IS 1977 covers ordinary quality structural steel — cheaper than IS 2062 because mechanical properties (yield, tensile) are NOT guaranteed. Only chemical composition and bend test are specified. Used for non-critical applications like fencing, gates, and temporary structures.
Specification for structural steel of ordinary quality used in general construction where guaranteed mechanical properties are not critical.
Key Values
Carbon max0.27%
Sulphur max0.055%
Phosphorus max0.055%
Practical Notes
! DO NOT use IS 1977 for structural members designed per IS 800 — design codes require IS 2062 with guaranteed yield strength.
! IS 1977 is for non-structural applications: fencing, gates, gratings, temporary supports, and fabricated items where loads are nominal.
! Price is 5-10% lower than IS 2062 due to relaxed quality requirements.
! No impact test requirement — not suitable for low-temperature or dynamic loading applications.