Boiler Quality Plate Supplier in Mumbai
Chiranjiv Steel Centre is a boiler quality plate supplier in Mumbai, India. We have supplied steel since 2000 and hold around 2,000 tonnes of ready stock across our range. Our boiler quality material is stocked in 3 mm to 20 mm thickness. Thicknesses above 20 mm and up to 100 mm are available on order. Stock widths are 1250 mm and 1500 mm. Stock lengths are 5000 mm and 6300 mm.
BQ (Boiler Quality) steel plates are produced to specifications such as ASTM A516, ASTM A515, ASTM A537, IS 2002, IS 2041 and EN 10028-2. Our stock is ASTM A516 Grade 70 / ASME SA-516 Grade 70, intended for welded pressure vessels where improved notch toughness is important. It is used for pressure-retaining equipment in boiler plants where the design temperature suits a moderate and lower-temperature grade, subject to the governing design code.
Boiler Quality Plate Specification
We stock boiler quality plate to ASTM A516 Grade 70, dual certified to ASME SA-516 Grade 70. The table below sets out the supply range we can confirm. Ready stock is subject to a live quantity check when we prepare the quotation.
| Parameter | Detail |
|---|---|
| Product | Boiler quality plate / BQ plate |
| Specification and grade | ASTM A516 / ASME SA-516 Grade 70 |
| Ready-stock thickness | 3 mm to 20 mm |
| On-order thickness | Above 20 mm and up to 100 mm |
| Widths | 1250 mm and 1500 mm |
| Lengths | 5000 mm and 6300 mm |
| Certification | EN 10204 Type 3.1 mill test certificate |
Send the required grade, thickness, width, length, quantity and delivery location for a current offer.
Boiler Quality Plate Equivalent Grades & Designations
BQ plate is covered by the ASTM A515, A516, A537, A285 and A387 families in the USA, IS 2002 and IS 2041 in India, EN 10028-2 in Europe, DIN 17155 (withdrawn) in Germany and JIS G 3118 in Japan. These are cross-reference designations, not exact equivalents. Check your design code before substituting.
| Country / standard | Designation family |
|---|---|
| USA (ASTM / ASME) | ASTM A515 / ASME SA-515 Gr. 60, 65, 70; ASTM A516 / ASME SA-516 Gr. 55, 60, 65, 70; ASTM A537 / ASME SA-537 Cl. 1; ASTM A285 / ASME SA-285 Gr. C; ASTM A387 / ASME SA-387 (chromium-molybdenum alloy steel) |
| India (IS) | IS 2002 Gr. 1, 2, 3; IS 2041 R220, R260, R275, R355, H235, H265, H295, H355 |
| Europe (EN) | EN 10028-2: P235GH, P265GH, P295GH, P355GH (non-alloy grades); alloy grades such as 16Mo3 and 10CrMo9-10 are also covered by the same standard |
| Germany (DIN) | DIN 17155 HI, HII, 17Mn4, 19Mn6 — withdrawn and superseded by EN 10028-2 |
| Japan (JIS) | JIS G 3118 SGV410, SGV450, SGV480 — carbon steel plates for pressure vessels for intermediate and moderate temperature service |
Boiler Quality Plate Sizes
Stock plates are held in 1250 mm and 1500 mm widths and 5000 mm and 6300 mm lengths. Cut-to-size and cut-to-length are available from these sizes.
| Size | Supply status | Enquiry action |
|---|---|---|
| 3 mm to 20 mm THK | Ready stock | We confirm current stock quantity |
| >20 mm to 100 mm THK | Available on order | We confirm availability and timing |
Send sizes in millimetres and tell us the quantity you need. This helps us separate ready-stock items from material that must be sourced on an order basis.
Thin Plate Sizes and Tolerances
ASTM A20/A20M and ASME SA-20/SA-20M are the general requirements standards for pressure vessel plate. For plates wider than 1200 mm, their commonly available size table starts at 4.6 mm thickness. Both of our stock widths, 1250 mm and 1500 mm, are wider than 1200 mm, and our stock starts at 3 mm, so our thinnest plates fall below the thickness listed in A20.
