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21CrMoV5-7 DIN 1.7709 Forged Alloy Steel Bar

Group Hot Forged Steel Bars
PriceUS $1600 / metric ton
Min. Order 1 metric ton
Terms of Payment L/C, D/A, D/P, T/T
Update Time 2019-07-02
Item specifics
Steel grade21CrMoV5-7 DIN 1.7709
ApplicationsHeavy Duty Shafts, Gears, Axles, Spindles, Couplin
Heat treatmentNormalized,Quenching and Tmenpering
Surface conditionBlack or bright surface
StandardASTM A26

PRODUCT DESCRIPTION

Alloy structural steel is provided with higher yield strength, tensile strength, endurance strength, yield ratio (about 0.85 generally ) enough plasticity and toughness.The concentration of alloy element of this kind of steel is quite high, mainly are corrosion resistant steel, heat resistant steel, wear resistant steel, and other special steels of physical and chemical properties. Alloy structural steel has preferable mechanical property than that of carbon structural steel, high performance of heat treatment especially.The alloy is usually produced by EAF /VD /LF followed by electroslag refining (ESR) if necessary for special purpose.Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different level according to the buyers' requirements.Bars are usually supplied bright in the annealed condition.Final heat treatment - heat treatment / QT 

TYPICAL APPLICATIONS

Alloy structural steels are widely used in the filed of ship, vehicle, airplane, guided missile, weapons, railway, bridges, pressure vessel, machine tools, mechanical components with a bigger sectional size and so on. Mechanical gears, gear shaft, main axis, valve rodMechanical parts - connecting rod, bolt and nutMultidiameter shaftPressure vessel, seamless pipe

PRODUCT PROFILE  

Round bar / Wire rod (Diameter)  0.50mm to 800mmSquare bar / Flat bar: 3mm to 1000mmPlate / Sheet steel / Steel strip: 0.1mm to 1000mmWidth: 8mm to 2500mmLength: random length or based on the customer's special requirement.Forged steel shape: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /other different shapes based on OEM.

 21CrMoV5-7 Chemical composition

C()

Si(%)

Mn()

P()

S()

Cr()

Mo()

V(%)

0.17~0.25

0.150.35

0.350.85

≤0.030

≤0.035

1.201.50

0.65-0.80

0.250.35

21CrMoV5-7 steel MECHANICAL PROPERTIES

Hot working temperature /℃:

1100~850

Heat treatment temperature /℃|annealing / normalizing:

650~730

Heat treatment temperature /℃|quenching:

890~940(Oil or Air)

Heat treatment temperature /℃|tempering:

680~720

HBW:    205~250

205~250

Tensile strength, (≥)|σb/MPa:

700850

Yield strength, (≥)|σs/MPa:

550

Elongation, (≥)|δ5(%):

16

Impact, (≥)|AKV/J:

69