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25CrMo4

25CrMo4

25CrMo4 Alloy Steel
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25CrMo4 Alloy Steel



Material Name


Material Name: 25CrMo4

Characteristics and scope of application


High hardenability, no temper brittleness, welding is quite good, the formation of cold cracking tendency is small, cutting and cold strain plasticity is good. Generally used in the hardening or carburizing and quenching state and manufacturing in non corrosive medium and the temperature lower than 250 DEG C for 25crmo4 alloy steel, containing mixture of nitrogen and hydrogen medium high pressure tubes and a variety of fastening parts, higher carburized parts, such as gears, shaft and other.


Chemical Composition


C
 Si Mn Mo
 S P
 		Cr Ni Cu
0.22～0.29
 0.10-0.40
 0.60～0.90
 0.15～0.30 Max 0.035 Max 0.035
 0.90～1.20 Max 0.030 Max 0.10

Mechanical Property


Tensile strength
σb (MPa) 		Yield Strength
σs 0.2 (MPa)
Elongation
δ 5 (％)
reduction of crosssection area
ψ (％)
 ballistic work
Akv (J) 		pounding toughness value
αkv (J/cm2)
Hardness
(HB)
specimen size
Min 885 Min 685 Min 12 Min 50
 Min 35
 Min 98
   Max 212 15mm

specification of heat treatment and metallurgical structure


Specification of heat treatment : hardening 880℃ water cooling, oil cooling, tempering 500℃, water cooling, oil cooling.

Delivery State


In the heat treatment (quenching, annealing or tempering) or heat treatment delivery, delivery status should be indicated in the contract.