4140 Forged Steel Round Bars
AISI 4140 alloy steel round bars manufacturers and suppliers, also supplied in square bars,flat bars,rollers,shafts,blocks and forged pieces.
AISI 4140 is a common chromium molybdenum alloy steel.It is widely used in the gas &oil area. SAE4140 forged steel contains a higher carbon content compared with 4130 steel. 4140 has a higher strength and heat treatment capabilities. AISI 4140 machined well at the hardness of HRC18-22.The core of this material retains its bulk properties, while the outer surface is hardened to reduce wear and tear.
Carbon:0.38/0.43; Silicon:0.15/0.35; Manganese:0.75/1.00;
W-Nr: 1.7225; DIN: 42CrMo4; JIS/KS: SCM440;
3.Form & Size
1)Fuhongsteel are manufactures and suppliers of 4140 hot forged steel round bars, square bars,flat bars,shafts,etc.
2)Hot forged steel size available:
Forged flat bars,Blocks,Shafts and forging pieces can be customized.
4.Tolerances on Dimension & Straightness
3)Deviation from straightness:Max 3mm/m;
3)Non metallic inclusions
SAE4140 is a grade of steel an excellent material for such uses as gears, piston pins, crankshafts,and shafts.It is commonly used for a variety of applications in the oil and gas industry. Examples of applications for 4140 steel also include structural tubing,connection rods, stem assemblies, tool holders,tubes for transportation of pressurized gases.
1)Preheat 4140 forged alloy steel uniformly and slowly;
2)Increase the forging temperature to 1150-1200°C.
3)Always keep the forging temperature above 850°C
1) Heating 4140 steel slowly to the temperature 840-875°C;
2)AISI 4140 alloy steel should be quenched in the oil;
3)Heat the steel to the temperature 550-650°C;
4)Soak at this temperature for 2 hours per 25mm of total thickness;
5)4140 steel can be cooled in the air or furnace.
1)Heat AISI 4140 forged steel slowly and thoroughly to 800-850°C;
2)Cool slowly in the furnace to the temperature 480°;
3)Complete annealing the steel in the air.
1)Increase the temperature to 860-880°C;
2)Cool 4140 steel to room temperature in the air.
Enquiry for 4140 hot forging steel round bar, square bar,flat bar,rollers,shafts and blocks.