Organic Aisi 4130

AISI 4130

AISI or SAE 4130 grade is a low-alloy steel containing chromium and molybdenum as strengthening agents. The steel has good strength and toughness, weldability and machinability.

AISI/SAE 4130 grade is a versatile alloy with good atmospheric corrosion resistance and reasonable strength up to around 600 F (315 C). It shows good overall combinations of strength, toughness. and fatigue strength.

This low-alloy steel finds many applications as forgings in the aerospace and oil and gas industries as forged valve bodies and pumps, as well as in the automotive, agricultural and defense industries

KEY FEATURE

Low-alloy steel

High tensile strength

Excellent toughness / fatigue strength

CHEMICAL COMPOSITION

HARDENING

This heat treatment results in the formation of martensite after quenching, thus a great increase in hardness and tensile strength, together with some brittleness. The steel should be austenitized i.e. all micro constituents transformed to austenite at 1500 to 1600 F (815 to 870 C). The actual austenitizing temperature is a function of chemical composition within the analysis range, section size and cooling method. Smaller sections of 4130 might be quenched in oil, heavier sections in water.

TEMPERING

Tempering is carried out to relieve stresses from the hardening process, but primarily to obtain mechanical properties required for the final application. The actual tempering temperature will be chosen to meet the required properties, and in many cases will be a matter of trial and error. Tempering should not be carried out between 400 790 F (200 420 C) to avoid the danger of embrittlement.