31CrMoV9 steel is one kind of nitriding structural steel named by European standard; [SCALE STEEL]In GB standard the name is 31Cr3MoV.
CHINA GB/T 37618-2019 31Cr3MoV，A31311
GERMANY DIN EN 10085:2001
(DIN 17211:1987) 31CrMoV9，1.8519
ISO ISO 683-5:2017 31CrMoV9[SCALE STEEL]
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[SCALE 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.
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 [SCALE 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.
FROM SCALE STEEL