IS 2490 covers carbon and low alloy steel castings for general engineering. Multiple grades based on minimum tensile strength. All castings must be heat treated (normalised or quenched & tempered). Used for valve bodies, pump casings, gear blanks, and structural castings.
Specification for carbon steel and low alloy steel castings for general engineering covering grades, chemical composition, mechanical properties, heat treatment, and testing.
Key Values
Grade 1 (200-400) tensileMin 400 MPa
Grade 2 (230-450) tensileMin 450 MPa
Grade 3 (280-520) tensileMin 520 MPa
Practical Notes
! All steel castings must be heat treated — as-cast properties are unreliable.
! Normalising is the minimum heat treatment. Q&T gives better properties for critical applications.
! Radiographic (RT) or ultrasonic (UT) testing should be specified for pressure-retaining or critical castings.
! Always specify the grade AND heat treatment condition in the purchase order.