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)
144 (≥)	181 (≥)	42	23	14	Solution and Aging, Annealing, Ausaging, Q+T,etc	122

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	-	-			0.32	-
479	549	-	32.3	312		-
786	-	32	43.2			431	412

Heat Treatment of steel grade T20821

Heat treated : 1676°C - 1372°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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Our main peoducts of steel are many kinds of special steel, like tool steel, mould steel, alloy steel, alloy constructural steel, heat-resistant steel, high speed tool steel,spring steel and bearing steel , stainless steel and so on, which have formed 12 series and more than 350 varieties with n...

Rfq.: sales@longhaisteel.com

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