ISMB Beam Weight Chart and Standard Sizes (India)
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ISMB Beam Weight Chart and Standard Sizes (India)
When you’re estimating material, costing a project, or planning transport, the weight of an ISMB beam is the number you need. This chart lists the standard ISMB sizes with their nominal weight per metre, plus a quick method to calculate the total weight of any length.
ISMB standard weight chart
Below are the commonly referenced ISMB sections and their approximate weight per metre under IS 808. Always confirm against the current standard revision and your mill test certificate before ordering.
- ISMB 100 — approx. 11.5 kg/m
- ISMB 125 — approx. 13.0 kg/m
- ISMB 150 — approx. 14.9 kg/m
- ISMB 175 — approx. 19.3 kg/m
- ISMB 200 — approx. 25.4 kg/m
- ISMB 225 — approx. 31.2 kg/m
- ISMB 250 — approx. 37.3 kg/m
- ISMB 300 — approx. 44.2 kg/m
- ISMB 350 — approx. 52.4 kg/m
- ISMB 400 — approx. 61.6 kg/m
- ISMB 450 — approx. 72.4 kg/m
- ISMB 500 — approx. 86.9 kg/m
- ISMB 600 — approx. 122.6 kg/m
The designation number is the section depth in millimetres — ISMB 400 is 400 mm deep. For other I-section classes, see types of I-beams.
How to calculate total beam weight
Total weight is simply weight per metre multiplied by length:
Total weight (kg) = weight per metre (kg/m) × length (m)
For example, an ISMB 200 that’s 6 metres long weighs roughly 25.4 × 6 = 152.4 kg. Multiply by the number of pieces for a full order weight — useful for both costing and arranging the right transport.
Why weight matters when buying
Steel is priced and shipped by weight, so accurate figures keep your estimates honest and your delivery planning realistic. Lighter sections like ISLB save weight and cost where loads allow, while heavier ISMB or wide-flange sections are used where capacity is the priority. For channels, see the steel channel weight chart.
FAQ
What is the weight of ISMB 150? Approximately 14.9 kg per metre.
Does the chart weight include tolerance? These are nominal values; actual weight can vary slightly within rolling tolerances, so verify with mill data.
How do I get total weight? Multiply weight per metre by total length in metres.
Need ISMB beams cut to length in a specific grade? Browse our structural steel beams or request a quote. The complete reference is in our structural steel beams guide.
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A: Carbon steel relies on carbon content alone for its properties. Alloy steel adds elements like chromium, nickel, molybdenum, and vanadium to achieve specific improvements — higher strength, better low-temperature toughness, creep resistance, or corrosion resistance — giving it a far broader performance range than carbon steel.
A: For ambient to 400°C service, ASTM A516 Grade 70 is the standard choice. For high-temperature refinery or power plant use (up to 600°C), ASTM A387 Grade 11 or 22 (chrome-moly) applies. For cryogenic service down to -196°C, 9% nickel steel (ASTM A553) is required.
A: Wear-resistant grades like AR400/AR500 are quenched to martensitic hardness of 370–500 HB — 3–4× harder than structural grades like A572-50. They resist abrasive wear in mining and construction equipment but have limited weldability and are not suitable as primary structural members.
A: CE (= C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15) predicts susceptibility to hydrogen-induced cold cracking during welding. Sheets with CE above ~0.40 require preheating to slow cooling and allow hydrogen diffusion, preventing weld cracking. Always develop a qualified WPS based on the specific CE value.
