Chemical Composition

4140

C               Si                Mn              P            S           Cr             Mo

0.38-0.43       0.15-0.35    0.75-1.00     ≤0.035   ≤0.040  0.80-1.10  0.15-0.25

Delivery Condition
Annealing or Q+T
Q+T Mechanical properties 
Tensile Strength σb≥1080 MPA
Yield Strength   σs≥930 MPA
Elongation      δ5≥12%
Hardness       ≤217HB
Sizes  
Round bar: Diameter(mm) Max 800mm; Length(mm) Max 12000mm.
Plate:         Thickness(mm) Max 800mm; Width(mm) Max 2200mm; Length(mm) Max 12000mm.
Packing
20ft: GW 27T; (5.80mX2.13mX2.18m)
40ft: GW 27T; (11.8mX2.13mX2.18m)