MS Angle Weight Per Metre: IS 808 Section Table

MS angle weight per metre ranges from 0.90 kg/m for a 20×20×3 equal angle to 47.10 kg/m for a 200×200×25 section, all as tabulated in IS 808: 1989 — the BIS standard for hot-rolled steel sections. This reference covers both equal and unequal leg angles with the formula and full section table you need for procurement and structural estimates.

Understanding IS 808 — Equal vs Unequal Leg Angles

IS 808: 1989 is the BIS standard that governs the dimensions, section properties and theoretical weights of hot-rolled steel sections produced in India — including beam sections (ISMB, ISWB), channels (ISMC), and angle sections (ISA). When a fabricator or site engineer asks for "50×50×5 angle ka weight," they are referring to the ISA designation system defined in this standard.

The designation works as follows: ISA followed by leg A × leg B × thickness t, all in millimetres. For equal angles, both legs are the same length: ISA 65×65×6 means two legs each 65mm long and 6mm thick. For unequal angles, the legs differ: ISA 100×65×8 means one leg is 100mm, the other 65mm, and the thickness is 8mm. In practice, the longer leg is always listed first.

SAIL (Steel Authority of India) and JSW Steel are the primary producers of IS 808 angle sections in India. Their rolling mills produce to the IS 808 dimensional tolerances, and the theoretical weights in the standard match what these mills invoice. I've cross-referenced SAIL's published section tables with IS 808 repeatedly — they align to within the stated ±2.5% tolerance across all common sizes.

One important clarification that causes confusion: IS 808 specifies dimensions and tolerances. The material grade — yield strength, tensile strength — is governed separately by IS 2062. An IS 808 angle section can be supplied in IS 2062 E250A (Fe410W), E300, or E350 grade. The weight per metre is the same regardless of grade; only the mechanical properties differ.

MS Angle Weight Formula — Derivation and Application

The cross-sectional area of an angle section is the sum of the two leg areas minus the corner material counted twice. For practical calculation:

Area (mm²) = (A + B − t) × t

where A and B are the leg lengths and t is the uniform thickness, all in millimetres. Multiplying by steel density (7.85 g/cm³) and converting units:

W (kg/m) = (A + B − t) × t × 0.00785

The constant 0.00785 = 7.85 / 1000. Let me verify this against a known IS 808 value. For ISA 65×65×6:

W = (65 + 65 − 6) × 6 × 0.00785 = 124 × 6 × 0.00785 = 5.84 kg/m

IS 808 Table 1 lists 5.82 kg/m for this section. The 0.03 kg/m difference (0.5%) arises because the formula treats the corner radius as zero — actual sections have a root radius that slightly increases the area. IS 808 uses the precise section geometry including root and toe radii; the formula is reliable for estimates but always use IS 808 tabulated values for structural calculations.

MS angle ka weight per metre nikalne ka yeh formula field engineers ke liye bahut kaam aata hai jab IS 808 table haath mein nahi hoti.

IS 808 Equal Angle Weight Table — ISA Sections

The table below lists the most commonly ordered equal angle sizes from IS 808: 1989. Weight values are IS 808 tabulated theoretical weights (not formula approximations) based on steel density 7.85 g/cm³.

Source: IS 808: 1989, Tables 1 and 2. Weights are theoretical at steel density 7.85 g/cm³. Actual weight tolerance: ±2.5% per IS 808 Clause 7.

IS 808 Unequal Angle Weight Table — Common Sizes

Source: IS 808: 1989, Table 3. Weights are theoretical at steel density 7.85 g/cm³.

Worked Example — Cut List for a Structural Support Frame

A common fabrication scenario: a contractor needs to cut 40 pieces of ISA 65×65×6 equal angle, each 2400mm long, for diagonal bracing members in a mezzanine support frame. What is the total weight of material to order?

Step 1 — Identify weight per metre from IS 808: ISA 65×65×6 = 5.82 kg/m.

Step 2 — Weight per cut piece:

5.82 kg/m × 2.4 m = 13.97 kg per piece

Step 3 — Total weight of all cut pieces:

13.97 × 40 pieces = 558.7 kg

Step 4 — Stock bars required: Standard supply length for IS 808 angle in India is 6 metres (some mills also supply 10.5m and 12m). Each 6m bar weighs 5.82 × 6 = 34.92 kg and yields 2 cuts of 2400mm with 1200mm waste per bar. So: 40 pieces ÷ 2 cuts per bar = 20 bars minimum. Order 21 bars to allow for one scrap. Total order weight: 21 × 34.92 = 733.3 kg.

The difference between 558.7 kg (net cut weight) and 733.3 kg (order weight including waste) represents 174.6 kg of offcuts — 23.8% waste. If your project budget is tight, it is worth re-examining whether a longer piece length (e.g. 2500mm or 3000mm) allows better utilisation from a 6m bar. Use the free Cut List Optimizer → to test different cut lengths and minimise waste automatically.

For the total order weight calculation, the Metal Weight Calculator → handles this directly: select Mild Steel, Angle section, enter 65mm leg, 6mm thickness, length 6000mm, quantity 21.

SAIL, JSW and Tata Steel — What to Check on the Mill Certificate

In India, IS 808 angle sections are primarily produced by SAIL (Steel Authority of India Limited) at its Bhilai, Durgapur and Rourkela plants, and by JSW Steel at its Vijayanagar facility. Tata Steel produces the smaller and mid-range sizes at its long-products rolling mills. All three publish section weight tables in their product catalogues — and all three align with the IS 808 theoretical weights.

When material arrives at site, check the bundle tag or mill test certificate (MTC) for two things: the IS 808 section designation (confirms dimensions) and the IS 2062 material grade (confirms yield strength). For a structural application, you want IS 2062 E250 (Fe410W) or higher. The weight per metre on the MTC should be within ±2.5% of the IS 808 theoretical value. If a 21-bar bundle of ISA 65×65×6 arrives tagged at 650 kg, that is 30.95 kg per bar against a theoretical 34.92 kg — an 11.4% shortfall that warrants a measurement check before you sign the delivery challan.