We are Riddhi Siddhi Impex, a Mumbai-based manufacturer and supplier of 304 stainless steel strips, established in 2002. We precision slit Type 304 strip to ASTM A240 / ASME SA-240 and ASTM A666 from a 3 mm width, held to ±0.1 mm. As an ISO 9001, 14001, and 45001-certified company, we have a monthly supply capacity of 400-500 tonnes, with EN 10204 Type 3.1 / 3.2 mill test certificates on request.
Stainless Steel 304 strips are narrow, flat-rolled lengths of the most widely used austenitic chromium-nickel grade, holding 17.5 to 19.5% chromium and 8.0 to 10.5% nickel, the classic 18/8 stainless. The grade resists atmospheric, food, and mild chemical damage, forms and welds readily, and work hardens under cold rolling, so strength rises with every temper step. These Stainless Steel Strips are commonly used in general engineering and automotive components.
As a trusted 304 Stainless Steel Strip supplier and manufacturer, we slit each coil in-house from parent stock sourced from reputed primary mills, in gauges from 0.03 mm to 5 mm. Industrialists pick any temper from Soft through Full Hard, six finishes, and four edge conditions, with test papers on request.
Temper is the hardness level a strip carries after cold rolling, set by how much thickness reduction follows the last anneal. We supply Type 304 strip in six conditions, from Soft (Annealed) through to Full Hard. ASTM A666 defines and tabulates properties for Type 304 only up to Half Hard, so those three conditions carry standard-referenced figures on the certificate. Three-Quarter Hard, Hard, and Full Hard are mill tempers for this grade, rolled to tensile ranges agreed at order stage and recorded on the EN 10204 mill test certificate. Press behaviour changes sharply across that ladder, so the temper choice matters as much as the gauge on most stamping jobs.
Annealed strip is the fully softened condition, tested at 515 MPa minimum tensile and 205 MPa minimum yield with 40% elongation to ASTM A666. Deep drawing, tight bending, and multi-hit progressive work all start here, since the material takes reduction without splitting. Sink trim, utensil blanks, wash-down fittings, and drawn shells are the usual destinations. Buyers slitting soft 304 to narrow widths should expect a little coil set and camber, which is why we interleave paper on soft narrow coils and keep the tension light through the line.
This is the temper we quote most often when a shop wants a part that holds its shape but still needs one or two bends. ASTM A666 sets Quarter Hard Type 304 at 860 MPa minimum tensile and 515 MPa minimum yield with 10% minimum elongation. Springback is noticeable compared with annealed stock, so tooling usually needs an allowance built in on the first trial. Hose clamps, wiper components, light brackets, and connector shells run well in this condition.
Half Hard is the last Type 304 condition ASTM A666 tabulates, at 1035 MPa minimum tensile, 760 MPa minimum yield, and 6% minimum elongation. Forming is limited to gentle radii and simple profiles at this point; sharp bends across the rolling direction tend to crack. Battery tabs, shielding cans, clamping bands, and formed clips are typical uses. Slit edges come off harder here, so deburred or round edge is worth specifying if the strip feeds automated tooling.
Three-Quarter Hard sits beyond what ASTM A666 covers for Type 304, so we roll it as a mill temper to tensile ranges agreed at order stage, typically towards 175 ksi. Elongation drops low enough that forming is effectively restricted to flat parts and very light radii. Shims, gaskets, and stamped flat blanks are the realistic applications. If a design needs Three-Quarter Hard strength together with a guaranteed elongation minimum on the certificate, grade 301 is the correct call, since A666 tabulates that condition for 301.
Hard temper 304 solves the complaint we hear most often about softer strip, which is blanked parts that will not stay flat under load. Strength runs typically towards 180 ksi, recorded as a mill temper against the tensile range agreed at order stage. The certificate reports tensile and Rockwell figures from the actual coil rather than a standard table, and buyers should treat those as the reference for incoming inspection. Springs, spring clips, and load-bearing wall ties take this condition.
Full Hard is the maximum cold-rolled condition we roll in Type 304, typically towards 185 ksi tensile, again as a mill temper with the range set at order stage. Bending is not practical beyond a shallow flatten, and the strip is close to non-magnetic only in name, since heavy cold work transforms enough austenite to give a clear magnetic response. Flat springs, blade stock, and thin structural shims are where it earns its place. Order-desk note: at the harder end of the ladder we hold width tighter on the slitting line, because narrow Full Hard strip is far less forgiving of camber than annealed stock.
