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20MnV6 Hollow Bar Alloy Steel Seamless Pipes 20MnV6 Surface Hardening Treatments

China 20MnV6 Hollow Bar Alloy Steel Seamless Pipes 20MnV6 Surface Hardening Treatments

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20MnV6 Hollow Bar Alloy Steel Seamless Pipes 20MnV6 Surface Hardening Treatments

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High Light	alloy steel seamless tubes ，seamless alloy steel tube

20MnV6 Hollow Bar

What's the 20MnV6 Hollow Bar specification, 20MnV6 Hollow Bar chemistry, 20MnV6 Hollow Bar equivalent, 20MnV6 Hollow Bar Mechanical Properties? 20MnV6 Hollow Bar manufacturer in China.

What is 20MnV6

20MnV6 is a carbon-manganese steel micro alloyed with vanadium, generally supplied in the black hot rolled condition with

a typical tensile strength range of 600 - 790 Mpa and a high typical yield strength range of 440 - 570 Mpa.Characterized by

excellent machinability due to silicon - calcium treatment and precise control of the sulphur content, excellent weldability

with high yield and tensile strengths due to the micro - alloying effect of the vanadium.The low carbon content and the

vanadium addition allows surface hardening by carburising, carbonitriding or nitriding. It will also respond to high or

medium frequency induction hardening and can be through hardened and tempered producing a moderate improvement in

tensile and yield strength, this varying depending upon wall thickness.20MnV6 hollow bar is used extensively by all

industry sectors for a wide range of applications utilizing it's considerable saving on machining time and weight over solid

bar.

20MnV6 Typical applications are: Bushes, Cylinders Various, Conveyor Rolls, Hollow Shafts, Hollow Parts and components, Nuts,

Rings, etc.

20MnV6 Related Specifications

Europe EN 10294-1

France NF A49312 20MV6

Germany W.Nr 1.5217 20MV6

W.Nr 1.8905 StE 460

Great Britain BS4360 GR 55

USA UNS K01907 and K12202

20MnV6 Chemical Composition (Base Material)

	Min %	Max %
Carbon	0.16	0.22
Silicon	0.10	0.35
Manganese	1.130	1.60
Vanadium	0.08	0.15
Phosphorous	0	0.03
Sulphur	0.02	0.04

20MnV6 Mechanical Property Requirements - As Supplied in the Black Hot Rolled Condition
Tensile Strength Mpa Min. Wall Thickness (mm)	＜16	620
	＜25	310
	＞25	550
0.2% Yield Strength Mpa Min. Wall Thickness (mm)	＜16	470
	＜25	460
	＜30	430
	＜40	420
	＜50	410
	＜70	400
Elongation on 5.65√S0 % Min		18
Hardness Brinell Min		180
Typical Mechanical Properties - As Supplied in the Black Hot Rolled Condition
Tensile Strength Mpa	690
Yield Strength Mpa	500
Elongation %	21
Hardness HB	210
Typical (Minimum) Mechanical Properties - Water Quenched at 925 oC and Tempered at 580 oC.
Tensile Strength Mpa Wall Thickness (mm)	＜20	750
	＜25	700
	＜30	650
0.2% Yield Strength Mpa Min. Wall Thickness (mm)	＜20	650
	＜25	620
	＜30	570
Elongation % Wall Thickness	＜20	16
Elongation % Wall Thickness	＞20	17
Impact +20oC 0oC -20oC J		40
		32
		28

20MnV6 Carbonitriding

Heat to 870 oC - 880 oC in a gaseous media consisting of carbon monoxide/hydrocarbon plus ammonia, hold for sufficient

time to develop the required case depth, carbon and nitrogen content, followed by quenching in oil or water as required.

Typical case hardness achieved up to Rc 60.Tempering immediately while still hand warm at 150 oC - 200 oC will reduce

stresses and improve the toughness of the case.

20MnV6 Carburizing

Pack, salt or gas carburise at 880 oC - 920 oC, holding for sufficient time to develop the required case depth and carbon

content, followed by a suitable heat treatment cycle to optimise case and/or core properties.Typical case hardness

achieved up to Rc 63.

20MnV6 Case Hardening

Water quench from 760 oC - 780 oC.

20MnV6 or Core Refining

Oil quench from 870 oC - 880 oC prior to water quench as above.Tempering immediately following water quench at 150 oC -

200 oC will reduce stresses and improve toughness of case.

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