SA-387 Gr 11 Cl 2 Boiler-quality PlateASTM A387 · ASTM A20 · Manufacturer, trader & exporter, India
ASTM A387 Gr 11 Cl 2 · 1¼Cr-½Mo plate
An SA-387 Gr 11 Cl 2 boiler-quality plate is pressure-vessel plate for boilers and vessels, made from SA-387 Gr 11 Cl 2 to ASTM A387 Gr 11 Cl 2 · ASME SA-387. Boiler-quality (BQ) plate is carbon or chrome-moly steel plate made to pressure-vessel specifications, with controlled chemistry and tested properties.
- ASTM A387
- ASTM A20
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is an SA-387 Gr 11 Cl 2 Boiler-quality Plate?
- What it is
- Pressure-vessel plate for boilers and vessels
- Material
- ASTM A387 Gr 11 Cl 2 · ASME SA-387
- Dimensions
- ASTM A20
- Grade
- SA-387 Gr 11 Cl 2
- Best at
- Hot, high-pressure reactors and heat exchangers
SA-387 Gr 11 Cl 2 Boiler-quality Plate Specification
| Product | SA-387 Gr 11 Cl 2 Boiler-quality Plate |
|---|---|
| Material standard | ASTM A387 Gr 11 Cl 2 · ASME SA-387 |
| Dimensional standard | ASTM A20 |
| Thickness | 4.76 mm (3/16") and up |
| Size | Mill plates or cut to drawing |
| Testing | Chemical & mechanical per heat · NDT · impact where specified |
| Documents | EN 10204 3.1 or 3.2 on request / as specified in the PO |
When to Choose a Boiler-quality Plate
Boiler-quality (BQ) plate is carbon or chrome-moly steel plate made to pressure-vessel specifications, with controlled chemistry and tested properties.
- SA-516, SA-387 and similar
- Normalised on request
- UT and impact tests
More on choosing: Boiler-quality plate guide.
SA-387 Gr 11 Cl 2 Boiler-quality Plate: Why 387-11 for boiler-quality plates
Boiler-quality (BQ) plate is carbon or chrome-moly steel plate made to pressure-vessel specifications, with controlled chemistry and tested properties. In SA-387 Gr 11 Cl 2, the choice usually comes down to the medium and temperature — the rows here are the points buyers check for this exact combination.
| Why this grade | Carbon and low-alloy plate is the workhorse of pressure vessels and structures. SA-387 Gr 11 Cl 2 is picked for hot, high-pressure reactors and heat exchangers. |
|---|---|
| Typical service | Refineries — Hydroprocessing reactors. |
| Matching filler | ER80S-B2 / E8018-B2 |
SA-387 Gr 11 Cl 2 Boiler-quality Plate Chemical Composition
Under technical review for TDS.
| Element | Current requirement |
|---|---|
| Chromium | As specified |
| Molybdenum | As specified |
| 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 A387 Grade 11.
SA-387 Gr 11 Cl 2 Boiler-quality 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 A387 Grade 11 — Class 2.
Full chemistry, properties and equivalents are on the SA-387 Gr 11 Cl 2 grade page.
SA-387 Gr 11 Cl 2 Boiler-quality Plate — questions buyers ask
What is BQ plate?
Boiler-quality plate — pressure-vessel steel such as SA-516 Gr 70, certified for boilers and vessels.
Which standard covers SA-387 Gr 11 Cl 2 boiler-quality plates?
The material is ASTM A387 Gr 11 Cl 2 · ASME SA-387; dimensions follow ASTM A20. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a SA-387 Gr 11 Cl 2 boiler-quality plate?
The steel price, the size and dimensions, quantity, and the testing and documents required. Send your list and we quote the same working day.
What documents do you supply?
EN 10204 3.1 or 3.2 certificates available on request / as specified in the PO; dimensional reports as required. PMI can be arranged depending on product and requirements, as specified in the PO.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026