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T4 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of T4

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ASTM T4

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This page is mainly introduced the T4 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of T4,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:T4
Type:Tool Die Steels
Country:USA
Standard:ASTM
Application:High-Speed Tool Steel

Relevant products:

DT413 / 4Cr5MoSiV1MOD

1.2714(L6, 55NiCr...

T45Cr5Si3(IS 1570...

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
T41901	UNS	USA
T41902	UNS	USA
T41904	UNS	USA
T41905	UNS	USA
T41906	UNS	USA
T41907	UNS	USA
Stellite T40	Whole	Whole

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C	0.70	0.80
Si	0.20	0.40
Mn	0.10	0.40
P		0.030
S		0.030
Cr	3.75	4.50
Mo	0.40	1.00
V	0.80	1.20
W	17.50	19.00
Co	4.25	5.75

Mechanical Properties

Tensile strength	329～233	σb/MPa
Yield Strength	789	σ 0.2 ≥/MPa
Elongation	69	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	997～042	-
HRC	30	-

Physical Properties

Thermal expansion	81-52	e-6/K
Thermal conductivity	38-54	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	9720-3178	째C
Density	3864-9730	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)
T4 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