304H 321H

Grade 304H stainless steel is an austenitic chromium alloy with a higher carbon content than standard grade 304, that is cold–worked to generate a higher tensile strength.

Especially designed for use in higher elevated temperature applications, it resists most oxidising acids to withstand ordinary rusting and can be found in kitchens, pharmaceutical environments, heat exchangers, pressure vessels, chemical containers, pipelines, and anywhere such as the power generation industry where high temperature petroleum gases or steam production gases are used.

Benefits of using 304H stainless steel include:
• Greater heat resistance due to its high carbon content
• A higher tensile yield strength
• A greater short and long-term creep strength

Grade 321H stainless steel is a modification of Grade 321 with a higher carbon content, thus improving high temperature strength. With a temperature range of up to 900°C, 321H is also resistant to scaling and phase liability with resistance to aqueous corrosion.

Like other austenitic grades (321H is 304H stabilised by the addition of titanium), 321H is readily brake or roll formed, has excellent toughness and forming & welding characteristics and is particularly suitable for high temperature structural applications.

321H can be found in furnace parts, bellows, heat exchangers, heating elements, expansion joints and aircraft exhaust manifolds.