We provide ASTM A240 Type 304 strips in tempers from Soft to Full Hard, with six surface finishes and four edge options, precision-slit to width from ready Mumbai stock.
| Parameter | Details |
|---|---|
| Standard | ASTM A240 / ASME SA-240, ASTM A666 |
| Thickness | 0.03 mm to 5 mm |
| Width | 3 mm to 2000 mm |
| Width Tolerance | ±0.1 mm |
| Temper | Soft (Annealed), ¼ Hard, ½ Hard, ¾ Hard, Hard, Full Hard |
| Surface Finish | BA (Bright Annealed), 2B, Scotch-Brite, Matte, Matte PVC, Skin Pass |
| Edge | Slit edge, Mill edge, Deburred edge, Round edge |
| Supply Forms | Hot rolled and Cold rolled |
Chromium does the protective work here, forming a passive oxide film that heals itself in air, while 8 to 10.5% nickel holds the ductile austenitic structure, giving 18/8 stainless steel strips their name.
| Element | Composition (% by weight) |
|---|---|
| Carbon (C) | 0.08 max |
| Manganese (Mn) | 2.00 max |
| Phosphorus (P) | 0.045 max |
| Sulphur (S) | 0.030 max |
| Silicon (Si) | 0.75 max |
| Chromium (Cr) | 17.5 to 19.5 |
| Nickel (Ni) | 8.0 to 10.5 |
| Nitrogen (N) | 0.10 max |
| Iron (Fe) | Balance |
Annealed ASTM A240 Grade 304 strips start at 515 MPa minimum tensile strength with 40% elongation and 92 HRB maximum hardness. ASTM A666 tabulates Type 304 up to ½ Hard; we roll ¾ Hard, Hard, and Full Hard strips against tensile and Rockwell (HRC) ranges agreed at order.
| Temper | Tensile min (MPa / ksi) | Yield min (MPa / ksi) | Elongation min (%) |
|---|---|---|---|
|
Soft (Annealed)
|
515 / 75 | 205 / 30 | 40 |
|
¼ Hard
|
860 / 125 | 515 / 75 | 10 |
|
½ Hard
|
1035 / 150 | 760 / 110 | 6 |
Buyers working to European, Japanese, Chinese, or Russian standards can match UNS S30400 strip against the designations below.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | S30400 |
| Europe (EN) | X5CrNi18-10 |
| Germany (W.Nr) | 1.4301 |
| Japan (JIS) | SUS304 |
| China (GB) | 06Cr19Ni10 |
| Russia (GOST) | 08Х18Н10 |
These 6 industries use most of the AISI 304 strips we slit. Each buys the grade for its blend of corrosion resistance, formability, and clean surface finish.
Food equipment makers press Type 304 strips into conveyor parts, utensil blanks, sink trim, and wash-down fittings. The bare metal sheds no coating into product streams and polishes to a surface that bacteria struggle to grip.
Automotive suppliers form SS304 strips into hose clamps, trim mouldings, heat shields, and wiper parts. 304 Quarter Hard and 304 Half Hard strip tempers give clamps their spring bite while the chromium film keeps road-salt corrosion in check.
Electronics plants stamp 304 stainless strips into battery tabs, connector shells, shielding cans, and appliance springs. Gauge control from 0.03 mm suits fine stamping, and cold-worked tempers hold contact force through cycling.
Chemical processors specify SS 304 strips for vessel linings, dosing equipment, clamping bands, and transfer chutes carrying nitric and organic media. The passive layer reforms after every clean, so thin sections last uncoated.
Builders use Alloy 304 strips for cladding trim, expansion joint covers, wall ties, and lift interiors. The finish holds in urban atmospheres for decades, and cold-worked ties carry structural load without rusting behind the facade.
Engineering shops turn 304 stainless steel coil strips into springs, gaskets, shims, bellows, and formed clips. Work hardening during pressing strengthens each part, and deburred or rounded edges feed straight into automated tooling.
Orders move out of Mumbai and Taloja warehouses in wooden cases or on pallets, documented end-to-end.
| 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 mill test certificates on request |
SS 304 Strip price in India runs around ₹170-240 per kg, roughly $1.90-3.10 per kg for export buyers. Nickel rates move the figure, along with temper, thickness, width, finish, and volume. Call or WhatsApp us for today's rate.
The price of Stainless Steel 304 Strips per kg sits around ₹170-240 in India, or $1.90-3.10 for export orders. Send your exact specification for a firm quote.
Temper conditions for Stainless Steel 304 winding strips run from Soft (Annealed) through Quarter Hard, Half Hard, Three-Quarter Hard, and Hard to Full Hard, each defined by tensile strength range and Rockwell hardness.
Stainless Steel 304 Strips are non-magnetic in the annealed condition. Cold-rolled tempers pick up slight magnetism because some austenite transforms to martensite during rolling.
The difference between Stainless Steel 304 Strips and 304L Strips depends on carbon. Type 304 allows 0.08% maximum and takes the full temper ladder, while 304L holds 0.030% maximum for weldability and ships soft only.
304 Stainless Steel slitting coil can be slit to any width between 3 mm and 2000 mm on our lines, held to ±0.1 mm.
You can source Stainless Steel 304 Strips in India from us at Riddhi Siddhi Impex. Our Mumbai and Taloja warehouses hold 1.4301 strip ready for dispatch in 4 to 5 days, or 2 to 3 days for urgent orders. Call or WhatsApp us and we will provide a quote within 24 hours.
