What is AISI 4340 steel called?

What is AISI 4340 steel called?

AISI 4340 Alloy Steel (UNS G43400)

Is AISI 4340 stainless steel?

Both AISI 304 stainless steel and SAE-AISI 4340 steel are iron alloys. For each property being compared, the top bar is AISI 304 stainless steel and the bottom bar is SAE-AISI 4340 steel.

How much carbon is SAE 4340?

AISI / SAE 4340 Alloy Steel

Chemical Analysis
C% Carbon 0.38 – 0.43
Mn% Manganese 0.6 – 0.8 max
P% Phosphorus 0.035 max
S% Sulfur 0.040 max

What is the difference between 4340 and 4140 steel?

However, 4340 has more carbon, while 4140 has more chromium. One of the most significant differences between the two metals is the inclusion of nickel in 4340 steel, which accounts for the metal’s greater strength and fracture toughness.

What does AISI 4340 mean?

AISI 4340 is a heat treatable, low alloy steel containing nickel, chromium and molybdenum. It is known for its toughness and capability of developing high strength in the heat treated condition while retaining good fatigue strength. Applications.

What is the chemical composition of 4340 steel?

AISI 4340 is a low alloy steel containing nominally 0.4% C, 0.8% Cr, 0.25% Mo and 1.8% Ni. Higher strength levels up to 150 KSI 0.2% PS may be achieved by suitable heat treatment. Often used in preference to AISI 4140 at the higher strength levels because of its better hardenability and improved CVN impact toughness.

What are the principal alloying elements in AISI 4340 steel?

AISI 4340 alloy steel is a heat treatable and low alloy steel containing chromium, nickel and molybdenum. It has high toughness and strength in the heat treated condition.

What is the yield strength for AISI 4340?

Steel GradesAISI 4340 Chemical information,Mechanical properties Physical properties, Mechanical properties, Heat treatment, and Micro structure Yield Strength 23 σ 0.2 ≥/MPa Elongation 65 δ5≥ (%) ψ – ψ≥ (%) Akv – Akv≥/J HBS 123-321 – HRC 30 – AISI 4340 Mechanical Properties Tensile strength 231-231 σb/MPa Yield Strength 154 σ 0.2 ≥/MPa

What is the hardness of 4340 steel?

4340 steel offers toughness and high strength in the heat treated condition, with good fatigue strength. Available in round bar 4340 is available fully certified and suitable for applications requiring a quality high tensile alloy steel. AISI 4340 is commonly supplied quenched and tempered with a hardness of between 24 to 29HRc.

What is the Rockwell hardness of 4340 steel?

The Rockwell Hardness is: Rc= 100 – (Y2- Y1) / 0.002 Table 1: Hardness numbers for 4340 Steel in various heat treat conditions. Steel 4340 Yield Stress (psi) Nominal