SA-516 Gr 70 PlateASTM A516 · Manufacturer, stockist & exporter, India
Also sold as ASTM A516 Gr 70 · Boiler-quality (BQ) plate · Pressure-vessel plate
SA-516 Gr 70 plate is supplied hot rolled to ASTM A516 Gr 70, as full mill plates or cut to your drawing for structural and pressure parts. It is a carbon steel pressure-vessel plate, chosen for boilers, pressure vessels and storage tanks. Kanak Steel & Engineering Co. supplies it with EN 10204 3.1 mill certificates from Mumbai to buyers across India, the Gulf, South-East Asia, South America, Europe, the UK and the USA.
- Stock & mill supply
- EN 10204 3.1 / 3.2
- Mill test certificates
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is SA-516 Gr 70 Plate?
SA-516 Gr 70 plate is a carbon steel pressure-vessel plate supplied as plate to ASTM A516 Gr 70. Buyers specify it for boilers, pressure vessels and storage tanks. It is also sold as ASTM A516 Gr 70, Boiler-quality (BQ) plate, Pressure-vessel plate.
- What it is
- Carbon steel pressure-vessel plate
- Standard
- ASTM A516 Gr 70 · ASME SA-516
- Thickness
- Plate is defined under ASTM A20 by width and thickness — roughly 4.6 mm and over for plate wider than 48"
- Density
- 7.85 g/cm³
- Supplied as
- Hot rolled · as-rolled or normalised · cut to size
- Best at
- Boilers, pressure vessels and storage tanks
SA-516 Gr 70 Plate Specification & Sizes
| Material standard | ASTM A516 Gr 70 · ASME SA-516 · ASME SA-516 |
|---|---|
| General requirements | ASTM A20 — dimensions, tolerances and finishes |
| Grade | SA-516 Gr 70 |
| Thickness | Plate is defined under ASTM A20 by width and thickness — roughly 4.6 mm and over for plate wider than 48" |
| Width × length | 1000 / 1250 / 1500 / 2000 / 2500 mm × up to 6000 mm, or cut to drawing |
| Condition & finish | Hot rolled · as-rolled or normalised · shot-blasted and primed on request |
| Cutting | Cut to size — rectangles, strips, circles & rings |
| Testing | Chemical & mechanical per heat · UT to A435 / A578 · impact tests on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection · packing list · certificate of origin |
SA-516 Gr 70 Plate Cut to Size
Most 516-70 plate leaves us as pieces, not full mill plates. Cutting from a full plate means you pay only for what you use, and each piece keeps the heat number of the plate it came from.
| Full & part plates | Full mill plates, halves and quarters |
|---|---|
| Rectangles & strips | To your list of finished sizes, or to a drawing |
| Circles & rings | Blanks for blind flanges, covers, tube sheets and nozzles |
| Machining allowance | State finished size and allowance; thermally cut edges are normally machined back |
| Traceability | Heat number transferred to every piece before cutting |
Send a cutting list or DXF; we nest pieces to reduce off-cut and quote per piece.
SA-516 Gr 70 Plate Chemical Composition
Under technical review for TDS.
| Element | Current requirement |
|---|---|
| Carbon | As specified |
| Manganese | As specified |
| Silicon | As specified |
| Phosphorus | As specified |
| Sulphur | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification to be verified: ASTM A516 Grade 70.
SA-516 Gr 70 Plate Mechanical Properties
Under technical review for TDS.
| Property | Current requirement |
|---|---|
| Tensile strength | As specified |
| Yield strength | As specified |
| Elongation (50 mm) | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification and condition to be verified: ASTM A516 Grade 70 — condition per order.
Density & Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting range | 1420 – 1530 °C |
| Magnetic | Magnetic |
SA-516 Gr 70 Equivalent Grades
SA-516 Gr 70 Plate Weight Chart & Calculator
Use this to budget freight and price per piece. Weight (kg) = length (m) × width (m) × thickness (mm) × 7.85.
Example: 2000 × 1000 × 10 mm
2.0 × 1.0 × 10 × 7.85 = 157.0 kg
Total weight —
| Thickness | 2000 × 1000 plate | Per m² |
|---|---|---|
| 5 mm | 78.5 kg | 39.3 kg |
| 6 mm | 94.2 kg | 47.1 kg |
| 8 mm | 125.6 kg | 62.8 kg |
| 10 mm | 157.0 kg | 78.5 kg |
| 12 mm | 188.4 kg | 94.2 kg |
| 16 mm | 251.2 kg | 125.6 kg |
| 20 mm | 314.0 kg | 157.0 kg |
| 25 mm | 392.5 kg | 196.3 kg |
Six-digit Harmonized System heading (iron and steel, chapter 72–73). Your country adds its own digits — confirm with your customs broker. All HS codes.