This does not rule the material out. The same standard states that permitted variations for other sizes are subject to agreement between the purchaser and the manufacturer or processor. In practice, the tolerance on our thinnest plate is agreed when the order is placed rather than taken from the published tables. Please include your required tolerance in the enquiry.
Boiler Plate Steel Grades
We supply boiler plate steel grade ASTM A516 Gr. 70 for moderate and lower-temperature vessels. Other grades used for boiler steel plate include A515 Gr. 60/65/70 for intermediate and higher-temperature service, A537 Cl. 1 heat-treated plate, and Indian grades under IS 2002 and IS 2041.
ASTM / ASME Grades
ASTM A516 / ASME SA-516 Gr. 55, 60, 65, 70. Carbon steel plate for moderate and lower-temperature pressure-vessel service. The steel is killed and made to fine austenitic grain size practice. We supply Grade 70 plates dual certified to ASTM A516 / ASME SA-516.
ASTM A515 / ASME SA-515 Gr. 60, 65, 70. Carbon-silicon plate for intermediate and higher-temperature boiler and pressure-vessel duty. The steel is killed and made to coarse austenitic grain size practice.
ASTM A537 / ASME SA-537 Class 1. Heat-treated (normalized) carbon-manganese-silicon plate for fusion-welded pressure vessels and structures. Classes 2 and 3 are quenched and tempered.
ASTM A285 / ASME SA-285 Gr. C. Carbon steel plate for low and intermediate tensile-strength pressure-vessel duty.
ASTM A387 / ASME SA-387. Chromium-molybdenum alloy steel plate for pressure vessels, used where the design temperature and creep requirements are beyond what plain carbon grades can handle.
Indian Standard (IS) Grades
IS 2002 Gr. 1, Gr. 2, Gr. 3. Plain carbon steel plate for pressure vessels in intermediate and high-temperature service, including boilers. Grade 1 is low tensile, Grade 2 medium tensile and Grade 3 high tensile.
IS 2041 R220, R260, R275, R355, H235, H265, H295, H355. IS 2041:2009 covers plates for fusion-welded pressure vessels for moderate and low temperature service, with room temperature and elevated temperature properties. The R grades are room-temperature quality and the H grades are elevated-temperature quality, each graded by yield-strength level in MPa.
European (EN 10028-2) and DIN Grades
European pressure-purpose grades include EN 10028-2 P235GH, P265GH, P295GH and P355GH, which are the non-alloy grades in that standard. DIN 17155 HI, HII, 17Mn4 and 19Mn6 may appear on legacy drawings; check current requirements against EN 10028-2.
Which Boiler Quality Plate Grade to Specify
Grade selection starts with design temperature, pressure, toughness, heat treatment and governing code. Use this guide to frame the enquiry; final selection rests with the qualified design authority.
| Service duty | Typical family | Enquiry checkpoint |
|---|---|---|
| Moderate or lower-temperature pressure-vessel service | ASTM A516 / ASME SA-516 | Specify grade, thickness, impact requirement and certification |
| Intermediate or higher-temperature boiler service | ASTM A515 / ASME SA-515 | Confirm design temperature and heat-treatment condition |
| Heat-treated plate for fusion-welded vessels and structures | ASTM A537 / ASME SA-537 Cl. 1 | Confirm toughness and normalized condition |
| Low or intermediate tensile-strength vessel duty | ASTM A285 / ASME SA-285 Gr. C | Confirm code acceptance for the intended equipment |
Boiler Quality Plate Delivery Conditions
Boiler grade plate is supplied as rolled, normalized, normalizing rolled, or quenched and tempered, depending on the specification, and can be produced with vacuum-degassed steelmaking practice. State the required condition on the purchase order because it affects properties, inspection and price.
- As-rolled plate where additional heat treatment is not specified. Under ASTM A516 / ASME SA-516, plates 40 mm and under in thickness are normally supplied as rolled, and plates over 40 mm are normalized.
- Normalized or stress-relieved plate where specified. ASTM A516 / ASME SA-516 allows plates 40 mm THK and under to be ordered normalized or stress relieved, or both. Where notch-toughness tests are required on plates 40 mm THK and under, those plates are normalized unless the purchaser specifies otherwise, so state any impact requirement at enquiry.
