This is a type of corrosion that can occur in stainless steel when it is heated to high temperatures and allowed to cool slowly, causing carbides to form along the grain boundaries.
14 piece 3/8 Inch Drive stainless steel sockets and extension bars supplied on a clip rail 3/8 Inch drive Regular 6 point : 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19mm 3 Inch & 5 Inch extension bars. Teng Tools 14 Piece 3/8 Inch Drive Stainless Steel Socket Set - MS3814 It has a minimum tensile strength of 550 MPa and a minimum yield strength of 245 MPa. 4430 stainless steel has a relatively low carbon content, typically less than 0.03%, which means it is highly resistant to intergranular corrosion.