Mechanical Tables - Specifications of Structural and Heat Treatable Steels

Specifications of Structural and Heat Treatable Steels

	(IS : 1977-1969; IS : 2062-1969; IS : 226-1969; IS : 961-1962)

Designation of steel	Tensile strength kgf/mm	Yield strength for thickness		Elongation percent	C %	S %	P %	Typical Applications

		upto 20 mm	20-40 mm

St 32-O	32-44	-	-	26	-	0.07	0.07	General engineering purposes
St 42-O	42-54	26.0	-	23	-	0.07	0.07	General engineering purposes

St 42-S	42-54	26.0	24.0	23	0.25	0.055	0.055	All welded structures

St 42-W	42-54	26.0	24.0	23	0.20	0.055	0.055	Subjected to fusion welding

St 58-HT	58 Min.	36.0	35.0	20	0.27	0.055	0.055	Structures without welding

St 55-HTW	55 Min.	36.0	35.0	20	0.20	0.055	0.055	Structures with guaranteed weldability