Special and Super Austenitic Stainless Steel Coil Supplier, Stockist and Exporter
Table of Contents
Aurico Alloys LLP supplies special stainless steel coil from ready stock in Mumbai to customers across India and in more than 40 export markets. Coil is the most economical way to buy sheet-gauge material when parts are blanked, roll-formed or slit to strip, because it removes the cut-length premium and keeps the surface consistent along the whole run.
Special Stainless Steel covers high-alloy austenitic stainless grades bridging the gap between 316L and nickel alloys. In-house slitting, cut-to-length, levelling and edge conditioning let us ship coil already sized for your press or roll former.
Sizes and Specifications
| Size range | Thickness 0.05 mm to 6.0 mm, width 3 mm to 1250 mm, supplied in slit coil, mill-edge coil or narrow strip. Coil weights and inside diameters are set to suit your decoiler. |
|---|---|
| Types and finishes | Available in annealed and pickled, bright annealed, cold rolled 2B, and No. 4 polished finishes, with edge condition slit, deburred or rolled to order. |
| Specifications | ASTM B906 / A240 / B265 as applicable to the grade, with ASME SB equivalents. |
| Certification | EN 10204 3.1 mill test certificate; 3.2 and third-party inspection on request |
| Origin | Indian and imported mills, fully traceable by heat number |
Specifications by Grade – Plate, sheet and strip
A specification is written for a product form. The standards below are the ones that cover plate, sheet and strip; the plate, bar and tube specifications for these grades are different documents and are listed on their own pages.
| Grade | UNS | Plate, sheet and strip specification |
|---|---|---|
| 904L | N08904 | ASTM B625 |
| 254 SMO | S31254 | ASTM A240 |
| AL-6XN | N08367 | ASTM B688 |
| Alloy 20 | N08020 | ASTM B463 |
| Alloy 28 | N08028 | ASTM B709 |
| Alloy 31 | N08031 | ASTM B625 |
| Alloy 926 | N08926 | ASTM B625 |
| Sanicro 35 | N08935 | ASTM B625 |
Grades and International Equivalents
| Grade | UNS | Werkstoff (W.Nr.) |
|---|---|---|
| Alloy 20 (Carpenter 20) | N08020 | 2.4660 |
| Alloy 28 (Sanicro 28) | N08028 | 1.4563 |
| Alloy 31 | N08031 | 1.4562 |
| Alloy 904L | N08904 | 1.4539 |
| 254 SMO | S31254 | 1.4547 |
| AL-6XN | N08367 | — |
| Alloy 926 | N08926 | 1.4529 |
| AM-350 | S35000 | — |
Chemical Composition
These grades carry 20-27% chromium, 18-31% nickel and 4-7% molybdenum, with copper added in Alloy 20 and 904L for sulphuric acid service and nitrogen in 254 SMO and AL-6XN to lift pitting resistance.
Mechanical and Physical Properties
Typical tensile strength is 490-690 MPa. PREN values of 43 and above for 254 SMO and AL-6XN give pitting resistance close to nickel alloys at appreciably lower cost.
Industry Applications
How coil and strip is used
Coil and strip are continuous cold-rolled flat product, bought to be worked rather than installed as they arrive. The common routes are stamping and deep drawing of gaskets, bellows, diaphragms and seals; forming of springs and spring washers; slitting to narrow strip for electrical contacts, battery tabs and current collectors; shim and vessel-lining stock; and as the feedstock from which welded tube and pipe are made. Thickness tolerance and temper matter more here than they do in any other form, because the material has to survive the press.
| Industry | Typical use |
|---|---|
| Chemical processing | Sulphuric and phosphoric acid plant, pickling lines and heat exchangers. |
| Pollution control | Flue-gas desulphurisation absorbers and scrubber internals. |
| Desalination | Seawater heat exchangers and high-chloride service. |
| Pulp and paper | Bleach plant equipment and chloride-bearing white liquor systems. |
| Oil and gas | Produced-water handling and offshore process equipment. |
Testing and Certification
Every consignment ships with an EN 10204 3.1 mill test certificate stating heat number, chemical analysis and mechanical properties. Depending on grade and specification we can supply positive material identification (PMI), ultrasonic and dye-penetrant testing, intergranular corrosion testing to ASTM A262 or G28, and third-party inspection release notes from Lloyd's Register, Bureau Veritas, SGS or TUV.
Aurico Alloys LLP operates an ISO 9001:2015 quality management system. Material for sour service can be supplied certified to NACE MR0175 / ISO 15156 where the grade permits.
Frequently Asked Questions
Request a Quotation
Send your grade, size, quantity and specification and we will respond with price and lead time, usually the same working day. Call +91 7977 88 6611 or email info@auricoalloys.com.