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T7 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of T7

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SAE T7

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This page is mainly introduced the T7 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of T7,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
High-Speed Tool Steel

Steel Garde:T7
Type:Tool Die Steels
Country:USA
Standard:SAE
Application:High-Speed Tool Steel

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
T72301	AISI	USA
W2-A	SAE	USA
T72302	AISI	USA
T72305	AISI	USA

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C	0.70	0.75
Si	0.20	0.40
Mn	0.20	0.40
Cr	4.50	5.00
Mo
V	1.50	1.80
W	13.50	14.50

Mechanical Properties

Tensile strength	750～433	σb/MPa
Yield Strength	451	σ 0.2 ≥/MPa
Elongation	62	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	036～086	-
HRC	30	-

Physical Properties

Thermal expansion	91-03	e-6/K
Thermal conductivity	98-80	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	3690-7893	째C
Density	8245-4753	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)
T7 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