Cobalt Alloy Coil Supplier, Stockist and Exporter
Table of Contents
Aurico Alloys LLP supplies cobalt alloy 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.
Cobalt Alloy covers cobalt-chromium alloys combining wear resistance, hot strength and biocompatibility. 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 |
|---|---|---|
| Haynes 25 (L-605) | R30605 | AMS 5537 |
| Haynes 188 | R30188 | AMS 5608 |
| Elgiloy | R30003 | ASTM F1058 / AMS 5876 |
| MP35N | R30035 | Mill specification |
Grades and International Equivalents
| Grade | UNS | Werkstoff (W.Nr.) |
|---|---|---|
| Stellite 6 | R30006 | — |
| Stellite 12 | R30012 | — |
| Stellite 21 | R30021 | — |
| Haynes 25 (L-605) | R30605 | 2.4964 |
| Haynes 188 | R30188 | — |
| Elgiloy | R30003 | 2.4711 |
Chemical Composition
The Stellite grades pair 26-33% chromium with 4-13% tungsten and controlled carbon that forms hard chromium carbides. L-605 is Co-20Cr-15W-10Ni; Elgiloy is a Co-Cr-Ni-Mo spring alloy.
Mechanical and Physical Properties
Wear-grade Stellite reaches 40-55 HRC as cast and holds hardness at temperature. L-605 offers about 1000 MPa tensile with useful strength to 980°C, and Elgiloy work-hardens past 1800 MPa.
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 |
|---|---|
| Aerospace | Combustion hardware, springs and bearing surfaces. |
| Medical | Orthopaedic implants, stents and surgical instruments. |
| Oil and gas | Valve trim, hardfacing and downhole wear components. |
| Power generation | Steam-turbine erosion shields and valve seats. |
| Industrial wear | Cutting tools, extrusion dies and pump sleeves. |
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.