Mechanical properties of 40CrNiMoA 40CrNiMoA round steel

Mechanical properties and delivery status Mechanical properties
Tensile strength:
Yield strength:
Elongation ():
Reduction of area ():
Impact energy:
Impact toughness value (/):
Sample size: The sample blank size is
Heat treatment: (Quenching temperature coolant: oil Tempering temperature coolant: water, oil)
/> Steel annealed or high temperature tempering supply status Brinell hardness
Delivery status
Delivery in heat treatment (normalizing, annealing or high temperature tempering) or non-heat treatment status, the delivery status should be in the contract Note.
Usage: Used as quenched and tempered parts that require high strength, high toughness, large cross-section size, and more important parts, such as the transmission eccentric shaft of a horizontal forging machine, the crankshaft of a forging press, etc. It is used after quenching and tempering to make important parts that require good plasticity, high strength and large size. If there are high-load shafts in heavy machinery, turbine shafts with larger diameters, blades, high-load transmission parts, fasteners, crankshafts, gears, etc. In addition, it can also be used to make important parts with special performance requirements after nitriding treatment.
●Representation method
① The two digits at the beginning of the steel number indicate the carbon content of the steel, expressed in ten thousandths of the average carbon content, such as alloy pipes ② The main alloying elements in steel, except for individual microalloys Except for elements, it is usually expressed in percent. When the average alloy content is ., the steel number is generally marked with the element symbol instead of the content. However, in special circumstances where it is easy to cause confusion, the element symbol can also be marked with a number, such as the steel number and the chromium content of the former. is ., the latter is ., and the remaining ingredients are all the same. When the average content of alloy elements is ., ., 3., the content should be indicated after the element symbol, which can be expressed as, etc. accordingly. For example.
③Alloying elements such as vanadium, titanium, aluminum, boron B, and rare earth R in steel are all micro-alloying elements. Although the content is very low, they should still be marked in the steel grade. For example, in B steel. Vanadium is..., Boron is...
④High-grade high-quality steel should be added at the end of the steel number to distinguish it from general high-quality steel.
⑤Special-purpose alloy structural steel, the steel number is preceded (or suffixed) with a symbol representing the purpose of the steel type. For example, the steel number 3 for rivet screws is expressed as 3.