What is chemical composition of En24 steel?

Answer 1

EN24 is a (1.5% Ni,Cr,Mo) steel in US equivalent to SAE 4340,

Chemical Composition % - Carbon 0.35-0.45/ Silicon 0.10-0.35/ Manganese 0.45-0.70/ Nickel 1.30-1.80 / Chromium 0.90-1.40/ Moly 0.20-0.35/ Sulphur 0.050 (max)/ Phosphorous 0.050(max).

Mechanical Properties -

Limiting Ruling Section (in) - 6

Tensile Strength (tons/sq.in.) - 55 (min)

Proof Stress (tons/sq.in.) - 41 (min)

Elongation % - 18 (min)

Izod Impact Value (Ft.Lb.) 40(min)

Weldability - POOR

Application - High tensile steel suitable for pump shafts and turbine rotors in general and for similar uses. Non-preferred but sometime used in place of EN 27 steel when the later not available.