Stainless steel (SS) flanges are typically manufactured from austenitic stainless steel alloys most commonly grades304 and316 whose corrosion resistance and mechanical properties derive from their precise chemical compositions. Below is a summary of the key alloying elements and their typical weight percent ranges for these two grades:
| Element | SS304 (%wt) | SS316 (%wt) |
|---|---|---|
| Carbon (C) | 0.08Wikipedia | 0.08upmet.com |
| Manganese (Mn) | 2.00Wikipedia | 2.00upmet.com |
| Silicon (Si) | 1.00Wikipedia | 0.75upmet.com |
| Phosphorus (P) | 0.045Wikipedia | 0.045upmet.com |
| Sulfur (S) | 0.030Wikipedia | 0.030upmet.com |
| Chromium (Cr) | 18.0 20.0Wikipedia | 16.0 18.0upmet.com |
| Nickel (Ni) | 8.0 11.0Wikipedia | 10.0 14.0upmet.com |
| Molybdenum (Mo) | 2.0 3.0upmet.com | |
| Nitrogen (N) | 0.10upmet.com | |
| Iron (Fe) | Balance | Balanceupmet.com |
Grade304 ("18/8 stainless steel) is the most widely used SS flange material, valued for its general purpose corrosion resistance and formability .
Grade316 adds molybdenum for enhanced resistance to chlorides and marine environments, making it preferable for more aggressive service conditions
Minor elements (P, S, Si, Mn, N) are controlled to low maximum levels to optimize corrosion resistance and weldability.

Price:
Price 480.0 INR / Piece
Minimum Order Quantity : 1 Piece
Usage : Industrial
Surface Finish : Smooth
Material : SS
Features : Good Quality
Price 1200 INR / Kilograms
Minimum Order Quantity : 1 Number
Usage : Industrial
Surface Finish : Smooth
Material : SS
Features : Good Quality
Price 38 INR / Piece
Minimum Order Quantity : 1 Piece
Usage : Industrial
Surface Finish : Smooth
Material : SS
Features : Good Quality
Price 110 INR / Piece
Minimum Order Quantity : 100 Pieces
Usage : Industrial
Surface Finish : Finished Polished
Material : Steel
Features : Durable