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D4Application:Alloy tool steel
CategoryTypeSteel gradeStandardCountry
Grades Special Alloy D4ASTMUSA

Chemical composition%of the ladle analysis of gradeD4

C(%)Si(%)Mn(%)P(%)S(%)Ni(%)Mo(%)V(%)
2.05~2.400.10~0.600.10~0.60≤0.030≤0.03011.0~13.00.70~1.200.15~1.00
D4
Mechanical properties of gradeD4
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 ConditionBrinell hardness(HBW)
835(≥)255(≥)343313Solution and Aging,Annealing,Ausaging,Q+T,etc332
Physical properties of gradeD4
PropertyDensity
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
455(≥)694(≥)212332Solution and Aging,Annealing,Ausaging,Q+T,etc423
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0)N/mm2
Creep rupture strength
(10000h)
(Rp1,0)N/mm2
338953451
D4Range of products
Product typeProductsDimensionProcessesDeliver Status
Plates/SheetsPlates/Sheets0.08-200mm(T)*W*LForging,hot rolling and cold rollingAnnealed,Solution and Aging,Q+T,ACID-WASHED,Shot Blasting
Steel BarRound Bar,Flat Bar,Square BarΦ8-1200mm*LForging,hot rolling and cold rolling,CastBlack,Rough Turning,Shot Blasting,
Coil/StripSteel Coil/Steel Strip0.03-16.0x1200mmCold-Rolled&Hot-RolledAnnealed,Solution and Aging,Q+T,ACID-WASHED,Shot Blasting
Pipes/TubesSeamless Pipes/Tubes,Welded Pipes/TubesOD:6-219mm x WT:0.5-20.0mmHot extrusion,Cold Drawn,WeldedAnnealed,Solution and Aging,Q+T,ACID-WASHED
Cross Reference Table(Equivalent Grade)
GradeStandardCountryApplication
D4ASTMUSA
Cold-Work Tool Steel
35CD4 Air 9160CASTMUSA
SPECIAL STEEL GRADES APPROVED FOR USE IN THE AEROSPACE INDUSTRY.
25CD4S Air 9160/CASTMUSA
wrought steels used in aeronautical constructions
35CD4 Air 9160/CASTMUSA
wrought steels used in aeronautical constructions

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