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.
Cylinders, marine propulsion, rolls, and shaft sleeves.
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.)
Manganese: 1 MAX
Silicon: 0.60 MAX
Other: Mo 0.30
Minimum Mechanical Properties
Heat Treatment: Normalize, Quench And Temper
Explore Other Alloys
Non-ferrous alloys are, literally, materials that are not iron-based. While others may provide non-ferrous materials of other materials, the MetalTek family of non-ferrous alloys are copper-based. In general, these materials deliver high strength, and excellent wear and corrosion resistance. They are often found in marine applications and also bushing, bearing, and gear environments.
Stainless steels owe their ability to resist corrosion primarily to the presence of a passive film on their surface. Chromium is chiefly responsible for formation of the passive film. Iron ceases to rust at approximately 12% chromium content and resistance to oxidizing corrosives increases rapidly with chromium content up to approximately 20%.
Specialty Alloys comprise a broad group of materials that deliver properties for more demanding applications, use more exotic or expensive materials, or require special processes to manufacture. Where standard materials may not offer desired performance, specialty alloys (including those that are modified further) may be a sensible selection.