IS 4826 covers HR steel sheet/strip with guaranteed minimum yield strength, unlike IS 1079 which specifies maximum yield. Used for structural applications where minimum strength is required — automotive, trailers, pressure vessels, and heavy equipment.
Specification for hot rolled high strength low alloy (HSLA) steel sheet and strip with specified minimum yield strength for structural applications.
Key Values
Grade 240 yield min240 MPa
Grade 280 yield min280 MPa
Grade 350 yield min350 MPa
Practical Notes
! IS 4826 guarantees MINIMUM yield. IS 1079 specifies MAXIMUM yield. Choose based on whether your design needs minimum strength guarantee or maximum formability.
! For structural applications, IS 4826 is better than IS 1079 because yield strength is guaranteed.
! Grade 350 is used for truck chassis, trailer bodies, and crane booms where high strength-to-weight ratio is critical.