum content, S45710 exhibits excellent corrosion-resistance. The mechanical properties of this alloy depend largely on the heat treatment conditions and mechanical deformation.

Basic properties and composition

The average compositions of S45710 stainless steel is presented in Table 1 below.

Table 1. Chemical composition of S45710 stainless steel (wt.%).

Element Content

Carbon 0.090

Chromium 12.50

Manganese 0.80

Silicon 1.00

Molybdenum 0.75

Nitrogen 0.30

The nominal mechanical properties of S45710 stainless steel at room temperature (20℃) are shown in Table 2.

Table 2. Nominal mechanical properties of S45710 stainless steel at room temperature.

Property Value

Tensile strength (MPa) 580

Yield strength (MPa) 320

Elongation (%) 25

Brinell Hardness (HB) 150

Heat treatment of S45710 stainless steel

Good mechanical properties of S45710 stainless steel can be achieved through heat treatment. The mechanical properties of S45710 stainless steel can be modified by various annealing processes, such as solution annealing, full annealing, and stress-relieving annealing.

Solution annealing is the heating of a material above the critical temperatures followed by cooling in air or water. During solution annealing, the microstructure of steel is homogenized and precipitates are dissolved. This process can lead to improved strength and ductility.

Full annealing is the process of heating the material above its critical temperature, followed by slow cooling at a rate sufficient to allow pearlite to form. This process yields a relatively soft, tough, ductile material.

Stress relieving annealing is a process of heating the steel to a temperature below the critical temperature and then slowly cooling in air. This process reduces residual stresses and improves the workability of the material.

Mechanical deformation of S45710 stainless steel

The mechanical properties of S45710 stainless steel can be further improved through various cold-forming processes, such as cold rolling, cold drawing, and cold-heading. These processes lead to an increase in strength and hardness.

In cold rolling, the material is subjected to plastic deformation while it is at room temperature. This process leads to high strength and improved surface finish.

Cold drawing is the process of drawing a material at room temperature to reduce its cross-sectional area and increase its length. This process is used to produce seamless steel tubes and rods.

Cold-heading is the process of using a die to shape a heated steel rod or wire into complex shapes. The cold-forming process leads to an increase in strength and hardness.

Conclusion

In conclusion, S45710 stainless steel is a low-carbon alloy containing chromium, molybdenum, and nitrogen. It exhibits good corrosion-resistance due to its high chromium and molybdenum content. The mechanical properties of S45710 stainless steel can be improved through heat treatment and mechanical deformation. Solution annealing, full annealing, and stress-relieving annealing are the annealing processes used to modify the mechanical properties. Cold rolling, cold drawing, and cold-heading are the cold-forming processes used to further improve the mechanical properties.

Martensitic stainless steel S45710, which also goes by the designation of 1Cr13Mo, is an alternately air-hardened and heat-treated steel that exhibits improved corrosion, wear, and fatigue resistance. The basic martensitic stainless steel design, meaning that it is composed of 11.5 - 14.0% chromium and 0.25 - 0.6% molybdenum by weight, is crafted to take advantage of excellent toughness and ductility, coupled with enhanced corrosion resistance.

S45710 1Cr13Mo has a high hardness of about HRC40 and is able to maintain it even after severe cold working. The mechanical properties of the steel depend on the processing parameters and the final condition, including heat treatment and cold working. The tensile strength of S45710 1Cr13Mo is typically between 650 MPa and 800 MPa, with a yield strength of 545 MPa. It has a good balance of strength to hardness and can be used in many applications where wear and corrosion resistance are required.

Because the steel is hardenable and its composition can be adjusted to suit the application. It can be either hot or cold worked, but cold working is generally preferred due to the higher strength that can be achieved. The mechanical properties of S45710 1Cr13Mo are very efficient and are able to provide good protection in hostile environments. The steel is frequently used in applications requiring high strength, wear and corrosion resistance, such as blades, bearings, shafts, and pipelines.