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H21Application:Alloy tool steel
CategoryTypeSteel gradeStandardCountry
Grades Special Alloy H21ASTMUSA

Chemical composition%of the ladle analysis of gradeH21

C(%)Si(%)Mn(%)P(%)S(%)Cr(%)V(%)W(%)
0.26~0.360.15~0.500.15~0.40≤0.030≤0.0303.00~3.750.30~0.608.50~10.0
H21
Mechanical properties of gradeH21
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)
376(≥)836(≥)434314Solution and Aging,Annealing,Ausaging,Q+T,etc231
Physical properties of gradeH21
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
251(≥)845(≥)144313Solution and Aging,Annealing,Ausaging,Q+T,etc332
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0)N/mm2
Creep rupture strength
(10000h)
(Rp1,0)N/mm2
677994884
H21Range 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
GH2130ASTMUSA
Classification and designation for superalloys and high temperature intermetallic materials
GH2132ASTMUSA
Classification and designation for superalloys and high temperature intermetallic materials
GH2135ASTMUSA
Classification and designation for superalloys and high temperature intermetallic materials
GH2136ASTMUSA
Classification and designation for superalloys and high temperature intermetallic materials
03X21H21M4ΓБASTMUSA
Russia GOCT standard stainless steel and heat resistant steel steel grade and chemical composition
SUH21ASTMUSA
CNS standard heat resistant steel plate of the steel grade and chemical composition
ISO H21ASTMUSA
Nickel and nickel alloy forgings
H21ASTMUSA
Hot-Work Tool Steel
H21ASTMUSA
Hot-Work Tool Steel

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