Overview
J24053 is a general structural-use alloy. It has high tensile strength and abrasion resistance, especially after heat treated. It also has good weldability, castability, and machinability. Also known as SC 4340, this alloy is typically used for marine propulsion parts.
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
Heat Treatment: Normalize, Quench And Temper