We are Riddhi Siddhi Impex, a Mumbai-based Stainless Steel 430 Coils supplier and stockist, established in 2002. We hold ferritic 17% chromium coil stock to ASTM A240 / ASME SA-240, in thicknesses from 0.03 mm to 5 mm and widths up to 2000 mm. Our ISO 9001, 14001, and 45001 certified firm has a monthly supply capacity of 400 to 500 tonnes, with EN 10204 Type 3.1 / 3.2 mill certificates on request.
Stainless Steel 430 coil is a continuous flat-rolled length of ferritic grade built around 16.00 to 18.00% chromium with almost no nickel. That chromium raises a passive oxide film for oxidation and mild-corrosion service, while the ferritic structure keeps the alloy magnetic and priced below austenitic 304. It is not hardenable by heat treatment, so mills ship these stainless steel coils annealed for forming into panels, trim, and appliance bodies.
As a reliable 430 Stainless Steel Coil supplier, we stock these coils as ready inventory, sourced from reputed primary mills. Cold rolled coil arrives in 2B or bright annealed finish from 0.03 mm, while hot rolled coil covers the heavier gauges up to 5 mm. Every coil carries EN 10204 Type 3.1 / 3.2 documentation when requested and stays ferromagnetic throughout.
We provide ASTM A240 Grade 430 coils in the annealed mill condition, across several surface finishes and four edge options.
| Parameter | Details |
|---|---|
| Standard | ASTM A240 / ASME SA-240 |
| Grade | 430 (UNS S43000) |
| Thickness | 0.03 mm to 5 mm |
| Width | 3 mm to 2000 mm (custom slit, ±0.1 mm) |
| Coil Inner Diameter | 150 mm to 610 mm |
| Coil Outer Diameter | Up to 1800 mm |
| Condition | Annealed (standard mill) |
| Supply Form | Cold Rolled and Hot Rolled |
| Surface Finish | 2B, BA (Bright Annealed), Matte, Matte PVC |
| Edge | Slit edge, Mill edge, Deburred edge, Round edge |
Chromium is what defines Grade 430. At 16 to 18%, it forms the protective oxide that gives the coil its corrosion and scaling resistance without any nickel addition. The full ASTM A240 limits follow.
| Element | Composition (% by weight) |
|---|---|
| Carbon (C) | 0.12 max |
| Manganese (Mn) | 1.00 max |
| Silicon (Si) | 1.00 max |
| Phosphorus (P) | 0.040 max |
| Sulphur (S) | 0.030 max |
| Chromium (Cr) | 16.00 to 18.00 |
| Iron (Fe) | Balance |
Formability drives most Type 430 coil orders. Annealed material reaches a 450 MPa minimum tensile strength with 22% elongation, so blanks bend and draw without cracking. Grade 430 is not a hardness grade, and coils carry no temper ladder.
| Property | Value (Annealed) |
|---|---|
|
Tensile Strength, minimum
|
450 MPa (65 ksi) |
|
Yield Strength (0.2% offset), minimum
|
205 MPa (30 ksi) |
|
Elongation in 50 mm, minimum
|
22% |
|
Hardness, Rockwell B, maximum
|
89 HRB |
|
Hardness, Brinell, maximum
|
183 HBW |
Procurement teams ordering UNS S43000 coil, EN 1.4016 material, or SUS 430 coil under a local code can match designations through the table below.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | S43000 |
| Europe (EN) | X6Cr17 |
| Germany (W.Nr) | 1.4016 |
| Japan (JIS) | SUS 430 |
| China (GB) | 10Cr17 |
| Russia (GOST) | 12Х17 |
| UK (BS) | 430S17 |
These 4 industries utilise most of the 430 stainless steel coils we stock. Each value oxidation resistance, a magnetic ferritic structure, and a lower cost than nickel-bearing grades.
Appliance builders press SS 430 coils into dishwasher linings, refrigerator side panels, microwave cavities, and sink bowls. The grade takes a clean 2B or bright annealed finish that resists staining under domestic cleaning agents. It costs less than 304 and holds shape through deep-draw pressing.
Vehicle fabricators form Type 430 coil into decorative trim, wiper arms, and exhaust muffler bodies. The ferritic structure tolerates cyclic heat better than carbon steel and resists road-salt oxidation on cosmetic parts. Its magnetic response suits mounting hardware, and the bright finish supports exterior detailing.
Architects and interior fitters choose 430 stainless steel coils in bright annealed finish for lift interiors, wall cladding, and signage. The reflective surface stays presentable indoors where chloride exposure is mild. Panels form and fold without cracking, and the grade holds a consistent lustre at a moderate price.
Industrial equipment makers cut SS 430 coils into burner shrouds, furnace liners, and heat-exchanger baffles. The grade resists scaling in intermittent service to roughly 815 °C and expands less than austenitic steel through repeated firing, which reduces distortion in large heated fabrications.
Coil orders leave from our Mumbai and Taloja warehouses within days, packed for export sea freight.
| Parameter | Details |
|---|---|
| Packaging | Wooden cases, pallet packing |
| Incoterms | FOB, CIF, CFR, EXW Mumbai |
| Dispatch Points | Mumbai and Taloja warehouses |
| Standard Lead Time | 4 to 5 days |
| Urgent Dispatch | 2 to 3 days |
| Payment Terms | Advance, credit, LC |
| Certification | EN 10204 Type 3.1 / 3.2 on request |
Stainless Steel 430 Coils price in India runs around ₹90 to ₹250 per kg, roughly USD 0.95-2.65 per kg for export buyers. The range is indicative and moves with chromium and scrap market rates, thickness, width, finish, and order volume. Volume discounts apply, so call or WhatsApp us for today's rate.
We supply SS 430 coils in 2B, BA (Bright Annealed), Matte, and Matte PVC finishes. BA suits decorative and appliance work, 2B suits general forming.
Yes, 430 coils are welded by conventional TIG and MIG methods. Pre-heating near 150 to 230 °C and a post-weld anneal around 760 to 815 °C restore ductility in the heat-affected zone.
Grade 430 is ferritic, has 16-18% chromium, practically no nickel and remains magnetic at a lower cost. SS 304 is austenitic with 18% chromium and 8% nickel for greater corrosion resistance in more severe or wet service.
Yes, we export 430 coils worldwide, on FOB, CIF, CFR, and EXW terms from Mumbai port. Every export shipment carries EN 10204 Type 3.1 / 3.2 mill test certificates upon request.
You can get AISI 430 Coils at Riddhi Siddhi Impex. We are a supplier, stockist & exporter of ferritic coil stock in our warehouses at Mumbai and Taloja ready for dispatch. We serve buyers across India & overseas.
