Navgraha Steels INC supplies pressure-vessel quality steel plates for the fabrication of pressure vessels, process columns, separators, reactors, heat exchangers, tanks and related pressure-containing equipment. The sourcing range covers SA 516 carbon steel, SA 387 chrome-moly alloy steel, 16Mo3, SA 516 Grade 70 NACE and HIC-tested material, together with corrosion-resistant alloy options for applicable process environments.
The correct plate cannot be selected from pressure alone. Send the approved material specification, design temperature, plate thickness, dimensions, quantity, heat treatment, impact requirement, corrosion or sour-service condition, certificate type and delivery destination. Navgraha Steels INC will review the commercial supply requirement; final material approval remains with the responsible designer, fabricator, client or inspecting authority.
| Service or procurement requirement | Relevant material family to review | Important RFQ inputs |
|---|---|---|
| General pressure-vessel and boiler service | SA 516 Grade 60, 70, 415, 485 or approved dual-certified material | Design code, thickness, strength level, impact temperature and heat treatment |
| Sour-service or hydrogen-related exposure | SA 516 Grade 70 NACE and/or HIC-tested plate | Applicable NACE document, HIC method, test solution, acceptance criteria and hardness limits |
| Elevated-temperature refinery or power equipment | SA 387 Grade 11, 22, 91 or 12 Class 2 | Design temperature, class, heat treatment, PWHT and creep-service requirements |
| EN pressure-equipment specification | 16Mo3 where approved | EN standard, delivery condition, temperature range and inspection documentation |
| Severe corrosion or specialised process media | Hastelloy, Inconel or Monel grade selected by the project | Chemical medium, concentration, temperature, pressure and fabrication requirements |
SA 516 grades are commonly specified for welded pressure vessels and equipment operating within the applicable strength, toughness and temperature limits. The Navgraha range includes Grade 60, Grade 70, Grade 60/70 dual certified, Grade 415 and Grade 485.
Links: SA 516 Grade 60 | Grade 70 | Grade 60/70 | Grade 415 | Grade 485 | Boiler Quality Steel
For specified sour-service projects, the order may require NACE-related material controls, HIC testing or both. The required standard, test method, specimen orientation, solution, acceptance values, hardness, heat treatment and reporting format must be defined before sourcing.
Links: SA 516 Grade 70 NACE | SA 516 Grade 70 HIC | HIC & NACE-Tested Steel
For equipment exposed to elevated temperatures or where alloy-steel properties are required, the approved specification may call for SA 387 Grade 11, Grade 22, Grade 91, Grade 12 Class 2 or 16Mo3. These grades have distinct compositions, heat-treatment and fabrication requirements.
Links: SA 387 Grade 11 | Grade 22 | Grade 91 | Grade 12 | 16Mo3 | Alloy & Chrome-Moly Steel Plates
Hastelloy C276/C22, Inconel 625/825 and Monel 400 may be considered for vessel components exposed to specified aggressive process media. Suitability varies with concentration, temperature, contamination, stress and fabrication route and must be approved by the project materials engineer.
| Buying requirement | Supply and ordering considerations |
|---|---|
| Product form | Plate is the principal pressure-vessel form; sheet or coil is reviewed only where the governing specification and manufacturing route permit it |
| Dimensions | Standard mill plates or cut sizes according to grade, thickness, width, length and source availability |
| Material condition | As-rolled, normalised, normalised and tempered, quenched and tempered or another permitted condition as required by the exact grade |
| Toughness | Impact testing at the stated temperature, orientation and acceptance energy when required |
| Internal quality | Ultrasonic examination to the specified method, level and acceptance criteria when ordered |
| Sour service | NACE, HIC, hardness and chemistry requirements according to the approved project specification |
| Processing | Cutting, profiling, edge preparation, marking and related services where technically feasible |
| Traceability | Heat-number continuity and material-document control according to the agreed processing and inspection plan |
Check that the plate marking, heat number, grade, class, thickness and material condition agree with the purchase order and MTC. Review chemical and mechanical results, heat treatment, impact values, supplementary test reports and inspection releases. Any mismatch, unclear marking or unapproved substitution should be resolved before cutting or welding.
Pressure-vessel steel plates may be specified for:
An application name does not establish suitability. Selection should consider:
Related links: Carbon Steel Plates | Boiler Quality Steel | Alloy & Chrome-Moly Steel | HIC & NACE-Tested Steel
Navgraha Steels INC handles pressure-vessel plate enquiries through available stock, Indian mill sourcing, international mill sourcing and imports, according to the approved grade, plate dimensions, condition, origin, testing, quantity and schedule.
Commercial capabilities include:
Pressure-vessel material procurement typically requires controlled traceability and a defined document package. Requirements must be stated before quotation because they influence material availability, inspection stages, cost and delivery.
Depending on the grade, manufacturer and accepted order scope, documentation may include:
Price depends on the exact material grade, class, plate size, quantity, mill, origin, heat treatment, impact test, UT/HIC requirements, certificate type, third-party inspection, processing, packing and delivery destination.
Provide the following for an accurate quotation:
Navgraha Steels INC accepts requirements from vessel fabricators, equipment manufacturers, EPC contractors and industrial buyers across India and export markets. Export quotations can include agreed product marking, seaworthy packing, commercial and shipping documents, inspection records and freight scope. Taxes, duties, insurance, offer validity and delivery schedule should be stated in the commercial offer.
Upload your RFQ, plate schedule, datasheet or material requisition. Our team will review the grade, dimensions, condition, tests, documents, mill restrictions, processing and destination before providing an applicable offer.
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