Carbon Steel RFQ Pathways
Move from this material family overview to the right grade, product form, technical resource or quotation path without changing the page's primary supplier intent.
Carbon Steel A36, 1018, 1045 & A516 Gr 70 Supplier in India
Rubinox Metal and Alloys supports carbon steel enquiries for plates, sheets, pipes, tubes, flanges, fittings, fasteners, bars, rods, angles, channels, flats, circles and wire mesh. This page is built for buyers sourcing ASTM A36, SAE 1018, SAE 1045 and ASTM A516 Grade 70 for structural fabrication, machining, pressure vessel plate and project procurement.
Stockist | Supplier | Importer | ExporterA36 | 1018 | 1045A516 Gr 70Plates | Pipes | Bars | Structural FormsPAN India & Export Enquiries
Common Carbon Steel Grades
- ASTM A36: structural carbon steel for plates, sections, frames and fabrication
- SAE 1018: low carbon steel for machining, rods, bars and general engineering
- SAE 1045: medium carbon steel for shafts, pins, gears and higher-strength parts
- ASTM A516 Grade 70: pressure vessel plate grade for boiler, tank and equipment requirements
- ASTM A106 Grade B Pipe : seamless carbon steel pipe enquiries for process and elevated-temperature service where specified
- ASTM A53 Grade B Pipe : carbon steel pipe enquiries with type, schedule, end finish and documentation details
- ASTM A333 Grade 6 Pipe : low-temperature carbon steel pipe enquiries where impact requirements are specified
- ASTM A335 P11 , P22 and P91: alloy steel pipe RFQs for high-temperature project requirements
- API 5L Grade B , X52 and X65: line pipe enquiries with PSL, coating and inspection details
- 1095 and other high carbon grades: reviewed only when buyer specification, form and quantity are clearly shared
Typical Applications
- Structural fabrication, frames, base plates, supports and infrastructure items
- Machined components, shafts, pins, bushes, spacers and engineering parts
- Industrial piping, general fabrication, flanges, fittings and fasteners where specified
- Boilers, pressure vessels, tanks and process equipment plates where A516 Grade 70 is specified
- Maintenance, EPC, construction, fabrication and machinery procurement
Carbon Steel Grade Comparison Guide
Use this guide for RFQ preparation only. Final grade selection should follow drawing, design load, mechanical properties, chemistry, fabrication route, pressure service and end-user specification.
| Grade | Common buyer reason | Typical forms | RFQ note |
|---|---|---|---|
| ASTM A36 | Structural fabrication and general steelwork | Plates, sheets, angles, channels, flats and bars | Share thickness, width, length, section size, quantity, cutting and inspection needs. |
| SAE 1018 | Machining, cold-finished bars and general engineering | Round bars, rods, flats, squares, hex bars and machined blanks | Confirm diameter, tolerance, finish, condition and machining allowance. |
| SAE 1045 | Higher-strength shafts, pins, gears and machined parts | Rounds, rods, bars, flats, forged or machined blanks where specified | Mention heat treatment, hardness, UT, tolerance and drawing requirements where applicable. |
| ASTM A516 Grade 70 | Pressure vessel and boiler quality plate requirements | Plates, cut plates and project plate sizes | Share thickness, plate size, normalized condition, impact test and inspection requirements. |
Product Forms Availability Matrix
| Form | Common carbon steel enquiries | Buyer note |
|---|---|---|
| Plates and sheets | A36 structural plate, A516 Grade 70 pressure vessel plate, cut plates and fabrication sheets | Share thickness, width, length, standard, condition and cutting requirement. |
| Pipes and tubes | Carbon steel pipe and tube enquiries for industrial, fabrication and project use | Confirm OD, wall thickness or schedule, length, grade, end finish and standard. |
| Bars and rods | 1018 and 1045 round bars, rods, flats, square bars and hex bars | Share diameter, size, length, finish, tolerance and condition. |
| Angles, channels and flats | A36 and project-specified structural forms | Confirm section size, length, quantity and drawing or BOQ reference. |
| Flanges, fittings and fasteners | Project-specified carbon steel connection items | Mention rating, schedule, type, standard, coating and documentation requirement. |
Standards and Inspection Guidance
- Common references include ASTM A36, ASTM A29/A108 for bars where applicable, ASTM A516/A516M for pressure vessel plate and buyer project specifications.
- For pipes, tubes, fittings or flanges, state the exact ASTM, ASME, EN, DIN, IS or project standard required.
- Equivalent references such as IS or EN grades should not be treated as automatic substitutes without buyer approval.
- State MTC, PMI, UT, impact testing, dimensional inspection, marking and packing requirements at enquiry stage.
