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6m Length 31CrMoV9 / 1.8519 Alloy Steel Round Bar GB Forged Steel Rod

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6m Length 31CrMoV9 / 1.8519 Alloy Steel Round Bar GB Forged Steel Rod

Name: 6m Length 31CrMoV9 18519 Alloy Steel Round Bar GB Forged Steel Rod
Brand: DELTA
Price: 600 USD

China 6m Length 31CrMoV9 / 1.8519 Alloy Steel Round Bar GB Forged Steel Rod wholesale

Brand Name : DELTA

Model Number : 31CrMoV9

Certification : ISO

Place of Origin : China

MOQ : 1 Ton

Price : 600-850 USD/Ton

Payment Terms : L/C, T/T, Western Union

Supply Ability : 20Ton per week

Delivery Time : 5 - 12 days based on the quantity

Packaging Details : standard packing for export

Products Name : Alloy Steel Round Bar

Diameter : 10 - 500mm

Length : 6m

Tech : Hot rolled

Service : Cutting

MOQ : 1 Ton

Loading Port : Shanghai Port

Standard : ASTM EN GB

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6m Length 31CrMoV9 / 1.8519 Alloy Steel Round Bar GB Forged Steel Rod

Products Specification

Products Name	31CrMoV9 Alloy Steel Round Bar
Diameter	10 - 500 mm
Length	6m or custom cutting any length as request
Type	Hot Rolled
Brand	BAOSTEEL DELTA DONGBEI HUAXI SHAGANG.etc
MOQ	1 Ton
Loading Port	Shanghai Port
Packing	packing by steel wire rope
Deliver time	5 - 7 days for stock materials
Other Grade	Q195,Q235,10#,20#,35#,45#,Q215,Q345,12Cr1Mov,15CrMo,304,3 16,20Cr,40Cr,20CrMo,35CrMo,42CrMo,40CrNiMo,GCr15,65Mn,50Mn, 50Cr,3Cr2W8V,20CrMnTi,5CrMnMo ,38CrMoAl, 31CrMoV9
Standard	ASTM GB EN DIN
Application	Structure and Industrial

Regular Standard Size of our Round Bar in Stock

Standard Diameter

10 12 15 18 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 120 130 140 150 160 180 200 210 220 230 250 270 300 320 330 350 360 370 380 390 400 410 420 430 440 450 460 470 480 490 500

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.31CrMov9 is directly involved the nitriding steel 30CrMoV9 (DIN1.7707).

1.Supply Form & Size & Tolerance

Hot rolled bar:Φ6-Φ130mm,Length:3000-10000mm
Hot Forged round bar:Φ130-Φ500mm,Length:3000-10000mm
Flat bar/Blcoks:Thickness :120-800mm xWidth:120-1500mm,Length:2000-6000mm

Surface Finish	Tolerance
Black For Forged condition	(0,+5mm)
Black For Rolled condition	(0,+1mm)
Rough Turned	(0,+3mm)
Grinding	Best h9
Polished	Best h11
Peeled	Best H11
Cold Drawn	Best H11

2.Chemical Composition

Grade	C	Mn	P	S	Si	V	Cr	Mo
31CrMoV9/1.8519	0.27-0.34	0.40-0.70	≤ 0.025	≤ 0.035	≤ 0.4	0.1-0.2	2.3-2.7	0.15-0.25

3.Physical Property

Density ,g/cm3: 7.85
Specific heat capacity, J/(kg.K):460
Thermal conductivity ,W/(m.K):42
Electric resistivity,Ohm.mm2 /m:0.19
Modulus of elasticity ,Gpa: 210

4. Mechanical Property

Diameter d mm	16-40	40-100	100-160	160-250
Yield 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

5.Forging

Heat the temperature between 1050℃-1150℃,hold suitable time for the steel to be thoroughly heated.Reheat the steel once temperature below 850°C. Crack is easily occured when improper cooling way after forged,so it should be cooled as slowly as possible in the furnace or in sand after forged.

6.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

Hold time,h	Hardness,HV
30	750	540	430	410	400	380	380
90	830	750	640	530	430	410	410
120	790	730	660	600	540	460	400
180	800	760	700	640	580	550	420
Depth,mm	0.15	0.25	0.35	0.45	0.55	0.65	1

7.Jominy Test -Distance from quenched end mm

mm	2	8	12	16	20	30	40	50	60	70
HRC	51	50	50	49	48	46	44	42	41	41

8.Application

31CrMoV9 nitriding steel is used in mechanics automotive and general mechanics, which must be nitrided for very high wear forces, for example, gears, rods or axes.Structural parts of medium and large cross sections and high surface hardness, e.g., valve and gate valves, cylinders for combustion engines, superheated steam valves and fittings.

6m Length 31CrMoV9 / 1.8519 Alloy Steel Round Bar GB Forged Steel Rod

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