Properties and Applications of Martensitic Stainless Steel S42030 3Cr13
Martensitic stainless steel, also known as grade 420 stainless steel, is a steel alloy containing at least 12% chromium. It is characterized by its high strength and corrosion resistance, as well as its ability to be easily heat treated. One of the most widely known martensitic stainless steels is S42030 3Cr13, which is also referred as 420B. This stainless steel contains about 14-17% chromium and has a relatively low carbon content of 0.3%. This steel retains its strength at temperatures of up to 800°C (1,472°F) and is both oxidation and corrosion resistant. It is used in a great variety of industrial applications due to its unique combination of properties.
S42030 3cr13 Stainless Steel Physical Properties
S42030 3Cr13 has a density of 7.7 g/cm3 and its hardness rating ranges from HV 140 to HV250. It has excellent mechanical properties in terms of yield strength, tensile strength, and elongation. At room temperature, the yield strength of this steel is 210 MPa, the tensile strength is 380-420 MPa, and the elongation is 20-25%. It is also highly resistant to thermal shock and has a low thermal expansion coefficient.
High Hardness and Corrosion Resistance
S42030 3Cr13 is known for its high hardness. This stainless steel alloy has a Rockwell Hardness (HRC) of 40-43, which is considered exceptionally hard. It is also highly resistant to oxidation and corrosion. This steel has a precipitation-hardened surface layer that prevents penetration of corrosive substances, such as sulfuric acid. Additionally, it is renowned for its abrasion resistance, making it ideal for highly abrasive industrial applications.
Heat Treatment and Uses
S42030 3Cr13 is relatively easy to heat treat. It can be hardened by standard heat treatment processes, such as heating it to 820°C (1,508°F) for one hour followed by quenching. This steel also responds well to cryogenic treatment and can be softened by reheating and slow cooling.
S42030 3Cr13 finds extensive uses in the construction and automotive industries. It is often used to make furnace rollers, shearing blades, grinding implements, dies, and surgical instruments. It is also commonly used to produce cutlery and kitchen knives. Its high resistance to wear and abrasion makes it ideal for use in these industries.
Conclusion
S42030 3Cr13 is a martensitic stainless steel that is well known for its high strength and corrosion resistance. It has a hardness rating of up to 43 HRC and is highly resistant to oxidation and corrosion. This stainless steel is relatively easy to heat treat, and is often used in the automative and construction industries, as well as for surgical instruments, cutlery, and kitchen knives.
