ISA 40×25×4 Weight, Dimensions and IS 808 Properties
ISA 40×25×4 weighs 1.9 kg per metre as per IS 808:1989.
- One 6-metre length weighs 11.4 kg · one 12-metre length weighs 22.8 kg
- Long leg 40 mm · short leg 25 mm · thickness 4 mm · area 2.42 cm²
- Maximum principal moment of inertia Iuu = 4.17 cm⁴
ISA 40×25×4 is a standard unequal-leg angle in IS 808:1989. At 1.9 kg/m with a 40 mm long leg and 25 mm short leg, it is used for light secondary connection angles in sheet-metal enclosures, edge stiffeners on access panels, and purlin clip brackets for very light agricultural shade structures.
ISA 40×25×4 Weight Calculator
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ISA 40×25×4 — Weight Calculator
IS 808:1989 Dimensions and Sectional Properties
| Property | Symbol | Unit | Value |
|---|---|---|---|
| Long leg | A | mm | 40 |
| Short leg | B | mm | 25 |
| Thickness | t | mm | 4 |
| Cross-sectional area | A | cm² | 2.42 |
| Mass per metre | — | kg/m | 1.9 |
| Centroid from back of long leg | Cxx | cm | 1.04 |
| Centroid from back of short leg | Cyy | cm | 0.54 |
| Moment of inertia (x–x) | Ixx | cm⁴ | 3.75 |
| Moment of inertia (y–y) | Iyy | cm⁴ | 0.91 |
| Moment of inertia (u–u, max principal) | Iuu | cm⁴ | 4.17 |
| Moment of inertia (v–v, min principal) | Ivv | cm⁴ | 0.49 |
| Elastic section modulus (x–x) | Zxx | cm³ | 1.35 |
| Elastic section modulus (y–y) | Zyy | cm³ | 0.51 |
| Radius of gyration (u–u) | ruu | cm | 1.31 |
| Radius of gyration (v–v) | rvv | cm | 0.45 |
| Tangent of principal axis angle | tan α | — | 0.328 |
Dimensions and properties as per IS 808:1989 (reaffirmed 2021). x–x axis is parallel to the long leg; y–y axis is parallel to the short leg; u–u is the maximum principal axis at angle α to x–x. Mass tolerance: ±3% per piece per IS 808.
Common Applications of ISA 40×25×4
ISA 40×25×4 is used for light secondary connection angles in sheet-metal enclosures, edge stiffeners on access panels, and purlin clip brackets for very light agricultural shade structures. General steel merchants and angle stockists carry this size in IS 2062 E250 grade in 6 m and 12 m lengths. JSPL, SAIL, and RINL (Vizag Steel) all roll this designation to IS 808:1989 as standard stock.
Worked Example
A fabricator in Rajkot needs 200 edge stiffener clips for a sheet-metal enclosure frame using ISA 40×25×4, each 100 mm long. Total length = 200 × 0.1 = 20.0 m. Weight = 20.0 × 1.9 = 38.0 kg. At ₹63,000 per tonne (Rajkot, May 2026), material cost is approximately ₹2,394 before cutting charges.
Related ISA Unequal Angle Sections
Compare with adjacent sizes: ISA 30×20×3 (1.1 kg/m) · ISA 45×30×4 (2.2 kg/m). For all ISA unequal angles see the Section Reference Library →
Frequently Asked Questions
What is the weight of ISA 40×25×4 per metre?
ISA 40×25×4 weighs 1.9 kg per metre as specified in IS 808:1989. For a standard 6-metre length, the total weight is 11.4 kg. For a 12-metre length, total weight is 22.8 kg.
ISA 40×25×4 ka weight per meter kitna hota hai?
IS 808:1989 standard ke according, ISA 40×25×4 ka weight 1.9 kg/m hota hai. 6 metre ki ek length ka total weight 11.4 kg hoga. Zyada accurate calculation ke liye upar diya gaya calculator use karein.
What are the dimensions of ISA 40×25×4?
ISA 40×25×4 per IS 808:1989 has a long leg of 40 mm, short leg of 25 mm, thickness of 4 mm, and cross-sectional area of 2.42 cm².
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