Section and TMT table verification — 6 November 2026
The ISMB/ISMC calculator now defaults to IS 808:2021. Historical 1989 and producer values remain individually labelled. International rows identify the catalogue and region; they are not automatic structural equivalents. TMT calculations use the selected published nominal-mass table, including the 45 mm and 50 mm sizes added by Amendment 1 to IS 1786:2008. A draft revision is not treated as a published standard. Known source inconsistencies are shown beside affected rows.
Indian sections · International sections · TMT bars
Who publishes this information?
The publisher is Steel Impex India, a Mumbai industrial metal stockist and supplier established in 1989. The catalogue, grade references and calculators help buyers prepare complete material enquiries. They do not replace the governing standard, the material certificate or an engineering approval.
Tables identify their reference basis where available. A source reference applies to the stated dataset or product scope; it is not a claim that every requirement in the full standard has been checked.
Weight calculations: method and assumptions
The general relationship is mass = volume × density. Dimensions are converted to millimetres internally. With volume in mm³ and density in g/cm³, weight in kilograms is volume × density ÷ 1,000,000.
Geometry used for common product forms| Form | Cross-sectional area, mm² | Dimensions in mm |
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| Round bar | π × d² ÷ 4 | d = diameter |
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| Sheet, plate or flat | w × t | w = width; t = thickness |
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| Round pipe | π × [OD² − (OD − 2t)²] ÷ 4 | OD = outside diameter; t = wall |
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| Hexagonal bar | √3 × AF² ÷ 2 | AF = distance across flats |
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| Ring or circle | π × (OD² − ID²) ÷ 4 | Multiply area by thickness; ID = 0 for a solid circle |
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Multiply cross-sectional area by length in mm to obtain volume. For kg/m, use area × density ÷ 1,000. Density values are estimates for the selected material. Actual weight can vary with chemistry, thickness, corner radii, tolerances, finish and coatings.
Angle and channel geometry is simplified. Use the published section-weight tables for the specified rolled section. Perforated and chequered material require the actual pattern and base-thickness information; a plain sheet estimate is not its guaranteed finished weight.
OPEN THE WEIGHT CALCULATOR ↗
Grade references and MTC screening
Similar chemical compositions do not establish that two materials are interchangeable. Check the product form, standard edition, grade suffix, thickness range, delivery condition, heat treatment, mechanical tests and order requirements.
The MTC checker screens the values you enter against the toolkit’s available reference limits. A match is not a certificate of conformity. Missing tests, condition-specific requirements and product-analysis tolerances may need separate review.
EN 10204 describes inspection-document types; it does not specify the steel grade. A 3.1 certificate includes results of specific inspection and is validated by the manufacturer’s authorized representative independent of manufacturing. Type 3.2 additionally involves the purchaser’s authorized representative or an inspector designated by regulations. Specify the required document before ordering, and match its identification to the supplied material. BSSA: EN 10204 inspection certificates.
Check the controlling source
Use the edition required by your contract. A newer edition does not automatically replace the edition specified in an existing order. The site’s update date is not a declaration that every standard has been republished or reverified on that date.
Report a correction
Use “Report an error” inside the toolkit, or email sanjay@steelimp.com. Include the page URL, grade or size, value in question, proposed correction, and the source document with its edition and table number. Avoid including confidential customer information.
For pressure, structural, corrosion or other service-critical decisions, obtain the necessary review from the responsible engineer. The calculators support estimates and comparisons; they do not approve a design.
