316Lmod

The designations for steel plates are SA240 and S31603. I’m not sure what your “mod” refers to.

The difference between 316L and 316Lmod is the same as the difference between urea-grade stainless steel pipes and ordinary 316L

No corresponding grade was found, so you’ll have to look it up on your own.

316Lmod is modified 316L, an improved version of 316L, specifically designed for the urea industry to enhance the corrosion resistance of welds. 316Lmod is an ultra-low carbon steel with excellent resistance to intergranular corrosion. It is an ultra-low carbon austenitic stainless steel that offers good weldability, making it suitable for multi-layer welding; there is no tendency for edge corrosion after welding. It also exhibits good corrosion resistance to sulfites, sulfuric acid, phosphoric acid, acetic acid, formic acid, chlorides, halogens, and sulfates. It is generally used to manufacture industrial equipment for industries such as chemicals, fertilizers, and chemical fibers, such as containers, pipes, and structural components. 　　 316Lmod is a material grade that primarily contains Cr, Ni, and Mo; the numbers indicate the approximate percentage content, and it is an American material grade. C max 0.03, Cr 17.0–18.5, Ni 13.0–15.0, Mo 2.20–3.0 ； Simax1.0 ； Mn max2.0 ； P max 0.045, S max 0.22 ； Mechanical properties: Tensile strength σb (MPa): ≥480; Conditional yield strength σ0.2 (MPa): ≥177; Elongation δ5 (%): ≥40; Cross-sectional shrinkage ψ (%): ≥60; Hardness: ≤187HB; ≤90HRB; ≤200HV. Heat treatment specification: Solution treatment at 1010–1150°C followed by rapid cooling. Microstructure: Characterized as austenitic. For reference only

This is the basic material description; I know! ! Now, to declare the materials, I need the specific American standard designation for 316Lmod! I couldn’t find it :(

There is no corresponding standard in American standards; the United States prefers to use 317L.