How Hard Is SUS 410 Stainless Steel Plate?

SUS 410 stainless steel plate, classified as a martensitic stainless steel under JIS G4304, is widely valued for its unique balance of hardness, strength, and corrosion resistance. Unlike austenitic stainless steels such as SUS 304, SUS 410 stainless steel plate contains a higher carbon content, which allows it to achieve significant hardness through heat treatment.

In its annealed condition, SUS 410 stainless steel plate typically offers a hardness of around HRB 88–100. This softer state is ideal for machining, forming, and other processing requirements, ensuring manufacturers can shape it into desired components with relative ease. However, the true advantage of SUS 410 stainless steel plate emerges after heat treatment. When quenched and tempered, its hardness can reach approximately HRC 35–45, making it considerably stronger and more wear-resistant compared to many other stainless steels.

This hardness makes SUS 410 stainless steel plate an excellent material for applications requiring durability and resistance to mechanical wear. It is commonly used in turbine blades, pump shafts, cutlery, and valve components—products that demand both toughness and surface hardness.

Moreover, while SUS 410 may not match the corrosion resistance of SUS 304, its ability to combine moderate corrosion protection with superior hardness makes it a cost-effective and reliable choice in many industrial sectors.

In conclusion, the hardness of SUS 410 stainless steel plate is highly adaptable. From a softer, workable state to a hardened, high-strength condition, it provides engineers with versatility to meet diverse performance requirements.