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M4Application:Molybdenum series High-speed tool steel
CategoryTypeSteel gradeStandardCountry
Grades Special Alloy M4ASTMUSA

Chemical composition%of the ladle analysis of gradeM4

C(%)Si(%)Mn(%)P(%)S(%)Cr(%)Mo(%)V(%)W(%)
1.25~1.400.20~0.450.15~0.40≤0.030≤0.0303.75~4.754.25~5.503.75~4.505.25~6.50
M4
Mechanical properties of gradeM4
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)
643(≥)773(≥)332231Solution and Aging,Annealing,Ausaging,Q+T,etc343
Physical properties of gradeM4
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
347(≥)914(≥)411121Solution and Aging,Annealing,Ausaging,Q+T,etc441
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0)N/mm2
Creep rupture strength
(10000h)
(Rp1,0)N/mm2
874224495
M4Range 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
A 564 S45000ASTMUSA
Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes
A 693 S45000ASTMUSA
Precipitation-Hardening Stainless and Heat-Resisting Steel Plate, Sheet, and Strip
A 705 S45000ASTMUSA
Age-Hardening Stainless Steel Forgings
S45000ASTMUSA
Stainless Steel
SA-564 S45000ASTMUSA
Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes
SA-693 S45000ASTMUSA
Specification for Precipitation-Hardening Stainless and Heat-Resisting Steel Plate, Sheet, and Strip
SA-705 S45000ASTMUSA
Specification for Age-Hardening Stainless Steel Forgings
A 313 S45500ASTMUSA
Stainless Steel Spring Wire
A 564 S45500ASTMUSA
Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes
A 693 S45500ASTMUSA
Precipitation-Hardening Stainless and Heat-Resisting Steel Plate, Sheet, and Strip
A 705 S45500ASTMUSA
Age-Hardening Stainless Steel Forgings
S45500ASTMUSA
Stainless Steel (Custom 455)
SA-564 S45500ASTMUSA
Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes
SA-693 S45500ASTMUSA
Specification for Precipitation-Hardening Stainless and Heat-Resisting Steel Plate, Sheet, and Strip
SA-705 S45500ASTMUSA
Specification for Age-Hardening Stainless Steel Forgings
Custom 450ASTMUSA
Steel, Corrosion Resistant Bars, Forgings, Tubing, and Rings 15Cr - 6.5Ni - 0.75Mo - 0.50 (Cb + Ta) - 1.5Cu Solution Heat Treated
Custom 450ASTMUSA
Steel, Corrosion-Resistant, Bars, Wire, Forgings, Tubing, and Rings 15Cr - 6.5Ni - 0.75Mo - 0.30 Cb (Nb) - 1.5Cu Consumable Electrode Remelted, Solution Heat Treated Precipitation Hardenable
Custom 450ASTMUSA
Steel, Corrosion Resistant, Sheet, Strip, and Plate 15Cr - 6.5Ni - 0.75Mo - 0.30Cb - 1.5Cu Consumable Electrode Melted, Solution Heat Treated Precipitation Hardenable
Custom 450ASTMUSA
Steel, Corrosion Resistant, Sheet, Strip, and Plate 15Cr - 6.5Ni - 0.75Mo - 0.60Cb - 1.5Cu Solution Heat Treated, Precipitation Hardenable
Custom 450ASTMUSA
Steel, Corrosion Resistant Bars, Forgings, Tubing, and Rings 15Cr - 6.5Ni - 0.75Mo - 0.50 (Cb + Ta) - 1.5Cu Solution Heat Treated

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