Carbon Steel vs Mild Steel vs Stainless Steel
Carbon steel is selected by grade and carbon/mechanical property requirement, mild steel is often used as a broader low-carbon fabrication term, and stainless steel is selected when corrosion resistance is a primary design factor. Buyers should confirm whether the RFQ requires carbon steel, mild steel, stainless steel or a specific standard such as A36, A516 Grade 70, IS 2062, EN S275, 1018 or 1045.
Buyer Specification Guide
| Requirement | Details to share |
|---|---|
| Grade and standard | ASTM A36, SAE 1018, SAE 1045, ASTM A516 Grade 70, IS/EN/DIN reference or project specification. |
| Product form | Plate, sheet, pipe, tube, bar, rod, flat, angle, channel, flange, fitting, fastener, circle or machined blank. |
| Dimensions | Thickness, width, length, OD, wall thickness, schedule, diameter, section size, tolerance and finish. |
| Condition | Hot rolled, cold finished, normalized, heat-treated, cut-to-size, machined or project-specified condition. |
| Documentation | MTC, PMI, UT, impact testing, third-party inspection, marking, packing or traceability where applicable. |
| Delivery | Delivery city, project site, dispatch timeline or export destination. |
RFQ Checklist
- Grade and specification: A36, 1018, 1045, A516 Grade 70 or project grade
- Product form and complete dimensions
- Quantity, lengths, plate sizes or BOQ/MTO line items
- Condition, tolerance, finish and processing requirement
- MTC, PMI, inspection, UT, impact test or packing requirement
- Delivery location and timeline
Internal Linking Opportunities
Carbon Steel Supply FAQs
Which carbon steel grades does Rubinox handle?
Rubinox handles carbon steel enquiries for grades such as ASTM A36, SAE 1018, SAE 1045 and ASTM A516 Grade 70. Buyers should share grade, standard, product form, dimensions, quantity and delivery location.
What is the difference between A36, 1018, 1045 and A516 Grade 70?
A36 is commonly reviewed for structural fabrication, 1018 for machining and general engineering, 1045 for higher-strength shafts and parts, and A516 Grade 70 for pressure vessel plate when specified.
Which carbon steel grade is used for structural fabrication?
ASTM A36 is commonly specified for structural plates, angles, channels, base plates and fabricated frames. Final selection should follow the drawing, design load, standard and project specification.
Which carbon steel grade is used for machining?
SAE 1018 is often reviewed for general machining and cold-finished bars, while SAE 1045 is reviewed for higher-strength machined parts. Confirm chemistry, mechanical properties, heat treatment and dimensional tolerance in the RFQ.
Which carbon steel grade is used for pressure vessel plates?
ASTM A516 Grade 70 is commonly specified for pressure vessel plate. Buyers should share plate thickness, width, length, normalized condition, impact testing and inspection requirements where applicable.
What details are needed for a carbon steel quotation?
Share grade, standard, product form, size, thickness, schedule, diameter, length, quantity, finish or condition, inspection requirement and delivery location. Drawings or BOQ files help for project enquiries.
Can buyers request MTC, inspection or cutting support?
Buyers can mention MTC, PMI, dimensional inspection, third-party inspection, cutting, marking and packing requirements in the RFQ. Documentation and processing support is reviewed where applicable and as per requirement.
Can carbon steel grades be substituted?
Equivalent or alternate grades should be used only when approved by the buyer, project engineer or end user. Mechanical properties, chemistry, standard, heat treatment and application duty should be checked first.
Can Rubinox review IS 2062 or EN S275 as carbon steel alternatives?
Rubinox can review IS 2062 or EN S275 enquiries as related structural steel references, but they should not be treated as automatic alternatives to ASTM A36, SAE 1018, SAE 1045 or A516 Grade 70. Buyers should share the governing standard, grade, mechanical requirement and approval status.
Buyer Details to Confirm
Share standard, grade, form, dimensions, mechanical or pressure requirement, quantity, inspection scope and delivery location.
- Use the linked grade or specification pages when a project document names a grade.
- Use product form links when size, thickness, schedule, class or drawing details drive the enquiry.
- Request MTC, PMI, inspection or packing support at RFQ stage where applicable.
Related Guides and Resources
Use these Knowledge Hub and technical links to prepare a clearer enquiry before sharing quantity and destination details.
Safe Supply and Documentation Notes
- Rubinox reviews enquiries as a stockist, supplier, importer, exporter and project supplier for industrial metal RFQs.
- Final material suitability should follow buyer drawings, end-use conditions, standards and project engineer approval.
- PAN India supply and export enquiry support depend on grade, form, quantity, documents and logistics details.
Procurement RFQ support
Share Your Carbon Steel Requirement
Share grade or specification, product form, size, quantity, standard, MTC/PMI or inspection needs, delivery location and timeline for Rubinox quotation support.
Grade / specification
Product form and size
Quantity and standard
Delivery location
MTC / inspection needs
Drawing or BOQ if any