Sheets, Plates & Coils
Flat-rolled metal — sheet, plate and coil — in carbon, alloy, stainless and duplex grades. Stainless is supplied to ASTM A240; carbon and alloy pressure-vessel plate to A516 / A387 (under the A20 general requirements) and structural plate to A36 / EN, in hot-rolled, cold-rolled and finished surfaces. Pressure-vessel compliance depends on the specified material and delivery requirements, not thickness alone.
Choose a form
Each form links to grades, finishes, standards and a product-specific enquiry.
Technical specification
| Parameter | Specification |
|---|---|
| Product | Flat-rolled sheet, plate & coil |
| Dimensional standard | ASTM A480 (stainless flat-rolled) · A6 (carbon structural plate) · A20 (carbon & alloy PV plate) |
| Form / thickness | Sheet < 6 mm · plate ≥ 6 mm (catalogue convention) · coil (a delivery form) |
| Finish | 2B · No.1 · No.4 · BA (surface finishes) |
| Condition | Hot-rolled · cold-rolled · annealed · normalised · normalised & tempered (delivery, not finish) |
| Size range | 0.4 – 100 mm thick (family envelope; by material & form) |
| Material specifications | ASTM A240, A516 / A387 (general req. A20), A36 · EN 10025 / 10028 |
| Testing | Impact (PV plate) · UT (A578) where specified |
| Documentation | EN 10204 3.1 / 3.2, PMI, TPI |
How it is made
Flat-rolled product is hot-rolled from slab and, for thinner gauges, cold-rolled and annealed. Stainless is solution annealed and pickled (No.1), or cold-rolled to 2B / BA / No.4 finishes; carbon pressure-vessel plate (A516) is supplied as-rolled, normalised or normalised & tempered, with Charpy impact testing where the grade, thickness or order requires; Cr-Mo plate (A387) is normalised & tempered, with grade- and class-specific heat treatment (Grade 91 requires closely controlled tempering). Plate is ultrasonically examined to ASTM A578 at the agreed acceptance level where the code or client requires; coil is supplied mill-edge or slit to width for downstream blanking and forming.
Grades & materials
Representative flat-product grades, with representative chemistry. Exact grade, class, condition and finish are confirmed per order; availability is by verified capability, and 2205 (S31803 / S32205) dual certification is confirmed against the order, not assumed.
| Material family | Grades | UNS | Standard | Service |
|---|---|---|---|---|
| Austenitic stainless | A240 304/304L/304H, 316/316L, 321, 310S, 317L | — | ASTM A240 | Corrosion |
| Duplex / super duplex | A240 S31803, S32205, S32750 (2507) | — | ASTM A240 | Chloride / sour |
| Carbon PV plate | A516 Gr.55/60/65/70 | — | ASTM A516 | Pressure vessels |
| Cr-Mo alloy plate | A387 Gr.11 / 12 / 22 / 5 / 9 (Cl.1 / 2), Gr.91 (Cl.2) | — | ASTM A387 | High-temperature |
| Carbon structural | A36 · S275 / S355 | — | ASTM A36 / EN 10025 | Structural |
| Nickel alloys | 625 (N06625), C-276 (N10276) | — | ASTM B443 (625) / B575 (C-276) | Severe corrosion |
Chemical composition (representative)
| Grade | C | Mn | Si | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|
| A240 304L | 0.030 max | 2.00 max | 0.75 max | 18.0–20.0 | 8.0–12.0 | — | N 0.10 max |
| A240 316L | 0.030 max | 2.00 max | 0.75 max | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 | N 0.10 max |
| A240 S32205 | 0.030 max | 2.00 max | 1.00 max | 22.0–23.0 | 4.5–6.5 | 3.0–3.5 | N 0.14–0.20 |
| A516 Gr.70 | 0.27 max | 0.85–1.20 | 0.15–0.40 | — | — | — | — |
| A387 Gr.22 | 0.05–0.17 | 0.30–0.60 | 0.50 max | 2.00–2.50 | — | 0.90–1.10 | — |
| A387 Gr.91 | 0.08–0.12 | 0.30–0.60 | 0.20–0.50 | 8.0–9.5 | 0.40 max | 0.85–1.05 | V 0.18–0.25, Nb 0.06–0.10, N 0.03–0.07 |
Standards & specifications
Dimensional & product
- ASTM A480 stainless flat-rolled; A6 carbon structural plate; A20 carbon & alloy PV plate
- ASTM A240 stainless/duplex plate & sheet
- ASTM A516 carbon PV plate; A387 Cr-Mo plate
- ASTM A36 / EN 10025/10028 structural / PV
Finish, form & test
- Sheet finishes 2B / No.1 / No.4 / BA; plate delivered HR / N / N&T (condition, not finish)
- Coil slit or mill-edge to width
- Impact testing for PV plate by grade, thickness & order
- UT to ASTM A578 at an agreed acceptance level where required
Mechanical properties (representative grades)
Representative grades — full MTC values on request. Values are ASTM specification minima or ranges at room temperature; yield and elongation vary with the thickness band and delivery condition and are confirmed on the MTC.
