Home Alloy Steel 4140 Alloy Steel 4140 Grade Summary: Alloy Steel 4140 is an oil-hardening, chromium-molybdenum steel that has good strength and wear resistance. It also has excellent toughness and ductility with the ability to resist stress and creep at prolonged high temperatures (up to 1000). Alloy Steel 4140 is also available in leaded grades that have greatly improved machinability, but should not be used in applications over elevated temperatures cause lower ductility in leaded grades. Typical Applications: Drill collars High temperature bolts Sprockets Kelly bars Reamer bodies Rotary table shafting Oil well tool joints Spindles Stay bolts Tractor axles Tractor arms Axle shafts Valves Bolts Subs Couplings Trailer axles Winch shafts Piston rods Rams Hydraulic machinery shafts Precision lead screws Chain links Zinc die-casting dies. Available Products: Round Bar Flat Bar Square Bar Hexagon Bar Plate Typical Chemical Analysis: * C – .38/.43 Max. *Mn – .75/1.00 *P – .035 Max. *S – .04 Max. *Si – .15/.35 *Cr – .80/1.10 *Mo – .15/.25 Typical Mechanical Properties** Tensile Strength (PSI) 70,000 Yield Point (PSI) 60,000 Elongation*** 20 Brinell Hardness 200 * Chemical Analysis will vary on each heat number ** Ranges shown are for 4140 Annealed- All values are minimum values and are representative. *** % in 2” Alloy Tube Details: Alloy Tube is measured by taking the following: The outside diameter (inches) The wall thickness (inches) The inside diameter (inches) Metal Supermarkets offers a variety of shapes and sizes of alloy steel, cut to the size you needSHOP NOW