- Normalizing-rolled plate, where the rolling schedule produces a structure similar to that obtained by a separate normalizing treatment. IS 2002:2009 and IS 2041:2009 both define normalizing rolling and both permit it in place of normalizing, subject to agreement between purchaser and manufacturer. ASTM A516 does not list it as a delivery condition.
- Quenched and tempered (Q&T) plate for specified heat-treated strength and toughness, for example ASTM A537 Class 2 and Class 3. Q&T is not listed as an ASTM A516 delivery condition, although A516 does permit cooling rates faster than still air followed by tempering where the purchaser approves it, in the range 595 to 705 °C (1100 to 1300 °F).
- Vacuum-treated steel, ordered as supplementary requirement S1 of ASTM A20 / ASME SA-20, or S17 for vacuum carbon-deoxidized steel. Both are listed as suitable for ASTM A516 / ASME SA-516. Tighter chemistry is separate: S19, Restricted Chemical Requirements, allows restricted heat and product analysis limits to be specified in the purchase order, and S26 covers low-sulphur steel at 0.010 percent sulphur maximum, but neither is listed as suitable for A516, so they apply only by agreement with the manufacturer. State any restricted-chemistry requirement at enquiry.
Welding qualification, preheat, consumables, post-weld heat treatment and inspection must follow the material specification and the fabrication code.
Boiler Quality Plate Industrial Applications
Our boiler quality plates are used in boilers, pressure vessels, heat exchangers, storage tanks, power plants, refineries, petrochemical plants and shipbuilding, where plate must retain integrity under pressure and elevated temperature.
Power Plants and Boilers
Boiler steel plates are used for drums, pressure-retaining shells and related equipment in thermal power and industrial steam systems.
Refineries and Petrochemical Plants
Refineries and petrochemical plants use pressure-purpose plate in reactors, separators and process vessels.
Pressure Vessels and Heat Exchangers
Fabricators use boiler quality carbon steel plates for vessel shells, heads and heat-exchanger components.
Storage Tanks and Process Equipment
BQ material is used for pressure-rated storage and process equipment when the approved design calls for a pressure-vessel grade.
Shipbuilding and Offshore
Marine and offshore projects use approved pressure-vessel grades in boilers and process modules, subject to classification requirements.
Boiler Quality Plate Price
Boiler quality (BQ) steel plates generally sell for between ₹60 and ₹95 per kilogram in the Indian market, which is roughly ₹60,000 to ₹95,000 per metric tonne. Published rates are indicative only. The rate depends on the grade, thickness, width, length, order quantity, stock status, certification and delivery location.
For an accurate quote, send the exact dimensions, quantity and delivery location. We can then check current stock or order availability against the stated requirement.
Get the Best Price. Tell us your order quantity and destination, and we will price ready-stock and on-order material separately.
Boiler Quality Plate — Frequently Asked Questions
What is a boiler quality plate?
Boiler quality plate is steel plate made for welded boilers and pressure vessels, where strength and notch toughness matter. Notch toughness is the plate’s ability to resist sudden brittle fracture when a notch, weld defect or sharp change of section is present. It is usually verified by Charpy V-notch impact testing.
What is the full form of BQ plate?
The full form of BQ plate is Boiler Quality plate.
Can boiler quality plates be cut to size?
Yes. We supply cut-to-length and cut-to-size plate. Cut faces are supplied as sheared or gas-cut edges. Uncut faces keep the edge the plate was supplied with, which is a mill edge or a universal mill (rolled) edge. Send your cut sizes and required edge condition and we will confirm.
What is the Indian standard for boiler quality plate?
Common Indian designations include IS 2002 Gr. 1, 2 and 3, and IS 2041 R220, R260, R275, R355, H235, H265, H295 and H355. The project specification determines the correct grade.
Which boiler quality plate specification do you supply?
We supply dual-certified ASTM A516 / ASME SA-516 Grade 70.
Do you supply boiler quality plates in Mumbai and other Indian cities?
Yes. Subject to order confirmation, we supply across India, including Mumbai, Pune, Delhi, Chennai, Bangalore, Hyderabad, Coimbatore, Visakhapatnam, Indore, Bhopal, Ahmedabad and Surat.
