Stainless Steel Circle
Punched, laser-cut and plate-cut stainless circles and blanks from Ø 50 mm to Ø 2500 mm in 202, 304, 304 DDQ, 316L, 410 and 430 — deburred, PVC-protected and supplied ready for spinning, drawing and pressing.
What is Stainless Steel Circle?
A stainless steel circle is a round blank punched, laser-cut or turned from sheet, plate or coil, supplied in diameters from 50 mm to 2500 mm and thicknesses from 0.3 mm to 60 mm. Circles are the standard input for spinning, deep drawing and pressing operations — cookware bodies, dished ends, tank covers, blind flanges and filter plates — and Steelco supplies them in 202, 304, 304L, 316, 316L, 410 and 430 with deep-draw (DDQ) tempers, edge deburring and PVC protection.
All grades we stock in stainless steel circle.
Click any grade for its full chemical composition, mechanical properties, equivalents and typical applications. Every grade ships with EN 10204 3.1 / 3.2 certification from our Mumbai stockyard.
Why Choose Stainless Steel Circle
Deep-draw quality tempers
DDQ / EDD 304 and 202 circles are supplied in fully annealed condition with controlled grain size and low residual stress, so blanks draw without earing or splitting.
Blank-ready — no nesting waste
Buying finished circles removes the skeleton scrap of blanking from sheet; you pay only for the disc you use, which typically saves 15–25% of material on round parts.
Tight diameter tolerance
Punched circles hold ±0.5 mm on diameter and laser-cut circles ±0.2 mm, with concentricity suited to automatic feeding on spinning lathes.
Burr-free edges
Edges are deburred and, on request, rolled or radiused so blanks do not tear the draw ring and operators can handle them safely.
Any diameter, small or large
From 50 mm utensil blanks to 2500 mm plate discs for dished ends and tank covers, cut from plate up to 60 mm thick.
Technical Specifications
| Attribute | Details |
|---|---|
| Standards | ASTM A240 / A480 · ASME SA240 · EN 10088-2 · JIS G4305 |
| Product Type | Punched, laser-cut, plasma-cut and machined stainless circles / blanks / discs |
| Diameter Range | 50 mm to 2500 mm (larger discs by plasma cutting from plate) |
| Thickness Range | 0.3 mm to 60 mm |
| Grades Stocked | 202 · 304 · 304L · 304 DDQ · 316 · 316L · 321 · 410 · 430 |
| Finish | 2B, BA, No.4, No.8 mirror, HR No.1; matt / bright annealed for cookware |
| Diameter Tolerance | Punched ±0.5 mm · laser ±0.2 mm · plasma ±1.0 mm |
| Edge | Deburred as standard; rounded, chamfered or machined edge on request |
| Temper | Annealed / DDQ (deep-draw quality) for spinning and drawing applications |
| Hole Options | Centre hole, bolt-hole PCD and slots punched or laser-cut to drawing |
| Certification | EN 10204 3.1 standard · 3.2 with third-party witness on request |
Grade availability by diameter band
| Grade | UNS | 50–200 mm | 200–600 mm | 600–1200 mm | 1200–2000 mm | 2000–2500 mm |
|---|---|---|---|---|---|---|
| SS 202 | S20200 | — | — | |||
| SS 304 / 304L | S30400 / S30403 | |||||
| SS 304 DDQ | S30400 | — | — | |||
| SS 316 / 316L | S31600 / S31603 | |||||
| SS 321 | S32100 | — | — | |||
| SS 410 | S41000 | — | — | — | ||
| SS 430 | S43000 | — | — |
Note: Circles above 2500 mm diameter are supplied as segmented or petal-cut blanks for welding.
Use our free metal weight calculator — bars, sheets, plates, pipes and sections.
Grade chemistry and mechanical properties supplied in stainless steel circle.
Chemical composition and mechanical properties are grade properties, not form properties — the same grade keeps the same chemistry whether it is supplied as sheet, plate or coil. The tables below list the specified limits for each grade we stock in stainless steel circle, tested and certified to ASTM A240 / ASME SA240. Values are weight percent (maximum unless a range is shown); mechanical values are minima in the annealed condition.
