SAE4340 40CrNiMoA Alloy Seamless Steel Pipe

Short Description:

40CrNiMoA alloy seamless steel pipe is a high-strength, high-toughness alloy structural steel pipe. Its composition mainly includes chromium, nickel, molybdenum and a small amount of carbon, silicon, manganese and other elements, through specific proportions and heat treatment processes, it has good corrosion resistance and high temperature performance. Due to its excellent mechanical properties and wide range of application fields, it has been widely used in many industries.

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Chemical Composition

C	Si	Mn	S	P	Cr	Ni	Cu	Mo
0.37~0.44	0.17~0.37	0.50~0.80	≤0.025	≤0.025	0.60~0.90	1.25~1.65	≤0.25	0.15~0.25

Mechanical Properties

Tensile Strength σb (MPa)	Yield Strength σs (MPa)	Elongation δ5 (%)	Impact energy Akv (J)	Shrinkage of section ψ (%)	Impact toughness value αkv (J/cm2)	Hardness HBW
≥980(100)	≥835(85)	≥12	≥78	≥55	≥98(10)	≤269

Application Field

1. In the petrochemical industry, it can be used to manufacture key equipment such as high-pressure vessels, reactors, heat exchangers, etc., which can withstand the effects of high temperature, high pressure and corrosive media.

2. In the electric power industry, it can be used to manufacture components for generator sets, boilers, steam turbines and other equipment, which can withstand high load and high temperature working conditions.

3. In the aerospace field, it can be used to manufacture key components such as aircraft landing gear and fuselage structures to improve the safety and performance of aircraft.

In addition, 40CrNiMoA steel pipes can also be used to manufacture key components in automobiles, ships, railways and other industries to improve product quality and reliability.

Heat Treatment Specification

Quenching temperature: 850 ºC; coolant: oil; tempering temperature: 600 ºC; coolant: water, oil.

Delivery Status

Delivery in heat treatment (normalizing, annealing or high temperature tempering) or no heat treatment condition, the condition of delivery shall be indicated in the contract.

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