T21

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#T21

Description

T21 High Alloy and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:High Alloy: T21

Category	Type	Steel Grade
Steel Grades	High Alloy	T21
		T5c
		K41254
		T9
		K90941
		T11
		K11597
		T12
		K11562
		T17
		K12047

Chemical composition(mass fraction)(wt.%) of the T21

C ≤	Si ≤	Mn ≤	P ≤	S ≤	Cr	Ni
0.05-0.15	0.5-1	0.3-0.6	0.025	0.025	2.65-3.35
Mo	Al	Cu	Nb	Ti	V	Ce
0.8-1.06
N	Co	Pb	B	Other

Mechanical Properties of steel grade T21

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)
821 (≥)	835 (≥)	42	24	34	Solution and Aging, Annealing, Ausaging, Q+T,etc	414

Physical Properties of steel grade T21

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
21	-	-			0.41	-
534	179	-	32.3	244		-
466	-	12	13.2			334	341

Heat Treatment of steel grade T21

Heat treated : 1882°C - 1623°C

Technological Curves of steel grade T21

No Curve

Cross Reference Table (Equivalent Grade) of T21

Grade	Standard	Country	Application
BT21			Carbide for cutting tools
BT21			Carbide for cutting tools

Available Suppliers

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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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T21