Knowledge centre
Resources for steel buyers
Buying guides, standards references and tools for procurement teams, engineers and fabricators — written around what goes into an enquiry and a purchase order.
Buying guides
Procurement and product guides
Procurement guideHow to Write a Steel RFQ That Gets an Accurate QuoteThe information a steel supplier needs to quote accurately — by product type — and the omissions that cause re-quotes and wrong deliveries.Product comparisonHR vs CR Steel — Choosing Between Hot Rolled and Cold RolledWhen to buy hot rolled, pickled & oiled or cold rolled (CRCA) steel — by thickness, surface, tolerance, forming and cost.Product comparisonGP vs Galvalume vs ZAM — Choosing a Metallic CoatingHow galvanized (GP / GI), galvalume (GL / AZ) and zinc-aluminium-magnesium (ZAM) coated steel compare for procurement and specification.Roofing guideTCT vs BMT — Reading Roofing Sheet Thickness CorrectlyWhy two roofing sheet quotations at "0.50 mm" can contain different amounts of steel, and how to compare them.Reference chartPipe NB to OD Chart (IS 1239)Nominal bore to outside diameter for IS 1239 steel tubes, and how NB, OD and class relate when ordering MS and GI pipes.Procurement guidePrimary Producer vs Rolling Mill Sections — What Buyers Should KnowHow structural sections from integrated producers differ commercially from rolling-mill sections, and how to write the requirement.Procurement guideISI Mark, TC and MTC — What They Mean When Buying SteelWhat "ISI & TC" means on a steel indent, how an ISI mark differs from a test certificate or mill test certificate, and how to write documentation requirements into an enquiry.Product comparisonPrimary CR vs Re-rolled CR — What Buyers Should KnowHow cold rolled steel from integrated producers differs from re-rolled CR from secondary re-rollers, and how to specify the one your application needs.Product comparisonMagnelis vs PosMAC vs Magsure — ZAM Brands ComparedHow the zinc-aluminium-magnesium (ZAM) coated steels sold by AM/NS India, POSCO, JSW, Tata Steel and Dongkuk relate to each other, and when a switch between them needs approval.Product comparisonISI Pipes vs Patra Pipes — What's the Difference?What "patra" pipes are, how they differ from ISI-marked pipes and hollow sections, and where each can and cannot be used.
Standards
Indian Standards reference
How the main IS standards for steel products are structured, and what to state on a purchase order.
IS 2062Hot rolled medium and high tensile structural steelIS 1079Hot rolled carbon steel sheet, plate and stripIS 2002Steel plates for pressure vessels, including boilersIS 513Cold reduced carbon steel sheet and stripIS 277Galvanized steel strip and sheets (plain and corrugated)IS 15961Hot-dip aluminium-zinc (galvalume) coated steel strip and sheetIS 18513Hot-dip zinc-aluminium-magnesium (ZAM) coated steelIS 15965Colour-coated / pre-painted aluminium-zinc (PPGL) steelIS 14246Continuously pre-painted galvanized (PPGI) steel sheet and stripIS 808Dimensions for hot rolled steel beam, column, channel and angle sectionsIS 4923Hollow steel sections for structural useIS 1161Steel tubes for structural purposesIS 1239 (Part 1)Steel tubes, tubulars and other wrought steel fittings — mild steel tubesIS 3589Steel pipes for water and sewage (larger diameters)IS 6911Stainless steel plate, sheet and strip
Weight charts
Steel weight charts (kg/m)
Sizes and weight per metre for sections, bars, hollow sections, pipes and plates.
Weight chartMS Angle Weight Chart — Equal Angles (kg/m)MS angle weight per metre for equal angles from 20 × 20 × 3 to 200 × 200 × 16 mm, with trade sizes (40×5, 50×5, 75×6) and 6 m length weights.Weight chartISMC Channel Weight Chart (kg/m)ISMC channel sizes and weight per metre from ISMC 75 to ISMC 400 — depth × flange width, kg/m and weight per 6 m and 12 m length.Weight chartISMB Beam Weight Chart (kg/m)ISMB beam sizes and weight per metre from ISMB 100 to ISMB 600 — depth × flange width, kg/m and weight per 6 m and 12 m length.Weight chartMS Flat Weight Chart (kg/m)MS flat bar weight per metre for widths 20 to 100 mm and thicknesses 3 to 12 mm — 25×3, 25×5, 32×5, 40×5, 50×5, 100×6 and more.Weight chartMS Square Bar Weight Chart (kg/m)MS square bar weight per metre from 10 × 10 to 50 × 50 mm, with weight per 6 m length.Weight chartSHS Weight Chart — Square Hollow Sections (kg/m)Square hollow section (square pipe) weight per metre and per 6 m length, from 20 × 20 to 150 × 150 mm in common wall thicknesses.Weight chartRHS Weight Chart — Rectangular Hollow Sections (kg/m)Rectangular hollow section (rectangular pipe) weight per metre and per 6 m length — 40×20, 60×40, 80×40, 96×48, 122×61, 145×82 and more.Weight chartMS Pipe Weight Chart — IS 1239 Light, Medium, HeavyMS / GI pipe wall thickness and weight per metre for IS 1239 light, medium and heavy class, 15 NB to 150 NB, with outside diameters.Weight chartMS Plate & Sheet Weight ChartSteel plate and sheet weight per square metre, per 1250 × 2500 sheet and per 1500 × 6000 plate, for thicknesses 0.5 mm to 50 mm.Weight chartSS Sheet Weight Chart — Stainless Steel 304 / 316 / 202Stainless steel sheet weight per square metre, per 4 × 8 ft (1219 × 2438) sheet and per 1250 × 2500 sheet, for thicknesses 0.4 mm to 6 mm.
Tools & references
Calculators and charts
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- BOQs, drawings, indents and long product lists — send them as they are
- Recurring monthly requirements quoted as a schedule
- Specified producer, or approved alternatives where the specification allows