We are Riddhi Siddhi Impex, a Mumbai-based manufacturer and supplier of Stainless Steel 301 strips, established in 2002. We precision slit Type 301 strip to ASTM A240 / ASME SA-240 and ASTM A666 in every temper from Soft to Full Hard. As an ISO 9001, 14001, and 45001-certified company, we have a supply capacity of 400-500 tons monthly, with EN 10204 Type 3.1 / 3.2 mill test certificates on request.
Stainless Steel 301 strip is a narrow, flat-rolled variant of the metastable austenitic grade engineered with 16 to 18% chromium and 6 to 8% nickel. During cold working, part of the austenite transforms into martensite, significantly increasing strength, raising mechanical properties to match aggressive spring demands. Because these specialised stainless steel strips achieve high tensile strength and yield performance, the alloy resists relaxation and permanent set under continuous tension. Stainless Steel 301 winding strip is typically used to manufacture spiral-wound gaskets, clockwork springs, and cable wrapping systems.
As a trusted 301 stainless steel strip supplier, we offer custom 301 SS slit coil configurations tailored to your exact production lines. We slit each 301 stainless steel strip in-house from a source coil sourced from reputed primary mills, in gauges from 0.03 mm to 5 mm. Buyers pick any temper from Soft through Full Hard, including high-yield 301 spring stainless steel strip variants, plus finish and edge condition, with mill test certificates on request.
Temper is the strength level a strip carries after cold rolling, set by how much the metal has been worked below its annealing point. We slit Type 301 in five conditions, running from Soft (Annealed) through Full Hard. ASTM A666 defines all five for this grade, which puts 301 in a small group where the harder tempers carry standard-backed tensile and yield minima rather than agreed ranges. That matters at the certificate stage: everything on this page is testable against a published table, not a mill understanding. Harder mill conditions such as spring temper and extra full hard are available on request, rolled to tensile ranges fixed at order stage.
Buyers who have fought with cracked flanges on a deep-drawn part usually end up here. Annealed 301 sits at 515 MPa minimum tensile and 205 MPa yield with 40% elongation, so the strip takes tight bends and severe draws without splitting at the radius. We interleave paper on soft narrow coils because the surface marks easily against itself in transit. Typical work includes deep-drawn housings, formed brackets, and blanks that get their strength from a later work-hardening step in the press rather than from the mill.
Quarter hard is the temper we quote when a stamping shop wants more spring-back resistance than annealed gives but still needs to form the part in one hit. ASTM A666 sets 860 MPa tensile and 515 MPa yield minimum, with 25% elongation and hardness around 25 HRC. Springback is noticeable on the press compared with soft strip, so tooling usually needs a small overbend allowance built in. It runs well into clips, light spring washers, and formed retaining components where the bend radius stays generous.
At 1035 MPa minimum tensile and 760 MPa yield, half hard is the common middle ground for spring work that still involves forming. Elongation drops to 18% and hardness sits near 32 HRC, which means bends want to run across the rolling direction wherever the drawing allows. Hose clamps, seat springs, and snap rings are the volume items we slit in this condition. Our slitting lines produce a cleaner burr at half hard than at annealed, since harder strip shears rather than tears at the knife.
Three-quarter hard covers the gap where full hard is too brittle and half hard too soft. The A666 minima are 1205 MPa tensile and 930 MPa yield at 12% elongation, with typical hardness around 37 HRC. Forming is limited to gentle bends and simple profiles; anything with a tight inner radius should be requoted a temper down. We see it specified for constant-force springs and structural clips where load capacity matters more than shape complexity.
Full hard delivers the maximum rolled strength for this grade, 1275 MPa tensile and 965 MPa yield minimum under A666, with 9% elongation and hardness near 41 HRC. Coil set is pronounced at this temper, and narrow slit widths can show camber, so we hold flatness checks on the line before packing. It goes into spring steel bands, spiral-wound gasket windings, and blade-type contacts that must return to shape over millions of cycles. If the part needs full hard strength but also a formed feature with guaranteed elongation, the honest answer is to move the bend to a secondary operation or split the assembly, since no rolled temper gives both.
