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21CrMoV5-7 Alloy steel

Prouduct name: 21CrMoV5-7 Alloy steel

abstract: 21CrMoV5-7 Alloy steelMATERIAL STANDARDS: DIN EN 10028-2 (2003), DIN 17755 (1983)

Popular in these Categories: Alloy Steel

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21CrMoV5-7 Alloy steel
MATERIAL STANDARDS: DIN EN 10028-2 (2003), DIN 17755 (1983) 
CHEMICAL COMPOSITION (WEIGHT %)
C (%):     0.17 ~ 0.25
Si (%):     ≤ 0.40
Mn (%):   0.40 ~ 0.80
P (%)≤:   0.030
S (%)≤:   0.030
Cr (%):    1.20 ~ 1.50
Mo (%):   0.55 ~ 0.85
Ni (%):    ≤ 0.60
V (%):     0.20 ~ 0.35
Others (%):  Al ≤ 0.030
MECHANICAL PROPERTIES - HOT WORKING, HEAT TREATMENT AND HARDNESS
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
Tensile strength, (≥)|σb/MPa: 700~850
Yield strength, (≥)|σs/MPa: 550
Elongation, (≥)|δ5(%): 16.0
Impact strength,  (≥)|AKv/J: 69            
MECHANICAL PROPERTY UNDER HIGH TEMPERATURE
Yield strength σ0.2≥/MPa|200℃:    500
Yield strength σ0.2≥/MPa|300℃:    460
Yield strength σ0.2≥/MPa|350℃:    441
Yield strength σ0.2≥/MPa|400℃:    412
Yield strength σ0.2≥/MPa|450℃:    372
Yield strength σ0.2≥/MPa|500℃:    334
MAIN FEATURES AND MELTING PROCESS
The steels shall be manufactured by melting process EF, LF + EAF+ VD, IFF + ESR Melted. VIM + ESR can be handled by agreement.
Forgings may be furnished in one of the following conditions: stress relieving; annealing; solution treatment; solution treatment and ageing; normalizing; normalizing and tempering; or quenching and tempering.
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.
Power generation – turbine fasteners – boiler support rods
Process plant – fasteners
Mechanical gears, gear shaft, main axis, valve rods
Mechanical parts - connecting rods, bolts and nuts
Multidiameter shafts

PRODUCT PROFILE AND SUPPLYING FORMS
Round bar (Diameter):  0.50mm to 800mm
Square bar / Flat bar:   3mm to 800mm
Length: random length, fixed length or based on the customer's special requirement.
Steel strip: T0.20 ~ 3mm X W10 ~ 2000mm X Coil
Heavy/middle plate via hot rolled: T4 - 200mm X W1000- 2500mm X L1000-12000mm
Forging piece: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /other different shapes based on OEM.  

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