X6CrNiTi18-10 Steel Titanium Stabilized High-Temperature Resistance Forged Flange Welding Neck Flange

For flanges manufactured from 1.4541 steel, the typical chemical composition (in weight percent, % by mass) is:

• Austenitic stainless steel: The chromium (17–19%) and nickel (9–12%) levels place 1.4541 in the 18/10 austenitic stainless family, similar to 304/304L, but with titanium stabilization.
• Titanium stabilized: The addition of titanium (at least 5 times the carbon content) is critical. It binds carbon to form titanium carbides, which prevents chromium carbide precipitation at grain boundaries and enhances resistance to intergranular corrosion, particularly after welding or exposure to temperatures around 500–800°C.
• Controlled carbon content: While carbon is controlled (≤ 0.08%), the primary corrosion resistance mechanism in the heat-affected zone is titanium stabilization rather than the extra-low carbon approach used in "L" grades.

• EN Designation: X6CrNiTi18-10
• EN Numeric: 1.4541
• Approximate Equivalent: AISI 321

Flanges in 1.4541 are commonly manufactured according to EN 1092-1, ASME/ANSI B16.5, and other relevant standards. The chemical composition is governed by material standards such as EN 10088 for stainless steels.