4340 steel vs 4130 steel:For the different material comparisons, which one we should choose to use?

4140 steel China suppliers, wholesale, distributors, and stockholder–Dongguan Otai Special Steel Co Ltd. We Otai is a manufacturer and has a large quantity of stock in our warehouse. We supply in Round bar, gauge plate steel, pipe, tube, rod, square, hexagonal, blanks, plate, sheet, precision ground flat bar. Including precision ground bar stock, hollow bar, we provide black surface and black surface alloy steel material.

4340 alloy structural steel belongs to gear steel.

It is used for important tempering parts that require good toughness, high strength, and large size, such as heavy machinery high-load shaft, turbine shaft with a diameter greater than 250mm, helicopter rotor shaft, turbojet engine turboshaft, blade, high-load transmission parts, crankshaft fasteners. Gear, etc. It can also be used for rotor shaft and blade with an operating temperature of over 400℃. It can also be used to make important parts with special performance requirements after nitriding treatment, which can be used for ultra-high-strength steel after low-temperature tempering or isothermal quenching.

4130 Steel is a high-quality Quenched and Tempered Alloy Structural steel.

It belongs to the high-quality low carbon, Low alloy chromium, molybdenum, nickel case hardening steel. Oil Quenched & Tempered Hardness is 18-22 HRc. Annealing delivery hardenss less than 250HB. With a lower carbon content range, So have good weldability.

Requirements for the manufacture of higher intensity than the 35CrMo steel and tempered forging greater cross-section. Such as large locomotive traction gears, supercharger drive gear, pressure vessels, gear, rear axle, greatly affected by load and spring clip link. It can also be used to 2000m deep oil drill pipe joints and fishing tools and can be used bending machine mold, etc.

Otai provides the grinding, milling, polishing, turning, drilling, and other machining services as your required tolerances and size.

Otai does not act as a material handler. We possess proprietary technology and continuously iterates. We undertake every order to end and solve customer’s problem without any hesitation on responsibility. We are welcome to your kind inquiry.