| Grade | Type | Tensile (MPa) | Yield min (MPa) | Elong min (%) | Notes |
|---|---|---|---|---|---|
| A240 304 / 304H | Austenitic SS | 515 | 205 | 40 | ≤ 201 HBW |
| A240 304L | Austenitic SS | 485 | 170 | 40 | ≤ 201 HBW |
| A240 316 | Austenitic SS | 515 | 205 | 40 | ≤ 217 HBW |
| A240 316L | Austenitic SS | 485 | 170 | 40 | ≤ 217 HBW |
| A240 321 | Austenitic SS | 515 | 205 | 40 | ≤ 217 HBW |
| A240 310S | Austenitic SS | 515 | 205 | 40 | ≤ 217 HBW |
| A240 317L | Austenitic SS | 515 | 205 | 40 | ≤ 217 HBW |
| A240 S31803 (2205) | Duplex | 620 | 450 | 25 | ≤ 293 HBW |
| A240 S32205 (2205) | Duplex | 655 | 485 | 25 | ≤ 293 HBW |
| A240 S32750 (2507) | Super duplex | 795 | 550 | 15 | ≤ 310 HBW |
| A516 Gr.55 | Carbon PV | 380–515 | 205 | 27 | Charpy per order |
| A516 Gr.60 | Carbon PV | 415–550 | 220 | 25 | Charpy per order |
| A516 Gr.65 | Carbon PV | 450–585 | 240 | 23 | Charpy per order |
| A516 Gr.70 | Carbon PV | 485–620 | 260 | 21 | Charpy per order |
| A387 Gr.11 Cl.2 | 1¼Cr-½Mo | 515–690 | 310 | 22 | N & T |
| A387 Gr.22 Cl.2 | 2¼Cr-1Mo | 515–690 | 310 | 18 | N & T |
| A387 Gr.91 | 9Cr-1Mo-V | 585–760 | 415 | 18 | N & T |
| A36 | Carbon structural | 400–550 | 250 | 23 | — |
Testing, inspection & documentation
| Test / document | Detail |
|---|---|
| Chemical / PMI | Composition to the spec; PMI on stainless/alloy |
| Tensile | Tensile, yield and elongation per grade |
| Impact (Charpy) | Pressure-vessel plate (A516) and where specified |
| Hardness | Brinell/Rockwell per grade |
| Ultrasonic | Plate UT to ASTM A578 at the agreed acceptance level where required |
| Dimensional / identity | Thickness, flatness, surface & heat / plate / coil identity |
| Corrosion | IGC susceptibility per the specified ASTM A262 practice (austenitic); duplex phase test where specified |
| Certification | EN 10204 3.1 as standard; 3.2 where the contracted inspection responsibilities are met |
Applications & industries served
Available forms, sizes & range
Standard forms and the family supply envelope. Exact form, grade / class, thickness × width × length (or coil dimensions), finish and condition are confirmed per order; the range below is by material and form.
| Parameter | Range |
|---|---|
| Forms | Sheet · plate · coil |
| Finish | 2B · No.1 · No.4 · BA (finish); HR / cold-rolled (process) |
| Thickness | 0.4 – 100 mm (by material & form) |
Frequently asked questions
What is the difference between sheet and plate?
As a catalogue convention, sheet is generally under 6 mm with finished surfaces and plate is 6 mm and above; the exact boundary and form definition depend on the standard, width and manufacturing route. Coil is a delivery form, not a separate grade.
What finishes and delivery conditions do you supply?
Stainless sheet in 2B, No.1, No.4 and BA surface finishes. Hot-rolled and cold-rolled are processing routes, and annealed, normalised or normalised & tempered are delivery conditions — these are separate from the surface finish and are confirmed per order.
Which pressure-vessel plate do you supply?
ASTM A516 carbon and A387 Cr-Mo plate, ordered under the A20 general requirements, with impact testing and ultrasonic examination (A578) where the grade, thickness, code or order requires. A387 Grade 91 is supplied as Class 2 with closely controlled heat treatment.
Is all thick plate pressure grade?
No. Whether a plate meets a pressure-vessel specification depends on the ordered material, general requirements and delivery / test conditions, not thickness alone. Structural plate (A36, EN S275 / S355) and pressure-vessel plate (A516 / A387) are ordered to different specifications.
Is 2205 duplex a single grade?
‘2205’ covers both UNS S31803 and the tighter S32205 chemistry. They are separate specifications, so dual S31803 / S32205 certification is confirmed against the order rather than assumed.
How is sheet or plate weight calculated?
Theoretical mass uses the grade's density: kg/m² = density (kg/m³) × thickness (mm) ÷ 1000, and kg/piece = density × thickness × width × length ÷ 10⁹ with dimensions in mm. Use the grade's own density — 7.85 g/cm³ is not correct for every stainless or nickel alloy — and note that thickness tolerance, edge losses and packing affect the actual and shipped mass.
Request a quote
Send your requirement to Sagiant Piping Industries and our team responds with grade, material selection, availability and pricing for sheets, plates & coils. Attach a BOQ, line list or drawing for a faster, more accurate quotation.
- Fast RFQ response with grade & material-selection support
- EN 10204 3.1 / 3.2 certification, PMI & third-party inspection
- BOQ & line-list project supply — India & export
Mechanical & chemical values shown are ASTM/ASME specification figures; certified heat-specific values appear on the MTC. Availability is confirmed with the quotation.
