4140 steel bar supplier: We keep a daily inventory of 1500 tons

What is 4140 steel

AISI 4140 is made by placing iron, carbon, and other alloying elements into an electric furnace or oxygen furnace. The major alloying elements added to AISI 4140 are: Chromium Manganese Molybdenum Once the iron, carbon and other alloying elements have been mixed together in liquid form, it is allowed to cool. The steel may then be annealed; possibly several times.

AISI 4140 is low alloy steel. Low alloy steels rely on elements other than just iron and carbon to enhance their mechanical properties. In AISI 4140, additions of chromium, molybdenum, and manganese are used to increase the strength and hardenability of the steel. The additions of chromium and molybdenum are why AISI 4140 is considered “Chromoly” steel.

1)  4140 steel belongs to the alloy structural steel. After Quenching & Tempering, its hardness is 28-34 HRC.

2) 4140 steel used for bending machine molds.

3) Besides, it can be used to under 2000m deep well of oil drill pipe joint and the fishing tool.

4) Also, it can be used for engineering structural parts, like high tensile shafts, gears, pinions, and spindles.

4140 hr plate: Its heat treatment has good strength and good comprehensive mechanical properties.

The common stainless steel’s chromium content is higher than 12.5%. So it has anti-rust performance. From the analysis of the composition, 4140 steel also has chromium. But its chromium content is only 0.8%-1.1%, which is far lower than the standard for rust prevention. Therefore, 4140 steel is not stainless steel. Please pay attention to its rust prevention when using it.

But 4140 steel can be used to make gears. Because lubricating oil is often used when gears are running. The lubricating oil can protect the gear from rust while protecting the normal operation of the gear.

Otai provides the grinding, milling, polishing, turning, drilling, and other machining services as your required tolerances and size. ( 4140 steel bar supplier: We keep a daily inventory of 1500 tons)

4140 steel bar supplier 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.