T20821

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#T20821

Description

USA UNS T20821 Tool Die Steels Hot-Work Tool Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Die Steels: T20821

Category	Class	Grade	Standard	Country	Application
Steel Grades	Tool Die Steels	T20821	UNS	USA	Hot-Work Tool Steel

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

C	Si	Mn	P	S	Cr	Mo	V	W	Ni＋Cu
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 -10.00	≤0.75

Mechanical Properties of steel grade T20821

Yield R_p0.2 (MPa)	Tensile R_m (MPa)	Impact KV/Ku (J)	Elongation A (%)	Reduction in cross section on fracture Z (%)	As-Heat-Treated Condition	Brinell hardness (HBW)
343 (≥)	396 (≥)	41	21	33	Solution and Aging, Annealing, Ausaging, Q+T,etc	433

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
13	-	-			0.32	-
837	429	-	31.3	141		-
189	-	43	33.2			241	433

Heat Treatment of steel grade T20821

Heat treated : 1885°C - 1846°C

Technological Curves of steel grade T20821

No Curve

Cross Reference Table (Equivalent Grade) of T20821

Grade	Standard	Country	Application
UNS T20821
T20821
T20821
T20821

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Rfq.: sales@longhaisteel.com

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