Chemical composition (weight %)
| Grade | C | Mn | Si | P | S | Cr | Ni | N | Mo | Ti | Nb+Ta | Cu | Nb |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SS 201UNS S20100 | 0.15 | 5.50–7.50 | 1.00 | 0.060 | 0.030 | 16.0–18.0 | 3.5–5.5 | 0.25 | — | — | — | — | — |
| SS 202UNS S20200 | 0.15 | 7.50–10.00 | 1.00 | 0.060 | 0.030 | 17.0–19.0 | 4.0–6.0 | 0.25 | — | — | — | — | — |
| SS 304 / 304LUNS S30400 / S30403 | 0.08 (304) / 0.030 (304L) | 2.00 | 0.75 | 0.045 | 0.030 | 18.0–20.0 | 8.0–10.5 | 0.10 | — | — | — | — | — |
| SS 316 / 316LUNS S31600 / S31603 | 0.08 (316) / 0.030 (316L) | 2.00 | 0.75 | 0.045 | 0.030 | 16.0–18.0 | 10.0–14.0 | 0.10 | 2.00–3.00 | — | — | — | — |
| SS 321 / 321HUNS S32100 / S32109 | 0.08 (321) / 0.04–0.10 (321H) | 2.00 | 0.75 | 0.045 | 0.030 | 17.0–19.0 | 9.0–12.0 | — | — | 5×C–0.70 | — | — | — |
| SS 310 / 310SUNS S31000 / S31008 | 0.25 (310) / 0.08 (310S) | 2.00 | 1.50 | 0.045 | 0.030 | 24.0–26.0 | 19.0–22.0 | — | — | — | — | — | — |
| SS 347 / 347HUNS S34700 / S34709 | 0.08 (347) / 0.04–0.10 (347H) | 2.00 | 0.75 | 0.045 | 0.030 | 17.0–19.0 | 9.0–13.0 | — | — | — | 10×C–1.00 | — | — |
| SS 317LUNS S31703 | 0.030 | 2.00 | 0.75 | 0.045 | 0.030 | 18.0–20.0 | 11.0–15.0 | — | 3.00–4.00 | — | — | — | — |
| SS 904LUNS N08904 | 0.020 | 2.00 | 1.00 | 0.045 | 0.035 | 19.0–23.0 | 23.0–28.0 | — | 4.00–5.00 | — | — | 1.00–2.00 | — |
| 17-4 PHUNS S17400 | 0.07 | 1.00 | 1.00 | 0.040 | 0.030 | 15.0–17.5 | 3.0–5.0 | — | — | — | 0.15–0.45 | 3.0–5.0 | — |
| SS 410 / 410SUNS S41000 / S41008 | 0.15 | 1.00 | 1.00 | 0.040 | 0.030 | 11.5–13.5 | 0.75 | — | — | — | — | — | — |
| SS 430UNS S43000 | 0.12 | 1.00 | 1.00 | 0.040 | 0.030 | 16.0–18.0 | 0.75 | — | — | — | — | — | — |
| SS 409 / 409MUNS S40900 / S40930 | 0.030 | 1.00 | 1.00 | 0.040 | 0.020 | 10.5–11.7 | 0.50 | — | — | 6×C–0.75 | — | — | — |
| SS 441UNS S44100 | 0.030 | 1.00 | 1.00 | 0.040 | 0.030 | 17.5–18.5 | 0.50 | — | — | 0.10–0.60 | — | — | 0.30–0.90 |
Balance iron. Single figures are maximum limits. Mill test certificates to EN 10204 3.1 are issued with every dispatch.
Mechanical properties (annealed, minimum)
| Grade | Tensile Strength (min) | Yield Strength (0.2%) | Elongation in 50 mm | Hardness (Rockwell B) | Tensile Strength (H900) | Yield Strength (H900) | Hardness (Rockwell C) | Tensile Strength (annealed) | Hardness (Rockwell B, annealed) |
|---|---|---|---|---|---|---|---|---|---|
| SS 201 | 515 MPa (75 ksi) | 275 MPa (40 ksi) | 40% min | 95 max | — | — | — | — | — |
| SS 202 | 515 MPa (75 ksi) | 275 MPa (40 ksi) | 40% min | 95 max | — | — | — | — | — |
| SS 304 / 304L | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 40% min | 92 max | — | — | — | — | — |
| SS 316 / 316L | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 40% min | 95 max | — | — | — | — | — |
| SS 321 / 321H | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 40% min | 95 max | — | — | — | — | — |
| SS 310 / 310S | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 40% min | 95 max | — | — | — | — | — |
| SS 347 / 347H | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 40% min | 92 max | — | — | — | — | — |
| SS 317L | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 40% min | 95 max | — | — | — | — | — |
| SS 904L | 490 MPa (71 ksi) | 215 MPa (31 ksi) | 35% min | 90 max | — | — | — | — | — |
| 17-4 PH | — | — | 10% min | — | 1310 MPa (190 ksi) | 1170 MPa (170 ksi) | 40–48 | — | — |
| SS 410 / 410S | — | 275 MPa (40 ksi) | 20% min | — | — | — | — | 480 MPa (70 ksi) | 96 max |
| SS 430 | 450 MPa (65 ksi) | 205 MPa (30 ksi) | 22% min | 89 max | — | — | — | — | — |
| SS 409 / 409M | 380 MPa (55 ksi) | 205 MPa (30 ksi) | 20% min | 88 max | — | — | — | — | — |
| SS 441 | 415 MPa (60 ksi) | 205 MPa (30 ksi) | 18% min | 89 max | — | — | — | — | — |
Typical annealed values; actual results are stated on the heat-specific mill test certificate.
