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ISO 40CrMoV4-6 Details

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40CrMoV4-6 Application:Wrought steels for use at elevated temperatures in engines

Category Type Grade Microstructure Designations
Grades Stainless Steels - Special Steels 40CrMoV4-6 Bainite International - ISO , ISO/TR 4956 - Wrought steels for use at elevated temperatures in engines

Chemical composition(wt.%) of 40CrMoV4-6 grade: ISO/TR 4956

Elements Min.(≥) Max.(≤)
C 0.36 0.44
Si 0.15 0.35
Mn 0.45 0.85
P - 0.030
S - 0.030
Cr 0.90 1.20
Mo 0.55 0.75
Ni - -
V 0.25 0.35
Wrought steels for use at elevated temperatures in engines

Mechanical properties of grade 40CrMoV4-6 ISO/TR 4956

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
787 (≥) 941 (≥) 43 34 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 343

Physical properties of grade 40CrMoV4-6 ISO/TR 4956

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
539 (≥) 374 (≥) 12 31 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 143
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
633 786 868

40CrMoV4-6 - Form of Supply

Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED

Cross Reference Table(Equivalent Grade)

Grade Standard Country Application
40CrMoV4-6 AFNOR France
Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties
1.7711 AFNOR France
Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties
40CrMoV4-6 ISO International
Wrought steels for use at elevated temperatures in engines

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