31CrMoV9 steel is one kind of nitriding structural steel named by European standard; [TJC STEEL]In GB standard the name is 31Cr3MoV.

 

Standards:

CHINA	GB/T 37618-2019	31Cr3MoV，A31311
GERMANY	DIN EN 10085:2001 (DIN 17211:1987)	31CrMoV9，1.8519
ISO	ISO 683-5:2017	31CrMoV9[TJC STEEL]

 

 Chemical Composition(%)

GRADE	31Cr3MoV	31CrMoV9
C	0.27~0.34	0.27~0.34
Si	0.17~0.37	≤0.040
Mn	0.40~0.70	0.40~0.70
P	≤0.030	≤0.025
S	≤0.030	≤0.035
Cr	2.30~2.70	2.30~2.70
Mo	0.15~0.25	0.15~0.25
V	0.10~0.20	0.10~0.20
Ni	≤0.030	—
Cu	≤0.030	—

 

Property& Characteristics for 31CrMoV9，1.8519 Nitrided Steel:

(1) Good toughness;

(2) High performance in hardenability, when selecting the appropriate heat treatment process,  the diameter could be up to 70mm under[TJC STEEL] completely quenching;

(3) After the surface nitriding, the hardness can reach 1000HV, with excellent wear resistance, as well as good anti-bite, anti-scratch ability.

 

Applications

31CrMoV9 after "conditioning + nitriding" service and is suitable for the need of high tensile strength and good toughness of medium-sized and large cross section component, generally do not carry heavy load, often used in the [TJC STEEL]manufacture of the gear and the engine structure of components, such as hydraulic piston, piston rod, connecting shaft, connecting rod, steering knuckle, inner gear ring, screws and bolts, etc.