Application Sectors
Cookware & Utensils
Pressure-cooker bodies, pans, thalis and tumblers spun from 202 / 304 DDQ circles.
Dairy & Food Processing
Vessel ends, hoppers and covers drawn from 304 / 316L in hygienic finishes.
Pressure Vessel Ends
Torispherical and hemispherical dished-end blanks cut from 6–60 mm plate.
Filtration
Filter plates, screens and sieve discs with laser-cut hole patterns.
Flanges & Blinds
Blind-flange and closure-plate blanks machined from thick plate circles.
Automotive
Clutch plates, diaphragms and pressed housings from 410 and 304 blanks.
Lighting & Décor
Lamp reflectors and decorative spinnings in BA and mirror finish.
Water Storage
Tank tops, manhole covers and end caps in 304 / 316L.
Cut, finished and certified to your drawing.
Material leaves our Mumbai facility finished to your specification — not as raw stock.
Why buy from Steelco.
Steelco Metal & Alloys is a Mumbai-based stockist, importer and exporter of stainless steel and nickel alloys, shipping certified material worldwide.
Quality & testing on every dispatch
- EN 10204 3.1 mill test certificate on every dispatch
- 3.2 certification with TÜV / SGS / BV / Lloyd's / IRS / IBR witness on request
- Positive Material Identification (PMI) with portable XRF / OES
- Dye-penetrant (DPT), ultrasonic (UT) and hydro testing on request
- NACE MR0175 / ISO 15156 compliance for sour service
- PED 2014/68/EU compliance for pressure equipment
- Heat-number stencilling and marking for full traceability
Deep ready stock
Circles cut daily from over 800 MT of stock sheet, plate and coil in 202, 304, 304 DDQ, 316L, 410 and 430 — standard diameters ship in 24–72 hours and custom blanks in 3–5 working days.
Mill-direct sourcing
Approved supply from Jindal, JSL, Outokumpu, Aperam, Acerinox, Sandvik and leading Japanese and Korean mills — every item traceable to a named producer.
Full certification
EN 10204 3.1 mill test certificate as standard, 3.2 with TÜV, SGS, BV, Lloyd's, IRS or IBR witness, plus PMI, DPT and UT reports on request.
On-time worldwide delivery
Regular export shipments to the GCC, Africa, Southeast Asia, Europe, Latin America and the USA via Nhava Sheva (JNPT), Mundra and Mumbai ports.
How your material is packed and shipped.
Every consignment leaves our Mumbai facility protected for transit and documented for customs, whether it moves by road within India or by sea to an overseas port.
Domestic & export packing
- Circles stacked face-to-face with paper interleaving in wooden boxes
- PVC film applied on polished and BA faces before packing
- Strapped bundles on pallets for large-diameter discs
- Edge protectors and desiccant sachets for sea freight
Global shipments
- HS Code: 7219 · 7220 (blanks cut from flat-rolled stainless)
- FOB / CFR / CIF terms via Nhava Sheva (JNPT), Mundra and Mumbai ports
- Documentation: commercial invoice, packing list, MTC, bill of lading, COO, insurance
- Regular exports to the GCC, Africa, Southeast Asia, Europe, Latin America and the USA
Ready to price your requirement?
Share grade, size and quantity — our Mumbai desk responds with pricing, stock position and lead time, usually the same working day.
Frequently asked questions.
Answers to the questions our Mumbai desk is asked most often.
What is a stainless steel circle used for?
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Circles are round blanks used as the starting material for spinning, deep drawing and pressing. Typical end products are cookware bodies, dished vessel ends, tank covers, blind flanges, clutch plates and filter discs — anywhere a round pressed part is needed without the scrap of blanking from sheet.
What is DDQ and do I need it?
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DDQ means deep-draw quality: fully annealed material with controlled grain size and low residual stress, so blanks draw deeply without earing, orange-peel or splitting. Specify DDQ for cookware, sinks and multi-stage drawn parts; ordinary annealed circles are adequate for single-stage pressing and flat covers.
What diameter tolerance can you hold?
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Punched circles hold ±0.5 mm on diameter, laser-cut circles ±0.2 mm, and plasma-cut plate discs ±1.0 mm. Machined circles for flange and closure applications can be turned to ±0.1 mm where the drawing requires it.
Can you supply circles with a centre hole or bolt pattern?
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Yes. Centre holes, bolt-hole PCDs, slots and profiled cut-outs are punched or laser-cut in the same operation, so blanks arrive ready for assembly with no secondary drilling on your line.
Do circles come deburred?
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Edge deburring is standard on all circles. Rounded or chamfered edges are available on request, which is recommended where blanks are fed automatically or drawn through a hard draw ring.
Is there a minimum order quantity for circles?
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No minimum for standard diameters in stocked grades — orders start at a single piece. For very large diameters, unusual grades or thicknesses that must be rolled to order, a mill minimum applies with a 4–6 week lead time.