What is HARDO X400 equivalent grade in India

    
    The HARDO X400 is a 4-star rated stainless steel grade from Germany, categorised as 1.4003 grade. It is widely used in various manufacturing applications such as kitchen appliances, industrial components, and structural works. It is known for being highly resistant to corrosion and wear while providing good mechanical properties.
    
    In India, the HARDO X400 grade is equivalent to the standard grade of SS409 (AISI 409/UNS S40900). Both these grades are stainless steel ferritic grades that provide adequate strength and corrosion resistance. They have good fabrication and welding properties, making them suitable for a range of industrial applications.
    
    The HARDO X400 has a minimum content of 11.5% chromium while SS409 has a minimum content of 11.0%. Both the grades contain trace amounts of carbon and other minor alloying elements such as nickel and molybdenum. The main differences between these grades lie in their corrosion resistance properties. The HARDO X400 offers superior corrosion resistance in comparison to the SS409, especially when exposed to certain chemicals, making it more suitable for certain industrial applications.
    
    As for their applications, both grades can be used for making similar components and appliances. HARDO X400 is typically used for making kitchen sinks, countertops, clips and clamps, exhaust systems, and bolts. SS409 is preferred for automotive components such as exhaust manifolds, air and water cooled exhaust systems, as well as structural components like nuts, bolts, and screws.
    
    In terms of mechanical properties, both versions provide adequate toughness and strength, which can be further improved with appropriate heat treatment. HARDO X400 has a slightly higher yield strength and elongation compared to SS409, giving it slightly better performance.
    
    As for alloy cost, HARDO X400 is more expensive than SS409 due to its higher alloy content and thus, higher cost. This makes it more ideal for niche applications where corrosion resistance and high strength are a requirement.
    
    Overall, both versions provide adequate properties for a range of uses. But, it is important to consider their different properties while selecting the right grade according to the application, as corrosion resistance or thickness can play a role in the choice. One should always consult with a professional engineer before selecting the right grade for the intended application.