Plates
Heavier plate (6 mm and above) for pressure vessels, structures and fabrication — carbon (A516), alloy (A387), stainless and duplex.
Technical specification
| Parameter | Specification |
|---|---|
| Product | Flat-rolled sheet, plate & coil |
| Dimensional standard | ASTM A480 (SS) · A6 (carbon/alloy plate) |
| Form / thickness | Sheet < 6 mm · plate ≥ 6 mm · coil |
| Finish | 2B · No.1 · No.4 · BA · HR · N · Q&T |
| Size range | 0.4 – 100 mm thick |
| Material specifications | ASTM A240, A516, A387, A36 · EN 10028 / 10025 |
| 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; Cr-Mo plate (A387) is normalised & tempered. Plate is ultrasonically examined to ASTM A578 where the code or client requires; coil is supplied mill-edge or slit to width for downstream blanking and forming.
Grades & materials
All grades supplied for this product family, with representative chemistry. Exact grade, class and condition are confirmed per order.
| 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 (2205), 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.11/12/22/5/9/91 Cl.1/2 | — | ASTM A387 | High-temperature |
| Carbon structural | A36 · S275 / S355 | — | ASTM A36 / EN 10025 | Structural |
| Nickel alloys | B443/B575 (625, C-276) | — | ASTM | 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/Nb/N |
Standards & specifications
Dimensional & product
- ASTM A480 stainless flat-rolled; A6 carbon 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 2B/No.1/No.4/BA; plate HR/N/QT
- Coil slit or mill-edge to width
- Impact testing for PV plate
- UT to ASTM A578 where required
Mechanical properties (representative grades)
Representative grades — full MTC values on request. Values are ASTM/ASME specification minima or ranges at room temperature.
| 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 / 316H | 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 where required |
| Corrosion | IGC per ASTM A262 (austenitic) where specified |
| Certification | EN 10204 3.1 as standard; 3.2 with third-party endorsement |
Applications & industries served
Available forms, sizes & range
Provide with your enquiry
- Thickness, width and length (or coil weight).
- Material grade and finish.
- Edge (mill/slit) and surface protection.
And the commercial detail
- Standard and edition.
- Required tests (PMI, impact, UT).
- Quantity and any drawing or BOQ.
Frequently asked questions
Which plate grade for a pressure vessel?
ASTM A516 (Gr.60/70) carbon and A387 Cr-Mo alloy are the common pressure-vessel plate grades, with A240 stainless/duplex for corrosion service — supplied with impact testing where required.
What thickness range?
From 6 mm upward, hot-rolled, normalised or quenched-and-tempered per grade, cut or profiled to order.
Is ultrasonic testing available?
Yes — UT to ASTM A578 (or the specified level) for plate where the code or client requires it.
Request a quote
Send your requirement to Sagiant Piping Industries and our team responds with grade, material selection, availability and pricing for plates. 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.