We provide 301 SS strip to ASTM A240 and ASTM A666 in five tempers, five surface finishes, and four edge conditions, slit to width on our own lines.
| 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, Full Hard |
| Surface Finish | BA (Bright Annealed), 2B, Scotch-Brite, Matte, Matte PVC |
| Edge | Slit edge, Mill edge, Deburred edge, Round edge |
| Supply Forms | Hot rolled and Cold rolled |
Nickel content is the key factor controlling the alloy's work-hardening behaviour. At 6.0 to 8.0%, against 8.0 to 10.5% in Grade 304, the austenite stays metastable and hardens under the rolls, while 16.0 to 18.0% chromium maintains the passive film.
| Element | Composition (% by weight) |
|---|---|
| Carbon (C) | 0.15 max |
| Manganese (Mn) | 2.00 max |
| Phosphorus (P) | 0.045 max |
| Sulphur (S) | 0.030 max |
| Silicon (Si) | 1.0 |
| Chromium (Cr) | 16.0 to 18.0 |
| Nickel (Ni) | 6.0 to 8.0 |
| Nitrogen (N) | 0.10 max |
Cold work defines this grade. ASTM A666 tabulates Type 301 through Full Hard, so a 301 half hard strip or full hard strip ships against specification minima. The Rockwell figures below are typical of each temper.
| Temper | Tensile min (MPa / ksi) | Yield min (MPa / ksi) | Elongation min (%) | Hardness (typical) |
|---|---|---|---|---|
|
Soft (Annealed)
|
515 / 75 | 205 / 30 | 40 | 92 HRB max |
|
¼ Hard
|
860 / 125 | 515 / 75 | 25 | 25 HRC |
|
½ Hard
|
1035 / 150 | 760 / 110 | 18 | 32 HRC |
|
¾ Hard
|
1205 / 175 | 930 / 135 | 12 | 37 HRC |
|
Full Hard
|
1275 / 185 | 965 / 140 | 9 | 41 HRC |
Procurement teams matching a drawing callout can cross-check UNS S30100 strip against the designations below.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | S30100 |
| Europe (EN) | X10CrNi18-8 |
| Germany (W.Nr) | 1.4310 |
| Japan (JIS) | SUS301 |
| China (GB) | 12Cr17Ni7 |
| France (AFNOR) | Z11CN18-08 |
These 4 industries specify most of the Stainless Steel 301 strips we slit, drawn by the grade's spring strength and fatigue life.
Spring makers run Half Hard to Full Hard 301 strip into constant-force springs, snap rings, spring washers, and clips. The work-hardened structure snaps back after millions of cycles, and stainless steel flat spring material at 1275 MPa carries loads that would flatten a 304 part.
Vehicle plants press SS 301 strips into hose clamps, seat and seatbelt springs, exhaust flex sections, and wiper blades. Forming raises strength right where the metal bends, so thin sections hold clamping force through engine-bay heat and road salt without added weight.
Aircraft fabricators specify tempered AISI 301 strip for structural brackets, retaining springs, and floor components. Full Hard strength-to-weight trims grammes from every part, while the annealed temper forms deep shapes first and hardens where the press works it.
Electronics and appliance lines stamp 301 stainless steel strip into contact springs, connector clips, and battery tabs. Gauge control from 0.03 mm suits fine stamping, and spring tempers keep contact pressure steady through years of switching.
Orders are issued from our Mumbai and Taloja warehouses in wooden cases or on pallets, papers included.
| 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 |
Stainless Steel 301 Strips price in India is between ₹200-320 per kg; export buyers pay about $2.10-3.40 per kg. Nickel surcharges move the market weekly, and Full Hard or thin gauges carry a premium over annealed stock. Call or WhatsApp us for today's rate.
The price of Stainless Steel 301 Strips per kg runs around ₹200-320 in India, or $2.10-3.40 for export orders. Send your temper, thickness, and width for a firm quote.
Temper conditions for Stainless Steel 301 Strips cover Soft (Annealed), Quarter Hard, Half Hard, Three-Quarter Hard, and Full Hard, each set by tensile strength and Rockwell hardness under ASTM A666.
Stainless Steel 301 Strips stay close to non-magnetic in the annealed condition. Cold rolling turns part of the austenite into martensite, so each harder temper responds more strongly to a magnet.
The difference between half hard and full hard SS 301 strips comes down to strength against formability. Half Hard holds 1035 MPa minimum tensile with 18% elongation; Full Hard reaches 1275 MPa with 9%, trading bend radius for maximum spring force.
SS 301 strips differ from SS 304 strips through leaner 6 to 8% nickel, which lets 301 work harden to far higher tensile strength. That makes 301 the spring grade; 304 keeps the edge on corrosion resistance.
You can source Stainless Steel 301 Strips in India from us at Riddhi Siddhi Impex. Our Mumbai and Taloja warehouses hold Type 301 strip in common tempers for dispatch in 4 to 5 days. Call or WhatsApp us; quotations are provided within 24 hours.
