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T20821 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of T20821

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UNS T20821

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This page is mainly introduced the T20821 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of T20821,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Hot-Work Tool Steel

Steel Garde:T20821
Type:Tool Die Steels
Country:USA
Standard:UNS
Application:Hot-Work Tool Steel

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
T20821	UNS	USA

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C	0.26	0.36
Si	0.15	0.50
Mn	0.15	0.40
P		0.030
S		0.030
Cr	3.00	3.75
Mo
V	0.30	0.60
W	8.50	10.00
Ni＋Cu		0.75

Mechanical Properties

Tensile strength	376～055	σb/MPa
Yield Strength	157	σ 0.2 ≥/MPa
Elongation	33	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	781～448	-
HRC	30	-

Physical Properties

Thermal expansion	01-53	e-6/K
Thermal conductivity	43-12	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	0784-0812	째C
Density	3636-3939	kg/m³
Resistivity	0.50-0.60	Ohm.mm²/m

Heat Treatment Regime

Annealing	Quenching	Tempering	Normalizing	Q & T
√	√	√	√	√

Size Availability

Steel Grade	Specification	Processing range(mm)
T20821 Tool Die Steels	Round Bar and Hollow Bar	Φ1 to Φ2000
	Square and Flat Steel	Φ10 to Φ100
	Plate and Sheet	0.08-800(Thickness)10-1500(Width)Length
	Tube or Pipe	OD:Φ4-410; WT:1-35 mm; Lenght:10-12000
	Coil and Strip Steel	THK:0.1mm Width:1500mm
	Forged	Ring/Cylindrical/Disk