Alloy Grade UNS: SC 4340 – General Structural Use

  • Overview

    J24053, also known as SC 4340, is a versatile alloy steel designed for general structural applications where high strength and wear resistance are essential. This alloy exhibits excellent tensile strength, particularly after heat treatment, making it capable of withstanding significant loads and stresses. Its high abrasion resistance ensures durability and long-term performance in applications involving friction and wear. Furthermore, J24053 offers good weldability, castability, and machinability, providing flexibility in fabrication and design. This combination of strength, wear resistance, and ease of manufacturing makes J24053 a valuable choice for a variety of structural applications, including those in demanding environments where components must withstand heavy loads and resist wear and tear.

  • Typical Uses

    Cylinders, marine propulsion, rolls, and shaft sleeves.

  • MetalTek Grade

    MTEK 4340

Similar Specifications

Cast UNS: J24053

Wrought UNS: G43400

Wrought Grade: AISI 4340

Cast Grade: SC 4340

Cast ASTM: A915, A732

Military/AMS: AMS 5331

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.4

Chromium: 0.8

Manganese: 1 MAX

Iron: BAL

Copper: n/a

Nickel: 1.8

Lead: n/a

Tin: n/a

Silicon: 0.60 MAX

Zinc: n/a

Other: Mo 0.30

Minimum Mechanical Properties

Tensile, ksi

0

Tensile, MPa

0

Yield, ksi

0

Yield, MPa

0

Elongation

0%

Heat Treatment: Normalize, Quench And Temper

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