Mechanical Properties of Austenitic Stainless Steel S30510 1Cr18Ni12

Mechanical Properties of Austenitic Stainless Steel S30510 1Cr18Ni12

Austenitic stainless steel S30510 1Cr18Ni12 is an austenitic stainless steel belonging to the 1Cr18Ni12 series of austenitic stainless steel. It is a martensitic structure and is a high-strength chromium nickel austenitic stainless steel. The grade has excellent cutting performance and corrosion resistance, low thermal expansion coefficient and better process performance.

The mechanical properties of S30510 1Cr18Ni12 stainless steel are shown in Table 1. The tensile strength of S30510 1Cr18Ni12 stainless steel can reach 520-690MPa, the elongation after break can reach more than 40%, and the impact toughness and fatigue strength have excellent properties.

Table1: Mechanical properties of S30510 1Cr18Ni12 stainless steel

Tensile strength

Tensile strength of S30510 1Cr18Ni12 stainless steel is nearly 520-690MPa (74-100 KSI). Its excellent ductility allows for stretch forming. The measured tensile strength can be positively affected by various forming methods.

Elongation

The elongation of S30510 1Cr18Ni12 stainless steel is more than 40%. It has excellent work hardening properties and excellent plasticity. The elongation of stainless steel can be improved by heat treatment and processing.

Impact Toughness

The impact toughness of S30510 1Cr18Ni12 stainless steel is 26J (20 ft-lbf). This stainless steel is characterised by its excellent toughness and impact resistance. It is suitable for applications that require good impact loads.

Fatigue Strength

Fatigue strength of S30510 1Cr18Ni12 stainless steel is nearly 137Mpa (20 ksi). The steel has good fatigue properties and can minimize the effect of fatigue on the structure under dynamic load conditions.

Wear Resistance

S30510 1Cr18Ni12 stainless steel has excellent wear resistance. The wear resistance of steel can be improved by adding appropriate amount of alloy elements such as molybdenum, niobium, titanium, etc.

Conclusion

Austenitic stainless steel S30510 1Cr18Ni12 has excellent mechanical properties such as high tensile strength, good elongation, good impact toughness, excellent fatigue strength and good wear resistance. Due to its excellent mechanical properties, this grade of stainless steel can be used for various applications such as components with high service temperature, pressure vessels, heavy machinery parts, etc.

S30510 (1Cr18Ni12) austenitic stainless steel belongs to the chromium-nickel austenitic stainless-steel family. Characteristic of this steel is the addition of nitrogen and lack of molybdenum, which makes it superior to its sister AISI 304 in term of strength and hardness. Also, the presence of austenite in its microstructure gives the steel excellent ductility and toughness.

Tensile strength of S30510 (1Cr18Ni12) is highly dependent on the manufacturing process. In order to achieve maximum tensile strength, any mechanical working process (tempering, rolling or annealing) should be avoided. The cold-working process should be adjusted to obtain ultimate tensile strength of 480-700 MPa. In the normalized condition, the strength increases to 600-800 MPa.

The elongation at break of S30510 (1Cr18Ni12) is usually 15-30% and it is highly dependent on the cold-working process. In the annealed condition, it is usually between 20-30%. Furthermore, the hardness of this steel ranges between 165-220HB in the annealed condition and 180-240HB in the hardened condition. After the cold-working process, the hardness reduces to 150HB.

The creep strength of S30510 (1Cr18Ni12) is better than AISI 304 steel and it is mainly affected by the addition of nitrogen into the microstructure. This stainless-steel is highly resistant to creep failure even at elevated temperatures (600-800°C) for prolonged periods of time (several hours).

Finally, the corrosion resistance of S30510 is better than AISI 304 steel if it is properly processed. Properly annealing, passivation, and pickling processes should be used to achieve maximum corrosion resistance. If it is cold-worked, the corrosion resistance is reduced to medium levels.