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T20821

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H21 H22
#T20821

Description

USA UNS T20821 Alloy tool steel and T20821 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel And Hard Alloy: T20821
Category Type Steel Grade Standard Country Application
Steel GradesTool Steel And Hard Alloy T20821 UNS USA Alloy tool steel
T20810
H12
T20812
H13
T20813
H14
T20814
H19
T20819
H21

Chemical composition(mass fraction)(wt.%) of the T20821

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) V(%) W(%)
0.26～0.36 0.15～0.50 0.15～0.40 ≤0.030 ≤0.030 3.00～3.75 0.30～0.60 8.50～10.0

Mechanical Properties of steel grade T20821

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV/Ku (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
895 (≥) 613 (≥) 32 13 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 133

Physical Properties of steel grade T20821

Temperature
(°C)		 Modulus of elasticity
(GPa)		 Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)		 Specific thermal capacity
(J/kg·°C)		 Specific electrical resistivity
(Ω mm²/m)		 Density
(kg/dm³)		 Poisson’s coefficient, ν
32 - -     0.21 -  
284 321 - 13.3 411   -  
384 - 31 11.2   113 414

Heat Treatment of steel grade T20821

Heat treated : 1191°C - 1983°C

Technological Curves of steel grade T20821

Cross Reference Table (Equivalent Grade) of T20821

Grade Standard Country Application
T20821 UNS USA Alloy tool steel
H21 H22
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Jiangyou Longhai Special Steel Co.,Ltd.

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