1.Size of 4140 alloy steel Diameter(mm):20~600 Length (mm):1000~6000 Plate Thickness(mm):Max:800 Width (mm):Max:2200 Length (mm):Max:6000 The specification can be customized. 2.Chemical Compositions C:0.38-0.45 Si:0.17-0.37 Mn:0.50-0.80 P:Max 0.035 S:Max 0.035 Cr:0.90-1.20 Mo:0.15-0.25 3.Similar Grade GB:42CrMo AISI:4140 DIN:1.7225 JIS:SCM440 4.Features of 4140 steel (1)Chromium molybdenum alloy steel. (2)Slightly higher carbon content than 4130. (3)Greater strength and heat treatment. (4)Good processability and easy polishing. (5)Good toughness and small quenching deformation. 5.Application For connection rods,conveyor pins,gears,stem assemblies,pomp shafts and tool 6.Min.Order Quantity:5 Ton/Tons Our MOQ is flexible Supply Capacity:5000 Ton/Tons per Month or based on the clients' demand Port:Shenzhen Payment Terms:L/C,D/P,T/T 7.Packaging & Delivery In seaworthy packing or based on your order Shipped in 15 days after payment 8.Special Use:Mold Steel 9.Surface treatment: black/peeling/polished/machined Heat treatment:annealing/Q+T Technology:hot rolled,cold drawn,forged