What is 4140 normalized?

The nominal normalizing temperature for 4140 grade is 1600 º F (870 º C), but production experience may necessitate a temperature either 50 º F (10 º C) above or below this figure.

How does 4140 steel Harden?

For 4140 steel, the recommended heat treatment [1] consists of heating to austenitizing temperature, typically 1570°F (855°C), followed by oil quenching. Tempering (reheating after quenching) will achieve the desired hardness range.

Can you flame harden 4140?

Flame hardening is a surface hardening process used on medium carbon mild or alloy steels (such as 1045, 4140, 4340), or cast irons, to produce a hard wear resistant surface (case) on the part.

Can you air quench 4140?

By contrast, 4140 is a medium-carbon (nominal 0.40%C) chromium-molybdenum alloy steel that is most often oil quenched to attain an as-quenched hardness ranging from about 54-59 HRC (as quenched), depending on the precise carbon content (which affects the hardenability of the material).

What are the types of steel 4140?


  • Crankshafts
  • Bolts/Nuts
  • Gears
  • Milling spindles
  • Collars
  • Jigs
  • Steel conveyor and roll
  • Fixtures
  • Steel coupling
  • What is 4140 steel used for?

    What industries use 4140 Steel? 4140 steel is often used in the automotive, agricultural, and defense industries. What are common 4140 Steel applications? Shafts; Crankshafts; Bolts/Nuts; Gears; Milling spindles; Collars; Jigs; Steel conveyor and roll; Fixtures; Steel coupling; Machinability of 4140 Alloy Steel. 4140 alloy steel hex bar is readily machinable.

    How strong is 4140 steel?

    Tensile Strength: AISI 4140 steel typically has a target ultimate tensile strength of around 95,000 psi. The table below highlights the chemical composition of AISI 4140: The addition of chromium and molybdenum promotes corrosion resistance.

    How much does 4140 steel cost?

    The cost of steel plate and other steel materials is complex and fluctuating, as there are a number of factors that can impact price.. Steel is typically priced by hundredweight (CWT), which is the price per 100 pounds of material. In some situations – such as materials market reports – carbon steel price may be reflected per-pound.