SA-516 Gr 70 Plate Price — What Decides It
Two quotes for "516-70 plate" can differ by 20% and both be fair. We quote 516-70 plate per kg for full sizes and per piece for cut sizes. These six things move the price per kg, so you can compare offers like for like.
SA-516 Gr 70 Plate Testing & Inspection
Plate goes into pressure parts and heavy sections, so it is inspected for internal soundness and flatness as well as chemistry. These tests are added to the order and reported on the certificate or as separate reports.
| Ultrasonic testing | Straight-beam UT to ASTM A435 (A20 supplementary requirement S8) or A578 (levels A, B, C) |
|---|---|
| Flatness & dimensions | Per ASTM A20 tables for thickness, width and length |
| Impact testing | Charpy impact tests at the specified temperature (ASTM A20 supplementary requirement S5) |
| PMI | Alloy verification on each plate, or each cut piece if required |
| Third-party inspection | Witness by your inspector or agency, with an EN 10204 3.2 certificate |
UT checks the plate body along a scan grid and a band along each edge, where laminations matter most for welding.
SA-516 Gr 70 Plate Applications
Plate is chosen for pressure-bearing walls, heavy sections and parts machined from solid.
How your 516-70 plate order runs
- 01Enquiry review — we confirm size, standard edition and documents against your MR or drawing.
- 02Heat selection & PMI — the mill certificate is checked against your order; PMI before processing is available on request.
- 03Processing — cutting to your sizes, with heat numbers transferred to every piece.
- 04Inspection — your third-party inspector witnesses, or we share photos and test reports.
- 05Packing & dispatch — seaworthy packing from Nhava Sheva (JNPT), Mumbai, FOB or CIF, documents sent before the vessel sails.
Fabricating Heavy SA-516 Gr 70 Plate
Shells, heads and tube sheets mean thick sections and multi-pass welds. These are the points that decide whether 516-70 plate keeps its corrosion resistance after fabrication; matching filler is E7018 / ER70S-6.
General guidance only; follow your approved WPS, PQR and design code.
| Preheat | Set by thickness and carbon equivalent per your WPS and code. |
|---|---|
| PWHT | Post-weld heat treatment where the code or service requires it. |
| Joint preparation | Double-V or J-prep on heavy plate to reduce weld volume. |
How to Order SA-516 Gr 70 Plate: RFQ Checklist
Get an accurate quote the first time. Copy this list into your enquiry:
- Standard and edition — e.g. ASTM A516 Gr 70-latest
- Thickness × width × length, and number of pieces
- Full plates or cut pieces (attach drawing)
- Certificate type — 3.1 or 3.2, and the inspection agency
- Extra tests — UT, intergranular corrosion
- Delivery port, Incoterm and required date
SA-516 Gr 70 plate for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiSA-516 Gr 70 plate — questions buyers ask
Is SA-516 Gr 70 the same as ASTM A516 Gr 70?
ASTM A516 Gr 70, Boiler-quality (BQ) plate, Pressure-vessel plate are names used for SA-516 Gr 70, and plate is ordered to ASTM A516 Gr 70 whichever name is on the enquiry.
What thickness counts as SA-516 Gr 70 plate?
For SA-516 Gr 70, plate is defined under ASTM A20 by width and thickness — roughly 4.6 mm and over for plate wider than 48"; thinner material is outside ASTM A20, which covers plate only. Order the form that matches your drawing thickness.
What is the price of SA-516 Gr 70 plate per kg?
It moves with steel mill prices, so a fixed list price is out of date within days. Thickness, cut size, quantity and documents also change it. Send your size and quantity and we quote the same working day.
Do you supply ultrasonically tested SA-516 Gr 70 plate?
Yes, UT can be added to the order — to ASTM A435 or the level your specification states. The UT report is supplied with the mill certificate.
Can SA-516 Gr 70 plate be cut into circles and rings?
Yes. Blanks for blind flanges, covers and tube sheets are cut from plate to your drawing, with the heat number marked on every piece.
What machining allowance should I leave on cut plate?
It depends on the cutting method and finished tolerance. Give us the finished size and your allowance; thermally cut edges are normally machined back to sound metal.
How heavy is a SA-516 Gr 70 plate?
Weight (kg) = length (m) × width (m) × thickness (mm) × 7.85. A 2000 × 1000 × 10 mm plate weighs about 157 kg; use the calculator on this page for your size.
What documents come with an export shipment?
An EN 10204 3.1 mill certificate (or 3.2 with a third-party inspector), commercial invoice, packing list with heat numbers, and certificate of origin. Test reports are added for any extra tests ordered.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026