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1.8519 31CrMoV9 Nitriding Steel

Category : Special Steel

Standard:EN 10085: 2001 Nitriding steel. Technical delivery conditions

Grade:31CrMoV9

Number:1.8519

size :

Diameter : 80 to 600 mm

Length : 1000 to 9000 mm ;

  • Description
  • Specification
  • Standard
  • Process
  • Packing

31CrMoV9 is a nitriding steel which has at least 2.3%Cr,0.15%Mo,0.1%V as strengthening alloy elements.

Due to its high wear resistance,it is mainly used in the automotive industry and general components mechanical engineering.30CrMoV9 is difficult to weld and therefore should not be used in weld constructions.It can attain surface hardness of 800 HV after nitriding.


Chemical composition

C

Si

Mn

P

S

Cr

Mo

V

0.27-0.34

max0.4

0.4-0.7

max 0.025

max0.035

2.3-2.7

0.15-0.25

0.1-0.2


Mechanical Property

Diameter (mm)

16-40

40-100

100-160

160-250

Yiled Strength
(MPa)

≥900

≥800

≥700

≥650

Tensile Strength
(MPa)

1100-1300

1000-1200

900-1100

850-1050

Elongation(%)

≥9

≥10

≥11

≥12

Impact(J)

≥25

≥30

≥35

≥40

Hardness(HB)

331-380

298-359

271-331

253-319


Applications

With its high wear resistance 1.8519 steel is used widely in the engineering and automotive industries. Suitable for components with medium and large cross sections which require high tensile strength and good toughness. Typically used for in gear and engine construction for components such as crankshafts, connecting rods, steering knuckles, screws and bolts.

Heat Treatment

Soft Annealing

Heat to 650-720℃, cool slowly in the furnace. This will produce a maximum Brinell hardness of 248.

Hardening

Harden from a temperature of 870-930℃, followed by oil/polymer or water quenching.

Tempering

Tempering temperature: 580-700℃.

Nitriding

Gas/plasma nitriding temperature (gas, salt bath): 570-580℃

Gas/plasma nitriding temperature (powder, plasma): 580℃

Surface hardness after nitriding: 800 HV

 

Forming Option

1 Hot rolling process

2 Hot Forging: Electro-hydraulic; High-speed-hydraulic; Oil-hydraulic; Precision-forging

 

Heat-treatment Option

1 +A: Annealed (full/soft/spheroidizing)

2 +N: Normalized

3 +NT: Normalized and tempered

4 +QT: Quenched and tempered (water/oil)

 

Surface Option

1 Black Surface

2 Grounded: Bright but rough ; Not precision

3 Machining for plate: Bright and precision; Little turning scar

4 Peeled/Turned: Bright and precision; Little turning scar

5 Polished: Very Bright and precision size; Not turning scar


Other Services

1 Cutting: Small pieces

2 CNC Machine: Produce as your drawing

3 Package: Bare/Nylon/Canvas/Wooden

4 Payment:T/T, L/C, O/A(request credit)

5 Transport:FOB/CFR/CIF/DDU/DDP (train/ship/Air)

 

Mill test certificate

EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.

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