Comparison of CNC Machining Materials

The information contained herein is typical values intended for reference and comparison only. They shall NOT be used as a basis for design specifications or quality control.

  • 4140 steel alloy CNC machining metal material — high-strength, durable metal for precision CNC machined components.

    Steel Alloy 4140

    Impact Resistance, Fatigue Resistant

    AISI 4140 Alloy Steel is a medium-carbon chromium-molybdenum steel with a carbon content of about 0.38–0.43%. It offers an excellent combination of strength, toughness, wear resistance, and machinability. When heat-treated, it provides outstanding mechanical properties, making it widely used in gears, crankshafts, connecting rods, bolts, and critical components in the oil and gas industry.

  • Stainless steel CNC machining metal material — corrosion-resistant, high-strength metal for precision CNC machined components.

    Stainless Steel 304

    Corrosion Resistant, Economical, Machinability

    stainless steel 304 is also known as 18/8 stainless steel, which contains approximately 18% chromium (Cr) and 8% nickel (Ni). It not only possesses excellent oxidation resistance and corrosion resistance, but also has good workability and surface quality. Currently, it is the most widely used stainless steel grade in industrial manufacturing and civil applications.