410S SMLS Pipes ASTM A268 TP410S Stainless Steel Seamless Tubes AISI Type 410S is a non-hardenable, low carbon modification of Type 410, providing moderate strength with moderate corrosion resistance. The low carbon content and a small titanium addition minimizes austenite formation at high temperatures, thereby restricting the alloy's ability to harden. The result is a soft, ductile condition when the material is rapidly cooled from above the critical temperature. The result is a soft, ductile condition when the material is rapidly cooled from above the critical temperature. The 410S stainless alloy is completely ferritic.