Stainless steel SUS310S is a high chromium nickel austenitic stainless steel with a high carbon content. It has excellent mechanical properties, high temperature oxidation resistance and heat resistance. It is one of the most widely used heat-resistant stainless steels.

What is the Chemical Composition of SUS310S?

The chemical composition of SUS310S is listed in the table below. The main elements are chromium (Cr), nickel (Ni), carbon ©, silicon (Si), manganese (Mn), phosphorus (P) and sulfur (S).

Element

Cr

Ni

C

Si

Mn

P

S

Weight %

24-26

19-22

≤0.08

≤1.5

≤2

≤0.045

≤0.03

Tensile Strength: The minimum tensile strength of SUS310S is 520 MPa (75 ksi), which indicates that it has good strength and can withstand significant stress without breaking.

 

Yield Strength: The minimum yield strength of SUS310S is 205 MPa (30 ksi), which indicates that it has good resistance to plastic deformation and can return to its original shape after being subjected to stress.

 

Elongation: The minimum elongation of SUS310S is 40%, which indicates that it is ductile and can be deformed significantly before fracturing.

 

Hardness: The hardness of SUS310S is typically measured using the HBW (Brinell hardness) or HRC (Rockwell hardness) scale, and the minimum value for these scales is not provided. However, a value of 187 on the HBW scale or 200 on the HV (Vickers hardness) scale suggests that SUS310S is a relatively hard material.

 

Density: The density of SUS310S is 8.0 g/cm3 (0.29 lb/in3), which is relatively high and indicates that it is a dense material.

 

These properties make SUS310S a suitable material for high-temperature applications, where it needs to withstand thermal and mechanical stresses without degrading or losing its strength. In addition, SUS310S’s corrosion resistance, particularly in oxidizing environments, also makes it an ideal choice for many industrial applications.

What are the Mechanical Properties of SUS310S?

The mechanical properties of SUS310S are given in the table below. The main parameters are tensile strength, yield strength, elongation, hardness and density.

Property

Tensile Strength

Yield Strength

Elongation

Hardness

Density

Unit

MPa (ksi)

MPa (ksi)

%

HBW / HRC / HV

g/cm3 (lb/in3)

Value

≥520 (≥75)

≥205 (≥30)

≥40

187 / – / 200

8.0 (0.29)

What are the Physical Properties of SUS310S?

The physical properties of SUS310S are shown in the table below. The main parameters are melting point, specific heat, electrical resistivity, magnetic permeability, elastic modulus, thermal conductivity and coefficient of thermal expansion.

Property

Melting Point

Specific Heat

Electrical Resistivity

Magnetic Permeability

Elastic Modulus

Thermal Conductivity

Coefficient of Thermal Expansion

Unit

°C (°F)

J/kg·K (Btu/lb·°F)

μΩ·m (μin./in.·°F)

– (Approximate)

GPa (10^6 psi)

W/m·K (Btu/ft·h·°F)

10^-6/K (μin./in.·°F)

Value

1400-1450 (2550-2650)

500 (0.12) at 20°C (68°F)

0.78 at 20°C (68°F)

1.02 at 20°C (68°F)

200 (29.0) at 20°C (68°F)

14.2 (8.2) at 100°C (212°F), 18.7 (10.8) at 500°C (932°F)

15.9 (8.8) at 0-100°C (32-212°F), 16.2 (9.0) at 0-315°C (32-600°F), 17.0 (9.4) at 0-538°C (32-1000°F)

What is the Application of SUS310S?

SUS310S is a type of austenitic stainless steel that is commonly used in high-temperature applications due to its excellent resistance to heat and corrosion. It is composed of a combination of iron, chromium, and nickel, along with other elements such as silicon and manganese, which give it its unique properties.

One of the most common applications of SUS310S is in furnace materials and heat treatment equipment. These are applications where the steel needs to withstand repeated exposure to high temperatures without degrading or losing its strength. In these settings, SUS310S is often used for furnace liners, heating elements, and other components that are exposed to extreme heat.

Another important application for SUS310S is in heat exchangers. Heat exchangers are used in a wide range of industrial settings, including power generation, chemical processing, and food and beverage production. In these applications, SUS310S is valued for its ability to resist corrosion and its excellent thermal conductivity, which allows it to efficiently transfer heat from one fluid to another.

SUS310S is also used in the automotive industry, particularly in exhaust systems. Exhaust systems are exposed to high temperatures and corrosive gases, which can cause other types of steel to degrade quickly. SUS310S is resistant to these conditions, making it a popular choice for exhaust components such as mufflers and catalytic converters.

In addition to these applications, SUS310S is used in a variety of other high-temperature settings. It is commonly used in heat-resistant cookware, such as pots and pans, as well as in aerospace and defense applications where high-temperature resistance is critical. SUS310S is also used in the production of certain types of glass and in the manufacturing of certain types of electronic components.

Overall, SUS310S is a versatile and valuable material that is widely used in high-temperature applications across a range of industries. Its ability to resist heat and corrosion make it an ideal choice for components that must withstand extreme conditions, and its excellent thermal conductivity and other properties make it a popular choice for heat transfer applications as well.

Conclusion

Stainless steel SUS310S is a heat-resistant austenitic stainless steel with high chromium and nickel content. It has excellent mechanical properties, high temperature oxidation resistance and heat resistance.

It is suitable for applications that require repeated exposure to high temperatures, such as furnace materials, heat treatment equipment, heat-resistant cookware, heat exchangers, automotive exhaust parts and so on.