Is 4340 a low alloy?
Is 4340 a low alloy?
AISI 4340 is a low alloy steel containing nominally 0.4% C, 0.8% Cr, 0.25% Mo and 1.8% Ni. Often used in preference to AISI 4140 at the higher strength levels because of its better hardenability and improved CVN impact toughness.
Is AISI 4340 Corrosion resistant?
4340 Alloy Steel, Among Other Alloys, is Known for its Toughness. Combining strength and toughness with atmospheric corrosion resistance and wear resistance, 4340 alloy steel is commonly used in forged hydraulic and other machine applications as well as the aerospace industry.
Is AISI 4140 a stainless steel?
Austenitic stainless steel (AISI 304) and low alloy steel (AISI 4140) possess a good combination of mechanical properties, formability, weldability, and resistance to stress corrosion cracking and other forms of corrosion [1], [2].
What is AISI 4340?
AISI 4340 is a Standard grade Alloy Steel. It is commonly called AISI 4340 Nickel-chromium-molybdenum steel.
What is AISI 1020 steel?
ASTM SAE AISI 1020 Steel AISI 1020 steel is also known as C1020 steel in cold worked (cold rolled and cold drawn) condition. 1020 carbon steel is one of the most commonly used plain carbon steels, has good machinability and weldability.
How do you heat treat AISI 4340?
AISI 4340 Steel Grade Heat Treatment. For pre-hardened steel stress relieving is achieved by heating steel 4340 to between 500 to 550°C. Heat to 600 °C – 650 °C, hold until temperature is uniform throughout the section, soak for 1 hour per 25 mm section, and cool in still air.
What is 4340 alloy steel made of?
AISI 4340 is also one kind of nickel chromium molybdenum steels. 4340 alloy steel is generally supplied hardened and tempered in the tensile range of 930 – 1080 Mpa. Pre hardened and tempered 4340 steels can be further surface hardened by flame or induction hardening and by nitriding.
